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    Wyświetlanie 1-9 z 9
    Tytuł:
    Investigation of Marine Pollution Caused by Ship Operations with DEMATEL Method
    Autorzy:
    Özdemir, Ü
    Yılmaz, H.
    Başar, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/117112.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    marine pollution
    decision-making trial and evaluation laboratory (DEMATEL)
    DEMATEL method
    ship operation
    environment protection
    environmental science
    multiple criteria decision-making (MCDM)
    ecology
    Opis:
    Ships have an important role in among the factors causing marine pollution. Marine pollution by ships damages sea life, which effects human health indirectly, in addition it restricts usage of sea for different purposes. Increasing comprehensive and compelling liabilities related with environmental components and subjects day by day are expected results for environmental science and engineering applications according to 60% of our responsibilities of European Union Integration development. In today’s’ world, where global warming is an issue of high priority and makes us feel its impacts in our lives, leaving a livable world to the next generations is now a primary goal for all. Determination of marine pollution caused by ship operations issue is a multiple criteria decision-making (MCDM) problem, and requires MCDM methods to solve it. Therefore, the role of ship factor in maritime pollution and the possible reasons of this argument can be quantitatively evaluated based on expert knowledge and MCDM methodology. To investigate what makes to reduce the first “caused by ship operations " in marine pollution, the decision-making trial and evaluation laboratory (DEMATEL) method approach was applied in this study.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 315-320
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Turkish Women Seafarers and A Quastionnaire Study on Employment Situation
    Autorzy:
    Yilmaz, H.
    Basar, E.
    Ozdemir, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/117539.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Turkish Women Seafarers
    employment situation
    crew resource management
    seafarers
    Turkish
    maritime profession
    women seafarers
    female seafarers
    gender
    Turkish shipping companies
    ships crew
    Opis:
    Throughout history, women have struggled to gain a place and establish their presence in social life. Mostly, they have continued their life in the position of carrying out family responsibilities. When women want to get involved in the business world, they are facing some problems arising from dogmatic thinking and prejudices, especially among the professions with "male-dominated" judiciary. Maritime profession, one of the oldest professions in the world, was also regarded as a single-gender area until the 20th century. However, in recent years, economical and political changes in the world, equal opportunity in education and incentive works of the International Maritime Organization have led women to work as seafarers. Although female seafarers constitute 2% of the world seafarers, this ratio is higher in developed countries than that of undeveloped or developing countries (URL-1). There is very little information regarding women seafarers in general, including the actual population size. Most of studies focus on passenger ships or cruise ships, not cargo ships (Sohyun, 2010). It is difficult to find relevant studies regarding women seafarers in the world, including in Turkey. In Turkey, women have played an active role and gained an apparent identity in the maritime sector since the 2000s. According to 2015 data, Turkey is ranks the 14th in the world maritime trade with more than 27,6 million deadweight tonnage and manages 1530 vessels (UNCTAD, 2015). In Turkey, many studies related to the employment of seafarers are carried out as in the whole world. However, studies on the employment of women seafarers should be paid more attention. In this study, a questionnaire was carried out with the personnel department managers in Turkish shipping companies. Employment, career, educational status of female seafarers and the general difficulties they face were revealed.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 353-360
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A MCDM approach with fuzzy AHP method for occupational accidents on board
    Autorzy:
    Özdemir, Ü
    Altinpinar, I.
    Demirel, F. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/116385.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Analytic Hierarchy Process (AHP)
    fuzzy AHP
    occupational accidents
    safety at sea
    Fuzzy Multi-Criteria Decision-Making (FMCDM)
    Multi-Criteria Decision-Making (MCDM)
    on-board accidents
    MCDM model
    Opis:
    Occupational accidents on board criteria determining is a challenging procedure in shipping industry as the ideal safety ship management strategy depends on many factors involving in shipping transportation There are many legislations, agreements and practices to obtain series of security measures in order to ensure safety and security of seafarers. Causes of on-board occupational accidents need to be evaluated in a correct manner to regulate more functional practices and also to lower the on-board accident rates. However, causes of on-board accidents can be extremely complex. Therefore, scientific methods should be used to evaluate the causes and to determine the measures to be taken. The evaluation of the parameters is of great importance for the future of the maritime sector and in terms of development. In this study, factors have been identified that lead to seafarers? occupational accidents on board and we tried to present alternative solutions which can be applied on this issue. Severity of the reasons that led to the accidents and their relationships with each other are identified to be able to sort through the alternative solutions with a model using the fuzzy AHP (Analytic Hierarchy Process) method approach. Results of the study revealed that the most important criteria for the occupational accidents on board criteria selection are respectively; human factors, lack of management, ship-borne troubles, cargo troubles and environmental factors.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 93-98
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the solutions of a class of nonlinear functional integral quations in space C [0,a]
    Autorzy:
    Özdemir, İ.
    Çakan, Ü.
    Powiązania:
    https://bibliotekanauki.pl/articles/357700.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    nonlinear integral equation
    measure of noncompactness
    Darbo fixed point theorem
    Darbo condition
    równanie całkowe
    teoria punktu stałego
    miara niezwartości
    twierdzenie Darboux'a
    własność Darboux
    Opis:
    The principal aim of this paper is to give sufficient conditions for solvability of a class of some nonlinear functional integral equations in the space of continuous functions defined on interval [0,a]. The main tool used in our study is associated with the technique of measures of noncompactness. We give also some examples satisfying the conditions of our main theorem but not satisfying the conditions in [8].
    Źródło:
    Journal of Mathematics and Applications; 2015, 38; 105-114
    1733-6775
    2300-9926
    Pojawia się w:
    Journal of Mathematics and Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Correlation between the Double Helix Quantum Wave in d-Wave Superconductors and Human DNA
    Autorzy:
    Güven Özdemir, Z.
    Aslan Çataltepe, Ö.
    Onbaşlı, Ü.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490548.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.72.-h
    71.18.+y
    87.14.gk
    Opis:
    The effective mass of the quasiparticles in a d-wave superconducting system has been calculated via magnetization measurements done by SQUID by using the advanced derivative method used in our previous works. Phenomenological analogy between the double helix quantum wave, which does exist within the primitive cell of the d-wave superconductor, and the human DNA was previously made. In this work, the numerical proof of the analogy mentioned has been realized by determining the magnitude of the attractive force of d-wave structure and comparing with the magnitude of the force that holds the double strand of human DNA that are both of the same order of $10^{-10}$ N. Moreover, the wavelength of the double helix quantum wave of the superconducting system corresponds to ultraviolet region of the electromagnetic spectrum that exactly coincides with the wavelength which is used for exciting the states in human DNA.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 13-15
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biometrical and biochemical properties of fruits of mini cucumber plants grown under various irrigation regimes in an unheated greenhouse
    Autorzy:
    Çebi, U.K.
    Çakir, R.
    Altintas, S.
    Ozdemir, A.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/12193499.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    The study aimed to determine the most appropriate irrigation scheduling for mini-type cucumber plants grown as a spring-summer cycle crop. The research was conducted in a greenhouse structure in the fields of the Research Institute in Kirklareli. Marathon cucumber plants were used as the plant material in the trials. The split plot design experimental layout in 3 replications was used in the research. Four different plant–pan coefficients (0.75, 1.00, 1.25 and 1.50) and two irrigation intervals (2 and 4 days) were applied as subplots and main plots of the study, respectively. As a result of the 3-year investigation, it was determined that yields, number of cucumber fruits, and fresh cucumber fruit weight, length and diameter increased with the increase in the irrigation water amount. The highest average total soluble solids (Brix) value of 5.0 was recorded under conditions of most severe stress imposed on the plots with lowest water application rates of Kcp 0.75. While the lowest values of 4.0–4.1 were obtained for plants growing under more favorable moisture conditions in plots with application of Kcp 1.25 and 1.50. Statistically significant positive linear relationships were obtained for irrigation water amount on one hand, and fruit number, fruit mean weight, fruit length and diameter on the other, while the relationship between water applied and TSS (Brix) was negative.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 5; 199-212
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of Inconel 718 Superalloy by Electric Current Activated Sintering
    Autorzy:
    Ergin, N.
    Ozdemir, O.
    Demirkiran, S.
    Sen, S.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401292.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.20.Ev
    81.40.Cd
    Opis:
    In the present study, the production of Inconel 718 nickel based superalloy was carried out in an electric current activated sintering in open air under a uniaxial pressure of 300 MPa using Al, Ni, Fe, Cr, Ti, Co, Fe-Nb and Fe-Mo powders. This alloy was heat treated, following the conventional treatment which consists of a 1 h solution treated at 980°C, followed by air cooling and double ageing, 8 h at 720°C, furnace cooling at 55°C/h down to 620°C and ageing for 8 h. Optical and SEM examinations showed a dense microstructure with low amount of porosity. XRD studies showed the existence of the γ and MC type carbide (M atom is a Nb, Ti combination) and δ phases. The relative density of sample measured according to Archimedes' principle was 93.7%, and the microhardness of sample was about 343.8 $HV_{0.1}$.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1100-1102
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical, chemical, sensorial and bioactive characteristics of local and standard pear cultivars in Turkey
    Fizyczne, chemiczne, sensoryczne i bioaktywne cechy lokalnych i standardowych odmian gruszy w Turcji
    Autorzy:
    Ozdemir, Y.
    Akcay, M.E.
    Ercisli, S.
    Ozkan, M.
    Ozyurt, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543421.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Some important physical (fruit external color, flesh firmness, fruit size, fruit weight, fruit volume, stone cell), chemical (ash, pH, soluble solid content, sugars, titratable acidity), sensorial (appearance, firmness, sweetness, grittiness, juiciness and overall quality) and bioactive (antioxidant capacity, phenolic compounds, total phenolic content, vitamin C) characteristics of eleven local and one standard pear cultivar were investigated. All cultivars were found in national pear repository in Ataturk Horticultural Central Research Institute in Turkey. Fruit weight of pears was between 56.80 g (‘Kirmizi Biber’) and 128.94 g (‘Erkenci Uzun Sap’). Results showed that ‘Bağ’ cultivar had the highest sensorial scores (8.4 overall quality) and antioxidant capacity (21.44 mg ascorbic acid equivalent∙g-1). Stone cell were found between 63.65 (‘Gümüşhane’) and 81.65 mg dry weight∙g-1 (‘Maslovka’). The cultivar ‘Orak’ showed the highest chlorogenic acid (185.98 mg∙kg-1) and epicatechin (108.26 mg∙kg-1) content.
    Badano niektóre ważne cechy fizyczne (barwa zewnetrzna owoców, zwartość miąższu, masa owoców, rozmiar owoców, pestka), chemiczne (popiół, pH, zawartość rozpuszczalnych substancji stałych, cukry, kwasowość oznaczona), sensoryczne (wygląd, zwartość, słodkość, chropowatość, soczystość i ogólna jakość) oraz bioaktywne (zdolność antyoksydacyjna, związki fenolowe, całkowita zawartość związków fenolowych, witamina C) jedenastu lokalnych i jednej standardowej odmiany gruszy. Wszystkie odmiany pochodziły z krajowego repozytorium w Centralnym Ogrodniczym Instytucie Badawczym w Ataturk w Turcji. Masa owoców wynosiła od 56,80 g (‘Kirmizi Biber’) do 128,94 g (‘Erkenci Uzun Sap’). Na podstawie wyników badań wnioskuje się, że odmiana ‘Bağ’ miała najwyższe noty sensoryczne (ogólna jakość 8,4) i zdolność antyoksydacyjną (21,44 mg ekwiwalent kwasu askorbinowego∙g-1). Sucha masa pestki wynosiła 63,65 (‘Gümüşhane’) i 81.65 mg∙g-1 (‘Maslovka’). Odmiana ‘Orak’ wykazała największą zawartość kwasu chlorogenowego (185,98 mg∙kg-1) i epikatechiny (108,26 mg∙kg-1).
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2016, 15, 3; 127-139
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Tensile Properties of Aluminum 6082-T6 Alloys Joined by Cold Metal Transfer Method by Using Different Working Time
    Autorzy:
    Ozsarac, U.
    Işik, Ş.
    Varol, F.
    Emin Unat, M.
    Özdemir, C.
    Aslanlar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031098.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.20.VJ
    81.70.BT
    Opis:
    In this study, Aluminium 6082-T6 plates having 1.0 mm thickness were joined by magnesium-based (AlMg5) wire in cold metal transfer technique. The specimens were prepared in butt joint form. Argon was used as shielding gas and joining operations were done at gas flow speed of 13 l/min. The joining operations were carried out during four different working times of 25, 30, 35, 40 and 45 seconds. Tensile properties of joints were determined and macro-structures of joints were investigated in order to evaluate the joinability of Aluminium 6082-T6 alloy by cold metal transfer technique. Finally, the micro-hardness values of specimens were measured.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 705-707
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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