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Tytuł:
New institutional framework for global climate change prevention
Новая институциональная модель предупреждения глобального изменения климата
Нова інституціональна модель попередження глобальної зміни клімату
Autorzy:
Presse, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/692372.pdf
Data publikacji:
2018
Wydawca:
Dnieprowski Uniwersytet Narodowy im. Ołesia Honczara
Tematy:
підприємництво
зміна клімату
корпоративне управління
стале управління
глобальна економічна політика
предпринимательство
изменение климата
корпоративное управление
устойчивое управление
глобальная экономическая политика
entrepreneurship
climate change
corporate governance
sustainable management
global economic policy
Opis:
Мета дослідження – оглянути точку зору фірм, що пропонують викопне паливо, на теорію загального надбання людства (theory of global commons). Спільне надбання людства охоплює сфери і ресурси, що виходять за рамки національних юрисдикцій. Тим не менш, на даний момент їх управління здійснюється національними державами. Дизайн/Метод/Підхід. В данній статті запропоновано підхід до загального надбання людства з точки зору фірм. Результат: На сьогоднішній день компанії взаємодіють з національними державами щодо емісії вуглекислого газу і, ймовірно, міжнародних схем торгівлі квотами на емісію. Розглянута теорія пропонує перенести відповідальність національного рівня на міжнародний рівень управління, тобто на Організацію Об'єднаних Націй. Теоретичне значення дослідження: При зміщенні механізму контролю в бік палива, що надходить в економіку, більшість компаній (крім видобувних компаній) зможуть сконцентруватися на тому, на чому вони і повинні концентруватися – на задоволенні потреб своїх клієнтів. Компанії ж, що видобувають викопне паливо, будуть зобов'язані купувати права на емісію палива до того, як це паливо потрапить в економічний цикл. Даний підхід створить економічний стимул для компаній застосовувати технології з низьким або нульовим рівнем споживання викопного палива і дозволить зробити перехід від викопного палива легко планованим. Таким чином, запропонований механізм може називатися іммісійною схемою (від латинського immissio, "впускати"). Оригінальність/Цінність: Управління спільним надбанням людства на рівні національних держав є мало прийнятним, а також не відображає природу використовуваних ресурсів. Дана стаття пропонує одне з рішень проблеми глобальної зміни клімату. Перспективи подальших досліджень. Буде потрібно дослідження застосованості даної схеми до різних видів промисловості, а також у прив'язці до різних типів викопного палива. Тип статті – теоретична.
Цель исследования – рассмотреть точку зрения фирм, предлагающих ископаемое топливо, на теорию общего достояния человечества (theory of global commons). Общее достояние человечества охватывает сферы и ресурсы, выходящие за рамки национальных юрисдикций. Тем не менее, их управление осуществляется на данный момент национальными государствами. Дизайн/Метод/Подход. В данной статье предложен подход к общему достоянию человечества с точки зрения фирм. Результат: На сегодняшний день компании взаимодействуют с национальными государствами касательно их эмиссии и, вероятно, международных схем торговли квотами на эмиссию. Развиваемая теория предлагает перенести ответственность национального уровня на международный уровень управления, то есть на Организацию Объединенных Наций. Теоретическое значение исследования: При смещении механизма контроля в сторону топлива, поступающего в экономику, большинство компаний (кроме добывающих компаний) смогут сконцентрироваться на том, на чем они и должны концентрироваться – на удовлетворении потребностей своих клиентов. Компании же, добывающие ископаемое топливо, будут обязаны приобретать права на эмиссию топлива до того, как это топливо попадет в экономический цикл. Данный подход создаст экономический стимул для компаний применять технологии с низким или нулевым уровнем потребления ископаемого топлива и позволит сделать переход от ископаемого топлива легко планируемым. Таким образом, предлагаемый механизм может называться иммисионной схемой (от латинского immissio, “впускать”). Оригинальность/Ценность. Управление общим достоянием человечества на уровне национальных государств является мало применимым, а также не отображает природу используемых ресурсов. В данной статье предложено одно из решений проблемы глобального изменения климата. Перспективы дальнейших исследований. Потребуется исследование применимости данной схемы к различным видам промышленности, а также в привязке к различным типам ископаемого топлива. Тип статьи – теоретическая.
Purpose. This conceptual paper takes the firms’ perspective about practical implications of the theory of the global commons. Global commons are the areas and resources defined as those being beyond national jurisdictions. Their governance, today, however, is still coordinated largely by national states. Design/Method/Approach. This paper introduces a firm's perspective based on the global commons approach. Findings. At present, companies deal with national governments concerning their emissions and, perhaps, the international emissions trading scheme. Theory argues about the need to shift the responsibility from the national to global governmental levels, i. e. the United Nations. Theoretical implications. Given the input orientation put forward by this approach, companies – except fossil fuel extractors – would not actually have to deal with any governmental or regulatory bodies but can focus their capabilities on what they are best at: serving the needs of their customers. Fossil fuel extracting companies, in order to sell these fossil fuels, will have to purchase the amount of emission rights before they sell the fuel into the economic cycle. This approach establishes an economic incentive for companies to employ technologies with low or zero fossil fuel consumption while making the transition path predictable. The underlying concept, therefore, can also be referred to as an immissions scheme (from Latin immissio, “to let in”). Originality/Value. Governing a global common through national structures is inappropriate and does not reflect the nature of the underlying resource. This paper proposes a solution to the problem of global climate change. Further research. Further research is needed to address the effect of this strategy on different industries, and how those are affected based on the degree to which they employ fossil fuels. Paper type – сonceptual.
Źródło:
European Journal of Management Issues; 2018, 26, 1-2; 29-38
2519-8564
Pojawia się w:
European Journal of Management Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uklad Giardia - zywiciel: zmiennosc obrazu inwazji
Autorzy:
Majewska, A C
Powiązania:
https://bibliotekanauki.pl/articles/836470.pdf
Data publikacji:
1994
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
interakcje zywiciel-pasozyt
choroby inwazyjne
lamblia
pasozyty zwierzat
Giardia
parazytologia
giardioza
inwazja pasozytnicza
zywiciele
pasozyty czlowieka
Opis:
In man, as well as in many species of vertebrates there exist several populations of Giardia duodenalis group which, though morphologically indistinguishable, show different level of heterogenicity in several characteristics, a. o. in surface antigens, isoenzyme make-up, RFLP, invasiveness for different hosts or pattern of experimental infection. Also the clinical observations in man distinctly suggested that G. intestinalis comprises several different populations. In the course of giardiosis apparent variability in clinical manifestations can be observed. In many patients the infection is symptomless and resolves spontaneously and in some others – variable intensity of symptoms is observed. Most likely both the parasit's characteristics and the host's feature will determine the clinical character of infection. It is well known that in some cases it is the host that responsible for the symptoms of the infection. Thus, for instance, clinical giardiosis links with immunodeficiency, malnutrition or young age. There are also evidences that some Giardia isolates have enhanced potency to provoke the disease of the host. It is considered that the variable pattern of the infection may be related to three different factors in host-parasite relationship: extra- and intrapopulation variability of Giardia isolates, the microenvironmental factors of the host's intestine, and the variable immune response of the host. The author describes data on the two first factors.
Źródło:
Annals of Parasitology; 1994, 40, 1; 3-9
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence results for Dirichlet problems with degenerated p-Laplacian
Autorzy:
Cavalheiro, A. C
Powiązania:
https://bibliotekanauki.pl/articles/254803.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
degenerate elliptic equations
entropy solutions
weighted Sobolev spaces
Opis:
In this article, we prove the existence of entropy solutions for the Dirichlet problem [formula] where Ω is a bounded open set of [formula].
Źródło:
Opuscula Mathematica; 2013, 33, 3; 439-453
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and uniqueness of the solutions of some degenerate nonlinear elliptic equations
Autorzy:
Cavalheiro, A. C
Powiązania:
https://bibliotekanauki.pl/articles/255079.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
degenerate nonlinear elliptic equations
weighted Sobolev spaces
Opis:
In this paper we are interested in the existence of solutions for the Dirichlet problem associated with degenerate nonlinear elliptic equations [formula] in the setting of the weighted Sobolev spaces [formula].
Źródło:
Opuscula Mathematica; 2014, 34, 1; 15-28
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taxonomy of Giardia and Cryptosporidium: facts and controversies
Autorzy:
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/6079.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
taxonomy
Giardia
Cryptosporidium
parasite
protozoan parasite
human disease
parasitic disease
Źródło:
Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Układ Giardia - żywiciel: zmienność obrazu inwazji
Autorzy:
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2151421.pdf
Data publikacji:
1994
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
interakcje zywiciel-pasozyt
choroby inwazyjne
lamblia
pasozyty zwierzat
Giardia
parazytologia
giardioza
inwazja pasozytnicza
zywiciele
pasozyty czlowieka
Opis:
In man, as well as in many species of vertebrates there exist several populations of Giardia duodenalis group which, though morphologically indistinguishable, show different level of heterogenicity in several characteristics, a. o. in surface antigens, isoenzyme make-up, RFLP, invasiveness for different hosts or pattern of experimental infection. Also the clinical observations in man distinctly suggested that G. intestinalis comprises several different populations. In the course of giardiosis apparent variability in clinical manifestations can be observed. In many patients the infection is symptomless and resolves spontaneously and in some others – variable intensity of symptoms is observed. Most likely both the parasit's characteristics and the host's feature will determine the clinical character of infection. It is well known that in some cases it is the host that responsible for the symptoms of the infection. Thus, for instance, clinical giardiosis links with immunodeficiency, malnutrition or young age. There are also evidences that some Giardia isolates have enhanced potency to provoke the disease of the host. It is considered that the variable pattern of the infection may be related to three different factors in host-parasite relationship: extra- and intrapopulation variability of Giardia isolates, the microenvironmental factors of the host's intestine, and the variable immune response of the host. The author describes data on the two first factors.
Źródło:
Wiadomości Parazytologiczne; 1994, 40, 1; 3-9
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Class of Product-Type Exponential Estimators of the Population Mean in Simple Random Sampling Scheme
Autorzy:
Onyeka, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/465727.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
ratio-type and product-type exponential estimators
auxiliary character
simple random sampling
mean square error
Opis:
The present study proposes a class of product-type exponential estimators for estimating the population mean of the study variable, using known values of some population parameters of an auxiliary character, under the simple random sampling without replacement (SRSWOR) scheme. Furthermore, the study also proposes a modified exponential estimator based on both the ratio-type and the product-type exponential estimators. Properties of the proposed estimators, under the SRSWOR scheme, are obtained up to first order approximation. The modified exponential estimator under optimum conditions is shown to be more efficient than the simple sample mean and the ratio-type and product-type exponential estimators. The theoretical results are supported by an empirical illustration.
Źródło:
Statistics in Transition new series; 2013, 14, 2; 189-200
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remarks on the Tithonian-Berriasian ammonite biostratigraphy of west central Argentina
Autorzy:
Riccardi, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2077329.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Tithonian-Berriasian
ammonites
west central Argentina
calpionellids
nannofossils
radiolarians
geochronology
tyton
Berrias
amonity
Argentyna
promienice
geochronologia
Opis:
Status and correlation of Andean ammonite biozones are reviewed. Available calpionellid, nannofossil, and radiolarian data, as well as radioisotopic ages, are also considered, especially when directly related to ammonite zones. There is no attempt to deal with the definition of the Jurassic–Cretaceous limit. Correlation of the V. mendozanum Zone with the Semiforme Zone is ratified, but it is open to question if its lower part should be correlated with the upper part of the Darwini Zone. The Pseudolissoceras zitteli Zone is characterized by an assemblage also recorded from Mexico, Cuba and the Betic Ranges of Spain, indicative of the Semiforme–Fallauxi standard zones. The Aulacosphinctes proximus Zone, which is correlated with the Ponti Standard Zone, appears to be closely related to the overlying Windhauseniceras internispinosum Zone, although its biostratigraphic status needs to be reconsidered. On the basis of ammonites, radiolarians and calpionellids the Windhauseniceras internispinosum Assemblage Zone is approximately equivalent to the Suarites bituberculatum Zone of Mexico, the Paralytohoplites caribbeanus Zone of Cuba and the Simplisphinctes/Microcanthum Zone of the Standard Zonation. The C. alternans Zone could be correlated with the uppermost Microcanthum and “Durangites” zones, although in west central Argentina it could be mostly restricted to levels equivalent to the “Durangites Zone”. The Substeueroceras koeneni Zone ranges into the Occitanica Zone, Subalpina and Privasensis subzones, the A. noduliferum Zone could be equivalent to the Dalmasi Subzone, Occitanica Zone, to lower part of the Boissieri Zone, and the S. damesi Zone could range through the upper part of the Boissieri Zone to the lower part of the Pertransiens Zone. Division of the Substeueroceras koeneni Zone and a precise correlation between the Andean ammonite zones and the international standard require new systematic and stratigraphic studies.
Źródło:
Volumina Jurassica; 2015, 13, 2; 23--52
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling oil spill around Bay of Samsun, Turkey, with the use of OILMAP and ADIOS software systems
Autorzy:
Toz, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/259466.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
trajectory
oil spill
Bay of Samsun
Turkey
ADIOS
OILMAP
Black Sea
modelling
Opis:
Bay of Samsun is one of the most important oil transport gateways in Black Sea. The region is surrounded with the coasts which have various levels of environmental sensitivity. The purpose of this study is to investigate the oil spill and predict the future accidents likely to be encountered around the Bay of Samsun. To be well informed about fate, this study makes the best possible use of two trajectory models. One of them, ADIOS (Automated Data Inquiry for Oil Spills), has been applied to natural degradation calculations, and the other one, OILMAP (oil spill model and response system), has been used for surface spread simulation. Hence in order to identify the risky areas three scenarios have been developed. Their results reveal that in case of oil spills, with average environmental conditions, there is a risk of contamination for the city of Samsun. Although the area under the risk is the same, contamination density is totally different depending upon the quantity and the type of spilt oil. The results gained through these efforts are hoped to be useful for many organizations dealing with oil spill response operations and contribute to an effective coordination among the relevant institutions.
Źródło:
Polish Maritime Research; 2017, 3; 115-125
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro susceptibility of Giardia isolates of human and animal origin to natamycin
Autorzy:
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/837538.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
metronidazole
man
Giardia
drug
giardiasis
animal
natamycin
Protozoa
ornidazole
in vitro
parasitosis
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molekularne mechanizmy lekoopornosci pasozytow
Autorzy:
Majewska, A C
Powiązania:
https://bibliotekanauki.pl/articles/839311.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
lekoopornosc
parazytologia
mechanizmy molekularne
pasozyty
Opis:
In spite of the enormous achievements of medical and biological sciences, parasites still constitute important medical and veterinary problem. One of the main obstacles in the treatment and eradication of human and animals parasitic diseases is drug resistance of parasites. This phenomenon has more and more frequently been described both in medical and veterinary practice. The application of numerous molecular biology techniques in modern parasitological laboratories have enabled the investigations of parasites at the DNA level. The results of these studies have revolutionised our knowledge and made possible the recognition of not only the reasons and extent of genetic differentiation of parasites but also the recognition of genetic and molecular mechamisms of drug resistance. The results of many studies showed interspecific, interpopulational, and even intrapopulational heterogeneity of parasites in their sensitivity to antiparasitic drugs. Moreover, it has been found that in various parasites there often exist different molecular bases of the drug resistance. The review concerns different molecular mechanisms of drug resistance in selected parasite taxa (Schistosoma spp., Haemonchus contortus, Leishmania spp., Plasmodium falciparum, Entamoeba histolytica).
Źródło:
Annals of Parasitology; 1998, 44, 2; 139-150
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molekularne mechanizmy lekooporności pasożytów
Autorzy:
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2148863.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
lekoopornosc
parazytologia
mechanizmy molekularne
pasozyty
Opis:
In spite of the enormous achievements of medical and biological sciences, parasites still constitute important medical and veterinary problem. One of the main obstacles in the treatment and eradication of human and animals parasitic diseases is drug resistance of parasites. This phenomenon has more and more frequently been described both in medical and veterinary practice. The application of numerous molecular biology techniques in modern parasitological laboratories have enabled the investigations of parasites at the DNA level. The results of these studies have revolutionised our knowledge and made possible the recognition of not only the reasons and extent of genetic differentiation of parasites but also the recognition of genetic and molecular mechamisms of drug resistance. The results of many studies showed interspecific, interpopulational, and even intrapopulational heterogeneity of parasites in their sensitivity to antiparasitic drugs. Moreover, it has been found that in various parasites there often exist different molecular bases of the drug resistance. The review concerns different molecular mechanisms of drug resistance in selected parasite taxa (Schistosoma spp., Haemonchus contortus, Leishmania spp., Plasmodium falciparum, Entamoeba histolytica).
Źródło:
Wiadomości Parazytologiczne; 1998, 44, 2; 139-150
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Squamous cell carcinoma of the eyelid in a cat
Rak płaskonabłonkowy powieki u kota
Autorzy:
Oliver, J.A.C.
Powiązania:
https://bibliotekanauki.pl/articles/9944.pdf
Data publikacji:
2013
Wydawca:
Okulistyka Weterynaryjna
Źródło:
Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii; 2013, 3
2082-9256
Pojawia się w:
Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New and unusual upper Llandovery graptolites from Arctic Canada
Autorzy:
Lenz, A C
Kozlowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/20163.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
graptolite
Mirorgraptus arcticus
Silurian
Llandovery
skeleton
morphology
Arctic Canada
Pseudoplegmatograptus cf.obesus
stratigraphy
systematics
Giganteograptus giganteus
biostratigraphy
paleontology
Graptoloidea
Pileograptus pileatus
Opis:
Three isolated and well−preserved retiolitid taxa, two of them new, and one taxon of unknown affinity, are described from the upper Llandovery of Arctic Canada. All taxa display unusual characteristics The three retiolitids display extraordinary morphological features: Pseudoplegmatograptus cf. obesus preserves very delicate and lacey or cobweb−like list structures external to the main skeletal lists, structures previously seen only rarely on flattened material; Pileograptus pileatus gen. et sp. nov. possesses a thecal framework typical of retiolitines, particularly Stomatograptus, but its thecal orifices possess broad, meshwork genicular hoods similar to those in the plectograptines; and Giganteograptus giganteus, formerly attributed to Pseudoplegmatograptus, with its very coarse and relatively simple skeletal framework, well−developed paired thecal apertural spines, and a pustulose micro−ornamentation on the lists. The latter feature suggests an assignment to the subfamily Plectograptinae, rather than to the Retiolitinae as has been previously presumed. The presence of pustulose lists in Giganteograptus adds a further complication to understanding of retiolitid evolution. Mirorgraptus arcticus gen. et sp. nov., the fourth taxon and of unknown systematic affinity, lacks the proximal end, but preserves lists with seams and some fusellar material suggestive of some type of new retiolitid. Unlike known retiolitids or other graptolites, however, the skeletal list development is apparently confined to a narrow region along one side of the nema.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatnosc metod analizy genomu w diagnostyce giardiozy i kryptosporydiozy
Autorzy:
Kasprzak, W
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/840681.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
kryptosporydioza
choroby inwazyjne
parazytologia
genomy
diagnostyka
giardioza
metody analizy
Opis:
The article comprises a critical review on practical applications of molecular technology in parasitological diagnostics in a broad sense, also as a diagnosis of species and a method of epidemiological analysis. Techniques of genome analysis at different levels, as specific nucleic acid probes, DNA restriction profiles (RFLP), hybridization techniques, pulse-field gel electrophoresis, in vitro nucleic acid amplification, and DNA fingerprint technique used in studies on Giardia and Cryptosporidium were discussed. The essential reservation as far as this technology is concerned refers to its usefulness in parasitological diagnostics; there is no sense in working out methods for recognizing parasites which could otherwise be identified by well trained parasitologists and simple microscopic methods. The improved diagnosis of parasites resulting from the application of molecular technology significantly contributed to the armentarium of parasitologists. Application of recent molecular technology in diagnosis of giardiosis and cryptosporidiosis may basically support clinical diagnosis which provides possibilities of early and selective treatment and makes possible epidemiological studies. These assays will permit not only a rapid diagnosis and exact differentiation but will also enable a better recognition of Giardia and Cryptosporidium genome organization. However, in spite of the wide availability of this new techniques they have not been fully applied - as yet – in diagnosis and in epidemiological studies on these parasites. The authors share the opinion of BUSCH (1991) on the need of proper recognition of high-quality and rigorous work in employing new molecular assays, because their wide availability and high sensitivity could cause "false-positive" results by contamination with amplified DNA sequences. They totally support the conclusion made by THOMPSON and MELONI (1993) that the molecular data must be fairly interpreted by collaborating molecular biologists, parasitologists, and epidemiologists - and clinicians as well - to avoid forming of a confusing picture of genetic diversity of the parasites with no practical application.
Źródło:
Annals of Parasitology; 1995, 41, 1; 3-11
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wodnopochodne epidemie Giardia
Autorzy:
Majewska, A C
Kasprzak, W.
Powiązania:
https://bibliotekanauki.pl/articles/841170.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
lamblia
Giardia
epidemie
parazytologia
pasozyty
epidemiologia
Opis:
The authors present the actual informations on waterborne outbreaks of giardiosis as well as the evidences of Giardia cyst transmission by municipal water supply. In the article a recommendation is given to molecular biology techniques which contributed to the armentarium applied in the modern diagnostics of giardiosis.
Źródło:
Annals of Parasitology; 1995, 41, 1; 25-31
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of changing energy mix of Turkey on CO2 emission intensities
Autorzy:
Köne, A. C.
Büke, T.
Powiązania:
https://bibliotekanauki.pl/articles/207324.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Laspeyres method
fuel carbon
carbon dioxide
Turkey
metoda Laspeyresa
paliwa kopalne
dwutlenek węgla
Turcja
Opis:
A decomposition analysis of energy-related carbon dioxide emission intensities in Turkey from 1971 to 2010 has been presented. The refined Laspeyres method is used in the calculation to identify fossil fuel carbon effect, fossil fuel share effect and energy intensity effect that accelerate or reduce the increase in carbon dioxide emission intensities. The results show that the fossil fuel share effect and the energy intensity effect are the two biggest contributors to CO2 emission. The case analysis also shows that fossil fuel carbon effects play important roles in the decrease of CO2 emission intensities especially from 1988 to 2010.
Źródło:
Environment Protection Engineering; 2016, 42, 3; 85-93
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Management and Characterization of Textile Solid Waste in a Local Productive Arrangement
Charakterystyka starych odpadów tekstylnych i zarządzanie nimi w lokalnych zgrupowaniach produkcyjnych
Autorzy:
Pinheiro, E.
Francisco, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/233116.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
waste management
textile solid waste
characterization
local productive arrangement
gospodarka odpadami
odpady tekstylne
Opis:
The present research has the objective of identifying the characterization and management of textile solid waste generated in clothing manufacturing within a local productive arrangement (LPA) in Brazil. The importance of this research consists in the data presentation and survey which indicate the scenario of textile solid waste, enabling the promotion of appropriate and sustainable management actions for these materials. Thus it is exploratory research with a qualitative and quantitative approach. After analysing the data, the main characteristics, dimensions and management practices of textile solid waste in these industries are presented. The research results point out a considerable amount of textile solid waste that is generated and appropriate practices for the management of such waste. Nevertheless there is a need for improvement of this process aiming at enhancement opportunities of the materials mentioned as raw material in the development of the same products or other segments, in order to promote sustainable action.
Artykuł ma na celu charakteryzację odpadów generowanych podczas produkcji odzieżowej w obszarze lokalnego zgromadzenia produkcyjnego w Brazylii. Analiza umożliwia identyfikację istniejącego systemu i poprawę zgodnie z zasadami zrównoważonego rozwoju.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 4 (118); 8-13
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High frequency ship radiated noise in shallow water
Autorzy:
Carbó, R.
Molero, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/332483.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The stationary acoustic field in a two pIane parallel medium, sea surface and sea boftom, when a source near to the sea surface radiates, is characterized by the thickness of the medium and the reflectivity of the boundary surfaces. It is known that the maxima and minima of pressure are produced at same given depths depending on the radiated frequency and distance. Considering the ship noise as an acoustical source, the frequency spectrum of the acoustic pressure at certain depth, is nof only the spectrum of the acoustic ship noise but it is also modified by the wave field originated by consecutive reflections at the boundary surfaces. As a consequence, over the free field spectrum of (he ship noise, a series of minima appears. The corresponding frequencies are those for which the receiver is located at the nodes of the stationary wave field.
Źródło:
Hydroacoustics; 1999, 2; 213-218
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wirusy pasożytniczych pierwotniaków
VIRUSES OF PARASITIC PROTOZOA
Autorzy:
Kasprzak, W.
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2149109.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
wirusy
pierwotniaki
parazytologia
pasozyty
Opis:
The authors present the actual review on several publications concerning the molecular characterizations of the viruses found in parasitic protozoa such as Giardia, Trichomonas, Leishmania and Entamoeba histolytica. All of the RNA viruses observed in parasitic protozoa showed several similarities and did not considerably differ from the viruses found in simple eukaryotic cells; they closely correspond to dsRNA viruses of yeast. The supposition that the protozoan symbionts detected in laboratories transfer to their hosts in natural conditions seemed to be rational, though, there are no evidences that these symbionts are potential pathogens. However, the opinion reiterates that intestinal protozoa (e.g. Entamoeba histolytica) may serve as vectors for HIV or cofactors of HIV infection. The authors point out that irrespective of the potential role of viruses as vectors in the transfection system for parasitic protozoa, the observed viral system constitutes an unusual experimental system to solve the problems of gene expression.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 2; 131-137
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kryptosporydioza - parazytoza o typowym uwarunkowaniu środowiskowym
CRYPTOSPORIDIOSIS — A TYPICAL ENVIRONMENTAL PARASITOSIS
Autorzy:
Kasprzak, W.
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2149111.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
kryptosporydioza
choroby inwazyjne
pasozyty zwierzat
kryptosporidia
parazytologia
Cryptosporidium
pasozyty czlowieka
Opis:
The article reviews the problems on epidemiology of cryptosporidiosis and gives a detailed description of the massive waterborne outbreak in Milwaukee (Wisconsin, USA) associated with a break in filtration capacity of a public water supply. The authors emphasize the need for high-quality diagnostic procedures as current coprodiagnostic microscopical techniques seemed to fail to detect Cryptosporidium oocysts.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 2; 149-154
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatność metod analizy genomu w diagnostyce giardiozy i kryptosporydiozy
APPLICATION OF MOLECULAR BIOLOGY IN DIAGNOSIS OF GIARDIOSIS AND CRYPTOSPORIDIOSIS
Autorzy:
Kasprzak, W.
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/2151375.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
kryptosporydioza
choroby inwazyjne
parazytologia
genomy
diagnostyka
giardioza
metody analizy
Opis:
The article comprises a critical review on practical applications of molecular technology in parasitological diagnostics in a broad sense, also as a diagnosis of species and a method of epidemiological analysis. Techniques of genome analysis at different levels, as specific nucleic acid probes, DNA restriction profiles (RFLP), hybridization techniques, pulse-field gel electrophoresis, in vitro nucleic acid amplification, and DNA fingerprint technique used in studies on Giardia and Cryptosporidium were discussed. The essential reservation as far as this technology is concerned refers to its usefulness in parasitological diagnostics; there is no sense in working out methods for recognizing parasites which could otherwise be identified by well trained parasitologists and simple microscopic methods. The improved diagnosis of parasites resulting from the application of molecular technology significantly contributed to the armentarium of parasitologists. Application of recent molecular technology in diagnosis of giardiosis and cryptosporidiosis may basically support clinical diagnosis which provides possibilities of early and selective treatment and makes possible epidemiological studies. These assays will permit not only a rapid diagnosis and exact differentiation but will also enable a better recognition of Giardia and Cryptosporidium genome organization. However, in spite of the wide availability of this new techniques they have not been fully applied - as yet – in diagnosis and in epidemiological studies on these parasites. The authors share the opinion of BUSCH (1991) on the need of proper recognition of high-quality and rigorous work in employing new molecular assays, because their wide availability and high sensitivity could cause "false-positive" results by contamination with amplified DNA sequences. They totally support the conclusion made by THOMPSON and MELONI (1993) that the molecular data must be fairly interpreted by collaborating molecular biologists, parasitologists, and epidemiologists - and clinicians as well - to avoid forming of a confusing picture of genetic diversity of the parasites with no practical application.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 1; 3-11
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zaleznosc pomiedzy wystepowaniem zarazy ziemniaka w okresie wegetacji oraz zawartoscia azotanow [V] w bulwach ziemniaka po zbiorze
Autorzy:
Czajka, W
Zolnowski, A C
Powiązania:
https://bibliotekanauki.pl/articles/800413.pdf
Data publikacji:
2006
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
choroby roslin
zawartosc azotanow
zaraza ziemniaka
ziemniaki
bulwy
okres pozbiorczy
plant disease
nitrate content
late blight
potato
tuber
post-harvest period
Opis:
Prześledzono zależności pomiędzy zróżnicowanym nawożeniem NPK, zawartością azotanów(V) w bulwach ziemniaka a nasileniem występowania zarazy Phythophthora infestans na plantacji ziemniaka. Rozwój zarazy na roślinach w okresie wegetacji zależał od warunków klimatycznych i dawki nawożenia mineralnego. Najwyższe indeksy porażenia wystąpiły na odmianie Rywal przy dawce 160 kg N·ha⁻¹ (Ip = 63,6%) w zimnym i mokrym roku 2004. Najniższe porażenie patogenem zanotowano w 2003 roku na odmianie Tokaj nawożonej dawką 40 kg N·ha⁻¹ (Ip = 22,6%). Analizy bulw na zawartość NO₃⁻ wykazały ścisłą zależność ilości azotanów(V) od wzrastającej dawki nawożenia mineralnego. Bezpiecznym poziomem nawożenia NPK, przy którym nie stwierdzono przekroczenia dopuszczalnej normy 200 mg NO₃⁻·kg⁻¹ świeżej masy bulw, była dawka N₄₀P₁₇K₅₀. Wyższe dawki NPK sprzyjały nagromadzaniu NO₃⁻, szczególnie przez odmianę Tokaj. Stwierdzono istotny związek pomiędzy stopniem porażenia roślin w czasie wegetacji i zawartością NO₃⁻ w bulwach po zbiorze. Większą zawartością azota- nów(V) charakteryzowały się bulwy spod roślin w mniejszym stopniu porażanych przez Phytophthora infestans.
The aim of the presented study was to state the dependencies between different NPK fertilization, tuber nitrate content, and potato plant infestation by Phythophthora infestans during growing season. The development of infection depended on weather conditions and amount of mineral fertilizers. The highest infestation index (Ip = 63.6) was noted for Rywal cultivar fertilized with 160 kg N·ha⁻¹ in 2003 with cold and wet weather. The lowest infestation was noted in the year 2003 (Ip = 22.6%) for cultivar Tokaj fertilized with 40 kg N·ha⁻¹. The nitrates content in analyzed tuber samples depended on the elevated rates of NPK fertilization. The maximum level of nitrates for human consumption is 200 mg NO₃⁻·kg⁻¹ of fresh mass. During the presented study it was stated that only N₄₀P₁₇K₅₀ was acceptable for safe level of tuber nitrates. The higher rates of NPK caused a higher nitrates level especially in the cultivar Tokaj. A significant relation between the degree of plant infestation during vegetation and the NO₃⁻ content in tubers after harvest was observed. A higher NO₃⁻ amount noted in tubers derived from plants of a higher infected by pathogen Phythophthora infestans.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 513; 63-71
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Usage With Cold Hands; An Experiment With Pointing Devices
Autorzy:
Blomkvist, A. C.
Gard, G.
Powiązania:
https://bibliotekanauki.pl/articles/90201.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
cold hand
computer use
input device
movement analysis
acquisition time
cold climate
komputer
analiza ruchu
praca przy komputerze
Opis:
Computers are used in the outdoors and in connection with cold store work. Cold hand and fingers limit data input, as studied here. Six input devices; trackballs, pens, and a mouse were tested by 19 participants in a Fitts' target acquisition task with 2 target sizes under 2 experimental conditions; warm and cold right hand. Measures were acquisition times, number of errors, participant's preferences, and observed handling of the devices. Effects of device, target size, and cold were significant. Learning and attempts to improve handgrip were confirmed. Large enough targets, a thick pen, and a mouse make computer work practicable in the cold. Direct visual feedback, as with pen on template with target images, shortened acquisition times by half a second.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, 6, 4; 429-450
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maximization of an Asymmetric Utility Function by the Least Squares
Autorzy:
Yoneda, K.
Moretti, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/375999.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
individual behavior
inverse problems
simultaneous equations
optimization
Opis:
This note points out that a utility maximization procedure proposed in an earlier paper may be reduced to the least squares. The utility function is asymmetric in the sense that for each cue its ideal value and the permissible range are assigned in such a way that the ideal is not necessarily at the center of the range, like "a beer of 350 ml would be ideal, but acceptable if within [100, 500]". A practical consequence of the observation is that very little programming will be needed to deploy the utility maximization since software for the least squares is widely available.
Źródło:
Decision Making in Manufacturing and Services; 2014, 8, 1-2; 5-12
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zrodlo i znaczenie genetycznego zroznicowania populacji pasozytniczych pierwotniakow
Autorzy:
Majewska, A C
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/837049.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
zroznicowanie genetyczne
Leishmania
Giardia
struktura populacji
pierwotniaki
parazytologia
zroznicowanie gatunkowe
Toxoplasma
populacje zwierzat
pasozyty
Trypanosoma
Cryptosporidium
Opis:
The application of biochemical and molecular techniques in parasitological studies has provided increasing evidences of genetic polymorphism among parasite populations. This review presents possible origins of genetic variation within populations of various protozoan species. Since the mode of reproduction has an important influence on genetic polymorphism within parasite populations these considerations refer mainly to some protozoan parasites which have various life cycles, e.g. Giardia, Trypanosoma, Cryptosporidium, Toxoplasma. Also other factors associated with parasites (such as: transmission and passage history in laboratory conditions; occurrence in different hosts or geographic regions; selective pressure of drugs; competitive interactions between populations) that affect parasite genetic diversity are discussed. However, the number of examined isolates of parasites and genetic markers, assortment of methods, probes, primers and reagents used is also of significance. The significance of genetic variability in parasite populations is still the subject of much interest and controversy. A simple interpretation of such variation is impossible because of the complexity of host-parasite interactions. The knowledge of parasite diversity at the nucleic acids level has continually increased, but a corect interpretation of this phenomenon requires at least the same knowledge of genetic variability in host populations. Nevertheless, genetic variability in protozoan parasites has many important implications, e.g. for taxonomy, epidemiology, control and evolution. Genetic differences within parasite populations might also be associated with phenotypic variability, e.g. virulence, antigenicity, infectivity, drug sensitivity, hostpreference etc.
Źródło:
Annals of Parasitology; 1999, 45, 3; 293-307
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Source and significance of genetic polymorphism of selected parasitic Protozoa
Autorzy:
Majewska, A.C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/838111.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
polymorphism
control
Giardia
Trypanosoma
epidemiology
evolution
parasite population
Cryptosporidium
Protozoa
Toxoplasma
taxonomy
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wirusy pasozytniczych pierwotniakow
Autorzy:
Kasprzak, W
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/838835.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
wirusy
pierwotniaki
parazytologia
pasozyty
Opis:
The authors present the actual review on several publications concerning the molecular characterizations of the viruses found in parasitic protozoa such as Giardia, Trichomonas, Leishmania and Entamoeba histolytica. All of the RNA viruses observed in parasitic protozoa showed several similarities and did not considerably differ from the viruses found in simple eukaryotic cells; they closely correspond to dsRNA viruses of yeast. The supposition that the protozoan symbionts detected in laboratories transfer to their hosts in natural conditions seemed to be rational, though, there are no evidences that these symbionts are potential pathogens. However, the opinion reiterates that intestinal protozoa (e.g. Entamoeba histolytica) may serve as vectors for HIV or cofactors of HIV infection. The authors point out that irrespective of the potential role of viruses as vectors in the transfection system for parasitic protozoa, the observed viral system constitutes an unusual experimental system to solve the problems of gene expression.
Źródło:
Annals of Parasitology; 1995, 41, 2; 131-137
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kryptosporydioza - parazytoza o typowym uwarunkowaniu srodowiskowym
Autorzy:
Kasprzak, W
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/840071.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
kryptosporydioza
choroby inwazyjne
pasozyty zwierzat
kryptosporidia
parazytologia
Cryptosporidium
pasozyty czlowieka
Opis:
The article reviews the problems on epidemiology of cryptosporidiosis and gives a detailed description of the massive waterborne outbreak in Milwaukee (Wisconsin, USA) associated with a break in filtration capacity of a public water supply. The authors emphasize the need for high-quality diagnostic procedures as current coprodiagnostic microscopical techniques seemed to fail to detect Cryptosporidium oocysts.
Źródło:
Annals of Parasitology; 1995, 41, 2; 149-154
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie technik biologii molekularnej w parazytologii: za i przeciw
Autorzy:
Majewska, A C
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/840124.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parazytologia
techniki badawcze
techniki biologii molekularnej
diagnostyka
Opis:
This review deals with possible advantages and disadvantages connected with applying molecular biology techniques in parasitology. It particularly concerns molecular diagnosis and epidemiology, as well as phylogenesis and taxonomy of selected parasite species.
Źródło:
Annals of Parasitology; 1998, 44, 2; 181-194
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformational leadership and emotional intelligence of graduate managers
Autorzy:
Jayawardena, L. N. A. C.
Powiązania:
https://bibliotekanauki.pl/articles/407399.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transformational leadership
emotional intelligence
Graduate Managers
Opis:
Leadership of graduate managers has become a focal point of many employers worldwide. Leadership development is in high demand and leadership initiatives are an effective tool for career development in the corporate environment. The objectives of the study were to assess the Transformational Leadership (TL) and Emotional Intelligence (EI) level of graduate managers, and to analyse the relationship between their EI and TL performances at work. The role of gender in leadership was examined. Sixty three graduate managers (33 men, and 30 women) who are following the masters' degree programme were randomly selected from a Sri Lankan university. The Multifactor Leadership Questionnaire of Bass and Avolio, was used to assess the leadership style performances of the respondents. Genos EI Inventory was used to measure their EI level. Descriptive and inferential analyses of data were conducted using SPSS software. Respondents recorded higher scores for TL performances at work. Respondents' EI levels and TL styles re?ected a difference with regard to their gender. Respondents have scored slightly lower scores for the EI sub-constructs in comparison to the normative figures of Genos EI. The higher fluctuation of Mean values of respondents indicated the volatility of the reasoning ability of respondents. The fact that graduate managers depicted higher scores for progressive leadership styles and lower scores for passive leadership styles augurs well for their career development. Emotional Intelligence of men significantly related with their Transformational leadership style. Study concludes that high Transformational leadership of Sri Lankan graduates managers and manageresses, and the relationship of Transformational Leadership with managers EI as well, could enhance management and production performances in corporate environments.
Źródło:
Management and Production Engineering Review; 2012, 3, 3; 28-33
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Źródło i znaczenie genetycznego zróżnicowania populacji pasożytniczych pierwotniaków
SOURCE AND SIGNIFICANCE OF GENETIC POLYMORPHISM OF SELECTED PARASITIC PROTOZOA
Autorzy:
Majewska, A. C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/2148795.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
zroznicowanie genetyczne
Leishmania
Giardia
struktura populacji
pierwotniaki
parazytologia
zroznicowanie gatunkowe
Toxoplasma
populacje zwierzat
pasozyty
Trypanosoma
Cryptosporidium
Opis:
The application of biochemical and molecular techniques in parasitological studies has provided increasing evidences of genetic polymorphism among parasite populations. This review presents possible origins of genetic variation within populations of various protozoan species. Since the mode of reproduction has an important influence on genetic polymorphism within parasite populations these considerations refer mainly to some protozoan parasites which have various life cycles, e.g. Giardia, Trypanosoma, Cryptosporidium, Toxoplasma. Also other factors associated with parasites (such as: transmission and passage history in laboratory conditions; occurrence in different hosts or geographic regions; selective pressure of drugs; competitive interactions between populations) that affect parasite genetic diversity are discussed. However, the number of examined isolates of parasites and genetic markers, assortment of methods, probes, primers and reagents used is also of significance. The significance of genetic variability in parasite populations is still the subject of much interest and controversy. A simple interpretation of such variation is impossible because of the complexity of host-parasite interactions. The knowledge of parasite diversity at the nucleic acids level has continually increased, but a corect interpretation of this phenomenon requires at least the same knowledge of genetic variability in host populations. Nevertheless, genetic variability in protozoan parasites has many important implications, e.g. for taxonomy, epidemiology, control and evolution. Genetic differences within parasite populations might also be associated with phenotypic variability, e.g. virulence, antigenicity, infectivity, drug sensitivity, hostpreference etc.
Źródło:
Wiadomości Parazytologiczne; 1999, 45, 3; 293-307
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie technik biologii molekularnej w parazytologii: za i przeciw
APPLICATION OF MOLECULAR BIOLOGY TECHNIQUES IN PARASITOLOGY: FOR AND AGAINST
Autorzy:
Majewska, A. C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/2148868.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parazytologia
techniki badawcze
techniki biologii molekularnej
diagnostyka
Opis:
This review deals with possible advantages and disadvantages connected with applying molecular biology techniques in parasitology. It particularly concerns molecular diagnosis and epidemiology, as well as phylogenesis and taxonomy of selected parasite species.
Źródło:
Wiadomości Parazytologiczne; 1998, 44, 2; 181-194
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wodnopochodne epidemie Giardia
WATERBORNE OUTBREAKS OF GIARDIA
Autorzy:
Majewska, A. C.
Kasprzak, W.
Powiązania:
https://bibliotekanauki.pl/articles/2151382.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
lamblia
Giardia
epidemie
parazytologia
pasozyty
epidemiologia
Opis:
The authors present the actual informations on waterborne outbreaks of giardiosis as well as the evidences of Giardia cyst transmission by municipal water supply. In the article a recommendation is given to molecular biology techniques which contributed to the armentarium applied in the modern diagnostics of giardiosis.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 1; 25-31
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efektywność metod określania żywotności cyst Giardia
Efficacy of methods assessing the viability of Giardia cysts
Ehffektivnost' metodov opredelenija vital'nosti cist Giardia
Autorzy:
Kasprzak, W.
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/2152702.pdf
Data publikacji:
1987
Wydawca:
Polskie Towarzystwo Parazytologiczne
Źródło:
Wiadomości Parazytologiczne; 1987, 33, 2; 147-156
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximation of Large-Scale Dynamical Systems: an Overview
Autorzy:
Antoulas, A. C.
Sorensen, D. C.
Powiązania:
https://bibliotekanauki.pl/articles/908058.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
aproksymacja
system dynamiczny
model reduction
SVD
Hankel
balancing
Krylov
Opis:
In this paper we review the state of affairs in the area of approximation of large-scale systems. We distinguish three basic categories, namely the {SVD}-based, the {Krylov}-based and the {SVD-Krylov}-based approximation methods. The first two were developed independently of each other and have distinct sets of attributes and drawbacks. The third approach seeks to combine the best attributes of the first two.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2001, 11, 5; 1093-1121
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Case study of safe working conditions in spanish merchant ships
Autorzy:
Orosa, J. A.
Oliveira, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/259013.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
case study
safety assessment
ships
engine room
Opis:
This paper aims to show a practical case study of safety assessment concerning possible injuries and fire occurring in the engine room on-board a merchant ship, due to fatigue. Methods The methodology was centred in literature hazard identification, measurements in real ships and heat stress indices definition. Results Some corrections are proposed in order to obtain a safe environment for workers in the engine control room and to prevent fatigue risks at the engine room. This will allow adequate oil leakage detection and, as a consequence, improve fire prevention. Discussion Training is a preventive control option, but this study allows the understanding of new corrective control options like design corrections.
Źródło:
Polish Maritime Research; 2012, 2; 43-48
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite Different Analysis of Free Convection Flow and Heat Transfer of Casson Nanofluid over a Vertical Plate under the Influence of Thermal Radiation
Autorzy:
Sobamowo, M. G.
Okolie, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/1193438.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Casson fluid
Free convection
Nanoparticle
Numerical solutions
Prandtl number
Thermal radiation
Opis:
In this paper, a numerical study on free convection flow and heat transfer of Casson nanofluids over a vertical plate under the influence of thermal radiation is carried out. The governing systems of coupled nonlinear partial differential equations of the flow and heat transfer processes are converted to a system of coupled nonlinear ordinary differential equations through suitable similarity variables. The obtained ordinary differential equations are solved using finite difference method. The results of the numerical solutions are compared with the results of past works as presented in literature and good agreement was established. Also, the effects of thermal radiation; Prandtl number, nanoparticles volume-fraction, shape and type on the flow and heat transfer behaviour of various nanofluids over the flat plate are investigated. The results show that the magnitude of velocity near the plate for the Casson nanofluid parameter decreases for increasing value of the Casson parameter, while temperature increases for increase in Casson fluid parameter. Also, the thermal radiation and volume-fraction of the nanoparticles in the base fluid increase, the velocity, temperature, viscous and thermal boundary layers of the nanofluid increase. However, the velocity of the nanofluid decreases as the Prandtl number increases while the temperature of the nanofluid increases as the Prandtl number increases. The velocity of the nanofluid decreases as the volume-fraction or concentration of the nanoparticle in the base fluid increases. The study can benefit the design engineers enhancing their understanding of the phenomenon for various industrial and engineering applications.
Źródło:
World Scientific News; 2021, 157; 38-66
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From palaeosols to carbonate mounds: facies and environments of the middle Frasnian platform in Belgium
Autorzy:
Silva da, A. C.
Boulvain, F.
Powiązania:
https://bibliotekanauki.pl/articles/2058840.pdf
Data publikacji:
2004
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Belgium
middle Frasnian
carbonate platform
palaeogeography
facies
carbonate mounds
Opis:
This paper provides a synthetic sedimentological overview of themiddle Frasnian carbonate platform of Belgium and associated carbonate mounds. Carbonate mounds started usually in a relatively deep, quiet subphotic environment with a crinoid-coral-sponge assemblage, then reached the fair-weather wave base and the euphotic zone with an algal-microbial facies. The upper parts of themounds are characterised by lateral facies differentiation with the algal-microbial facies protecting a central sedimentation area with a dendroid stromatoporoids facies and fenestral limestone. The lateral facies reflect different kinds of input of reworked mound material in the proximal area, from transported fine-grained sediment to coarse-grained fossil debris. On the platform, environments range from the outer zone (crinoidal facies) to stromatoporoid-dominated biostromes and to the lagoonal area of the inner zones (subtidal facies with Amphipora floatstone, algal packstone, intertidal mudstone and laminated peloidal packstone and palaeosols). These facies are stacked in metre-scale shallowing-upward cycles. The larger scale sequential organisation corresponds to transgressions and regressions, whose cycles are responsible for differentiating a lower open-marine biostrome dominated unit from an upper lagoonal unit. The last regression- transgression cycle, responsible for the platform-scale development of lagoonal facies, can be correlated with an atoll-stage evolution of the carbonate mounds belonging to the Lion Member.
Źródło:
Geological Quarterly; 2004, 48, 3; 253--266
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of diatom and dinoflagellate cell volumes from surface waters of the Northern Indian Ocean
Autorzy:
Chitari, R.R.
Anil, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/47851.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
diatom
dinoflagellate
cell size
surface water
microphytoplankton
seasonal variation
spatial variation
Indian Ocean
Bengal Bay
Arabian Sea
Opis:
Phytoplankton samples collected from the Northern Indian Ocean (Bay of Bengal, northern Arabian Sea, and Dona Paula Bay Goa, west coast of India), were utilized to quantify changes in cell size, cell volume and carbon per cell of diatoms and dinoflagellates. The dataset from the Bay of Bengal also provides inter- and intra-annual variations (April 2008 to March 2010). The variations in cell size and volume were large in regions influenced by the riverine influx or terrigenous inputs. An interregional comparison of commonly available forms (8 species) points out that cell volumes are highest in the North Atlantic and lowest in the Mediterranean. The information provided will be useful in estimation of carbon biomass and biogeochemical studies.
Źródło:
Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergent evolution of two Silurian graptolites
Autorzy:
Lenz, A C
Melchin, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/21551.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
taxonomy
biostratigraphy
paleontology
Graptoloidea
nomenclature
graptolite species
convergent evolution
Cochlograptus veles
Testograptus testis
Silurian graptolite
Monograptidae
Opis:
The two graptolite speciesCochlograptus veles(Telychian, Upper Llandovery) and Testograptus testis(lower Homerian, upper Wenlock) are remarkably and uniquely similar in being strongly ventrally and planispirally coiled and in demonstrating an abrupt deflection in the immediate post−sicular regions of their rhabdosomes. The two species, however, are separated by a relatively large biostratigraphic gap and a global mass extinction, and they differ morphologically in the proportion of thecal overlap, different angles of inclination of the interthecal septa, relative proportions of the widths occupied by the free metathecae, the position of the sharp dorsal flexure relative to the tip of the sicula, and the presence of a distinctive, keel−like structure on T. testis. It is suggested therefore, that in spite of the strong proximal morphological parallelism between the two species, their origin is best explained as a remarkable example of convergent evolution. It is suggested that C. veles perhaps evolved from some modified monograptid such as Stimulograptus, whereas the small Testograptus group may have derived from some monograptid such as Monograptus flemingii. Cladistic analysis fully supports the independent derivation the two species. If correct, this hypothesis supports the validity of separate generic names for the two species, despite the close and unique rhabdosomal similarities, including proximal metathecal form.
Źródło:
Acta Palaeontologica Polonica; 2008, 53, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The heat equation on time scales
Autorzy:
Cuchta, Tom
Ferreira, Rui A. C.
Powiązania:
https://bibliotekanauki.pl/articles/29519378.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
heat equation
time scales
Fourier transform
Opis:
We present the use of a Fourier transform on time scales to solve a dynamic heat IVP. This is done by inverting a certain exponential function via contour integral. We include some specific examples and directions for further study.
Źródło:
Opuscula Mathematica; 2023, 43, 4; 475-491
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Cryptography with Macroscopic Photon-Number-Correlated Light
Autorzy:
Raymer, M. G.
Funk, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2030477.pdf
Data publikacji:
2002-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.67.Dd
03.67.Hk
42.50.Dv
42.50.Lc
Opis:
We describe a new scheme for performing quantum key distribution. We present two physical implementations for the quantum key distribution system. The first implementation uses a type-II optical-parametric amplifier to generate the optical pulses which contain the key information. The second implementation uses correlated semiconductor emitters to generate the optical pulses.
Źródło:
Acta Physica Polonica A; 2002, 101, 3; 437-448
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modelling of oil spill in New York Bay
Autorzy:
Toz, A. C.
Koseoglu, B.
Sakar, C.
Powiązania:
https://bibliotekanauki.pl/articles/205140.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
New York Bay
ADIOS
automated data inquiry for oil spills
GNOME
general NOAA operational modeling environment
numerical modelling
oil spill
Opis:
New York Bay is one of the most important transition regions of ships trading to east America. The region plays an important role in the commerce of the New York metropolitan area. The area is surrounded with the coasts that have various levels of environmental sensitivity. The area accommodates high diversity of native ecosystems and species that are rather vulnerable in case of oil spill. Thus getting well informed about the likelihood, or fate, of oil spills around this region is of great importance so that proactive measures can be taken. The purpose of this study is to investigate the oil spill and predict the future accidents likely to be encountered around the Bay of New York. Two trajectory models have been conducted for the study. ADIOS (Automated Data Inquiry for Oil Spills), has been conducted for natural degradation calculations, and, GNOME (General NOAA Operational Modeling Environment), has been conducted for surface spread simulation. The results gained through these efforts are hoped to be useful for many organizations dealing with oil spill response operations and contribute to an effective and efficient coordination among the relevant institutions.
Źródło:
Archives of Environmental Protection; 2016, 42, 4; 22-31
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maritime students’ use and perspectives of cloud-based desktop simulators: CSCL and implications for educational design
Autorzy:
Gyldensten, W.
Wiig, A. C.
Sellberg, C.
Powiązania:
https://bibliotekanauki.pl/articles/24201443.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
maritime education and training
ethnographic study
navigational simulator
collaborative learning
maritime navigation cloud
students approaches to learning
maritime students
new learning methods
Opis:
This study investigates the challenges and opportunities of using cloud-based simulators for training in maritime education and training (MET). The aim is to map bachelor students’ use and perspectives to inform educational design when implementing cloud simulation into the curricula. This study uses an ethnographic design approach in the tradition of Computer Supported Collaborative Learning (CSCL) and draws on video-recorded exercises and interviews (n=22) from 1st and 3rd-class maritime bachelor’s students engaged in navigation exercises on cloud simulation. The findings suggest that individual training with cloud-based simulators in MET can enhance the repetition of skills necessary for better performance in a full-mission simulator with current technology and rather straightforward instructional designs. However, the findings also emphasise that simulator exercises need to be more engaging for students in order to provide a meaningful learning experience. Hence, simulator software needs to provide the means for students to collaborate during exercises, and feedback provided by the system needs to be carefully aligned with the student’s previous knowledge in order to provide adequate scaffolding.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 315--321
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genotypowanie izolatow Giardia duodenalis uzyskanych od ludzi w zachodnio-centralnej Polsce
Genotype analysis of Giardia duodenalis isolated obtained from humans in West-central Poland
Autorzy:
Solarczyk, P
Werner, A.
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/838606.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Giardia duodenalis
genotypowanie
genotyp
pasozyty jelitowe
pasozyty czlowieka
Polska Srodkowo-Zachodnia
Źródło:
Annals of Parasitology; 2010, 56, 2; 171-177
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of cryptosporidiosis in livestock in Wielkopolska Region
Autorzy:
Majewska, A.C.
Werner, A.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/840450.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
prevalence
cryptosporidiosis
Polska
economic loss
cryptosporidial infection
farm animal
Cryptosporidium
Wielkopolska region
livestock
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of different techniques in the diagnosis of cryptosporidiosis in human and animals
Autorzy:
Werner, A.
Majewska, A.C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/840659.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
cryptosporidiosis
man
diagnosis
animal
Cryptosporidium
oocyst
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predictors of sick leave owing to neck or low back pain: a 12-year longitudinal cohort study in a rural male population
Autorzy:
Holmberg, S A C
Thelin, A.G.
Powiązania:
https://bibliotekanauki.pl/articles/50130.pdf
Data publikacji:
2010
Wydawca:
Instytut Medycyny Wsi
Tematy:
low back pain
neck pain
farming
sick leave
life style
self-employment
male
rural population
public health
risk
diagnosis
risk factor
Źródło:
Annals of Agricultural and Environmental Medicine; 2010, 17, 2; 251-257
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prienenie metoda immunologicheskogo obsledovanija naselenija dlja izuchenija trikhinelleza na Chukotke. II. Sravnitel'nye danye po chuvstvitel'nosti serologicheskikh reakcijj
Zastosowanie metod immunologicznych do badań nad włośnicą mieszkańców Czuchotki. II. Dane porównawcze nad wrażliwością odczynów serologicznych
The use of immunological ssurvey method of Chukotka population for trichinellosis studies. II. Comparative data on the sensibility of serological reactions
Autorzy:
Bessonov, A.C.
Vol'fson, A.G.
Powiązania:
https://bibliotekanauki.pl/articles/2177553.pdf
Data publikacji:
1970
Wydawca:
Polskie Towarzystwo Parazytologiczne
Źródło:
Wiadomości Parazytologiczne; 1970, 16, 1; 24-33
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genotypowanie izolatów Giardia duodenalis uzyskanych od ludzi w zachodnio-centralnej Polsce
Genotype analysis of Giardia duodenalis isolated obtained from humans in West-central Poland
Autorzy:
Solarczyk, P.
Werner, A.
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/2143436.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Giardia duodenalis
genotypowanie
genotyp
pasozyty jelitowe
pasozyty czlowieka
Polska Srodkowo-Zachodnia
Opis:
Giardia duodenalis (syn. G. intestinalis, G. lamblia) is a cosmopolitan flagellate organism belonging to the most common intestinal protozoan parasites of humans and animals. Great genetic heterogeneity has been found within G. duodenalis, where only genotypes representing assemblages A and B have zoonotic potential. Fecal samples (447 specimens) obtained from 232 humans in West-central region of Poland were examined by microscopy and PCR. The total prevalence of Giardia in humans was 1.3%. DNA was extracted from three positive fecal samples and PCR products were obtained after amplification using the β-giardin primers G7 and G759. Sequence and phylogenetic analyses showed that G. duodenalis isolates from humans belonged to A and B genotypes. Moreover, three subgenotypes, including a cosmopolitan subgenotype A2 and two new subgenotypes A and B were detected.
Źródło:
Wiadomości Parazytologiczne; 2010, 56, 2; 171-177
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tithonian stratigraphy and ammonite fauna of the Vaca Muerta Formation in Mallín Quemado (Neuquén Basin, Argentina), with remarks on the Andean chronostratigraphy
Autorzy:
Garrido, A. C.
Parent, H
Brambilla, L.
Powiązania:
https://bibliotekanauki.pl/articles/2060958.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ammonites
Tithonian
Vaca Muerta Formation
chronostratigraphy
Mallín Quemado
ammonite bio-horizons
Neuquen Basin
amonity
tyton
Formacja Vaca Muerta
chronostratygrafia
Opis:
In the Cerro Mallín Quemado area (Sierra de la Vaca Muerta) the three members of the Vaca Muerta Formation (Portada Covunco, Los Catutos and Pichi Moncol) can be recognized, including the whole of the Tithonian rock-record. The ammonite fauna does not show significant differences with respect to that of the nearby locality Pampa Tril, but the record of faunal horizons is patchier. Eighteen species of ammonites were recorded through the studied sections, covering the whole of the Andean Tithonian. The current chronostratigraphic zonation of the Andean Tithonian is briefly discussed, updated and correlated with the most recent literature. From the current succession of ammonite bio-horizons previously defined in the basin, only three (picunleufuense alpha, picunleufuense beta and falculatum) were recognized definitely. Four other bio-horizons (perlaevis, erinoides, internispinosum alpha and vetustum) were recognized only tentatively, because the typical assemblages of morphotypes (morpho-species) were not clearly or completely recognized. The current regional time-correlation chart dated by the ammonite bio-horizons of the Neuquén Basin along a 70°W transect is updated with the results of the present study and additional information recently obtained from other localities
Źródło:
Volumina Jurassica; 2018, 16, 1; 1--26
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of phenolic compounds in soils originating from two long-term fertilization experiments
Zawartość związków fenolowych w glebach pochodzących z dwóch trwałych doświadczeń nawozowych
Autorzy:
Sądej, W.
Żołnowski, A. C.
Marczuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/204662.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phenolic compounds
soil
long-term experiments
fertilization
FYM
slurry
związki fenolowe
gleba
eksperyment długoterminowy
nawożenie
obornik
nawóz mineralny
NPK
Opis:
The objective of the study was to compare the impact of three systems of multiannual fertilization applied in two long-term field experiments on the content of phenolic compounds in the soil. In the study, both natural (manure, slurry) and mineral (NPK) fertilizers were used, along with combined, organic-and-mineral fertilization. Experiment I was established in 1972 on grey brown podzolic soil; experiment II, in 1973 on brown soil. In both experiments crops were cultivated in a 7-year rotation, with a 75% share of cereals. The experimental samples were taken from the top layer of soil after 36 (experiment I) and 35 (experiment II) years following the establishment of the experiments. It was demonstrated that the presence of phenolic compounds in the soils was significantly dependent on the contents of organic C and total N, type of soil and the type and dose of used fertilizers. In grey brown podzolic soil, the content of total phenolic compounds was at a lower level than the content found in brown soil. Multiannual fertilization contributed to an increase in the content of total phenolic compounds in relation to the values obtained in control objects, which was particularly reflected in the soil originating from objects fertilized with slurry applied at a dose being equivalent to manure in terms of the amount of introduced organic carbon. The percentage of water-soluble phenols in the total content of these compounds in grey brown podzolic soil was at the level of 18.4%, while in brown soil it amounted to 29.1%.
Związki fenolowe to grupa substancji biologicznie aktywnych, pochodząca najczęściej z naturalnych przemian substancji organicznej bądź z biosyntezy prowadzonej przez mikroorganizmy. Istota działania tych związków w glebie polega na zaburzaniu przemian metabolicznych w roślinie, co powoduje zahamowanie ich wzrostu i obniżenie plonowania. Celem pracy było porównanie wpływu trzech systemów wieloletniego nawożenia stosowanego w dwóch trwałych doświadczeniach polowych na zawartość związków fenolowych w glebie. W badaniach stosowano nawozy naturalne (obornik, gnojowica), mineralne (NPK) oraz nawożenie łączne organiczno-mineralne. Doświadczenie I założono w 1972 r. na glebie płowej, natomiast doświadczenie II w 1973 r. na glebie brunatnej. W obu doświadczeniach rośliny uprawiano w 7-letnim zmianowaniu, z 75% udziałem zbóż. Materiał do badań stanowiły próbki pobrane z wierzchniej warstwy gleby po 36 (doświadczenie I) i 35 (doświadczenie II) latach od chwili założenia doświadczeń. Wykazano, że obecność związków fenolowych w glebach była istotnie uzależniona od zawartości C organicznego oraz N ogółem. Na ich zawartość istotny wpływ miał rodzaj gleby oraz rodzaj i dawka stosowanych nawozów. W glebie płowej średnia zawartość związków fenolowych ogółem kształtowała się na poziomie niższym w stosunku do zawartości stwierdzanych w glebie brunatnej. Wieloletnie nawożenie wpłynęło na wzrost zawartości związków fenolowych ogółem w stosunku do wartości uzyskanych w obiektach kontrolnych, co szczególnie uwidoczniło się w glebie pochodzącej z obiektów nawożonych gnojowicą, stosowaną w dawce równoważonej z obornikiem pod względem ilości wprowadzanego węgla organicznego. Udział form fenoli rozpuszczalnych w wodzie w ogólnej zawartości tych związków w glebie płowej kształtował się średnio na poziomie 18.4%, zaś w glebie brunatnej 29.1%.
Źródło:
Archives of Environmental Protection; 2016, 42, 4; 104-113
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oddzialywanie surowych sciekow z zakladu przetworstwa owocow i warzyw na plonowanie i sklad chemiczny runi lakowej
Autorzy:
Ciecko, Z
Zolnowski, A C
Lopienski, W
Powiązania:
https://bibliotekanauki.pl/articles/807926.pdf
Data publikacji:
2006
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
sklad chemiczny
scieki surowe
plonowanie
nawozenie
scieki produkcyjne
run lakowa
chemical composition
raw sewage
yielding
fertilization
industrial sewage
meadow sward
Opis:
Paper dealt with an analysis of crude sewage from a fruit and vegetable processing plant in terms of macronutrient content and effect on the yield and chemical composition of meadow vegetation. Among five determined fertilizer components, the sewage was characterized by the highest content of nitrogen (0.112%), followed by potassium (0.062% K) and phosphorus (0.009% P). Under conditions of heavy soil cultivation, the rate of 60 m³ and 40 m³·ha⁻¹ (residual effect) showed the most favorable impact on hay yield in the first and second year of study, respectively. The respective increase of hay yield in these treatments reached 28 and 43%. Higher sewage rates contributed to substantial decrease in hay yield, especially in the first year. As for the chemical composition of meadow vegetation, the sewage rate of 20 to 80 m³·ha⁻¹ considerably increased of total nitrogen content, but only in the first year of study, i.e. immediately after application.
Praca dotyczy oceny surowych ścieków pochodzących z przetwórstw owoców i warzyw pod względem zawartości makroskładników oraz wpływu na plonowanie i skład chemiczny roślinności łąkowej. Rozpatrywane ścieki z pięciu badanych składników nawozowych najwięcej zawierały azotu (0,112%), a następnie potasu (0,062% K) i fosforu (0,009% P). W warunkach gleby ciężkiej najkorzystniej na plon siana w I roku badań działała dawka 60 m³, a w drugim roku (wpływ następczy) dawka 40 m³·ha⁻¹. Zwyżka plonu siana w tych obiektach odpowiednio wyniosła 28 i 43%. Większe dawki ścieków spowodowały duży spadek plonu siana, szczególnie w I roku badań. W składzie chemicznym runi łąkowej zastosowane ścieki, w dawkach od 20 do 80 m³·ha⁻¹, przyczyniły się do znacznego wzrostu zawartości N ogółem, ale tylko w I roku badań, to jest po bezpośrednim ich zastosowaniu.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 512, 1; 71-77
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical fault detection in rotating electrical machines using MCSA-FFT and MCSA-DWT techniques
Autorzy:
Bessous, N.
Sbaa, S.
Megherbi, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/200283.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
motor current signature analysis
MCSA
discrete wavelet transform
DWT
rolling element bearing faults
rotor eccentricity
stator current spectrum
dyskretna transformata falkowa
uszkodzenia łożysk tocznych
widmo prądu stojana
Opis:
This paper presents mechanical fault detection in squirrel cage induction motors (SCIMs) by means of two recent techniques. More precisely, we have analyzed the rolling element bearing (REB) faults in SCIM. Rolling element bearing faults constitute a major problem among different faults which cause catastrophic damage to rotating machinery. Thus early detection of REB faults in SCIMs is of crucial importance. Vibration analysis is among the key concepts for mechanical vibrations of rotating electrical machines. Today, there is massive competition between researchers in the diagnosis field. They all have as their aim to replace the vibration analysis technique. Among them, stator current analysis has become one of the most important subjects in the fault detection field. Motor current signature analysis (MCSA) has become popular for detection and localization of numerous faults. It is generally based on fast Fourier transform (FFT) of the stator current signal. We have detailed the analysis by means of MCSA-FFT, which is based on the stator current spectrum. Another goal in this work is the use of the discrete wavelet transform (DWT) technique in order to detect REB faults. In addition, a new indicator based on the MCSA-DWT technique has been developed in this study. This new indicator has the advantage of expressing itself in the quantity and quality form. The acquisition data are presented and a comparative study is carried out between these recent techniques in order to ensure a final decision. The proposed subject is examined experimentally using a 3 kW squirrel cage induction motor test bed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 571-582
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wplyw nawozenia NPK stosowanego w uprawie ziemniaka na zawartosc N-NO3 oraz N-NH4 w glebie
Autorzy:
Ciecko, Z
Zolnowski, A C
Krajewski, W
Powiązania:
https://bibliotekanauki.pl/articles/803233.pdf
Data publikacji:
2006
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
zawartosc azotu mineralnego
gleby
ziemniaki
uprawa roslin
azot amonowy
azot azotanowy
nawozenie mineralne
mineral nitrogen content
soil
potato
plant cultivation
ammonia nitrogen
nitrate nitrogen
mineral fertilization
Opis:
W pracy przedstawiono badania dotyczące wpływu zróżnicowanego nawożenia NPK stosowanego w uprawie trzech odmian ziemniaka oraz występujących w tym okresie opadów atmosferycznych na kształtowanie się zawartości mineralnych form azotu w glebie. Badania oparto na doświadczeniu polowym II czynnikowym obejmującym trzy poziomy nawożenia NP oraz trzy odmiany ziemniaka - Muza, Oda i Orłan. W obrębie każdego poziomu nawożenia NP zastosowano proporcjonalnie do N i P wzrastające dawki potasu w stosunku równym 0, 1, 2 i 3. W czasie wegetacji z poletek doświadczalnych siedmiokrotnie pobierano glebę do badań. Oznaczoną zawartość formy amonowej i azotanowej przeliczono na suchą masę gleby. W czasie wegetacji równolegle mierzono ilość opadów, których sumy za badane 15-dniowe okresy wykorzystano do obliczenia współczynników korelacji z wybranymi parametrami. Zawartość form azotu mineralnego w glebie w warunkach polowych ulegała silnej fluktuacji. Szczególnie dotyczyło to formy azotanowej N-NO₃, której ilość silnie rosła na skutek zwiększenia uwilgotnienia gleby. W znacznie mniejszym stopniu uwilgotnienie wpływało na zawartość formy N-NH₄, niemniej jednak to właśnie ta forma w istotny sposób wpłynęła na kształtowanie się plonu bulw ziemniaka. Wyższy i istotny współczynnik korelacji stwierdzono porównując wielkość plonu z zawartością N- NH₄ (r = 0,46*) niż z zawartością N- NO₃ (r = 0,31 n.ist.). Nie stwierdzono istotnej zależności pomiędzy udziałem potasu w dawce nawozowej a kształtowaniem się zawartości azotu azotanowego i amonowego w glebie w odniesieniu do trzech uprawianych odmian ziemniaka.
In the presented trials the effects of different NPK fertilization and precipitation during the growing season on the nitrates and ammonia content in soil under potato cultivation were analysed. As a first experimental factor three series of NPK fertilization were tested. The second experimental factor was three cultivars of potatoes - Muza, Oda i Orłan. Within the range of each NP fertilization level the increasing rates of potassium to N and P in the proportion of 0, 1, 2 and 3 were used. Soil samples were collected seven times per growing season. The determined amounts of N forms were calculated using a dry mass of soil. During the vegetation 15 day intervals the precipitations were noted. The nitrate content in the field conditions highly depended on rainfalls. Especially the amount of N- NO₃ form was elevated under a higher soil moisture. A much lower influence of soil moisture was noted in the case of N- NH₄ form. But that N form significantly shaped a potato tuber yield. The correlation coefficient noted by comparing the tuber yield and N- NH₄ (r = 0.46*) content was higher and significant, than the amount of N- NO₃ (r = 0.31 not significant). We did hot observe a significant dependence between the potassium dose in NPK rate and nitrates and ammonium nitrogen content in soil under potato plant cultivation.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 513; 55-62
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecomorphology and bone microstructure of Proterochampsia from the Chanares Formation
Autorzy:
Arcucci, A.
Previtera, E.
Mancuso, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/21349.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Proterochampsians are a South American endemic group of non-archosaurian archosauriforms with morphological characteristics recollecting Recent crocodilians, and therefore have been proposed as aquatic species. However, this has not been based on careful examination of anatomical and histological features. We provide a review of the morphological and histological evidence present in the skeleton of proterochampsids and discuss its implications for inferring the lifestyles of these organisms. Anatomical features such as a secondary palate, marginal dentition, palatine teeth, morphology of the tail, limb modification, and dermal armor are reviewed, and details of histological structures are described based on bone thin sections. Histological examination reveals a predominance of fibrolamellar bone tissue, suggesting rapid periosteal osteogenesis and therefore overall fast bone growth. The existence of discontinuities (LAGs) demonstrates that these animals responded to changes in their environment. Ecomorphological features do not provide definitive evidence for the lifestyles of proterochampsids, but allow us to propose a terrestrial/amphibious condition. The same is true of the histological features, particularly compactness of the bone.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of intestinal amoebae and flagellates in animals of the Zoological Garden in Poznan
Autorzy:
Majewska, A.C.
Kasprzak, W.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/837562.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
flagellate
prevalence
Poznan Zoological Garden
zoological garden
Polska
intestinal amoeba
amoeba
animal
parasitic infection
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of intestinal amoebae in livestock
Autorzy:
Majewska, A.C.
Werner, A.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/838666.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
Entamoeba polecki
prevalence
Lodamoeba butschlii
intestinal amoeba
amoeba
epidemiology
livestock
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena uzytecznosci metod wykrywania Cryptosporidium w kale ludzi i zwierzat
Autorzy:
Werner, A.
Sulima, P.
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/841199.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
ocena przydatnosci
kal
metody wykrywania
zwierzeta
Cryptosporidium
czlowiek
Źródło:
Annals of Parasitology; 2004, 50, 2; 209-220
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena użyteczności metod wykrywania Cryptosporidium w kale ludzi i zwierząt
Evaluation of usefulness of different methods for detection of Cryptosporidium in human and animal stool samples
Autorzy:
Werner, A.
Sulima, P.
Majewska, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/2146455.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
ocena przydatnosci
kal
metody wykrywania
zwierzeta
Cryptosporidium
czlowiek
Opis:
There are many methods for detection of Cryptosporidium oocysts. Most of them (more than 20) enable the microscopic detection of Cryptosporidium oocysts in faecal smears. Such a great variability of diagnostic methods may lead to confusion as far as the choice of an appropriate technique by a given laboratory is concerned. This study evaluated the diagnostic usefulness of Cryptosporidium oocysts and coproantigen detection methods in the diagnosis of cryptosporidiosis in human (266 stool specimen) and animals (205 from cattle, 160 from sheep, 30 from horses, 80 from cats, 227 from dogs and 11 from wild animals). The total number of human and animal stool specimens processed was 266 and 713, respectively. In this study the usefulness of several diagnostic methods was compared. The following techniques were taken into account: wet mounts, hematoxylin staining, four different specific methods (modified Zeihl-Neelsen, Kinyoun's, safraninmethylene blue, as well as carbol-methyl violet and tartrazyne) and commercially available kit based on enzyme-linked immunoassay (ProspecT(r) Cryptosporidium Microplate Assay). The final number of positive specimens was 123. Out of them 77 were positive in all specific methods. The oocysts found in stool specimens were measured. Humans were infected with C. parvum and animals with C. parvum, C. andersoni or C. felis. The statistical analysis has shown that EIA test was a better than microscopy method for identification of Cryptosporidium in faecal samples in human and wild animal. Sensitivity and specificity are important factors for the choice of a proper diagnostic method for Cryptosporidium detection, however other factors such as cost, simplicity and ease of interpretation of results are also important considerations.
Źródło:
Wiadomości Parazytologiczne; 2004, 50, 2; 209-220
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimum site selection for oil spill response center in the Marmara Sea using the AHP-TOPSIS method
Autorzy:
Koseoglu, B.
Buber, M.
Toz, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/205446.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oil spill
MCDM
multi-criteria decision-making
Marmara Sea
AHP-TOPSIS
Response Center
Opis:
The aim of this study is to determine the optimum location for an oil spill response center in the Marmara Sea. The analytic hierarchy process (AHP) and technique for the order of preference by similarity to ideal solution (TOPSIS) method as the most preferred multi-criteria decision-making (MCDM) technique were used. The results reveal that the LOC criterion and PRA sub-criterion have the highest effects on the optimal location selection of the oil spill response center. According to the results, the most suitable location for the oil spill response center in the region is Izmit Bay Entrance. This location has been proposed for the response headquarters to manage the whole operation with the assistance of auxiliary installations in the area. In this study, only technical and operational variables are taken into account, but political and administrative criteria are excluded.
Źródło:
Archives of Environmental Protection; 2018, 44, 4; 38-49
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production Control in the Company
Autorzy:
Dźwigoł, H.
Firlej, L.
Muntean, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2064997.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
production controlling
classification of controlling
tasks of production controlling
Opis:
The aim of the article is to get to know the essence of production control in the activity of enterprises. This background presents: the role of control in the enterprise and its classification with particular emphasis on production control. Production control plays an important role in the proper course of the production process. On the one hand, it comes down to the preparation of production plans, creating cost budgets for the company's production parts, and on the other hand to control their implementation. In the scope of production control, economic control of production is taken into account, defined as a direct and indirect impact on the shape of the assortment- and quantity-related structure of production and its course in time and space to ensure, in the given circumstances, the best achievement of the organization's goals. Production control may refer to strategic planning, where the most important is to strike a balance between the flexibility of using production means and workforce, availability of technology and substitute technologies or operational planning, where the key task is to find and eliminate bottlenecks occurring in the production process.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 475--481
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of technology for obtaining water-soluble bacterial melanin and determination of some of pigment properties
Autorzy:
Aghajanyan, A.E.
Vardanyan, A.A.
Hovsepyan, A.C.
Hambardzumyan, A.A.
Filipenia, V.
Saghyan, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/80261.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
melanin
fermentation process
aeration
process optimization
sorption
dilution
pigment property
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 4
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of fluctuating patterns: from informatics to dynamic structure of two-dimensional liquids
Rozpoznawanie fluktuujących wzorców struktury: od informatyki do dynamicznej struktury dwuwymiarowych cieczy
Autorzy:
Mituś, A. C.
Orlik, R.
Patashinski, A. Z.
Powiązania:
https://bibliotekanauki.pl/articles/137210.pdf
Data publikacji:
2012
Wydawca:
Uczelnia Jana Wyżykowskiego
Tematy:
ciecze dwuwymiarowe
rozpoznawanie wzorców
wzorce fluktuujące
klaster SLA
two-dimensional liquids
pattern recognition
fluctuating patterns
SLA cluster
Opis:
We use the probabilistic formalism of structural invariants for structure recognition of fluctuating patterns consisting of geometrical points to discuss some concepts related to time evolution of large clusters of solid-like atoms (SLA) in two-dimensional (2D) Lennard-Jones (LJ) liquid simulated using standard NVT molecular dynamics method. The relation between parental and child SLA clusters in consecutive configurations is proposed and quantified. The time of life of a cluster is close to the oscillation time ΤLJ in a harmonic regime of LJ potential. This small value is due to a fractal-like spatial distribution of SLA atoms in a cluster which results in an appearance of easily breakable one dimensional bridge-like connections between more compact parts of the cluster.
Używając probabilistycznego formalizmu strukturalnych inwariantów do rozpoznawania struktury fluktuujących wzorców utworzonych z układu punktów materialnych, badane są wybrane aspekty związane z ewolucją w czasie dużych klasterów składających się z atomów typu SLA w dwuwymiarowej (2D) cieczy Lennarda-Jonesa (LJ), symulowanej za pomocą standardowej metody dynamiki molekularnej w zespole NVT. Zaproponowano i skwantyfikowano relacje pomiędzy klasterami SLA i ich następcami – klasterami SLA w kolejnych konfiguracjach. Czas życia klastera jest bliski czasowi drgań w harmonicznym potencjale przybliżającym potencjał LJ. Ta mała wartość wynika z przypominającego fraktalny rozkładu przestrzennego atomów SLA w klasterze, w którym pojawiają się łatwo ulegające zniszczeniu wąskie połączenia pomiędzy zwartymi częściami klastera.
Źródło:
Zeszyty Naukowe Dolnośląskiej Wyższej Szkoły Przedsiębiorczości i Techniki. Studia z Nauk Technicznych; 2012, 1; 95-105
2299-3355
Pojawia się w:
Zeszyty Naukowe Dolnośląskiej Wyższej Szkoły Przedsiębiorczości i Techniki. Studia z Nauk Technicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of glycerol and temperature on the rheological properties of potato starch solutions
Autorzy:
Ayala, G.
Vargas, R.A.
Agudelo, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/24305.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
glycerol
temperature
rheological property
potato starch
solution
pseudoplastic behaviour
rheological model
Opis:
Effects of temperature and glycerol concentration on rheological properties of potato starch solutions were investi- gated. The flow behaviour (shear stress against shear rate) was fitted to various models: power law, Herschel-Bulkley, Bingham, modified Bingham and Casson models. However, it was found that the Herschel-Bulkley model describes better the flow behaviour observed at various temperatures and glycerol concentrations, for flow behaviour index values between 0.44 and 0.78, typical of pseudoplastic solutions. The effect of glycerol concentration on each of the fitting parameters for Herschel-Bulkley model was well modelled by a second-degree polynomial at various temperatures. The simultaneous influence of glycerol concentration and tempe- rature on shear stress could be represented empirically by a second- degree polynomial function that includes linear coupling between concentration and temperature. Finally, the variation of the con- sistency coefficient with both temperature and glycerol concentra- tion was well described by an exponential expression, with an acti- vation energy value of 2.78 kJ mol -1 . The results indicate that both glycerol content and temperature have the effect of diluting potato starch solutions.
Źródło:
International Agrophysics; 2014, 28, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploring Hawaiian long-term insular geodiversity dynamics
Autorzy:
Seijmonsbergen, A. C.
Guldenaar, J.
Rijsdijk, K. F.
Powiązania:
https://bibliotekanauki.pl/articles/294291.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
geodiversity dynamics
island ontogeny
topographic attributes
natural diversity
Hawaiian Islands
dynamika georóżnorodności
atrybuty topograficzne
różnorodność naturalna
wyspy hawajskie
Opis:
The role of time is underrepresented in assessments of geodiversity. Hot spot islands are unique systems to explore long-term geodiversity dynamics. The geodiversity dynamics of seven Hawaiian Islands are analysed by a qualitative-quantitative assessment using a geodiversity index. As input, freely available geological, soil and hydrological datasets are used, along with topographic diversity variables calculated from a digital elevation model. Long-term geodiversity dynamics were evaluated through correlation of island age to geodiversity class and assessment of the role of each contributing variable to the geodiversity class. The results indicate that high geodiversity is positively correlated with increasing island age, while younger islands generally correlate with low geodiversity classes. This is explained by the high contribution of topographic variables, and to a lesser extent by hydrological development and soil formation over time. These findings suggest that geodiversity dynamics play an important role in the life cycle of hot spot islands.
Źródło:
Landform Analysis; 2017, 35; 31-43
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reply to Comment on “ Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris ” with the formal description of Stanleycaris
Autorzy:
Pates, S.
Daley, A.C.
Ortega-Hernandez, J.
Powiązania:
https://bibliotekanauki.pl/articles/22116.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
As part of a comprehensive examination of all radiodontans from Cambrian localities in the USA, Pates et al. (2017a, b) and Pates and Daley (2017) revised the taxonomic affinities of several described specimens. This included the reinterpretation of two putative lobopodians, one from the Wheeler Formation (Utah, USA) and one from the Valdemiedes Formation (Spain), as frontal appendages of the radiodontan genera Stanleycaris and Caryosyntrips respectively. In their comment, Gámez Vintaned and Zhuravlev (2018) disagree with these conclusions and raise three topics for discussion: (i) anatomical features they suggest support a lobopodian affinity for “Mureropodia”; (ii) the identity of Caryosyntrips as a radiodontan, and the assignment of certain specimens to this genus; and (iii) the nomenclatural status of Stanleycaris hirpex as an invalid taxon. For (i), we dispute that the anatomical features put forward by Gámez Vintaned and Zhuravlev (2018) are biological and conclude that a lobopodian affinity for Mureropodia is untenable. In response to (ii), we provide further evidence supporting a radiodontan affinity for Caryosyntrips, and those specimens ascribed to this genus. Finally, we concur with (iii) Stanleycaris as an invalid taxon according to the International Code on Zoological Nomenclature (ICZN), and have rectified the situation by providing a valid systematic description.
Źródło:
Acta Palaeontologica Polonica; 2018, 63, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the Interplay Between the Shoulders and Low Back During Manual Patient Handling Techniques in a Nursing Setting
Autorzy:
Belbeck, A.
Cudlip, A. C.
Dickerson, C. R.
Powiązania:
https://bibliotekanauki.pl/articles/90188.pdf
Data publikacji:
2014
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
nursing
electromyography
shoulder
low back
ergonomics
ergonomia
personel pielęgniarski
techniki podnoszenia pacjentów
plecy
Opis:
The purpose of this research was to quantify shoulder demands during freestyle manual patient handling (MPH) tasks and determine whether approaches intended to prevent low back injury increased shoulder demands. Twenty females completed 5 MPH tasks found commonly in hospital settings before and after a training session using current workplace MPH guidelines. Most normalized muscle activity indices and ratings of perceived exertion decreased following training at both the low back and shoulders, but were more pronounced at the low back. There was little evidence to suggest that mechanical demands were transferred from the low back to the shoulders following the training session. The study generally supports continued use of the recommended MPH techniques, but indicates that several tasks generate high muscular demands and should be avoided if possible.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2014, 20, 1; 127-137
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of the effects of crystal dispersion at different orders in the mixing of three phase-matched waves on a 5- to 100-fs time scale
Autorzy:
Andreoni, A.
Bondani, M.
Potenza, M.A.C.
Powiązania:
https://bibliotekanauki.pl/articles/308723.pdf
Data publikacji:
2000
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
three-wave mixing
ultra-broadband phase-matching
beta-barium borate
group velocity matching
group velocity dispersion
Opis:
A number of manners to obtain first-order achromatic phase matching of both type I and type II are presented and the most advantageous ones are identified to generate high-spectral quality 100-fs pulses by either parametric generation or frequency up-conversion. In the case of frequency-doubling high-energy 5-fs Ti: sapphire pulses, a non-collinear phase-matching I geometry in a beta-barium borate crystal cut at 44 deg is devised that should allow high conversion efficiency, virtually without pulse lengthening and intra-pulse frequency chirp due to group-velocity dispersion.
Źródło:
Journal of Telecommunications and Information Technology; 2000, 1-2; 16-19
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the content of trace elements in soils and roadside vegetation in the vicinity of some gasoline stations in Olsztyn (Poland)
Autorzy:
Rolka, E.
Zolnowski, A.C.
Kozlowska, K.A.
Powiązania:
https://bibliotekanauki.pl/articles/14832.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2020, 25, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Access-II: a detailed model for crop growth and water conditions
Autorzy:
Armstrong, A.C.
Legros, J.P.
Voltz, M.
Powiązania:
https://bibliotekanauki.pl/articles/25694.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil water
water condition
crop growth
climate condition
England
validation
France
climate change
Źródło:
International Agrophysics; 1996, 10, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 2109

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