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Tytuł:
Pojednanie w prawdzie
Autorzy:
SI.
Powiązania:
Nasz Dziennik 2009, nr 218, s. 8
Data publikacji:
2009
Tematy:
Dec Ignacy mowy
Dec, Ignacy
Agresja zbrojna 1939 r. ZSRR na Polskę obchody rocznicowe 2009 r.
Sprawa katyńska Polska 2009 r.
Kazania patriotyczne
Opis:
Msza św. dla sybiraków w katedrze świdnickiej z okazji 70. rocznicy napaści na Polskę przez ZSRR. Kazanie ks. Ignacego Deca, w którym pytał, czemu ma służyć taka poprawność polityczna, która ma charakter antypolski, aby zbrodni katyńskiej nie nazwać ludobójstwem?.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
The methodical maintenance of independent work in the suplementary professional educational system
Autorzy:
Nevdakh, S.I.
Powiązania:
https://bibliotekanauki.pl/articles/4808.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Opis:
This article reveals the methodic foundations of the organization of independent work in the supplementary professional educational system. The independent work is regarded as one of the compulsory parts of learning process. The author describes the types of independent work, conditions and stages of its organization, principles of its implementation, its methodic and service maintenance. The following types of independent work are presented: studying separate questions, themes, sections, not considered at the lessons and lectures; preparing for assistance to the teacher/lecturer; drawing up a plan; taking a test; writing a review, an annotation, a thesis, a synopsis, an abstract, a thematic report, an essay, a project, a course paper and a diploma paper and others.
В данной статье раскрываются методические основы организации самостоятельной работы в системе дополнительного профессионального образования. Самостоятельная работа является одним из обязательных видов учебной деятельности. Рассматриваются виды самостоятельной работы, условия и этапы ее организации, принципы реализации, методическое и сервисное обеспечение. Представлены виды заданий для самостоятельной работы слушателей: изучение отдельных вопросов, тем, разделов, не рассматриваемых на занятиях; подготовка к ассистированию преподавателю; составление плана; контрольная работа; составление рецензии; составление аннотации; составление тезисов; ведение конспекта; подготовка реферата; подготовка тематического сообщения; написание эссе; выполнение проекта, выполнение курсовой и дипломной работ и др.
Źródło:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna; 2010, 09
1895-8680
Pojawia się w:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Od „polityki kulturalnej” do „teologii kultury” - przykład Papieskiego Instytutu Studiów Kościelnych w Rzymie
From „cultural policy” to „theology of culture” – an example of the Pontifical Institute of Church Studies
Autorzy:
Danieluk SI, Robert
Powiązania:
https://bibliotekanauki.pl/articles/1602559.pdf
Data publikacji:
2021-06-30
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
Papieski Instytut Studiów Kościelnych
PISK
jezuici
ks. Eugeniusz Reczek
teologia kultury
polityka kulturalna
Pontifical Institute of Ecclesiastical Studies
Jesuits
Fr. Eugeniusz Reczek
theology of culture
politics of culture
Opis:
W artykule zaprezentowano genezę i działalność Papieskiego Instytutu Studiów Kościelnych jako przykład podejścia Kościoła do dóbr kultury. Widziane jako narzędzie ewangelizacji i przestrzeń dialogu są one od dawna przedmiotem troski Kościoła, która w ostatnich dziesięcioleciach ubiegłego wieku przybrała również wymiar instytucjonalny na poziome centralnym (watykańskie dykasteria i rzymskie programy formacyjne) oraz lokalnym (inicjatywa kard. Stefana Wyszyńskiego i o. Eugeniusza Reczka SJ). Źródeł tych konkretnych działań upatrywać należy w zakorzenionym w Biblii chrześcijańskim podejściu do pamięci i historii, która postrzegana głębiej oznacza dla Kościoła bardziej „teologię” niż „politykę” kultury.
The article presents the genesis and activity of the The Pontifical Institute of Ecclesiastical Studies as an example of the Catholic Church’s approach to cultural heritage. They are seen as a tool of evangelization and a space for dialogue, and have long been the Church’s concern, which in the last decades of the last century also took on an institutional dimension at the central (Vatican dicasteries and Roman formation programmes) and local levels (initiative of Cardinal Stefan Wyszynski and Fr. Eugeniusz Reczek, SJ). The sources of these concrete actions may be found in the Christian approach to memory and history, which is rooted in the Bible. For the Church, history has a deeper meaning, it is perceived as ‘theology’ rather than ‘politics’ of culture.
Źródło:
Archiwa, Biblioteki i Muzea Kościelne; 2021, 115; 73-82
0518-3766
2545-3491
Pojawia się w:
Archiwa, Biblioteki i Muzea Kościelne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of winter wheat on soil thermal properties of a Paleudalf
Autorzy:
Haruna, S.I.
Powiązania:
https://bibliotekanauki.pl/articles/2082568.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
thermal conductivity
volumetric heat capacity
thermal diffusivity
soil organic carbon
Opis:
Soil thermal properties can influence several soil processes important for crop productivity. This study was conducted to evaluate the influence of cover crops on selected soil physical and thermal properties. The field site was set up using a randomized complete block design with two levels of cover crops (cover crops versus no cover crops). The soil thermal properties measured included thermal conductivity, volumetric heat capacity, and thermal diffusivity. The physical properties of the soil studied included bulk density, volumetric water content, total pore spaces, water-filled pore spaces, air-filled pore spaces, gas diffusion coefficient, and soil pore tortuosity factor. Soil organic carbon was also measured. The results showed that soil organic carbon was 26% higher under cover crops management compared to no cover crops management. Thermal conductivity and thermal diffusivity were positively correlated with soil bulk density and these properties (soil thermal conductivity and soil thermal diffusivity) were higher under no cover crops management compared with cover crops management probably due to the proximity between soil particles. The volumetric heat capacity was positively correlated with soil organic carbon, with soil organic carbon being higher under cover crops management compared with no cover crops management. Results from the current study show that cover crops can improve soil physical and thermal properties which may benefit crop productivity as corroborated via laboratory measurements.
Źródło:
International Agrophysics; 2019, 33, 3; 389-395
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Retoryka biblijna-semicka
Autorzy:
Meynet S.I., Roland
Powiązania:
https://bibliotekanauki.pl/articles/578725.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Opolski. Redakcja Wydawnictw Wydziału Teologicznego
Tematy:
retoryka biblijna
retoryka semicka
kompozycja tekstu
kompozycje równoległe
kompozycje koncentryczne
interpretacja
biblical rhetoric
Semitic rhetoric
text composition
parallelism
concentrism
interpretation
Opis:
The aim of this article is to make a short and a practical introduction to the Biblical and Semitic Rhetorical analysis. It begins with a brief historical overview of the development of this biblical approach starting from its founders focus on their discovery of key elements of rhetorical compositions found in the Bible like parallelismus membrorum, parallel and concentric compositions. In the second part of this article the author show how those rhetorical compositions function on various levels of composition starting with small textual units and ending with textual large. In the last part the author give some hints on how to interpret the text taking into consideration its composition and the biblical context. The article concludes with a sample of rhetorical analysis of an Islamic prayer and its comparison with the Lord’s Prayer.
Celem tego artykułu jest krótkie oraz praktyczne wprowadzenie do analizy retoryki biblijnej oraz semickiej. Rozpoczyna się od krótkiej historycznej prezentacji rozwoju tej metody biblijnej, poczynając od założycieli tej metody, skupiając się na odkrytych przez nich kluczowych elementach retorycznych kompozycji znajdujących się w Piśmie Św. takich jak parallelismus membrorum, kompozycje równoległe oraz koncentryczne. W drugiej części tego artykułu autor ukazuje, jak owe kompozycje retoryczne funkcjonują na różnych poziomach kompozycji, poczynając od małych jednostek literackich, a kończąc na dużych jednostkach literackich. W ostatniej części autor podaje parę wskazówek, jak interpretować tekst, biorąc pod uwagę jego kompozycje oraz kontekst biblijny. Artykuł kończy się przykładem modlitwy muzułmańskiej oraz jej porównaniem z Modlitwą Pańską.
Źródło:
Scriptura Sacra; 2019, 23; 11-42
1428-7218
Pojawia się w:
Scriptura Sacra
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Le psaume 18. L’action de grâce de David pour son Libérateur
Psalm 18. Thanksgiving David’s for his Liberator
Psalm 18. Dziękczynienie Davida dla swojego wyzwoliciela
Autorzy:
Meynet, S.I., Roland
Powiązania:
https://bibliotekanauki.pl/articles/1375706.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Opolski. Redakcja Wydawnictw Wydziału Teologicznego
Tematy:
Ps 18
2S 22
analyse rhétorique
fonction conclusive
composition concentrique
fidélité
2 Sm 22
analiza retoryczna
funkcja rozstrzygająca
konstrukcja koncentryczna
wierność
2 Sam 22
rhetorical analysis
conclusive function
concentric composition
fidelity
Opis:
Ps 18 jest trzecim najdłuższym w Psałterzu. Swe znaczenie jednak zawdzięcza nie tyle swej długości; wynika ono również i przede wszystkim z faktu, że psalm ten spełnia funkcję podsumowującą: podobnie jak jego dublet znajduje się na końcu Ksiąg Samuela (2 Sm 22), tak Ps 18 wieńczy pierwszą podsekcję pierwszej księgi Psałterza (Ps 1–18). Jego tytuł, szczególnie rozwinięty, to sugeruje: „w dniu, w którym Yhwh wybawił go z ręki wszystkich jego wrogów i z ręki Saula”. Poemat zawiera siedem fragmentów ułożonych koncentrycznie wokół deklaracji o niewinności (w. 21-30), która jednak nie przestaje stwarzać problemy. Stwierdzenie, że te wersety są późniejsze, nie usuwa trudności, a faktycznie świadczy jedynie o niezdolności do rozwiązania zagadki, która jest zawsze w centrum tej koncentrycznej kompozycji. Klucz nie pozostaje ukryty, lecz jest zaoferowany w formule, która wyznacza punkt zwrotny tekstu: „Z wiernymi jesteś wierny” (w. 26).
Psalm 18 is the third longest in the Psalter. Still, its meaning is owed not so much to its length as mostly to the fact that the psalm fulfils a summarising function: similarly to its doublet that ends the Books of Samuel (2 Sm 22) Psalm 18 concludes the first subsection of the first book of the Psalter (Pss 1–18). It is suggested by its particularly expanded title: “when Yahweh had delivered him from all his enemies and from the clutches of Saul”. The poem includes seven fragments arranged concentrically around the declaration of innocence (vv. 21-30) which does not, however, cease to create problems. The statement that those verses are later does not eliminate the difficulties. In fact, it only indicates the inability to solve the riddle which is always in the centre of this concentric composition. The key is not hidden but offered in the formula that marks the turning point of the text: “You are faithful to the faithful” (v. 26).
Le Ps 18 est le troisième plus long du Psautier. Son importance toutefois n’est pas seulement due à sa longueur; elle tient aussi et surtout au fait que ce psaume remplit une fonction conclusive: de même en effet que son double se trouve à la fin des livres de Samuel (2S 22), ainsi le Ps 18 conclut la première sous-section du premier livre des psaumes (Ps 1–18). Son titre, particulièrement développé, le laisse entendre: «au jour où Yhwh le délivra de la paume de tous ses ennemis et de la main de Saül». Le poème comprend sept passages organisés de manière concentrique autour d’une déclaration d’innocence (v. 21-30) qui ne laisse pas de poser problème. Prétendre que ces versets sont secondaires ne saurait lever la difficulté; cela ne fait, en réalité, que témoigner de l’impuissance à résoudre l’énigme que constitue toujours le centre d’une composition concentrique. La clé n’est pas cachée, elle offerte dans la formule qui marque le tournant du texte: «Avec le fidèle tu es fidèle» (v. 26).
Źródło:
Scriptura Sacra; 2018, 22; 17-48
1428-7218
Pojawia się w:
Scriptura Sacra
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health benefits of black tea
Autorzy:
Kumar, D.
Rizvi, S.I.
Powiązania:
https://bibliotekanauki.pl/articles/1916581.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Black tea
health
oxidative stress
polyphenols
Opis:
Tea is the most common beverage in the world. It is consumed mostly as green tea, oolong, or black tea. Depending on the manufacturing process, different varieties of tea can be produced. As tea is one of the most popular beverages, it could be a tremendously important source of polyphenolic constituents. Tea leaves are a source of polyphenols, especially catechins, which are known for their antioxidative activity. Various studies suggest that polyphenolic compounds present in black tea are associated with beneficial effects in prevention of cardiovascular diseases. In addition, anti-aging, antidiabetic and many other health beneficial effects associated with tea consumption have been reported. The review highlights the potential of black tea, its health benefits in terms of antioxidative, antimutagenic and anticarcinogenic properties as well as protective agents against cardiovascular diseases.
Źródło:
Progress in Health Sciences; 2014, 4, 2; 135-143
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatio-temporal dynamics of vegetation cover in North-West Algeria using remote sensing data
Autorzy:
Tayeb, Tayeb Si
Kheloufi, Benabdeli
Powiązania:
https://bibliotekanauki.pl/articles/92530.pdf
Data publikacji:
2019
Wydawca:
Oddział Kartograficzny Polskiego Towarzystwa Geograficznego
Tematy:
land cover
spatio-temporal dynamics
remote sensing
NDVI
Oranie
Opis:
Land cover change is the result of complex interactions between social and environmental systems which change over time. While climatic and biophysics phenomena were for a long time the principal factor of land transformations, human activities are today the origin of the major part of land transformation which affects natural ecosystems. Quantification of natural and anthropogenic impacts on vegetation cover is often hampered by logistical issues, including (1) the difficulty of systematically monitoring the effects over large areas and (2) the lack of comparison sites needed to evaluate the effect of the factors. The effective procedure for measuring the degree of environmental change due to natural factors and human activities is the multitemporal study of vegetation cover. For this purpose, the aim of this work is the analysis of the evolution of land cover using remote sensing techniques, in order to better understand the respective role of natural and anthropogenic factors controlling this evolution. A spatio-temporal land cover dynamics study on a regional scale in Oranie, using Landsat data for two periods (1984–2000) and (2000–2011) was conducted. The images of the vegetation index were classified into three classes based on Normalized Difference Vegetation Index (NDVI) values and analysed using image difference approach. The result shows that the vegetation cover was changed. An intensive regression of the woody vegetation and forest land resulted in -22.5% of the area being lost between 1984 and 2000, 1,271 km2 was converted into scrub formations and 306 km2 into bare soil. On the other hand, this class increased by around 45% between 2000 and 2011, these evolutions resulting from the development of scrub groups with an area of 1,875.7 km2.
Źródło:
Polish Cartographical Review; 2019, 51, 3; 117-127
2450-6974
Pojawia się w:
Polish Cartographical Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Excitonic quasimolecule consisting of two semiconductor quantum dots
Autorzy:
Pokutnyi, S.I.
Salejda, W.
Powiązania:
https://bibliotekanauki.pl/articles/173809.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
spatially separated electron and holes
quantum dots
binding energy
Coulomb and exchange interaction
Opis:
The effect of a significant increase in the binding energy of the singlet ground state of an excitonic quasimolecule consisting of two CdS quantum dots, in comparison with the binding energy of a biexciton in a single crystal of CdS (almost by two orders of magnitude), has been found.
Źródło:
Optica Applicata; 2016, 46, 4; 629-637
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intracellular reduced glutathione content in normal and type 2 diabetic erythrocytes: effect of insulin and (-)epicatechin
Autorzy:
Rizvi, S.I.
Zaid, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/70507.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
Pterocarpus marsupium
insulin
oxidative stress
Indian folk medicine
in vitro
antidiabetic drug
catechin
epicatechin
diabetes type 2
patient
erythrocyte
glutathione content
folk medicine
Źródło:
Journal of Physiology and Pharmacology; 2001, 52, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of energies on the impact breakage characteristic of magnetite ores
Autorzy:
Si, Liang
Cao, Yijun
Li, Guosheng
Powiązania:
https://bibliotekanauki.pl/articles/2200336.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fractal dimension
ore breakage characteristic
particle size distribution
mineral liberation
fracture morphology
Opis:
The energy applied during breakage is the key to enhancing the magnetite liberation degree and improving quality. The relationship between energy and liberation properties remains unclear due to various complicated factors affecting mineral liberation. Therefore, this work aims to study the effect of energy on the breakage characteristics of magnetite ores; the impact breakage test was conducted on magnetite particle groups at different energies using a drop weight impact tester; the statistical analysis was performed based on the fractal theory to research the particle size distribution; the fracture morphology and liberation properties of these ores were analyzed using scanning electron microscope and mineral liberation analyzer. Results show that the particle size distribution of magnetite after breakage conforms to the fractal law. The larger the energy, the greater the fractal dimension for this distribution, showing a linear relation between them, which implies that the fractal dimension can evaluate the breakage degree. The fracture morphology of magnetite ores indicates that as the energy increases, the intergranular fracture evolves into transgranular fracture, proving the influence of energy on fracture modes. It is found that the magnetite liberation degree first increases and then decreases with the rising of energy, indicating that the magnetite liberation can be improved at an appropriate amount of energy. The above conclusions provide a theoretical reference for optimizing energy and improving broken product quality.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 1; art. no. 159098
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical and experimental analysis on the interaction properties between tracks and sediments considering sand content for unmanned underwater tracked bulldozer
Autorzy:
Li, Yong
He, Dingchang
Si, Qiaorui
Powiązania:
https://bibliotekanauki.pl/articles/2090708.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
unmanned underwater tracked bulldozer
underwater robot
river bed sediment
shear stress
pressure-sinkage
spychacz gąsienicowy bezzałogowy podwodny
robot podwodny
osad z koryta rzeki
naprężenie ścinające
spadek ciśnienia
Opis:
The unmanned underwater tracked bulldozer (UUTB) is an indispensable equipment for dredging and cleaning obstacles on the river bed in the flood season. The investigation on the interaction properties between the UUTB tracks and sediments provides foundation for the evaluation of operation performance when it works on the inland river bed. Based on the current worldwide research, the sediments mixed by sand, bentonite and water with sand content 0%, 10% and 20% were configured in this study to replace the real sediments on the inland river bed in China. The current pressure-sinkage model and shear stress-shear displacement model were discussed. Three different tracks were tested for the pressure-sinkage and the shear stress-shear displacement on the platform. The relationship between pressure and sinkage under sand content 0%, 10% and 20% are revealed based on the experimental results. The modulus of cohesive deformation and friction deformation of the sediments under said sand content are presented. The curves of shear stress and shear displacement are also obtained, which demonstrates the properties between the tracks and configured sediments under sand content 0%, 10% and 20%. The relationship between the tractive force and slip ratio with three different tracks under said sand content is also presented based on the quantitative analysis, which provides reference for the dynamics control and performance evaluation of UUTB on the inland river bed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136036, 1--13
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytic solutions of a second-order functional differential equation with a state derivative dependent delay
Autorzy:
Si, Jian-Guo
Wang, Xin-Ping
Powiązania:
https://bibliotekanauki.pl/articles/965956.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
analytic solution
functional differential equation
Opis:
This paper is concerned with a second-order functional differential equation of the form $x''(z)=x(az+bx'(z))$ with the distinctive feature that the argument of the unknown function depends on the state derivative. An existence theorem is established for analytic solutions and systematic methods for deriving explicit solutions are also given.
Źródło:
Colloquium Mathematicum; 1999, 79, 2; 273-281
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protective role of black tea and vitamin C during sub-acute toxicity of carbofuran in rats
Autorzy:
Kumar, D.
Sharma, B.
Rizvi, SI.
Powiązania:
https://bibliotekanauki.pl/articles/1917823.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Carbofuran
erythrocytes
black tea
vitamin C
oxidative stress
Opis:
Purpose: Carbofuran toxicity on rats was studied during sub-acute exposure. This work was undertaken to evaluate the protective effect of aqueous black tea extract and vitamin C against a rat model of oxidative stress induced by treatment with carbofuran, an organocarbamate insecticide. Materials and methods: The levels of lipid peroxidation, reduced glutathione and ascorbic acid were assessed by determining the extent of oxidative stress in the erythrocytes of rats. Results: The results clearly demonstrated that the treatment of rats with sub-acute concentration of carbofuran caused significant elevation in the levels of oxidative stress and decrease in the contents of glutathione and ascorbic acid. The introduction of black tea extract and vitamin C augmented the antioxidant defense mechanism in alleviating the carbofuran induced oxidative stress. Conclusion: The findings that the pretreatment with black tea and vitamin C can mitigate carbofuran induced toxicity lend evidence that supplementation with either black tea extract and/or vitamin C have a therapeutic potential in amelioration of oxidative stress in mammalian systems
Źródło:
Progress in Health Sciences; 2016, 6(2); 148-154
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jezuici w obiektywie. Zbiory fotograficzne Archiwum Prowincji Wielkopolsko-Mazowieckiej Towarzystwa Jezusowego
Autorzy:
Dorosz SI ks., Krzysztof
Trzcińska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2088370.pdf
Data publikacji:
2021-12-30
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
polish Jesuits
Greater Poland and Masovia Province of the Society of Jesus
archival photography
jezuici polscy
Prowincja Wielkopolsko-Mazowiecka Towarzystwa Jezusowego
fotografia archiwalna
Opis:
Artykuł ma na celu przedstawienie zbiorów fotograficznych znajdujących się w posiadaniu Archiwum Prowincji Wielkopolsko-Mazowiec-kiej Towarzystwa Jezusowego. W ostatnich latach daje się zaobserwować wzrost zainteresowania zdjęciami zarówno wśród zawodowych historyków, jak i pasjonatów przeszłości. Zdjęcia w posiadaniu Archiwum obejmują okres od początku XX wieku po współczesność. W pierwszej kolejności uwiecznieni na nich zostali przede wszystkim ludzie: jezuici wszystkich szczebli hierarchii zakonnej, ważne postaci historii Polski i Kościoła powszechnego, a także osoby świeckie związane z jezuitami. Następnie można wyodrębnić zdjęcia budynków należących do jezuitów i prowadzonych przez nich dzieł oraz dokumentację ważnych wydarzeń w historii Polski. Artykuł zamyka omówienie zdjęć jezuitów – pasjonatów fotografii.
The goal of the paper is to present photographic collection belonging to the Archive of Greater Poland and Masovia Province of the Society of Jesus. In recent years an increased interest in photographs can be observed among both professional historians and history enthusiasts alike. The Archive’s photographs document period from the beginning of 20th century to current day. First and foremost the present people: Jesuits of all levels of the Order’s hierarchy, important historical figures of Poland and the Catholic Church and lay people connected to Jesuits. Second group of photographs is the pictures of buildings belonging to Jesuits and their institutions and works, then documentary photographs of important events in Polish history. The paper concludes with presentation of photographs made by Jesuits-enthusiasts of photography.
Źródło:
Archiwa, Biblioteki i Muzea Kościelne; 2021, 117, specjalny; 67-86
0518-3766
2545-3491
Pojawia się w:
Archiwa, Biblioteki i Muzea Kościelne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical and experimental analysis on the interaction properties between tracks and sediments considering sand content for unmanned underwater tracked bulldozer
Autorzy:
Li, Yong
He, Dingchang
Si, Qiaorui
Powiązania:
https://bibliotekanauki.pl/articles/2173566.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
unmanned underwater tracked bulldozer
underwater robot
river bed sediment
shear stress
pressure-sinkage
spychacz gąsienicowy bezzałogowy podwodny
robot podwodny
osad z koryta rzeki
naprężenie ścinające
spadek ciśnienia
Opis:
The unmanned underwater tracked bulldozer (UUTB) is an indispensable equipment for dredging and cleaning obstacles on the river bed in the flood season. The investigation on the interaction properties between the UUTB tracks and sediments provides foundation for the evaluation of operation performance when it works on the inland river bed. Based on the current worldwide research, the sediments mixed by sand, bentonite and water with sand content 0%, 10% and 20% were configured in this study to replace the real sediments on the inland river bed in China. The current pressure-sinkage model and shear stress-shear displacement model were discussed. Three different tracks were tested for the pressure-sinkage and the shear stress-shear displacement on the platform. The relationship between pressure and sinkage under sand content 0%, 10% and 20% are revealed based on the experimental results. The modulus of cohesive deformation and friction deformation of the sediments under said sand content are presented. The curves of shear stress and shear displacement are also obtained, which demonstrates the properties between the tracks and configured sediments under sand content 0%, 10% and 20%. The relationship between the tractive force and slip ratio with three different tracks under said sand content is also presented based on the quantitative analysis, which provides reference for the dynamics control and performance evaluation of UUTB on the inland river bed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136036
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New results of our superoxide dismutase studies and future plans in this fields
Nowe wyniki badań własnych dysmutazy ponadtlenkowe3 i zamierzenia badawcze
Autorzy:
Matkovics, B
Szabó, L
Varga, S.I
Powiązania:
https://bibliotekanauki.pl/articles/945080.pdf
Data publikacji:
1986
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Źródło:
Acta Universitatis Lodziensis. Folia Biochimica et Biophysica; 1986, 5
0208-614X
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biochimica et Biophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of pyramid/nanowire binary structure on n-type silicon using chemical etching
Autorzy:
Si Ahmed, Y.
Hadjersi, T.
Chaoui, R.
Powiązania:
https://bibliotekanauki.pl/articles/1068526.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
88.40.jj
Opis:
A pyramid and nanowire binary structure of n-type monocrystalline silicon surface was fabricated by two-step chemical etching process. The nanowire surface is formed by electroless etching in HF-AgNO₃ aqueous solution after being textured in KOH/IPA solution. Optical absorption was compared between this structure and that of random pyramid arrays. The effective reflectance calculated between 400 and 1100 nm decreased from ≈ 40% to ≈ 15% after pyramidal texturing and ≈ 4% after formation of vertically aligned nanowires with a length less than 1 μ m. This simple and low-cost surface structuring technique holds high potential for the manufacture of terrestrial silicon solar cells with reduced optical losses.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 385-387
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficacy of Lepidium Sativum to act as an anti-diabetic agent
Autorzy:
Mishra, N.
Mohammed, A.
Rizvi, S.I.
Powiązania:
https://bibliotekanauki.pl/articles/1918412.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Lepidium sativum
diabetes
insulin
streptozotocin
oxidative stress
cholesterol
Opis:
Objective: Lepidium sativum, commonly known as chandrashoor in India, has been used in the Indian traditional medicine system for the treatment of various diseases. The present study was undertaken to investigate the hypoglycemic effect of Lepidium sativum in normal and streptozotocin-induced diabetic rats. Materials and methods: Thirty (30) adult male Wistar rats weighing 157±51g were randomly assigned to five groups of six rats each as Normal control, Diabetic control, Diabetics supplemented with Lepidium sativum extract, Diabetics treated with insulin, and Normal rats supplemented with Lepidium sativum. All rats were fed with a normal laboratory diet, nutrient rich pellets, and had free access to drinking water. The rats were injected with streptozotocin at a dose of 45 mg/kg body weight intraperitoneally to induce diabetes. The extracts were then given orally to different groups of rats at a dose of 20mg/kg body weight for 16 days. Thereafter, the rats were sacrificed, and blood samples collected by cardiac puncture were used for the determination of Glucose, Creatinine, Alkaline Phosphatase, Cholesterol, Malondialdehyde level, % DPPH, and FRAP content. Results: Administration of lepidium extract showed a significant reduction in glucose, creatinine, and alkaline phosphatase levels. Elevated cholesterol level was restored approximately to normal; a significant decrease in malondialdehyde levels was also observed compared to diabetic controls. Conclusion: Lepidium sativum extract shows efficacy in the prevention and management of diabetes mellitus and its related complications.
Źródło:
Progress in Health Sciences; 2017, 7(1); 44-53
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Piezoelectric Effect in Strained CdTe-Based Heterostructures
Autorzy:
Cibert, J.
Andre, R.
Le Si, Dang
Powiązania:
https://bibliotekanauki.pl/articles/1933682.pdf
Data publikacji:
1995-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.Ηf
78.20.Ηp
77.65.Bn
Opis:
Strained III-V or II-VI heterostructures grown along a polar axis incorporate a piezoelectric field which strongly alters their electronic properties. We review some experimental studies of this built-in field, and its consequences, in CdTe-CdMnTe and CdTe-CdZnTe heterostructures. This includes: (i) the measure of the built-in field, with as an example the dependence of the piezoelectric coefficient on bond length; (ii) the description of the exciton formed by an electron and a hole which can be continuously separated in space by the piezoelectric field; (iii) some examples of the extreme sensitivity to any additional electric field.
Źródło:
Acta Physica Polonica A; 1995, 88, 4; 591-600
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epidemiological characteristics, seasonality, trends of dog bite injuries, and relationship with meteorological data
Autorzy:
Yılmaz, S.
Delice, O.
Yılmaz, S.İ.
Powiązania:
https://bibliotekanauki.pl/articles/28761705.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 2; 229-234
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions and a computation method of the constrained regulation problem for a class of fractional-order nonlinear continuous-time systems
Autorzy:
Si, Xindong
Yang, Hongli
Ivanov, Ivan G.
Powiązania:
https://bibliotekanauki.pl/articles/1838174.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fractional order nonlinear system
constrained regulation
positively invariant set
linear programming
układ nieliniowy
zbiór dodatnio niezmienny
programowanie liniowe
Opis:
The constrained regulation problem (CRP) for fractional-order nonlinear continuous-time systems is investigated. New existence conditions of a linear feedback control law for a class of fractional-order nonlinear continuous-time systems under constraints are proposed. A computation method for solving the CRP for fractional-order nonlinear systems is also presented. Using the comparison principle and positively invariant set theory, conditions guaranteeing positive invariance of a polyhedron for fractional-order nonlinear systems are established. A linear feedback controller model and the corresponding algorithm of the CRP for fractional nonlinear systems are also proposed by using the obtained conditions. The presented model of the CRP is formulated as a linear programming problem, which can be easily implemented from a computational point of view. Numerical examples illustrate the proposed method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 17-28
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions and a computation method of the constrained regulation problem for a class of fractional-order nonlinear continuous-time systems
Autorzy:
Si, Xindong
Yang, Hongli
Ivanov, Ivan G.
Powiązania:
https://bibliotekanauki.pl/articles/1838194.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fractional order nonlinear system
constrained regulation
positively invariant set
linear programming
układ nieliniowy
zbiór dodatnio niezmienny
programowanie liniowe
Opis:
The constrained regulation problem (CRP) for fractional-order nonlinear continuous-time systems is investigated. New existence conditions of a linear feedback control law for a class of fractional-order nonlinear continuous-time systems under constraints are proposed. A computation method for solving the CRP for fractional-order nonlinear systems is also presented. Using the comparison principle and positively invariant set theory, conditions guaranteeing positive invariance of a polyhedron for fractional-order nonlinear systems are established. A linear feedback controller model and the corresponding algorithm of the CRP for fractional nonlinear systems are also proposed by using the obtained conditions. The presented model of the CRP is formulated as a linear programming problem, which can be easily implemented from a computational point of view. Numerical examples illustrate the proposed method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 17-28
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions and a computation method of the constrained regulation problem for a class of fractional-order nonlinear continuous-time systems
Autorzy:
Si, Xindong
Yang, Hongli
Ivanov, Ivan G.
Powiązania:
https://bibliotekanauki.pl/articles/1838196.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fractional order nonlinear system
constrained regulation
positively invariant set
linear programming
układ nieliniowy
zbiór dodatnio niezmienny
programowanie liniowe
Opis:
The constrained regulation problem (CRP) for fractional-order nonlinear continuous-time systems is investigated. New existence conditions of a linear feedback control law for a class of fractional-order nonlinear continuous-time systems under constraints are proposed. A computation method for solving the CRP for fractional-order nonlinear systems is also presented. Using the comparison principle and positively invariant set theory, conditions guaranteeing positive invariance of a polyhedron for fractional-order nonlinear systems are established. A linear feedback controller model and the corresponding algorithm of the CRP for fractional nonlinear systems are also proposed by using the obtained conditions. The presented model of the CRP is formulated as a linear programming problem, which can be easily implemented from a computational point of view. Numerical examples illustrate the proposed method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 17-28
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural Characteristics of Ti-Al-Dy Alloy Produced by High Energy Ball Milling
Autorzy:
Kim, Yuri
Rhee, Hoseong
Chang, Si Young
Powiązania:
https://bibliotekanauki.pl/articles/2049319.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high energy ball milling
Ti-Al-Dy powders
SPS
microstructure
micro-hardness
Opis:
In this study, the alloying of Ti, Al and Dy powders by high energy ball milling, and the spark plasma sintering (SPS) characteristics of as milled powders have been investigated based on the observation of microstructure. Pure Ti, 6wt% Al and 4wt% Dy powders were mixed and milled with zirconia balls at 600 ~ 1000 rpm for 3h in an Ar gas. The initial sizes of Ti, Al and Dy powders were approximately 20, 40, and 200 μm, respectively. With increasing the milling speed from 600 to 1000 rpm, the size of mixing powders reduced from 120 to 15 μm. On the other hand, from XRD results of powders milled at higher speeds than 700rpm, the peaks of Ti3Al and AlDy phases were identified, indicating the successful alloying. Therefore, the powders milled at 800 rpm have been employed for the SPS under the applied pressure of 50 MPa at 1373K for 15 min. In the SPSed sample, the Al3Dy and two ternary Ti-Al-Dy phases were newly detected, while the peak of AlDy phase disappeared. The SPSed Ti-6Al-4Dy alloy revealed high relative density and micro-hardness of approximately 99% and 950Hv, respectively.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 789-783
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lower quadrangular frame beams of the Church of the Transfiguration on Kizhi Island, Russia
Renowacja belek dolnej czworokątnej ramy konstrukcyjnej cerkwi Przemienienia Pańskiego na wyspie Kiży w Rosji
Autorzy:
Serov, E.M.
Mironova, S.I.
Orłowicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/217990.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Konserwatorów Zabytków
Tematy:
wooden architecture
lower
quadrangular frame
beam strengthening
engineering strengthening
architektura drewniana
dolna rama czworokątna
wzmacnianie belek
inżynieria wzmacniania
Opis:
The paper describes a comprehensive conservation renovation initiated in 2008 on a unique Russian wooden architecture heritage building – the Orthodox Church of the Transfiguration on the island of Kizhi in Russia. For the purposes of renovation, the 300-year old structure was divided into 7 tiers. Conservation work is currently being carried out on the third and fourth tiers. The paper presents inter alia: possible options for changing and strengthening the lower beams of the quadrangular frame, constituting the building structure, which have recently been removed.
W artykule przedstawiono kompleksowy remont konserwatorski zapoczątkowany w 2008 roku w unikalnym na skalę światową zabyku drewnianej architektury rosyjskiej, czyli cerkwi Przemienienia na wyspie Kiży w Rosji. Podczas prac ta ponad 300-letnia konstrukcja została podzielona na 7 kondygnacji. Obecnie prace konserwatorskie odbywają się na trzeciej i czwartej kondygnacji. W artykule przedstawiono m.in. możliwe warianty wymiany i wzmocnienia niedawno usuniętych dolnych belek czworokątnej ramy tworzącej konstrukcję obiektu.
Źródło:
Wiadomości Konserwatorskie; 2016, 46; 125-130
0860-2395
2544-8870
Pojawia się w:
Wiadomości Konserwatorskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A decision diagram based reliability evaluation method for multiple phased-mission systems
Metoda oceny niezawodności systemów wielofazowych w oparciu o diagramy decyzyjne
Autorzy:
Zhang, S.
Sun, S.
Si, S.
Wang, P.
Powiązania:
https://bibliotekanauki.pl/articles/301521.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
systemy wielofazowe
binarny diagram decyzyjny
wielostanowy wielowartościowy diagram decyzyjny
ocena niezawodności
multiple phased-mission systems
Binary decision diagram
multi-state multi-valued decision diagram
reliability evaluation
Opis:
The multiple phased-mission system (MPMS) exists widely in practical engineering, such as aviation, spaceflight and navigation fields. Its distinct characteristic is that the system usually performs multiple missions and each mission consists of different phases. In this paper, we mainly focus on the reliability analysis for MPMS when the components have to accomplish different missions successively. A new modeling method is proposed for MPMS analysis based on the binary decision diagram (BDD) and multi-state multi-valued decision diagram (MMDD). Through this method, different phases of missions are combined with in the whole system by certain merging rules according to the operating time of a common component. Then, the system reliability can be calculated by the common calculation methods of decision diagrams by generating the through. Finally, two case studies are implemented to demonstrate the generation of BDD/MMDD models and the evaluation of system reliability. The experiment results verified the efficiency and accuracy of the proposed modeling methods.
Systemy wielofazowe (Multiple Phased-Mission Systems, MPMS), t.j. systemy o wielu zadaniach okresowych są powszechnie stosowane w praktyce inżynieryjnej, np. w lotnictwie, lotach kosmicznych czy nawigacji. Cechą wyróżniającą tego typu systemy jest to, że zazwyczaj wykonują one wiele zadań, z których każde składa się z różnych faz. Głównym tematem poniższej pracy jest analiza niezawodności MPMS dla przypadków, kiedy elementy składowe muszą wykonywać różne misje jedna po drugiej. W artykule zaproponowano nową metodę modelowania dla celów analizy MPMS opartą na koncepcji binarnego diagramu decyzyjnego (binary decision diagram, BDD) oraz wielostanowego wielowartościowego diagramu decyzyjnego (multi-state multi-valued decision diagram, MMDD). Metoda ta polega na łączeniu różnych faz misji w obrębie systemu za pomocą pewnych reguł łączenia wedle czasu pracy wspólnego elementu składowego. Pozwala to na obliczanie niezawodności systemu za pomocą powszechnie stosowanych metod diagramów decyzyjnych poprzez generowanie drzew błędów. W pracy zaprezentowano dwa studia przypadku, które pokazują, w jaki sposób generuje się modele BDD/MMDD oraz ocenia niezawodność systemu. Wyniki eksperymentów wykazały wydajność oraz trafność proponowanych metod modelowania.
Źródło:
Eksploatacja i Niezawodność; 2017, 19, 3; 485-492
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability optimization design method based on multi-level surrogate model
Autorzy:
Li, Yong-Hua
Liang, Xiao-Jia
Dong, Si-Hui
Powiązania:
https://bibliotekanauki.pl/articles/1841935.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
Kriging model
reliability-based optimization
multi-level surrogate model
adaptive dynamic penalty function
Opis:
In this work, a genetic-algorithm-based Kriging model with multi-point addition sequence optimization strategy is addressed to make up for the shortcomings of Kriging model with single point criterion. This approach combines the multi-point addition strategy with genetic algorithm to enable the Kriging model to efficiently capture the globally optimal solution. Based on this, a multi-level surrogate method is presented by employing a local surrogate model to modify the Kriging global surrogate model, and then applied to design optimization to improve the accuracy and efficiency of global optimization. Meanwhile, a reliability design optimization method based on multi-level surrogate model is studied by dealing with the reliability constraints with an adaptive reliability penalty function. Numerical examples show that the proposed method can find the optimal solution of the object problem with the least calculation cost under the condition of satisfying the reliability constraint.
Źródło:
Eksploatacja i Niezawodność; 2020, 22, 4; 638-650
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of the portion of functional PS2 reaction centres in the light of a fluorometric study
Autorzy:
Ficek, D.
Ostrowska, M.
Kuzio, M.
Pogosyan, S.I.
Powiązania:
https://bibliotekanauki.pl/articles/48365.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
marine phytoplankton
variability
quantum yield
chlorophyll a
optical depth
PS2 reaction
environmental factor
photosynthetic apparatus
sea
fluorometric method
light
photosynthesis
Opis:
The paper contains a preliminary analysis of the links between the portion fc of functional PS2 reaction centres in the photosynthetic apparatus of marine phytoplankton and environmental factors. The analysis is based inter alia on fluorometric measurements of fc (see Kolber & Falkowski 1993) in water sampled from different depths and trophic types of sea. From the statistical generalisations was derived an analytical form of the relationship between fc, and the optical depth and trophic type of sea (the trophicity index was taken to be the surface concentration of chlorophyll a). According to this relationship, fc rises as the trophicity of the sea does so. Moreover, there is a certain optimal optical depth for each type of water at which the number of functional PS2 reaction centres reaches a maximum. Above or below this depth the value of fc falls. At the present stage of investigations it seems reasonable to assume that this drop in the number of functional PS2 reaction centres close to the surface is due to the destructive effect of excessive irradiance. On the other hand, their reduced number at greater depths, below the fc maximum, can be attributed to the deficit of light and the consequent destruction of reaction centres.
Źródło:
Oceanologia; 2000, 42, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hair toxic metal and metalloid levels in children with chronic sinusitis
Autorzy:
Alekseenko, S.I.
Tinkov, A.A.
Skalny, A.V.
Powiązania:
https://bibliotekanauki.pl/articles/14030.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2019, 24, 3
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Ball on SPS Characteristics of Ti-Al-Nd Powders Prepared by High Energy Ball Milling
Autorzy:
Lee, Hyunseung
Rhee, Hoseong
Lee, Sangsoo
Chang, Si Young
Powiązania:
https://bibliotekanauki.pl/articles/2203712.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high energy ball milling
STS
zirconia ball
SPS
Ti-Al-Nd alloy
microhardness
Opis:
The effects of different types of balls on spark plasma sintering (SPS) characteristics of high energy ball milled Ti-48wt% Al-4wt% Nd powders were investigated. After ball milling with STS balls and zirconia balls at 800 rpm for 3 h in argon atmosphere, both powders showed shape factors of about 0.8, but their average powder sizes differed respectively at approximately 11 µm and 5 µm. From XRD results, only the peaks of pure Ti, Al and Nd were detected in both powders. The obtained Ti-Al-Nd powders were consolidated by SPS technique at 1373 K for 15 min under a pressure of 50 MPa in vacuum, resulting in high density over 99%. EDS and XRD analyses indicated the formation of binary phases such as TiAl3, TiAl, Ti3Al5, and NdAl3 after SPS in both cases of STS and zirconia balls, while the ternary Ti-Al-Nd phase was detected only in the case of zirconia balls. The size of second phases was slightly smaller in the case of zirconia balls. The microhardness of the sample was 790 Hv with zirconia balls and 540 Hv with STS balls.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 81--84
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spark Plasma Sintering of Mn-Zn Ferrite Powders by High Energy Ball Milling
Autorzy:
Suh, Jun Young
Song, Yo-Seung
Chang, Si Young
Powiązania:
https://bibliotekanauki.pl/articles/351276.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high energy ball milling
nano-sized particles
SPS
conventional sintering
density
Opis:
The Mn-Zn ferrite powders prepared by high energy ball milling were heat-treated, subsequently compacted and sintered by spark plasma sintering (SPS). Based on the observation of microstructure, the characteristics of samples after SPS were investigated and compared with ones after conventional sintering. The size of initial powders was approximately 650 nm and decreased to 230 nm after milling at 300 rpm for 3 h. After heat treatment at 973 K for 1 h, the milled powders became larger to approximately 550 nm in size again and the peaks of Mn2 O3 disappeared in XRD patterns. In the samples after SPS, the Fe2 O3 and MnZnFe2 O4 phases decomposed at the higher temperatures than 1173 K and 1373 K, respectively, while only MnZnFe2 O4 phase was detected in the samples conventionally sintered at 1273~1673 K. As the sintering temperature increased, the relative density after SPS increased more quickly than that after conventional sintering. In particular, it reached approximately 99% after SPS at 1473 K.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 565-569
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Concentration of Defects at Grain Boundaries in Sintered Alumina Determined by Positron Annihilation Lifetime Spectroscopy
Autorzy:
Kansy, J.
Si Ahmed, A.
Liebault, J.
Moya, G.
Powiązania:
https://bibliotekanauki.pl/articles/2028969.pdf
Data publikacji:
2001-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
77.84.Bw
61.72.Mm
Opis:
Sintered alumina samples of grain diameters spanning from 1.2 to 4.5μm have been investigated by positron annihilation lifetime spectroscopy. One series of samples was produced from material containing about 150 ppm impurities (mainly SiO$\text{}_{2}$). The second one was made from material having about 2700 ppm of various elements (SiO$\text{}_{2}$, MgO, CaO). Two models of positron trapping at grain boundaries are compared: The first one relates to the diffusion-limited regime; and the other one - to the transition-limited regime of trapping. As a result the relative change of surface concentration of defects at grain boundaries is determined. Additionally, the positron diffusion constant in bulk alumina at room temperature, D$\text{}_{+}$=0.36±10 cm$\text{}^{2}$/s, is estimated.
Źródło:
Acta Physica Polonica A; 2001, 100, 5; 737-742
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of phytogenics on growth performance, fecal score, blood profiles, fecal noxious gas emission, digestibility, and intestinal morphology of weanling pigs challenged with Escherichia coli K88
Autorzy:
Mohana Devi, S.
Lee, S.I.
Kim, L.H.
Powiązania:
https://bibliotekanauki.pl/articles/30946.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Phytogenic feed additives have become attractive alternatives for use in animal diets. The objective of the present study was to evaluate the effect of a phytogenic-based feed additive on growth performance, nutrient digestibility, blood profiles, fecal noxious gas emission, and intestinal morphology of weaning pigs after dietary challenge with E. coli K88. A total of 120 crossbred pigs [(Yorkshire × Landrace) × Duroc)] with an initial body weight (BW) of 6.09 ± 0.96 kg (21 d of age) were assigned randomly to 1 of the 4 dietary treatments. Each pen housed 5 pigs, and there were 6 pens/treatment. Treatments included: T1, negative control (without antibiotics); T2, T1 + antibiotic; T3, T1 + 0.05% phytogenics; and T4, T1 + 0.2% commercial mix of organic acids. Overall, the average daily gain (ADG) with the T3 treatment was higher (P<0.05). At wk 1, the apparent total tract digestibility (ATTD) of dry matter (DM) was increased (P<0.05) with T4 treatment. The ATTD of ash with T3 and T4 treatments was greater (P<0.05). At wk 3, pigs fed with the T4 diet had a significantly higher (P<0.05) ATTD of DM. The ATTD of ash and calcium (Ca) was significantly increased (P<0.05) with the T4 treatment. Pigs fed with the T3 diet had a higher (P<0.05) ATTD of phosphorus (P). At wk 6, the ATTD of ash was significantly increased (P<0.05) with the T1 and T3 treatments. The data indicate that phytogenics positively affect growth performance of weaning pigs, indicating that their use as an alternative in the diets of weaning pigs can significantly improve ADG, under challenge with E.coli K88.
Źródło:
Polish Journal of Veterinary Sciences; 2015, 18, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deflectometry for phase retrieval using a composite fringe
Autorzy:
Liu, T.
Zhou, C.
Liu, Y
Si, S
Lei, Z.
Powiązania:
https://bibliotekanauki.pl/articles/173892.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wavefront measurement
fringe analysis
phase retrieval
fast Fourier transform (FFT)
multifrequency heterodyne principle
Opis:
An improved deflectometry for wavefront measurement using a composite fringe is proposed to reduce the projection fringes and improve the accuracy. The single composite fringe contains four fringes in different directions. It goes through the tested objects and then is captured by a CCD camera. Two high frequency orthogonal fringe patterns and two single period orthogonal fringe patterns can be obtained from the composite fringe by fast Fourier transform. The unwrapping of the wrapped phase of the high frequency fringe is accomplished by the corresponding single period fringe using a heterodyne method. The wavefront is reconstructed by the integration of partial derivatives. Using only one fringe, the proposed method is more applicable to dynamic wavefront measurement. The experimental results demonstrate that the proposed method can retrieve the complex wavefronts more accurately.
Źródło:
Optica Applicata; 2014, 44, 3; 451-461
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recovery of pure palladium compound from the spent electroplating solutions by hydrometallurgical method
Autorzy:
Nguyen, Viet Nhan Hoa
Song, Si Jeong
Lee, Man Seung
Powiązania:
https://bibliotekanauki.pl/articles/2146854.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
leaching
solvent extraction
palladium
separation
precipitation
Opis:
Electroplating of palladium (Pd) is practiced in the manufacture of electronic materials. The increasing demand for Pd metal necessitates the recovery of Pd(II) from the spent electroplating solutions. In this work, the recovery of Pd compound was studied from the cemented Pd by zinc (Zn) metal from spent electroplating solutions. Initially, the selective extraction ability of ionic liquids synthesized from commercial extractants for Pd(II) over Zn(II) from the synthetic HCl solution was investigated. Pd(II) was selectively extracted over Zn(II) from 9 M HCl solution by ALi-CY301(Nmethyl-N,N,N-trioctylammonium bis(2,4,4-trimethylpentyl) dithiophosphinic) and by ALi-I (N-methylN,N,N-trioctylammonium iodide) from weak HCl solution (pH 1). Since 9 M HCl was needed to completely dissolve Pd from the cemented Pd, ALi-CY301 was employed for the separation of Pd(II) and Zn(II) from the real HCl leaching solution of the cemented Pd. Two-stages counter-current extraction of the real HCl solution with ALi-CY301 resulted in selective extraction of Pd(II). Pd(II) was effectively stripped from the loaded ALi-CY301 by a mixture of HCl and NaClO. After oxidizing Pd(II) in the stripping solution to Pd(IV) by adding NaClO, Pd(IV) compound was synthesized by adding NH4Cl as a precipitant. By comparing leaching and extraction efficiency between hydrochloric and sulfuric acid solutions, a hydrometallurgical process consisted of HCl leaching, extraction with ALiCY301 and precipitation with NH4Cl was recommended for the recovery of pure (NH4)2PdCl6 from the cemented Pd.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 1; 88--100
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on screening performance and parameters optimization of double relatively independent vibrating screen
Autorzy:
Li, Zhanfu
Hu, Yunxiao
Jia, Peiyu
Si, Qiming
Tong, Xin
Powiązania:
https://bibliotekanauki.pl/articles/2146862.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
RSM
non parallel
DEM-MBD co-simulation
relatively independent
Opis:
In view of the existing double-layer linear vibrating screen, the screen surface inclination angle is basically parallel design. This paper puts forward a double-layer non-parallel and relatively independent vibrating screen. Experimental prototype of double-layer relatively independent vibrating screen under variable parameters was manufactured to verify the feasibility of simulations. This paper applied the single-factor tests to establish relationships between screening parameters of double-layer non-parallel and relatively independent vibrating screen and screening performance. What’s more, the combination of screening parameters was optimized using the response surface method (RSM). The optimal combination after the round is as follow: vibration frequency 35 Hz, the angle of eccentric block 14.2°, the inclination of the upper screen 14.6° and the inclination of the lower screen 8.8°.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 6; 156--168
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poverty and its alleviating strategies among rural farming households in Benue state, Nigeria
Autorzy:
Upev, S.K.
Onu, J.I.
Mshelia, S.I.
Michael, A.
Powiązania:
https://bibliotekanauki.pl/articles/2080940.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
poverty
alleviating strategies
rural
farming household
Nigeria
Opis:
The study analysed rural farming households’ poverty status and alleviating strategies in Benue State, Nigeria. The specific objectives of the study were to: describes the rural household heads’ socio-economic characteristics; determine the poverty status of the respondents and its determinants; and identify poverty alleviating strategies of the respondents. Data for the study was collected from 420 respondents selected using a multi-stage sampling technique. Data collected were analysed using descriptive statistics, the Foster-Greer-Thorbecke poverty measurement index, and the Binary Logistic regression model. The findings of the study revealed a very high incidence of poverty (70%), having a gap of 0.34, and severity of 0.17. Poverty in the area is positively associated with the age of the household head and household size, while gender, educational level, off-farm activity, membership of a group, farm size, and land ownership are negatively associated with poverty. The common poverty alleviation strategies identified were agricultural wage labour (48.6%), rental services (45.0%), and transportation business (36.7%). Therefore, it was recommended that the government and other stakeholders should initiate sustainable social protection schemes that can assist rural residents in alleviating poverty until their condition improves.
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2021, 21[36], 2; 33-44
2081-6960
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Еvaluation of health status of children attending primary schools with different organization of physical education lessons
Autorzy:
Kondratiuk, O.S.
Korshun, M.M.
Garkavyi, S.I.
Garkavyi, S.S.
Powiązania:
https://bibliotekanauki.pl/articles/874642.pdf
Data publikacji:
2018
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. The mandatory swimming lesson in primary schools, equipped with swimming pools, was introduced without studying of its health-saving effectiveness. Objective. The purpose of this study was to evaluate the health status of pupils studying in schools with different organization of physical education lessons. Materials and Methods. Cross-sectional study was organized in two schools with different organization of physical education lessons. The experimental group (E) consisted of 408 children of 1‑4 year of study (210 girls and 198 boys) who during one of the lessons of physical education were engaged in swimming in the school basin. Control group (C) consisted of 279 primary school children (210 girls and 156 boys) from a neighboring educational institution where all physical education lessons were organized in the gym. The health status was evaluated using classical method of complex assessment of the state of health with the subsequent assignment of each child to one of the health groups. Results. In result of evaluation of state of health there was established that among pupils from E group the proportion of boys with harmonious anthropometric parameters is higher (p<0.05), children from this group are stronger than C group (p<0.05). The prevalence of diseases of the musculoskeletal system and the eyes among pupils in E group was lower comparing to the C group (p<0.01). In the E group percentage of pupils assigned to health group I was significantly higher and lower for the II (children with some morpho-functional abnormalities) comparing to the C group. Conclusion. Organization of one mandatory swimming lesson per week in primary school has positive effect on health status of children.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2018, 69, 2
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solvent extraction of Terbium(III) from chloride solution using organophosphorus extractant, its mixture and ionic liquid in the presence of organic acids
Autorzy:
Tran, Thanh Tuan
Song, Si Jeong
Oh, Chang Geun
Lee, Man Seung
Powiązania:
https://bibliotekanauki.pl/articles/24085863.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
extraction
Terbium(III)
organic acid
ionic liquid
buffer effect
Opis:
Addition of organic acids to dilute hydrochloric acid solution can improve the extraction of rare earth elements by single cationic extractants. However, the correlation between the chemical structure of organic acids and the extraction of REEs as well as the variation in equilibrium pH has not been elucidated. In this study, we investigated the extraction of Tb(III) from dilute HCl solutions containing an organic acid like formic, lactic, fumaric, or maleic acid. As extractants, single Cyanex 272, a mixture of Cyanex 272 and Alamine 336 (Ala336-Cy272), and an ionic liquid (ALi-Cy272) synthesized by Cyanex 272 and Aliquat 336 were used. The speciation of Tb(III) in dilute HCl solutions containing organic acids was analyzed. In extraction of Tb(III), organic acids showed two roles as complexing and buffering agent, which depended on the chemical structure of the acids. There was some difference in the extraction of Tb(III) between single Cyanex 272 and ionic liquid, ALi-Cy272. During extraction with ALi-Cy272, formic and lactic acid negatively affected the extraction of Tb(III). The fact that the chemical structure of organic acids affected the extraction of Tb(III) from dilute HCl solution by the studied extractants can provide important information on the selection of suitable extraction systems.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 162714
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Explosive crystallisation of metal glasses based on Fe-B during pulsed laser heating. Experiment and modelling
Autorzy:
Smolyakov, O.V.
Girzhon, V.V.
Mudry, S.I.
Nykyruy, Y.S.
Powiązania:
https://bibliotekanauki.pl/articles/24200617.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
explosion
crystallisation
metallic glass
structure modelling
eksplozja
krystalizacja
szkło metaliczne
modelowanie struktury
Opis:
Purpose: The structure evolution of amorphous metallic alloys during different kinds of thermal effects is an important problem of disordered systems physics. A precise evolutional model would allow predicting the formation of such a structural state, providing the necessary physical and mechanical alloy properties. Design/methodology/approach: The paper is devoted to the problem of modelling the explosive crystallisation process in metal glasses induced by laser, supplemented by experimental results. Findings: A theoretical model of laser-induced explosive crystallisation in metal glasses is proposed. A pulse laser heating method for the surface processing was developed, making it possible to obtain two-layer structures with an adjustable thickness of the amorphous crystalline layer. Research limitations/implications: The proposed model is assumed to test and optimes for metal glasses of other chemical compositions. Practical implications: A theoretical model of laser-induced explosive crystallisation in metal glasses allows for predicting and controlling structure changes to obtain the desired properties. Originality/value: The investigation of structure changes at rapid heating of amorphous alloys by experimental methods is very limited in obtaining data and their interpretation. For that reason, combining the modelling with experimental measurements is proposed. The results of this work have value for a scientist in material science, physics and engineering, which use nonequilibrium physical processes to obtain new materials, including nanoscale systems.
Źródło:
Archives of Materials Science and Engineering; 2023, 119, 2; 49--55
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review on Oxide Formation and Aluminum Recovery Mechanism during Secondary Smelting
Autorzy:
Osoba, L.O.
Owolabi, O.B.
Talabi, S.I.
Adeosun, S.O.
Powiązania:
https://bibliotekanauki.pl/articles/106915.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Al dross
Al recovery
hydrometallurgy
oxidation
oxide film
Opis:
The remelting, refining, and casting process of aluminum alloys often generate aluminum dross containing primarily oxides and nitrides of aluminum and entrapped metallic aluminum at the surface of the molten metal as a result of reactions within the furnace atmosphere at elevated temperatures. The handling of dross is an expensive but necessary activity during aluminum smelting. Furthermore, the amorphous Al2O3 oxide film formed on the pure molten aluminum surface due to the liquid metal randomly distributed atoms is impermeable to the diffusion of aluminum metal and oxygen. In amorphous materials, there is a low mobility of the charge carriers and an absence of preferred diffusion paths. This film can transform to crystalline Al2O3 by nucleation and grows with time and opportunity. This review discusses the mechanism of oxide formation and the aluminum metal recovery processes.
Źródło:
Journal of Casting & Materials Engineering; 2018, 2, 2; 45-51
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 78

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