Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Sultan, -" wg kryterium: Autor

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 34
Tytuł:
A trial of doramectin injection and ivermectin spot-on for treatment of rabbits artificially infested with the ear mite “Psoroptes cuniculi”
Autorzy:
Elhawary, N.M.
Sorour, Sh. S.G.H.
El-Abasy, M.A.
Bazh, E.K.
Sultan, K.
Powiązania:
https://bibliotekanauki.pl/articles/2087886.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Polish Journal of Veterinary Sciences; 2017, 3; 521-525
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anxiety states and knowledge of COVID-19 among pregnant women during the pandemic in Turkey – a cross-sectional study
Autorzy:
Hoşoğlu, Esra
Şahin, Berkan
Sultan Önal, Bedia
Baki Yıldırım, Sema
Powiązania:
https://bibliotekanauki.pl/articles/2040151.pdf
Data publikacji:
2021-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
anxiety
knowledge
pandemic
pregnancy
Opis:
Introduction. Infectious outbreaks have negative effects not only on the physical health of the society but also on the mental health. Aim. To evaluate the anxiety states and knowledge of COVID-19 during the pandemic in pregnant women. Material and methods. Cross-sectional study conducted in a university hospital in Turkey. A total of 199 pregnant women were included in the study. The State-Trait Anxiety Inventory (STAI), two questionnaires to evaluate the knowledge about COVID-19, and COVID-19-related anxiety were applied to all the women. Results. The highest level of COVID-19-related anxieties were about their spouses or newborns contracting COVID-19, effects of drugs on fetus and contracting COVID-19 during delivery. There was a negative correlation between gestational week and the questionnaire of COVID-19-related anxieties (r=-0.152, p=0.037). STAI total score was 76.48±14.11, and STAI-T scores (42.39±7.66) were higher than STAI-S scores (34.09±8.77). Although their general knowledge about the disease was relatively good, their level of knowledge on issues that pertained specifically to pregnancy was low. Conclusion. These findings indicated more than four months had passed since the pandemic came to the country but, pregnant women were very worried and did not have enough information about the disease
Źródło:
European Journal of Clinical and Experimental Medicine; 2021, 1; 10-17
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ATTITUDES OF STUDENTS AT SAUDI ARABIA’S INDUSTRIAL COLLEGES TOWARD COMPUTER-ASSISTED LANGUAGE LEARNING (CALL)
Autorzy:
Arishi, Sultan A. M.
Powiązania:
https://bibliotekanauki.pl/articles/941297.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Tematy:
CALL
student attitudes
Saudi Arabia
Opis:
This paper identified attitudes toward CALL of students studying English as a foreign language (EFL) at industrial colleges in Saudi Arabia. Seventy students who were enrolled in the orientation year of an English program were chosen to participate in this study by expressing their attitudes toward CALL. Standardized and local instruments were used along with interviews and observation techniques to collect data. The results of the study revealed that students had positive attitudes toward CALL. Looking at the daily hours students spend using a computer, a slight correlation was found between this variable and the students’ attitudes toward CALL. Other variables, such as students’ background knowledge of English, ownership of a computer, and their computer knowledge, were found to be irrelevant to their attitudes toward CALL. These results were in line with previous research conducted by Al-Shammari (2007), Alrumaih (2004), and Almekhlafi (2006). The results reinforced conclusions about CALL revealed by researchers, such as Chen (2003), Chikamatsu (2003), Egbert (2005) and Levy (2005), who found that it helps students learn better and more independently, and gives them the ability to have more control of their learning and to have more opportunities to practice English.
Źródło:
Teaching English with Technology; 2012, 12, 1; 38-52
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cassiterite recovery from a sulfide ore flotation tailing by combined gravity and flotation separations
Autorzy:
Zhang, Limin
Khoso, Sultan Ahmed
Tian, Mengjie
Sun, Wei
Powiązania:
https://bibliotekanauki.pl/articles/1448947.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Cassiterite
Falcon concentrator
shaking table
flotation
gravity separation
Opis:
Cassiterite (SnO2) which is the most important Sn-containing mineral, is extensively found in large quantities in discarded tailings. The recovery of cassiterite from discarded sulfide ore flotation tailings can reduce resource wastage and environmental pollution. The gravity separation technique can recover multiple valuable minerals, such as cassiterite, whose densities considerably differ from those of their associated gangue minerals. However, its recovery efficiency rapidly decreases as the mineral particle grain size decreases. To recover the finer valuable mineral particles from gravity separation tailings, flotation separation can be used as a supplementary method. In this study, the gravity and flotation separation techniques are combined to recover cassiterite from a sulfide ore tailing. The Sn grade and recovery of the final concentrate is 31.40% and 88.05%, respectively, thus indicating a highly efficient recovery of cassiterite by using the combined gravity and flotation separation technique. This study can be an important reference for recovering cassiterite from low-Sn-grade tailings.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 1; 206-215
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clay/nanocomposite hydrogels : In review
Autorzy:
Kurama, Haldun
Şengel, Sultan Bütün
Powiązania:
https://bibliotekanauki.pl/articles/24085586.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hydrogel
clay
composite hydrogel
exfoliation
high energy ball mills
Opis:
The development of advanced materials those are stronger, more rigid, lighter, hotter and self-renewable than existing materials has been the rising point of many research studies conducted in recent years. Within this scope, the interest to production of nanostructured materials is received considerable attention worldwide due to their potential positive contribution to wide variety of technological areas such as electronics, catalysis, adsorbents, ceramics, magnetic data storage, structural components etc. In these efforts polymer nanocomposites as the form of hydrogels, reinforced with well-dispersed layered silicate, typically montmorillonite can be given as a one of the promising composite material. However, long-standing problems for polymer-clay nanocomposites include actual exfoliation of clay particles in discrete layers, uniform distribution of clay layers throughout the polymer, and randomness of clay sequences. For the exfoliation of clay particles, although the chemical modification of clay minerals in aqueous media is the well-known and more general way applied by researchers, the physical pathway method performed by high-energy ball mills is also gaining increasing attention as an alternative pretreatment way. Grinding of crushed materials is one of the key processes in the mineral and cement industry, but the increased concern on the preparation of fine-grained powders (nano powders) or the manufacture of composites with desirable properties, especially performed with use of high-energy ball mills, has led to significantly widen the usage field of grinding. Undoubtedly, the main reason for these efforts is to improve the performance of existing materials. In this paper the fundamental concepts, classification, physical and chemical characteristics and the production methods of clay/polymer nanocomposites was briefly reviewed base on the composite hydrogel. Particular attention was paid to the pre-treatment (exfoliation) of clays with high-energy ball mills, which is increasingly being accepted as an alternative method to eliminate the negative effects of chemical treatment in some composite forms.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 165991
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Competitive advantages through IT-enabled supply chain management (SCM) context
Przewaga konkurencyjna dzięki zarządzaniu łańcuchem dostaw (SCM) w kontekście IT
Autorzy:
Tarofder, Arun Kumar
Jawabri, Adnan
Haque, Ahasanul
Azam, S. M. Ferdous
Sherief, Sultan Rehman
Powiązania:
https://bibliotekanauki.pl/articles/404799.pdf
Data publikacji:
2019
Wydawca:
Politechnika Częstochowska
Tematy:
IT
supply chain
competitive advantages
strategic
operational
łańcuch dostaw
przewaga konkurencyjna
strategiczne
operacyjne
Opis:
The primary aim of this study is to investigate the effect of IT-enabled supply chain on the operational and strategic benefits, which eventually ensures firms competitive advantages. A conceptual model was developed based onthe theory of competitive advantage suggested by Porters and also extensive empirical study. The questionnaire was developed based on several steps and items were adopted from several prior studies. Stratified random sampling was employed to collect data from 203 respondents. Based on structural equation modelling, IT-enabled SCM is able to offer a wide range of operational benefits, instead of strategic. Results were antagonized several prior studies and confirmed that competitive advantages greatly depend on operational benefits rather than strategic. This is study is one of the very few empirical investigations that investigate the benefits of IT from two different perspectives and their effects of competitive advantages. Findings of this study will help managers to understand the importance of IT-enabled SCM in their organizations.
Głównym celem przeprowadzonego badania jest zbadanie wpływu IT w łańcuchu dostaw na korzyści operacyjne i strategiczne, które ostatecznie zapewniają firmom przewagę konkurencyjną. Opracowano model koncepcyjny oparto na teorii przewagi konkurencyjnej sugerowanej przez Portera, a także przeprowadzonych obszernych badaniach empirycznych. Kwestionariusz został opracowany na bazie kilku etapów, a jego elementy zostały przyjęte z wcześniejszych badań. Do zbierania danych od 203 respondentów wykorzystano losowy dobór próby badawczej. W oparciu o modelowanie równań strukturalnych, należy stwierdzić że SCM ze wsparciem IT może zaoferować szeroki zakres korzyści operacyjnych, zamiast strategicznych. Wyniki były sprzeczne z kilkoma wcześniejszymi badaniami i potwierdziły, że przewaga konkurencyjna w dużym stopniu zależy od korzyści operacyjnych, a nie strategicznych. Niniejsze badanie jest jednym z niewielu badań empirycznych, które badają korzyści z IT z dwóch różnych perspektyw i ich skutków w postaci przewagi konkurencyjnej. Wyniki tego badania pomogą menedżerom zrozumieć znaczenie SCM ze wsparciem IT w ich organizacjach.
Źródło:
Polish Journal of Management Studies; 2019, 19, 1; 464-474
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of residual stress distribution in high strength aluminum alloy after EDM
Autorzy:
Mehmood, S.
Sultan, A.
Anjum, N. A.
Anwar, W.
Butt, Z.
Powiązania:
https://bibliotekanauki.pl/articles/103214.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
electric discharge machining
residual stresses
discharge current
aluminum alloy
Opis:
Thermal energy produced by discrete and random electric sparks in electric discharge machining (EDM) melts surface material. A portion of this molten material is removed and the remaining material resolidified by rapid cooling in a hydrocarbon oil. The effect of repeated heating and cooling of the surface and sub surface material with complex temperature gradients results in residual stresses in machined parts. The aim of this investigation is to determine the distribution of residual stresses in the depth of machined material with respect to discharge current, most important electric parameter during EDM. It is well known that surface finish is dependent on discharge current. Therefore, investigations were carried out for smaller discharge current levels i.e. 3, 6, 9, 12 ampere. Hole-drill strain gauge method is used for the determination of residual stresses in the depth of material. For comparison purposes, residual stresses are also determined for conventionally turned specimens. This study provided quantitative analysis of the residual stresses for various discharge current in EDM which is a key parameter in deciding the service life of material.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 29-35
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of hydrogen-enriched water gas production technology by processing Ekibastuz coal with technogenic waste
Autorzy:
Dikhanbaev, B.
Dikhanbaev, A. B.
Sultan, I.
Rusowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/140012.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrogen-enriched water gas
reactor of inversion phase–rotary kiln–gas generator
cupreous cast iron
zinc-germanium containing sublimates
gaz wodny wzbogacony wodorem
reaktor fazy inwersyjnej-pieca obrotowego-generatora gazu
żeliwo miedziowe
sublimaty zawierające cynk-german
Opis:
In the dumps of metallurgical enterprises of Kazakhstan about 700 million tons of waste products are generated annually, and are polluting the atmosphere and the soil. The concentration of valuable components in waste products are no lower than in natural resources. The reserves of coal in the Ekibastuz basin are estimated to be more than a billion tons, and almost half of this is made up of ash. Every year, up to 30 million tons of ash-cinder waste is generated, which presents a serious threat to nature. Gallium and germanium concentrations in dumps are approximately 200 grams per ton, which is comparable to the content in coal before processing. The current research aims at creating a unit to obtain hydrogen-enriched water gas from Ekibastuz coal, with the production of zinc, gallium and germanium sublimates, copper-containing cast iron, slag wool and cast stone, through the joint processing of zinc-rich slag and ash-cinder wastes from thermal power plants. To achieve this, we used previous methods of extreme energy saving and a new method, the smelt layer with inversion phase. Experimental results from the “reactor inversion phase – rotary kiln” (RIPh) unit, which processed zinc-germanium contained slag, showed the potential to extract germanium from zinc sublimates, to reduce iron to the form of cupreous cast iron, and to obtain combustible gases and smelt suitable for slag-wool production. Calculations performed on the joint processing of Ekibastuz coal and zinc-rich slag using the proposed unit“ reactor of inversion phase–rotary kiln–gas generator” showed it can obtain hydrogen-enriched watergas, along with the extraction of valuable components of primary raw material.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 2; 221-231
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of exposure to electromagnetic field radiation (EMFR) generated by activated mobile phones on fasting blood glucose
Autorzy:
Meo, Sultan A.
Al Rubeaan, Khalid
Powiązania:
https://bibliotekanauki.pl/articles/2179776.pdf
Data publikacji:
2013-04-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
mobile phone radiation
hyperglycemia
insulin resistance
β-cell function
Opis:
Objective: Extensive use of mobile phones has been accompanied by a common public debate about possible adverse effects on human health. No study has been published so far to establish any association between the fastest growing innovation of mobile phone and fasting blood glucose. The aim was to determine the effects of exposure to electromagnetic field radiation generated by mobile phones on fasting blood glucose in Wistar Albino rats. Materials and Methods: 40 Male Albino rats (Wistar Strain) were divided into 5 equally numerous groups. Group A served as the control one, group B received mobile phone radiation for less than 15 min/day, group C: 15-30 min/day, group D: 31-45 min/day, and group E: 46-60 min/day for a total period of 3 months. Fasting blood glucose was determined by using Spectrophotometer and serum insulin by Enzyme-linked Immunosorbent Assay (ELISA). The Homeostatic Model (HOMA-B) was applied for the assessment of β-cell function and (HOMA-IR) for resistance to insulin. Results: Wister Albino rats exposed to mobile phone radiation for longer than 15 min a day for a total period of 3 months had significantly higher fasting blood glucose (p < 0.015) and serum insulin (p < 0.01) compared to the control group. HOMA-IR for insulin resistance was significantly increased (p < 0.003) in the groups that were exposed for 15-30 and 46-60 min/day compared to the control rats. Conclusion: The results of the present study show an association between long-term exposure to activated mobile phones and increase in fasting blood glucose and serum insulin in Albino rats.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2013, 26, 2; 235-241
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of single and mixed reagent systems on improved diaspore recovery
Autorzy:
Jiang, Hao
Xiang, Guoyuan
Gao, Ya
Khoso, Sultan Ahmed
Peng, Weiwen
Powiązania:
https://bibliotekanauki.pl/articles/110867.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
diaspore
flotation
mixed collector
froth stability
adsorption
Opis:
Frothing performance and stability of sodium oleate (NaOL) alone and in presence of methyl isobutyl methanol (MIBC), octanol (OCT) and polyethylene glycol (PEG) systems were studied and compared in order to enhance flotation separation of diasporic bauxite ore. Performance of a single (NaOL) and mixed systems (NaOL-MIBC, NaOL-OCT, NaOL-PEG) was evaluated through flotation tests, three-phase dynamic froth stability tests, zeta potential measurements and adsorption analysis. The mixed systems showed a stable froth and an improved recovery with their descending order NaOLPEG˃NaOL-OCT ˃ NaOL-MIBC. Adsorption analysis and zeta potential measurements suggested that, except NaOL adsorption, there was no significant co-adsorption of alcohols on the diaspore surface. However, adsorbed amount of NaOL on the diaspore surface was extremely high; accounts for more than 90% of the total substance used in the pulp.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1179-1191
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Dispersion of Nitrogen Dioxide and Carbon Monoxide in the Indoor Café – Case Study
Autorzy:
Al-Sultan, Ammar A.
Jumaah, Ghufran F.
Al-Ani, Faris H.
Powiązania:
https://bibliotekanauki.pl/articles/124047.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
indoor air pollutants
nitrogen dioxide
carbon monoxide
global standard
smoker
Opis:
A popularity café in Baghdad city was chosen to measure the dispersion of nitrogen dioxide (NO2) and carbon monoxide (CO) as examples of the Indoor Air Pollutants (IAPs) which are considered a significant environmental problem. The aims of this research were, firstly, to measure the variation of NO2 and CO concentrations; secondly, to examine the effect of the seasonal variation of indoor temperature (°C) and relative humidity (%) on the dispersion of both NO2 and CO and finally to compare the results with those of the global standards. The volume of café was about 360 m3 and the number of smokers was about 25-35 smoker/day. This work was divided into two parts where the first part includes the experimental work which comprised the measurement of NO2 and CO by GIGs devices. It was lasted about five months commencing from November 2017 to March 2018 and the readings were taken during two intervals at partial time and during peak time. The second part includes the analysis of obtained results and compared the results of those of the global standards for the Indoor Air Quality suggested by WHO, EPA, and European criteria in order to achieve the goals of this work. The results from this research have highlighted a clear increase in the concentrations of NO2 and CO along with the growing numbers of smokers. Furthermore, the concentrations of NO2 and CO were close to some global standard values of short-term exposure at peak time.
Źródło:
Journal of Ecological Engineering; 2019, 20, 4; 256-261
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GPON, the Ultimate Pertinent of Next Generation Triple-play Bandwidth Resolution
Autorzy:
Sultan, D. M. S.
Arefin, Md. T.
Powiązania:
https://bibliotekanauki.pl/articles/309086.pdf
Data publikacji:
2011
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
FTTH
Gigabit PON (GPON)
IPTV
OLT
ONU
PON
VoIP
Opis:
Optical transmission is getting more popular in the access network due to the increasing demand for bandwidth. New services like IP television (IPTV) transmission, video on demand (VoD) etc. over Internet together along high speed Internet access are confronting the demand of higher bandwidth at the customer end in today's Ethernet network backbone. Even though today's well deployed XDSL (i.e., VDSL/VDSL2+, SHDSL) solutions can satisfy bandwidth demand but are limited to the restriction regarding distance. Hereby, the suitable solution for high bandwidth demand with a long reach can be met by reaching optical cable to cus- tomer end directly. One of the possible ways would be to install passive optical network (PON). Gigabit PON (GPON) is the far-most advanced PON solution used by European and US providers while providers in Asia predominantly use EPON/GePON. This GPON is the basic technology to support the structure of the next-generation fiber to the home (FTTH) system. This paper provides an overview of such GPON solution associating its network architecture, transmission mechanisms and some key services.
Źródło:
Journal of Telecommunications and Information Technology; 2011, 2; 53-60
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of GDP, spending on R&D, the number of universities and scientific journals on research publications in environmental sciences in the Middle East
Autorzy:
Meo, Sultan A.
Al Masri, Abeer A.
Usmani, Adnan M.
Halepoto, Dost M.
Powiązania:
https://bibliotekanauki.pl/articles/2179074.pdf
Data publikacji:
2013-10-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
bibliometric indicators
financing science
expenditures on science
research publications
Middle East
Opis:
Objectives: This study aimed to assess the impact of the Gross Domestic Product (GDP), spending on Research and Development (R&D), the number of universities and scientific journals on the published research documents, citable documents, citations per document and H-index in environmental sciences in the Middle East countries. Materials and Methods: All the 16 Middle East countries were included in the study. Information regarding the GDP, spending on R&D, the total number of universities and indexed journals was collected. Total number of research documents (papers), citable documents, citations per document and H-index in environmental sciences during the period 1996-2011 was recorded. The study used the World Bank, SCI-mago/Scopus, Web of Science, Journal Citation Reports (Thomson Reuters) as the main sources of information. Results: The mean GDP per capita of all the Middle East countries amounted to 18 125.49±5386.28 US$, spending on R&D was 0.63±0.28 US$, the number of universities equaled 36.56±11.33 and mean ISI indexed journals amounted to 8.25±3.93. The mean number of research documents published in environmental sciences in the Middle East countries during the period 1996-2011 was 2202.12±883.98; citable documents: 2156.87±865.09; citations per document: 8.74±0.73; and the H-index: 35.37±6.17. There was a positive correlation between the money spent on R&D and citations per documents (r = 0.6, p = 0.01), H-Index (r = 0.6, p = 0.01); the number of universities and a total of research documents (r = 0.65, p = 0.006), citable documents (r = 0.65, p = 0.006), H-Index (r = 0.50, p = 0.04), as well as ISI indexed journals and total research documents (r = 0.94, p = 0.0001), citable documents (r = 0.94, p = 0.0001), H-Index (r = 0.73, p = 0.001). Conclusions: The Middle East countries which spend more on R&D and which have a large number of universities and ISI indexed journals are likely to produce more significant volume of research papers in the field of environmental science.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2013, 26, 5; 702-709
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Government Spending and Corruption on Foreign Direct Investment in Indonesia
Autorzy:
Syukri, Adya Utami
Hasanuddin, Basri
Paddu, Abdul Hamid
Suhab, Sultan
Powiązania:
https://bibliotekanauki.pl/articles/2207156.pdf
Data publikacji:
2022-06-24
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
Foreign Direct Investment
Government Expenditure
Corruption
Opis:
Investment is a critical macroeconomic variable for economic growth and development in any country. As a developing country with the fourth largest population in the world, Indonesia is also dependent on investment coming in from both home and abroad. A good investment climate is one of the solutions in overcoming economic problems so that foreign investors can invest in Indonesia. Obviously, various factors influence investors' willingness to invest in Indonesia. The purpose of this study is to examine the impact of government spending, corruption, economic growth and wages on foreign direct investment in Indonesia. The study uses Ordinary Least Square (OLS) multiple linear regression analysis for the research period 2000-2020. The results show that the variables of government spending, corruption and economic growth have positive and significant impact on foreign direct investment, while the variable of salary has negative and significant impact on foreign direct investment. The Indonesian government needs to reduce the level of corruption and wage level to attract investors.
Źródło:
Research Papers in Economics and Finance; 2022, 6, 1; 34-45
2543-6430
Pojawia się w:
Research Papers in Economics and Finance
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of kenaf fiber thermoplastic polyurethane-natural rubber composites
Właściwości mechaniczne kompozytów na osnowie termoplastycznego poliuretanu i naturalnego kauczuku z włókna mikenafu
Autorzy:
Noor Azammi, A. M.
Sapuan, S. M.
Ishak, M. R.
Sultan, M. T. H.
Powiązania:
https://bibliotekanauki.pl/articles/947095.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
kenaf fiber treatment
NaOH
tensile
flexural
impact
morphology
fiber surface
matrices surface
kompozyty stomatologiczne
poliedryczne oligomeryczne silseskwioksany
modyfikacja
Opis:
Thermoplastic polyurethane-natural rubber TPUR-NR composites filled with treated and untreated kenaf fiber as filler were prepared at different TPUR and NR contents. The content of kenaf fiber was maintained at 12.5 wt % and the fiber was treated with 6 % solution of sodium hydroxide (NaOH), then dried for 24 hours in 100 °C, hot blended with polymer components, pulverized and pressed. The mechanical properties of the composites such as tensile, flexural and impact strength were determined, and their dependence on NaOH treatment of kenaf fibers was investigated. The analysis using scanning electron microscope (SEM) was implemented to identify the effect of alkali treatment on the microstructure of kenaf fiber and TPUR-NR composites. An improvement of fiber surface roughness and bonding between the fiber and polymer as well as an increase in impact energy and elongation at break of the composites was observed.
Otrzymano kompozyty na osnowie termoplastycznego poliuretanu (TPUR) i naturalnego kauczuku (NR) (o różnej zawartości TPUR i NR), napełnionej włóknami kenafu KF (12,5% mas.). Włókna poddawano wstępnej obróbce przy użyciu 6% roztworu wodorotlenku sodu, suszono w temp. 100 °C przez 24 h, mieszano na gorąco z komponentami polimerowymi, pulweryzowano i prasowano. Zbadano właściwości mechaniczne przy ściskaniu i rozciąganiu oraz odporność na uderzenie kompozytów zawierających modyfikowane lub niemodyfikowane włókna kenafu, a także wpływ alkalicznej obróbki włókien na właściwości kompozytu. Obserwacje mikrostruktury kompozytów prowadzono metodą skaningowej mikroskopii elektronowej. Stwierdzono, że obróbka włókien KF roztworem NaOH wpłynęła na zwiększenie chropowatości ich powierzchni i zdolności wiązania z osnową polimerową, a także na poprawę odporności na uderzenie i zwiększenie wydłużenia przy zerwaniu kompozytów zawierających modyfikowane włókna.
Źródło:
Polimery; 2018, 63, 7-8; 524-530
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies