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Tytuł:
Investigating the content of microplastics and other extraneous particles in Polish bottled water
Autorzy:
Aleksander-Kwaterczak, Urszula
Gaj, Dominika
Stelmach, Alex
Wróbel, Tomasz P.
Powiązania:
https://bibliotekanauki.pl/articles/27310134.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
plastic bottles
drinking water
solid particles
polymers
microplastics
FT-IR spectroscopy
Opis:
Bottled water has enjoyed a global increase in popularity since it is generally perceived to be superior in quality to tap water and necessary when tap water is non-potable. As a result, ensuring that it meets the requisite quality standards is of vital importance. This work aims to examine the content of solid particles, including microplastics, in bottled water available in Polish stores. The second aspect is the preliminary determination of the influence of the water gassing process, together with thermal and light factors, on the content of particles in the water. The number of particles was counted by colour and shape, with the number ranging from 87 to 188 per litre of water; on average, there were 136 ±32 particles per litre of water, demonstrating that water from disposable plastic bottles is contaminated with various substances. The difference in the number of particles may be due to the origin of the waters, the processes they were subjected to prior to bottling, the properties of the bottles as packaging, and the conditions and length of storage and transport. Additional Fourier-transform infrared spectroscopy (FT-IR) analysis confirmed that about 75% of the particles were polymers, and 50% of them were plastics. Particularly alarming is the fact that the bottled waters mostly contained microplastic particles (MP) of smaller sizes, the kind which is recognized as being the most dangerous to human health. In the study, most particles were in the form of irregular shapes, which may indicate that they come from the destruction of waste or plastic products. This is also indicated by the domination of colourless particles. More particles were found in waters exposed to high and low temperatures than in waters stored at room temperature, potentially indicating that storage conditions for drinking water are important. Taking into account the results obtained, increasing attention should be paid to the health risks posed by such microplastics and there is a clear need to introduce legal regulations on the matter. The lack of any legal guidelines or unified standards in the field of MP research means that the results are not always representative, and it also makes it difficult to compare the results from different studies.
Źródło:
Geology, Geophysics and Environment; 2023, 49, 4; 335--353
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-technique characterisation of InAs-on-GaAs wafers with circular defect pattern
Autorzy:
Boguski, Jacek
Wróbel, Jarosław
Złotnik, Sebastian
Budner, Bogusław
Liszewska, Malwina
Kubiszyn, Łukasz
Michałowski, Paweł P.
Ciura, Łukasz
Moszczyński, Paweł
Odrzywolski, Sebastian
Jankiewicz, Bartłomiej
Wróbel, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2204219.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
wafer homogeneity
wafer defect pattern
surface roughness
indium arsenide
beryllium doping
Opis:
The article presents the results of diameter mapping for circular-symmetric disturbance of homogeneity of epitaxially grown InAs (100) layers on GaAs substrates. The set of acceptors (beryllium) doped InAs epilayers was studied in order to evaluate the impact of Be doping on the 2-inch InAs-on-GaAs wafers quality. During the initial identification of size and shape of the circular pattern, non-destructive optical techniques were used, showing a 100% difference in average roughness between the wafer centre and its outer part. On the other hand, no volumetric (bulk) differences are detectable using Raman spectroscopy and highresolution X-ray diffraction. The correlation between Be doping level and circular defect pattern surface area has been found.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144564
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of chemical compounds contained in a diet on the development and prevention of urolithiasis
Autorzy:
Zielinski, P.
Krupinska, J.
Wrobel, G.
Powiązania:
https://bibliotekanauki.pl/articles/1192790.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
urolithiasis
chemical factors
nutrition
diet
Opis:
Urolithiasis is one of the most common diseases of the genitourinary system. The conditions associated with the development of urolithiasis show a wide variety, among which dietary behaviour is of great importance and is nowadays becoming increasingly important in the development of kidney stones. The aim of this study was to review the literature about the impact of chemical compounds contained in a diet on the development and prevention of urolithiasis. Factors impeding the proper absorption of calcium include phosphates, fatty acids, sulphates, citrates, oxalates, while the factor that stimulates the absorption of calcium in the intestines is the active form of vitamin D3. In this regard, one should consider the amount of calcium, sodium, potassium, animal protein and simple carbohydrates consumed in a diet, as well as dietary habits regarding caffeine and alcohol. Also significant is the fact that a poorly balanced diet may condition hypercalciuria. In the case of excessive consumption of other compounds, such as simple carbohydrates and ethyl alcohol, increased urinary calcium excretion is observed, caused by disturbances in the tubular reabsorption of calcium and magnesium in nephrons. Nowadays, prophylaxis is gaining importance in the light of the growing number of cases of urolithiasis worldwide. A well-designed diet is a crucial element, affecting both the formation of deposits and treatment, hence sound knowledge of the principles of proper nutrition can significantly reduce the risk of the recurrence of renal colic. The most common cause of urolithiasis are nutritional errors, and the onset of treatment is associated with a change in dietary habits. The general nutritional recommendations for urolithiasis should be adapted to the type of urinary stones deposit and an individual patient’s comorbidities. A tailored approach to combating the disease is required.
Źródło:
Journal of Elementology; 2021, 26, 1; 163-179
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Hyperquenching Temperature on Microstructure and Mechanical Properties of Alloy Cast Steel GX2CrNiMoCuN 25-6-3-3
Autorzy:
Jurczyk, P.
Wróbel, T.
Baron, C.
Powiązania:
https://bibliotekanauki.pl/articles/2049633.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
duplex cast steel
heat treatment
mechanical properties
microstructure
Opis:
The paper presents the research results concerning the chromium-nickel-molybdenum duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade. The aim of studies was the description of the influence of hyperquenching temperature Tp i.e. 1100, 1125 and 1150°C on microstructure and mainly mechanical properties i.e. tensile strength UTS, yield strength YS, hardness HB, elongation EL and impact energy KV of duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade. The range of studies included ten melts which were conducted in foundry GZUT S.A. Based on the obtained results was confirmed that application of hyperquenching process guarantees the elimination of brittle s phase in the microstructure of studied duplex cast steel. Moreover on the basis of conducted statistical analysis of the researches results is concluded that with the decrease in hyperquenching temperature increases ductility and amount of austenite, while decreases strength and amount of ferrite in studied duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 73-80
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the impact of sodium and potassium metabolism in women undergoing hysteroscopy due to pathological uterine bleeding
Autorzy:
Zielinski, P.
Szeszko, L.
Krupinska, J.
Wrobel, G.
Szeszko, A.
Oszukowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1192474.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
gynaecology
menstruation
menstrual disorders
abnormal uterine bleeding
kalium
natrium
endomentrial hyperplasia
endometrial polyp
heavy menstruation
uterine fibroids
Opis:
Monitoring the water and electrolyte balance is an integral part of diagnostics and designing an effective therapy of many diseases. Sodium and potassium play a crucial role in the diagnosis of water and electrolyte disorders. The study was conducted to demonstrate the relationship between the occurrence of electrolyte disturbances in women undergoing hysteroscopy due to pathological uterine bleeding. Medical records of 543 patients aged 21-88 (52.8±11.8 years) hospitalized in the Gynecology and Obstetrics Department of the Provincial Specialist Hospital in Biała Podlaska, who underwent hysteroscopic diagnostics due to pathological bleeding from the uterus were collected. 212 women (39.04%) were diagnosed with pathological bleeding from the uterus, 147 women (27.07%) had endomentrial hyperplasia, 104 women (19.15%) were diagnosed with an endometrial polyp, 62 women (11.42%) suffered from heavy menstruations and 18 women (3.3%) had uterine fibroids. The sodium and potassium concentrations were measured using an automated Cobas® 8000 analyzer (Roche). The average concentration of sodium in the serum was 139.84±2.13 mmol L-1 (χ 2 = 35.079; P<0.001), and the average potassium concentration was 4.44±0.37 mmol L-1 (χ 2 = 36.019; P<0.001). Higher values for sodium were recorded in the group of patients with adenomyosis (140.41±2.27 mmol L-1) and patients with uterine fibroids (140.11±1.94) mmol L-1). Statistically significant differences were found in mean sodium concentration values depending on the causes of patients’ hospitalization (H=33.914; P<0.001), and the biggest differences were between patients with ovulation disorders and patients with adenomyosis: 138.86±0.21 mmol L-1 vs. 140.41±2.27 mmol L-1 (Z=5.169; P<0.001). It seems important add measurements of sodium and potassium concentrations to the profile of tests performed in the diagnosis of gynaecological patients referred for hysteroscopy for the reasons presented in the study in order to reduce the risk of complications associated with the loss of these elements.
Źródło:
Journal of Elementology; 2020, 25, 3; 1199-1212
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-drug combination of lacosamide, phenobarbital and valproate exerts additive interaction in the tonic-clonic seizure model in mice
Autorzy:
Kondrat-Wrobel, M.
Marzeda, P.
Bojar, H.
Wroblewska-Luczka, P.
Kozinska, J.
Jankiewicz, M.
Kominek, M.
Luszczki, J.J.
Powiązania:
https://bibliotekanauki.pl/articles/2097824.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
valproate
drug interactions
phenobarbital
isobolographic analysis
lacosamide
Tonic-clonic seizures
Opis:
Introduction. Triple-therapy with antiepileptic drugs (AEDs) is usually prescribed for epilepsy patients, whose seizures are not fully controlled with standard medications. Although 25 various AEDs are currently licensed for treating epilepsy, no algorithms allowing for the proper combination of AEDs are available. Objective. The aim of the study is to isobolographically assess the type of interaction among three AEDs (lacosamide [LCM], phenobarbital [PB] and valproate [VPA]), in the model of tonic-clonic seizures in mice. Materials and Method. The electrically-evoked (25 mA, 500 V, 50 Hz, 0.2 s of stimulus duration) tonic-clonic seizures in male albino Swiss mice allowed determination of the anticonvulsant action of the three-drug mixture of LCM, PB and VPA combined in a dose ratio of 1:1:1 by means of type I isobolographic analysis of interaction. Results. The experimentally-determined ED50 exp value for the three-drug mixture was 112.04 mg/kg and did not differ from the theoretically calculated ED50 add value, which was 112.36 mg/kg. Lack of statistical significance confirmed that the mixture of LCM, PB and VPA in a dose-ratio of 1:1:1 exerted additive interaction in the mouse tonic-clonic seizure model. Conclusions. Although the three-drug combination of LCM, PB and VPA produced additive interaction in the mouse tonic-clonic seizure model, the three-drug combination could be recommended for epilepsy patients whose seizures are refractory to the standard medication.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2020, 14, 3; 102-106
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Thermal Stability of Intermetallic Phases Precipitates in Continuous Ingots of AlCu4MgSi Alloy
Autorzy:
Nuckowski, P. M.
Kondracki, M.
Wróbel, T.
Powiązania:
https://bibliotekanauki.pl/articles/382300.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium alloys
phase analysis
high temperature X-ray diffraction
thermal-derivative analysis
stopy aluminium
analiza fazowa
wysokotemperaturowa dyfrakcja rentgenowska
analiza termopochodna
Opis:
The article presents the results of research concerning to AlCu4MgSi alloy ingots produced using horizontal continuous casting process. The presented research was focused on the precise determination of phase composition of the precipitates formed during the solidification of ingots and the analysis of their thermal stability. In order to assess the morphology of precipitates in the AlCu4MgSi alloy, data obtained by using a computer simulation of thermodynamic phenomena were compiled with results obtained using advanced research techniques, i.e. High-temperature X-ray diffraction (HT-XRD), SEM-EDS, Thermal and derivative analysis (TDA) and Glow discharge optical emission spectroscopy (GD OES). SEM observations and analysis of chemical composition in micro-areas showed that the precipitates are mainly intermetallic θ-Al2Cu and β-Mg2Si phases, and also presence of Al19Fe4MnSi2 intermetallic phase was confirmed by X-ray diffraction studies. Based on the prepared Thermo-Calc simulation data, high-temperature X-ray diffraction measurements were conducted.
Źródło:
Archives of Foundry Engineering; 2019, 4; 99-104
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antagonistic interaction of lacosamide with carbamazepine and valproate in the mouse tonic-clonic seizure model
Antagonistyczna interakcja lakozamidu z karbamazepiną i walproainianem w modelu drgawek toniczno-klonicznych u myszy
Autorzy:
Kondrat-Wróbel, M.W.
Załuska, K.
Walczak, A.
Panasiuk-Poterek, A.N.
Gut-Lepiech, A.
Wróblewska-Łuczka, P.
Łuszczki, J.J.
Powiązania:
https://bibliotekanauki.pl/articles/2053463.pdf
Data publikacji:
2019
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
antiepileptic drugs
isobolography
maximal electroshock
three-drug combination
antagonism
leki przeciwpadaczkowe
izobolografia
elektrowstrząsy
kombinacja trzech leków
antagonizm
Opis:
Background. It is estimated that approximately 1% of people worldwide suffer from epilepsy. Currently available antiepileptic drugs (AEDs) are able to control epileptic seizures in about 70% of cases. In the remaining patients (30%), the application of two or three AEDs in combination is necessary for effective seizure management. The goal of this work was to characterize the interaction of three AEDs: lacosamide (LCM), carbamazepine (CBZ) and valproate (VPA) at the fixed-ratio of 1:1:1 in the mouse tonic-clonic seizure model. Material and methods. Male albino Swiss mice, after receiving a combination of LCM, CBZ and VPA, were challenged with electric current to evoke tonic hind limb extension (seizure activity). Protection of the mice from tonic-clonic seizures was assessed by isobolographic analysis to determine the type of interaction occurring between these drugs. Results. Type I isobolographic analysis revealed that the combination of LCM, CBZ and VPA produced infra-additive (antagonistic) interaction in the mouse tonic-clonic seizure model. Conclusions. Since the three-drug mixture of LCM, CBZ a nd VPA exerted an antagonistic interaction in the tonic-clonic seizure test in mice, we would caution physicians against treating epilepsy patients with this unfavorable combination.
Wprowadzenie. Szacuje się, że około 1% osób na całym świecie cierpi na padaczkę. Obecnie dostępne leki przeciwpadaczkowe pozwalają na opanowanie napadów padaczkowych w około 70% przypadków. U pozostałych pacjentów z padaczką (30%) konieczne jest zastosowanie dwóch lub trzech leków przeciwpadaczkowych w kombinacji. Celem pracy było scharakteryzowanie interakcji między trzema lekami przeciwpadaczkowymi: lakozamidem (LCM), karbamazepiną (CBZ) i walproinianem (VPA) w stałym stosunku dawek 1:1:1 w modelu drgawek toniczno-klonicznych u myszy. Materiał i metody. Samce myszy albino Swiss, po otrzymaniu kombinacji LCM, CBZ i VPA, poddano działaniu prądu elektrycznego, aby wywołać toniczny wyprost kończyn tylnych (aktywność drgawkową). Ochronę myszy przed napadami toniczno-klonicznymi oszacowano za pomocą analizy izobolograficznej, aby określić typ interakcji zachodzącej między tymi lekami. Wyniki. Analiza izobolograficzna typu I ujawniła, że kombinacja LCM, CBZ i VPA powodowała oddziaływanie infra-addytywne (antagonistyczne) w modelu drgawek toniczno-klonicznych u myszy. Wnioski. Ponieważ trójlekowa mieszanina LCM, CBZ i VPA wywierała antagonistyczną interakcję w teście napadów toniczno-klonicznych u myszy, specjalne ostrzeżenie jest konieczne dla lekarzy, aby nie leczyć pacjentów z padaczką tą niekorzystną kombinacją.
Źródło:
Health Problems of Civilization; 2019, 13, 1; 92-98
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the Stress Relaxation of Biodegradable Surgical Threads Made of Mg and Zn Alloys and Some Commercial Synthetic Materials
Autorzy:
Milenin, A.
Kustra, P.
Wróbel, M.
Paćko, M.
Byrska-Wójcik, D.
Powiązania:
https://bibliotekanauki.pl/articles/352186.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ax30
Zn
surgical threads
relaxation
mechanical properties
Opis:
The mechanical properties of the commercial synthetic surgical threads (i.e., monofilament MonosynR and polyfilament PolysorbTM) and threads made of pure zinc and selected magnesium alloys were compared. Tensile and relaxation tests of fine fibers/wires without and with a surgical knot were performed on a Zwick 250 tensile machine and on the specially constructed tensile machine dedicated for ultra-thin samples. An about 50% decrease in the maximum tensile load was registered for both synthetic and Mg-based threads due to the presence of a surgical knot while only an about 10% decrease was documented for the zinc threads.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 1139-1143
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties and fracture analysis of AlCu4MgSi alloy ingots obtained by horizontal continuous casting
Autorzy:
Nuckowski, P. M.
Wróbel, T.
Powiązania:
https://bibliotekanauki.pl/articles/352196.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AlCu4MgSi alloy
horizontal continuous casting
fracture analysis
mechanical properties of ingots
aluminum
Opis:
The article presents the results of research concerning AlCu4MgSi alloy ingots produced using horizontal continuous casting process under variable conditions of casting speed and cooling liquid flow through the crystallizer. The mechanical properties and structure of the obtained ingots were correlated with the process parameters. On the basis of the obtained results, it has been shown that depending on the cooling rate and the intensity of convection during solidification, significant differences in the mechanical properties and structure and of the ingots can occur. The research has shown that, as the casting speed and the flow rate of the cooling liquid increase, the hardness of the test samples decreases, while their elongation increases, which is related to the increase of the average grain size. Also, the morphology of the intermetallic phases precipitations lattice, as well as the centerline porosity and dendrite expansion, significantly affect the tensile strength and fracture mechanism of the tested ingots.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 113-118
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary results of a system-theoretic assessment of maritime autonomous surface ships’ safety
Autorzy:
Wróbel, K.
Krata, P.
Montewka, J.
Powiązania:
https://bibliotekanauki.pl/articles/117567.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Maritime Autonomous Surface Ships (MASS)
autonomous ship
MUNIN project
Advanced Autonomous Waterborne Application (AAWA)
System-Theoretic Process Analysis (STPA)
System-Theoretic Accident Model and Process (STAMP)
unmanned shipping system
safety at sea
Opis:
While a system-theoretic approach to the safety analysis of innovative socio-technical systems gains a growing acceptance among academia, safety issues of Maritime Autonomous Surface Ships (MASS) remain largely unexplored. Therefore, we applied a System-Theoretic Process Analysis to develop and analyze a preliminary model of the unmanned shipping system in order to elaborate safety recommendations for future developers of the actual system. Results indicate that certain advancements shall be undertaken in relation to MASS’ software solutions in particular.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 717-723
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxicity of parasites and their unconventional use in medicine
Autorzy:
Król, G.
Tomaszewska, A.
Wróbel, G.
Paprocka, P.
Durnaś, B.
Piktel, E.
Bucki, R.
Powiązania:
https://bibliotekanauki.pl/articles/2085134.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
parasites
toxicity
helminth therapy
Opis:
Introduction. Over 300 species of parasites can possibly be passed on humans. Most of the parasitic infections are defined based on their pathogenicity; however, some positive effects of a parasite existence within the human body have recently been suggested. Beneficial outcomes of parasite infections might result from the production and release of metabolites, modification of host immune response or products uptake of the host. Objective. The aim of the study was a comprehensive analysis of a wide range of effects of parasites on the human body, including an overview of the toxic and positive effects. State of knowledge. In the light of the latest research presenting the unconventional use of parasites in medicine, the widely understood of their impact on the human body can also be considered in a positive context. Clinical cases from diseases caused by the toxic effects of parasites, as described in recent years, indicate that the problem of parasitic infections still persists. Despite a great deal of knowledge about the toxic effects of parasites on the human organism and, above all, despite the improvement in sanitary conditions, there is a resurgence of parasitic infections, as evidenced, e.g. by the examples presented in this review. Conclusions. The examples of positive effects of parasites presented so far give hope for the future in terms of fighting many diseases for which pharmacological treatment has not yet brought a positive effect. A better understanding of those processes might lead to the development of new methods of unconventional medical treatment.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 4; 523-531
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An accurate fingerprint reference point determination method based on curvature estimation of separated ridges
Autorzy:
Doroz, R.
Wrobel, K.
Porwik, P.
Powiązania:
https://bibliotekanauki.pl/articles/331403.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
biometrics
image processing
fingerprint recognition
Kolmogorov–Smirnov statistical test
reference point
biometria
przetwarzanie obrazu
rozpoznawanie linii papilarnych
test statystyczny
punkt odniesienia
Opis:
This paper presents an effective method for the detection of a fingerprint’s reference point by analyzing fingerprint ridges’ curvatures. The proposed approach is a multi-stage system. The first step extracts the fingerprint ridges from an image and transforms them into chains of discrete points. In the second step, the obtained chains of points are processed by a dedicated algorithm to detect corners and other points of highest curvature on their planar surface. In a series of experiments we demonstrate that the proposed method based on this algorithm allows effective determination of fingerprint reference points. Furthermore, the proposed method is relatively simple and achieves better results when compared with the approaches known from the literature. The reference point detection experiments were conducted using publicly available fingerprint databases FVC2000, FVC2002, FVC2004 and NIST.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 209-225
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crisis Management Model for Large Urban Agglomerations
Model zarządzania kryzysowego dużą aglomeracją miejską
Autorzy:
Szczurek, T.
Bryczek-Wróbel, P.
Powiązania:
https://bibliotekanauki.pl/articles/373504.pdf
Data publikacji:
2018
Wydawca:
Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego
Tematy:
crisis management
agglomeration
public administration
security
zarządzanie kryzysowe
aglomeracja
administracja publiczna
bezpieczeństwo
Opis:
Purpose: Presentation of a model solution for a crisis management system for large urban agglomerations, assuming that such a model should form part of the current crisis management structure at the national and provincial levels. Introduction: The intensive urbanisation of areas adjacent to large urban centres poses new challenges for the crisis management system. There are two types of agglomerations in Poland, namely monocentric agglomerations consisting of smaller towns concentrated around one large city (e.g., Warsaw agglomeration) and polycentric agglomerations consisting of several or more large cities (e.g., Silesian agglomeration). In each agglomeration – regardless of its type – there is a so-called “leading city”, which is the capital city of the province and at the same time the city with the district rights. An example of such a city is Warsaw, where the crisis management system has been functioning well for several years and it is different than in other agglomerations. Therefore, it seems reasonable to examine whether it would be possible to create a crisis management system model for other Polish agglomerations based on the Warsaw practices. Methodology: A comparative analysis of selected agglomerations and crisis management frameworks across entities forming these agglomerations was used to find the baseline data for the model solution. The evaluation of the existing solutions at the Warsaw agglomeration level was obtained through a diagnostic survey conducted among the employees of local government administration. Conclusions: The results of our diagnostic survey support the crisis management model adopted in Warsaw. The model solution for the crisis management system for large urban agglomerations may be based on solutions adopted and well tried in the Capital City of Warsaw. The model takes into account the creation of the Security and Crisis Management Office for the Agglomeration (BBiZKA) directly subordinate to the Mayor of the provincial city. A strong crisis management centre of the agglomeration would be a permanent element of BBiZKA, the Agglomeration Crisis Management Team would be the advisory element for the Mayor of the city. The Security and Crisis Management Office for the Agglomeration could be established at the expense of the liquidation of dispersed crisis management centres in the cities and municipalities forming the agglomeration. In the national crisis management system, the Crisis Management Centre of the Agglomeration would – as in the case of Warsaw – be subordinated to the Provincial Crisis Management Centre.
Cel: Przedstawienie rozwiązania modelowego dla systemu zarządzania kryzysowego dużą aglomeracją miejską, przy założeniu, że model taki powinien się wpisywać w aktualnie obowiązującą strukturę zarządzania kryzysowego na szczeblu kraju i województwa. Wprowadzenie: Intensywna urbanizacja terenów przyległych do dużych ośrodków miejskich stwarza nowe wyzwania przed systemem zarządzania kryzysowego. W Polsce występują dwa rodzaje aglomeracji. Aglomeracje monocentryczne składające się z mniejszych miejscowości skupionych wokół jednego dużego miasta (np. aglomeracja warszawska) oraz aglomeracje policentryczne składające się z kilku lub kilkunastu dużych miast (np. aglomeracja śląska). W każdej aglomeracji – niezależnie od typu – występuje tzw. „miasto wiodące”, którym jest stolica województwa i jednocześnie miasto na prawach powiatu. Takim miastem jest Warszawa, w której od kilku lat dobrze funkcjonuje – inny niż w pozostałych aglomeracjach – system zarządzania kryzysowego. Wydaje się zatem zasadne zbadanie, czy w oparciu o wzorce warszawskie nie można byłoby stworzyć modelu systemu zarządzania kryzysowego dla innych polskich aglomeracji. Metodologia: W poszukiwaniu danych wyjściowych dla rozwiązania modelowego zastosowano analizę porównawczą wybranych aglomeracji i struktur zarządzania kryzysowego podmiotów tworzących te aglomeracje. Ocenę dotychczasowych rozwiązań na szczeblu aglomeracji warszawskiej uzyskano metodą sondażu diagnostycznego przeprowadzonego wśród pracowników administracji samorządowej. Wnioski: Wyniki sondażu diagnostycznego przemawiają na korzyść przyjętego w Warszawie modelu zarządzania kryzysowego. Modelowe rozwiązanie dla systemu zarządzania kryzysowego dużą aglomeracją miejską może być oparte na rozwiązaniach przyjętych i sprawdzonych w Mieście Stołecznym Warszawie. Model uwzględnia utworzenie Biura Bezpieczeństwa i Zarządzania Kryzysowego Aglomeracji (BBiZKA) podległego bezpośrednio prezydentowi miasta wojewódzkiego. Stałym elementem BBiZKA byłoby silne Centrum Zarządzania Kryzysowego Aglomeracji, a elementem opiniodawczo-doradczym prezydenta miasta byłby Zespół Zarządzania Kryzysowego Aglomeracji. Biuro Bezpieczeństwa i Zarządzania Kryzysowego Aglomeracji mogłoby powstać kosztem likwidacji rozproszonych centrów zarządzania kryzysowego w miastach i gminach tworzących tę aglomerację. W ogólnokrajowym systemie zarządzania kryzysowego, Centrum Zarządzania Kryzysowego Aglomeracji byłoby – podobnie, jak w Warszawie – podporządkowane Wojewódzkiemu Centrum Zarządzania Kryzysowego.
Źródło:
Bezpieczeństwo i Technika Pożarnicza; 2018, 49, 1; 102-110
1895-8443
Pojawia się w:
Bezpieczeństwo i Technika Pożarnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of application of mineral fertilizers containing biological additives on botanical composition, nitrogen status and yielding of grass-legume sward
Wpływ stosowania nawozów mineralnych zawierających dodatki biologiczne na skład botaniczny, odżywienie azotem i plonowanie runi trawiasto-bobowatej
Autorzy:
Zielewicz, W.
Goliński, P.
Wróbel, B.
Powiązania:
https://bibliotekanauki.pl/articles/334399.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
mineral fertilizers
biological additives
grass-legume mixture
sward yield
nawozy mineralne
dodatki biologiczne
mieszanka trawiasto-bobowata
plon runi
Opis:
The research was based in Experimental Station of the Department of Grassland and Natural Landscape Sciences at Poznań University of Life Sciences located in Brody Experimental Farm. Research on the influence of various doses of nitrogen fertilizer N-14, Physioactiv, Physiostart and PinKstart fertilizers applied in grass-legume mixture was conducted in the years 2016-2017. The following variants and doses of fertilizers were applied in the experiment: 1/ 300 kg·ha-1 N-14 under each regrowth (total of 900 kg·ha-1) + PK; 2/ 300 kg·ha-1 N-14 under the first regrowth and 180 kg·ha-1 of ammonium nitrate 34% N under the second and the third regrowth + PK; 3/ standard fertilization – 180 kg·ha-1 of ammonium nitrate 34% N under each regrowth + PK; 4/ Physioactiv fertilization in a dose of 300 kg·ha-1 before vegetation and 180 kg·ha-1 of ammonium nitrate 34% N under each regrowth + PK; 5/ Physiostart in a dose of 20 kg·ha-1 before vegetation and 180 kg·ha-1 of ammonium nitrate 34% N under each regrowth + PK; 6/ PinKstart in a dose of 20 kg·ha-1 before vegetation and 180 kg·ha-1 of ammonium nitrate 34% N under each regrowth + PK; 7/ absolute control – no fertilization. The highest yield of a dry matter of a grass-legume mixture in the two years of utilization was a result of an application of a nitrogen fertilizer N-14 which was applied under every regrowth and in a variant of application just under the first regrowth, together with a dose of phosphorus and potassium. A biological additive on the basis of sea algae (Pheoflore complex) in N-14 fertilizer resulted in higher yields of the sward, despite smaller dose of nitrogen when compared to variants fertilized with ammonium nitrate. An application of a calcium fertilizer Physioactiv with aminopurine resulted in an increase in a share of white clover in the sward and in a better nutrition of plants with nitrogen which was visible in the highest values of a leaf blades greenness index both in the case of white clover and perennial ryegrass. It may be presumed that the positive effects of the application of the analyzed fertilizers might originate from their formulation due to the joint of mineral components used in traditional fertilizers with biological additives which stimulate a root system, activate soil’s flora and therefore enhance the state of rhizosphere.
Badania przeprowadzono w Stacji Doświadczalnej Katedry Łąkarstwa i Krajobrazu Przyrodniczego zlokalizowanej w RGD Brody Uniwersytetu Przyrodniczego w Poznaniu. Prace badawcze nad wpływem stosowania zróżnicowanych dawek nawozów mineralnych N-14, Physioactiv, Physiostart i PinKstart w zasiewie mieszanki trawiasto-bobowatej prowadzono w latach 2016-2017. Zastosowano następujące warianty i dawki nawożenia: 1/ 300 kg·ha-1 N-14 pod każdy odrost (łącznie 900 kg·ha-1) + PK; 2/ 300 kg·ha-1 N-14 pod pierwszy odrost i 180 kg·ha-1 saletry amonowej 34% N pod drugi i trzeci odrost + PK; 3/ nawożenie standardowe NPK – 180 kg·ha-1 saletry amonowej 34% N pod każdy odrost + PK; 4/ nawożenie Physioactiv w dawce 300 kg·ha-1 przed ruszeniem wegetacji i 180 kg·ha-1 saletry amonowej 34% N pod każdy odrost + PK; 5/ Physiostart w dawce 20 kg·ha-1 przed ruszeniem wegetacji i 180 kg·ha-1 saletry amonowej 34% N pod każdy odrost + PK; 6/ PinKstart w dawce 20 kg·ha-1 przed ruszeniem wegetacji i 180 kg·ha-1 saletry amonowej 34% N pod każdy odrost + PK; 7/ kontrola absolutna – bez nawożenia. Przeprowadzone badania wykazały, że najwyższe plony suchej masy runi mieszanki trawiasto-bobowatej w ciągu dwóch lat użytkowania stwierdzono w następstwie stosowania nawozu azotowego N-14, który był podawany pod każdy odrost oraz w wariancie aplikacji tego nawozu tylko pod pierwszy odrost, wraz z dodatkową dawką fosforu i potasu. Dodatek biologiczny na bazie wyciągu z alg morskich (kompleks Pheoflore) w nawozie N-14, pomimo wprowadzania do gleby niższej dawki azotu, w porównaniu do wariantów nawożonych saletrą amonową, skutkował uzyskiwaniem wyższych plonów runi. Aplikacja nawozu wapniowego Physioactiv z dodatkiem aminopuryny wpłynęła na zwiększenie w runi udziału koniczyny białej oraz na lepsze odżywienie roślin azotem, co przejawiało się uzyskiwaniem najwyższych wartości indeksu zieloności liści, zarówno w przypadku koniczyny białej, jak również życicy trwałej. Istnieją uzasadnione przesłanki, że korzystne efekty stosowania badanych nawozów mogą być skutkiem ich formulacji ze względu na łączenie składników mineralnych wykorzystywanych w tradycyjnych nawozach wraz z dodatkami biologicznymi stymulującymi system korzeniowy roślin oraz aktywizujących florę glebową poprawiającą stan ryzosfery.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2018, 63, 3; 146-150
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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