Autor: L.U. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Carbon emission control measures
Autorzy:: Grema, L.U.
Abubakar, A.B.
Obiukwu, O.O.
Powiązania:: https://bibliotekanauki.pl/articles/11098.pdf
Data publikacji:: 2013
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: carbon
emission
control measurement
carbon dioxide
gas emission
steel industry
climate change
recovery
emission reduction
Opis:: This paper seeks to share the experience of the Ultra Low CO2 Steelmaking programme (ULCOS) established in 2002 by a number of EU members on how to cut down CO2 emission by at least 50 % of the present volume of emission. Global environmental challenge today is the issue of climate change resulting in devastating effects such as flooding in many countries of the world. One of the major causes is the CO2 emission from different industries including iron and steel industries. The total global CO2 emission was put at 29Gt in 2007 and projected to be 37Gt by the 2020. Out of this volume the steel industry accounts for 3-4 % and this call for concern from stakeholders to come up with measures to reduce or control the emission of the green house gas. These measures are necessary considering the growth of the iron and steel industry in the last 50 years. Important items considered include among others carbon emission and recovery, carbon capture and storage and new iron and steel making processes and their potential for CO2 reduction.
Źródło:: International Letters of Natural Sciences; 2013, 03
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Parks Transformation Based Formulation For Power Systems Transients Detection
Autorzy:: Ferraz, R. G.
Iurinic, L. U.
Filomena, A. D.
Bretas, A. S.
Powiązania:: https://bibliotekanauki.pl/articles/410529.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: Park's transformation
transient detection
power systems
Opis:: This paper presents proposed developments of a new formulation and a full algorithm for transient detection by applying Parks transformation. This approach consist in transforming three-phase voltage or current signals into Parks components known as direct, quadrature, and zero axes components. The input signals are local measurements of a power transmission or distribution system. Then, transients are superimposed in three-phase signals that can be detected in Parks components through the finite difference between samples. A full algorithm for the transient detection is presented and envisions the possibility of being applied in real time. In order to demonstrate the proposed algorithms performance, four case studies are considered: capacitor energizing, distribution transformer energizing, permanent resistive fault, and high impedance fault. These cases were simulated on a typical Brazilian sub-transmission line using Alternative Transient Program. As demonstrated by the case studies, the proposed formulation introduces further improvements for transient detection in power systems.
Źródło:: Present Problems of Power System Control; 2013, 4; 5-23
2084-2201
Pojawia się w:: Present Problems of Power System Control
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Diffraction of light by acoustic waves in liquids
Autorzy:: Wijewardena Gamalath, K. A. I. L.
Jayawardena, G. L. A. U.
Powiązania:: https://bibliotekanauki.pl/articles/411835.pdf
Data publikacji:: 2012
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: opóźnienie fazy
akustyczno-optyczne interakcje
parametr Kleina-Cooka
dyfrakcja Bragga
dyfrakcja Ramana-Natha
acusto-optic interactions
Raman-Nath and Bragg diffraction
Klein Cook parameter
phase delay
Opis:: For the acusto-optic interactions in liquids, an equation for the diffraction light intensity was obtained in terms of Klein Cook parameter Q. With optimized parameters for Q, incident light wave length of _=633 nm, sound wave length of _=0.1 mm, acusto-optic interaction length L=0.1 m, and refractive index of the liquid in the range of 1 to 2, the existence of ideal Raman-Nath and Bragg diffractions were investigated in terms of phase delay and incident angle. The ideal Raman-Nath diffraction slightly deviated when the Klein Cook parameter was increased from 0 to 1 for low chase delay values and for large phase delay, the characteristics of the Bessel function disappeared. Higher value of Klein Cook parameter gave Bragg diffraction and ideal Bragg diffraction was obtained for Q~100. A slight variation of the incident angle from Bragg angle had a considerable effect on Bragg diffraction pattern. Klein Cook parameter with the change of acoustic wave frequency was investigated for liquids with refractive index in the range1.3-1.7 and their diffraction patterns were compared with practically applicable acusto-optic crystals. For acusto-optic diffractions in liquids, sound velocity plays an important role in Bragg regime with Q increasing with increasing acoustic frequency. As acoustic wave frequency exceeded 10 MHz most of the liquids reached Bragg regime before these crystals.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2012, 4; 39-57
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Comparison of deep seepage estimations of a virtual with a real lysimeter by means of TDR-measurements
Autorzy:: Schindler, U.
Mueller, L.
Powiązania:: https://bibliotekanauki.pl/articles/24500.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: lysimeter
deep seepage
measurement
soil
unsaturated hydraulic conductivity
time domain reflectometry
Źródło:: International Agrophysics; 2005, 19, 1
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Nutrition quality in orphanages and state youth educational centres in Poland
Jakosc zywienia w domach dziecka i mlodziezowych osrodkach wychowawczych w Polsce
Autorzy:: Szponar, L.
Pelzner, U.
Powiązania:: https://bibliotekanauki.pl/articles/1371785.pdf
Data publikacji:: 1994
Wydawca:: Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:: domy dziecka
zywnosc
Polska
dzieci
jakosc
wartosc energetyczna
mlodziez
zywienie czlowieka
Opis:: In 1992 the quality of nutrition was assessed in 36 orphanages and 18 state youth educational centres. In relation to a similar study in 1983 an improvement was found in the consumption of animal protein and vitamin C. In lunch meals the content of energy, protein, fat and sodium chloride was determined. The energy value of lunch meals was too low and their salt content was too high. The amount of food left on plates was assessed in 15 children in each institution studied, and the obtained values were the lowest found in similar studies published so far. The qualitative assessment of the food given, demonstrated a too small number of daily meals, frequent lack of brunches and afternoon snacks, too low share of vegetables and fruit in all meals, too frequent main courses without meat given for lunch.
Źródło:: Polish Journal of Food and Nutrition Sciences; 1994, 03, 4; 125-134
1230-0322
2083-6007
Pojawia się w:: Polish Journal of Food and Nutrition Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Consumers’ acceptability of local rice brands in Nigeria. Which marketing functions really matter?
Autorzy:: Obih, U.
Baiyegunhi, L.
Powiązania:: https://bibliotekanauki.pl/articles/44132.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:: product
rice
brand
local brand
consumer
acceptability
Nigeria
marketing function
Źródło:: Journal of Agribusiness and Rural Development; 2018, 48, 2
1899-5241
Pojawia się w:: Journal of Agribusiness and Rural Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A Model Proposal for Wall Material Selection Decisions by Using Analytic Hierarchy Process (AHP)
Autorzy:: Uğur, L.
Baykan, U.
Powiązania:: https://bibliotekanauki.pl/articles/1031409.pdf
Data publikacji:: 2017-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: multi-criteria decision making
analytical hierarchy process
expert choice
building material selection
Opis:: Analytical hierarchy process, developed by Saaty, is a multi-criteria decision making method. It creates a hierarchy using the goal, decision criteria and decision alternatives, and sorts the various alternatives according to their relative importance. The aim in AHP is to choose the most suitable and important alternative, by making an arrangement from the most important to the least. In this study, a real life material selection application in a hotel building is described by using AHP method. Wall materials such as brick blocks, pumice concrete block, sand autoclaved aerated concrete blocks are decision alternatives and mechanical properties, physical properties, ease of application and costs of these materials are the decision factors. The analysis was performed based on the opinion of an expert and the most suitable alternative is selected. Also, it is concluded that the order related to the alternatives is reliable for the decision markers. Thus, a decision supporting method for a construction company using AHP applications is developed.
Źródło:: Acta Physica Polonica A; 2017, 132, 3; 577-579
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Comparison of keypoint detection methods for indoor and outdoor scene recognition
Autorzy:: Libal, U.
Łoziuk, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/384590.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: machine vision
keypoint
UAVs
scene recognition
Opis:: We describe an experimental study, based on several million video scenes, of seven keypoint detection algorithms: BRISK, FAST, GFTT, HARRIS, MSER, ORB and STAR. It was observed that the probability distributions of selected keypoints are drastically different between indoor and outdoor environments for all algorithms analyzed. This paper presents a simple method for distinguishing between indoor and outdoor environments in a video sequence. The proposed method is based on the central location of keypoints in video frames. This has lead to a universally effective indoor/outdoor environment recognition method, and may prove to be a crucial step in the design of robotic control algorithms based on computer vision, especially for autonomous mobile robots.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 4; 7-14
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Detection of windows in building textures from airborne and terrestrial infrared image sequences
Autorzy:: Iwaszczuk, D.
Hoegner, L.
Stilla, U.
Powiązania:: https://bibliotekanauki.pl/articles/130294.pdf
Data publikacji:: 2011
Wydawca:: Stowarzyszenie Geodetów Polskich
Tematy:: infrared
image sequences
texture mapping
structure detection
sekwencje obrazów
podczerwień
mapowanie tekstur
Opis:: Infrared (IR) images depict thermal radiation of physical objects. Imaging the building façades and the roofs with an IR camera, thermal inspections of the buildings can be carried out. In such inspections a spatial correspondence between IR-images and the existing 3D building models can be helpful. Texturing 3D building models with IR images this spatial correspondence can be created. Furthermore in textures heat leakages can be detected and the heat bridges can be stored together with 3D building data. However, before extracting leakages, the windows should be located. In IR images glass reflects the surrounding and shows false results for the temperature measurements. Consequently, the windows should be detected in IR images and excluded for the inspection. The most common algorithms for window detection were developed for the images in the visual band. In this paper, an algorithm for window detection in textures extracted from terrestrial IR images is proposed. In the first step, small objects have to be removed by scaling down the image (texture). Then in the scaled image, regions are detected using a local dynamic threshold. Morphological operations are used to remove false detections and unify substructures of the windows. For every extracted region, which is a candidate for a window, the center of gravity is calculated. It is assumed that windows on façades are ordered in regular rows and columns. First the points are grouped into rows using histogram of height created from extracted gravity centers. Then masked correlation is used to detect the position and size of the windows. Finally, the gaps in the grid of windows are completed. For the first experiments we use a dataset from densely build urban area captured in Munich, Germany. The IR image sequences were taken from a vehicle driving on the street around the test area. Camera was directed to the building in oblique view. According to the acquisition geometry, no façade could be completely seen in one frame. Therefore, we combine the textures from many frames. To these textures we applied our algorithm for window detection. First results are promising. Applying the method for our test dataset, 79% completeness and 80% correctness could be achieved.
Źródło:: Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 215-225
2083-2214
2391-9477
Pojawia się w:: Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Convenient synthesis of the 2,5-di-substituted 1,3,4-oxadiazole derivatives under microwave
Autorzy:: Namera, D. L.
Bhoya, U. C.
Powiązania:: https://bibliotekanauki.pl/articles/412441.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: substituted cinnamic acid
substituted 1,3,4-oxadiazoles
phosphoric anhydride
Opis:: We have reported some novel 1,3,4-oxadiazole synthesized by conventional method as well as microwave assisted method. The reaction of different substituted cinnamic acid 2a-o with 2-(4-chlorophenyl) acetohydrazide by using phosphoric anhydride as catalyst, yielded a series of 2,5-di-substituted 1,3,4-oxadiazole 6a-o. The structures of all synthesized compounds are well characterized by Mass, FT-IR, 1H NMR, 13C NMR and elemental analysis. After obtaining experimental data regarding the yield and the time taken for the synthesis by both the methods, conventional and microwave assisted method, it was proved that the microwave assisted method is convenient for synthesis of this type of 2,5-di-substituted 1,3,4-oxadiazole 6a-o.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 159-166
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Optimality and stability result for bang-bang optimal controls with simple and double switch behaviour
Autorzy:: Felgenhauer, U.
Poggiolini, L.
Stefani, G.
Powiązania:: https://bibliotekanauki.pl/articles/970776.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: bang-bang control
parametric control problems
Hamiltonian flows
Opis:: The paper considers parametric optimal control problems with bang-bang control vector function. For this problem we give regularity and second-order optimality conditions at the nominal solution which are sufficient to: (i) existence and local uniqueness of extremals, (ii) local structure stability, (iii) strong local optimality, under parameter perturbations. Here "local" means in a L∞ neighbourhood of the nominal trajectory, regardless of the control values. Stability results were obtained by the first author using the shooting approach, while optimality results were obtained by the other authors, using the Hamiltonian approach. The paper, combining both approaches, allows to unify the assumptions and to close some gaps between optimality and stability results.
Źródło:: Control and Cybernetics; 2009, 38, 4B; 1305-1325
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Harmonisation of water management and agricultural policies in Slovenia
Harmonizowanie gospodarki wodnej i polityki rolnej w Słowenii
Autorzy:: Pintar, M.
Globevnik, L.
Bremec, U.
Powiązania:: https://bibliotekanauki.pl/articles/293250.pdf
Data publikacji:: 2007
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: części wód
dyrektywa azotanowa
gospodarka wodna
polityka rolna
ramowa dyrektywa wodna
agricultural policies
nitrate directive
water bodies
Water Framework Directive UE
water management
Opis:: In order to maintain and improve water quality, man has an increasing need to understand the relations among basin land use and in stream water quality. Being concerned about quality and quantity status of European waters European Union has adopted Water Framework Directive (2000/60/EU). The process of pressure and impact analyses and water status assessment is termed, in short, as "first characterisation" of water bodies. In accordance to WFD programmes of measures have to be developed by 2009. In WFD programmes existing measures for water protection directed by other EU directives such are Nitrate, Urban Waste Water, Dangerous Substances and IPPC will be further developed and new added. In the paper, we describe the first characterisation of the Slovene waters and show cross compliance of the Nitrate and Water Framework Directives in Slovenia.
Człowiek odczuwa rosnącą potrzebę zrozumienia związków między użytkowaniem zlewni i jakością wód rzecznych, aby zachować lub poprawić tę jakość. W trosce o ilościowy i jakościowy status wód Unia Europejska przyjęła Ramową Dyrektywę Wodną (2000/60/EU). Proces analizy oddziaływania gospodarki, w tym rolnictwa, na stan jakościowy wód nazwano w skrócie "pierwszą charakterystyką" scalonych części wód. Zgodnie z RDW, programy służących temu narzędzi mają powstać do roku 2009. W programach RDW stworzone zostaną nowe środki ochrony wód, a istniejące, takie jak europejska Dyrektywa Azotanowa, Dyrektywa o gospodarce odpadami i substancjami niebezpiecznymi oraz IPPC, będą rozwijane. W artykule przedstawiono wstępną charakterystykę słoweńskich wód i wzajemną zgodność Dyrektywy Azotanowej i Ramowej Dyrektywy Wodnej w Słowenii.
Źródło:: Journal of Water and Land Development; 2007, 11; 31-44
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Spatio-temporal pattern of phytoplankton and pigment composition in surface waters of sSsouth-Eastern Black Sea
Autorzy:: Agirbas, E.
Koca, L.
Aytan, U.
Powiązania:: https://bibliotekanauki.pl/articles/48419.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: phytoplankton
pigment composition
environment parameter
surface water
nutrient
Baltic Sea
high performance liquid chromatography
microscopic analysis
Opis:: Phytoplankton community, diatom to dinoflagellate ratio and pigment composition in surface waters with nutrient data from April 2013 to March 2014 were monitored in the south-eastern (SE) Black Sea using high performance liquid chromatography (HPLC) and microscopic analyses. Microscopic examination revealed a total of 71 species that consist of dinoflagellate (58%), diatoms (25%) and other groups (17%). Microscopy and HPLC-based pigment analyses revealed almost similar results which suggest that the phytoplankton community is mainly composed of diatoms, dinoflagellates and coccolithophores. Fucoxanthin (mean 0.35 ± 019 μg L−1), peridinin (mean 0.18 ± 0.14 μg L−1) and 19-hexanoyloxyfucoxanthin (mean 0.24 ± 0.15 μg L−1) are prominent pigments which showed significant correlation with Diatom-C (r2 = 0.63–0.71, p < 0.05), Dinoflagellate-C (r2 = 0.49–0.80, p < 0.05) and Coccolithophore-C (r2 = 0.72–0.82, p < 0.05), respectively. Mean carbon biomass of diatoms (36.50 ± 9.72 μg L−1) was higher than that of dinoflagellates (33.32 ± 9.05 μg L−1). Significant differences were also observed in nutrient ratio (N:P and Si:N) (One-way ANOVA, p < 0.05). Results illustrate that HPLC-based pigment approach can be used for taxonomic characterisation of phytoplankton groups in the SE Black Sea. Moreover, relatively high dinoflagellate species dominancy and significant correlations between Phyto-C and marker pigments indicate that phytoplankton community composition is shifting towards much smaller groups in SE coasts of the Black Sea.
Źródło:: Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki