Fakülteler

Permanent URI for this communityhttps://acikerisim2.beykoz.edu.tr/handle/20.500.12879/7

Browse

Now showing 1 - 20 of 29

Alterations in Niban Gene Expression as a Response to Stress Conditions in 3t3-L1 Adipocytes
(Springer, 2020) Cevik, Mehtap; Gunduz, Meliha Koldemir; Deliorman, Gokce; Susleyici, Belgin
Adipocyte death is important in obesity development. Understanding and prevention of adipocyte deaths may be a molecular approach in the treatment. In the study, we aimed to understand role of Niban gene, which acts as an anti-apoptotic molecule as a response to stress conditions, in adipocytes. 3T3-L1 adipocytes were treated with different doses of linoleic acid, hydrogen peroxide and ethanol; and proliferation of the cells examined with real time monitoring iCELLingence system. Gene expression levels were measured by q-PCR. As a response to 24h 480 mu M linoleic acid treatment, Niban gene expression was found to be higher than control group (p = 0.008), whereas 24 h 90 mM ethanol treatment was determined to be lower than control group (p = 0.008). The highest value of Niban gene expression among H2O2 treatment groups was detected in 4h 600 mu M H2O2 in comparison to control group (p = 0.008). To understand role of Niban in adipogenesis, Niban gene expressions were compared between pre-adipocytes and advanced fat accumulated adipocytes and determined to be significantly different (p = 0.042). Our results suggest that Niban might be involved in stress response process in adipocytes. However, the exact molecular role of Niban needs to be investigated in further studies.
Binary Particle Swarm Optimization as a Detection Tool for Influential Subsets in Linear Regression
(Taylor & Francis Ltd, 2021) Deliorman, G.; Inan, D.
An influential observation is any point that has a huge effect on the coefficients of a regression line fitting the data. The presence of such observations in the data set reduces the sensitivity and validity of the statistical analysis. In the literature there are many methods used for identifying influential observations. However, many of those methods are highly influenced by masking and swamping effects and require distributional assumptions. Especially in the presence of influential subsets most of these methods are insufficient to detect these observations. This study aims to develop a new diagnostic tool for identifying influential observations using the meta-heuristic binary particle swarm optimization algorithm. This proposed approach does not require any distributional assumptions and also not affected by masking and swamping effects as the known methods. The performance of the proposed method is analyzed via simulations and real data set applications.
Cd Dopant Effect on Structural and Optoelectronic Properties of TiO2 Solar Detectors
(Springer, 2021) Ilhan, Mustafa; Koc, Mumin Mehmet; Coskun, Burhan; Erkovan, Mustafa; Yakuphanoglu, Fahrettin
Al/n-Si/Ti1-xO2CdxO/Al photodiodes were produced using sol-gel and spin coating methods where CdO dopant was applied on different concentrations (x = 0.0; x = 0.01; x = 0.05; x = 0.10). Cd dopant effect upon structural, optical, photodiode and electrical properties was assessed. Scanning electron microscope and energy-dispersive spectra were used in the structural investigation. Optic properties were assessed using UV-Vis spectroscopy and bandgap energies of the photodiodes were calculated which were found to be between 3.25 and 3.36 eV. Increased bandgap energy was observed with increased CdO doping rate. Photodiode properties were assessed under varying daylight illuminations. Barrier height, ideality factor, dark current, linear dynamic rate, photosensitivity, photoresponsivity of the photodiodes were calculated. Electrical properties of the Al/n-Si/Ti1-xO2CdxO/Al photodiodes were calculated where conductance-voltage and capacitance-voltage plots were obtained. Corrective conductance-voltage and corrective capacitance-voltage graphs confirm that the electrical properties of the photodiodes depend on AC signal frequency. Frequency-dependent electrical characteristics were attributed to the density of interface states which were found to be between 10(11) and 10(12). Decreased density of interface state was found for increased AC signal frequency.
Correction: (O-74) Virtual reality technology in anatomy education
(2018) Topuz, Yasemin; Özdener, D.N.; Verimli, U.
[Özet Yok]
Differences in Occupants' Satisfaction and Perceived Productivity in High- and Low-Performance Offices
(MDPI, 2019) Gocer, Ozgur; Candido, Christhina; Thomas, Leena; Gocer, Kenan
This paper reports the results from a dataset comprising 9794 post-occupancy evaluation (POE) surveys from 77 Australian open-plan offices. This paper specifically focuses on a sub-set of 20 offices (n = 2133), identified from ranking 10 offices each, with the least (n = 1063) and highest (n = 1070) satisfaction scores, respectively. The satisfaction scores were evaluated on the basis of seven factors (i.e., building/office aesthetics and quality, thermal comfort and indoor air quality, noise distraction and privacy, personal control, connection to outdoor environment, maintenance and visual comfort, and individual space). Using the POE survey data from 20 offices, regression analyses and two-way ANOVA tests were carried out to understand the differences in occupants' satisfaction and perceived productivity arising from open-plan offices. According to the statistically significant regression analyses results, it was identified that building/office aesthetics and quality (beta = 0.55, p < 0.001) and noise distraction and privacy (beta = 0.33, p < 0.001) were the two strongest predictors contributing perceived productivity in low-performance offices. Two-way ANOVA test results for the 10 high-performance offices indicate that the perceived productivity was strongly associated with the office's physical configuration, the employees' working experience, and the working hours at that office.
Effect of Heat Treatment on Magnetic Properties of Nanocomposite Nd-Lean Nd7Fe73b20 Ribbons
(Springer, 2021) Caglar, Seyit; Kilicaslan, M. Fatih; Atasoy, Ahmet; Tiryaki, Hasan; Erkovan, Mustafa; Hong, Soon-jik
In this work, we explored the effect of heat treatment on high boron and Nd-lean content magnetic Nd7Fe73B20 nanocomposite materials via vibration sample magnetometer (VSM), X-ray diffraction, differential thermal analysis (DTA), and scanning electron microscope (SEM). The Scherer formula was employed to estimate the effect in the crystal size of the heat treatment on high boron and Nd-lean content magnetic Nd7Fe73B20 nanocomposite materials. We heat-treated samples in different conditions to obtain optimum magnetic properties. Our high-throughput fabrication strategy allows us to elucidate the possibility of obtaining Nd-lean nanocomposite NdFeB magnet in terms of the melt-spinning. We evaluated the influence of heat treatment on the Nd-lean NdFeB/alpha-Fe nanocomposite magnets produced by melt-spinning. Here, in the heat-treated ribbon at 750 degrees C for 30 min, we obtained a combination of coercivity of 450 Oe, a high-saturation magnetization of 232 emu/g in the heat-treated ribbon at 650 degrees C for 30 min, which surpasses most traditional nanocrystalline magnets based on Fe-Co and pricey. The results we present here are expected to serve as a guideline for designing new magnets for industrial applications.
The Effect of Job Satisfaction and Self-Efficacy to The Intrapreneurial Behaviors
(Future Academy, 2019) Soran, Semih; Sesen, Harun; Guven, Burcu
Organizations need to constantly make innovations due to the rapid changes in the political, economic, technological and social areas. In this sense, entrepreneurship is one of the concepts that have become more valuable in recent times. Since those which cannot manage to change might lose their competitive advantages and hence organizational effectiveness, the organizations should act as an entrepreneur, discover and employ the individuals having high entrepreneurial spirit and establish a new organizational environment to promote intrapreneurship. Today, the intrapreneurship is now essential for both private and public bodies and agencies. The citizenry who are habituated to the innovative services provided by private firms expect the same services and modern approaches from public institutions. Therefore, public service providers should also reveal the entrepreneurial qualifications of their personnel. In this context, intrapreneurial employees play critical roles in organizational change and development. 175 information technology managers from various businesses have participated in this research. Data were analysed with correlation and regression analysis. The results showed that job satisfaction and self-efficacy are quite effective to explain intrapreneurial behaviours of technology managers. (C) 2019 Published by Future Academy www.FutureAcademy.org.UK
The Effects of Internatıonalızatıon of Productıon on the Turkısh Manufacturıng Industry: An Applıed Study on Foreıgn-Invested Manufacturer-Exporters
(2018) Ergüven, Emre
This study investigates the effects of the transnational corporations’ organization of the production all over the world on the Turkish manufacturing industry (MI) and determines how the Turkish MI is articulated to this global organization. To this aim, it analysed foreign-invested manufacturers in the top-1000 exporters list of the Turkish Exporters Assembly. Semi-structured interviews were conducted with the senior officials of the fifteen out of 101 firms who accepted their titles being revealed. Consequently, internationalization of production reinforced foreigndependent structure of the Turkish MI; and Turkey, an intermediate zone between advanced Western countries and cheap-labour Asian countries, seems as backyard of Europe: R&D units are few, imported inputs are high, value-added is low, there is specialization in the particular stages of the medium-low and medium-high technology production, relatively qualified and cheap intermediate staff is abundant, the highest part of exports is made to Europe, the MI is part of the global production and supply networks. And more importantly, this study shows that it is no more possible for Turkish MI to compete on the basis of cheap labour; and the contradictory policies to overcome this situation are far from increasing the competitive power of the Turkish MI.
The Effects of Transportation Modes on Campus Use: A Case Study of a Suburban Campus
(Elsevier Science Bv, 2019) Gocer, Ozgur; Gocer, Kenan
Efficacy of Organizational Learning and Social Capital in Online Communities of Practice: Dualities and Intersections
(IGI Global, 2017) Gürsoy S.; Yücelen M.
This chapter deals with the evolution of communities of practice by considering two key components which facilitate knowledge sharing: Organizational Learning and Social Capital. Dualities and intersections between the building blocks of these two components are investigated by discussing organizational learning in its explorative and exploitative forms, while considering social capital in its bridging and bonding forms. As a critical contemporary step of evolution, information and communication technologies are also elaborated in order to examine the impact of constant and instant tools on these facilitators of knowledge sharing. The study aims to derive proxies among these components of organizational learning and social capital in order to design an integrated framework that reflects the nature of online communities of practice. © 2018, IGI Global. All rights reserved.
Enforcement of the Anti-Racism Legislation of the European Union Against Antigypsyism
(Routledge Journals, Taylor & Francis Ltd, 2019) Sayan, Pinar
The European Union (EU) became a pioneer of the promotion of human rights and democratic values especially during the last decades. However, the members of the EU are not immune from the human rights violations including the areas of "equality" and "non-discrimination" that are related to racism, discrimination and xenophobia. "Antigypsyism", a form of racism, is among the most challenging human rights areas for the member states despite all recent initiatives. In this research, the use of EU competences to combat antigypsyism is analysed with case studies. It is argued that the use of the competences is limited.
The Forest Products Industry in Turkey
(Academic Journals, 2011) Aksu, Baki; Koc, K. Huseyin; Kurtoglu, Ahmet
This study was conducted to analyze the structure of Turkey's wood products industry and to suggest ways to improve the country's competitive position in global markets. The 415 largest solid wood manufacturers were surveyed using questionnaires administered in personal interviews and by mail. Results reveal that forest product enterprises are geographically clustered in a few provinces. Thirteen percent of respondents are using outdated technology while 63% are using relatively new technology and 24% are using advanced technology. The 2001 economic crisis seriously affected the wood products industry with a 38% decrease in the number of employees and a number of shuttered facilities. Overall, the research indicates that the Turkish forest products industry is fragmented and is experiencing a number of obstacles to further development. Turkey has an established but generally inefficient forest products industry. This article gives an overview of the sector and offers recommendations for improvement. Results from this study can be useful to manufacturers and policy makers in Turkey and other countries with similar industry structures in short and long-term sectoral planning and development.
Happiness and Intention to Leave of Z Generation in Terms of Ihrp
(Future Acad, 2019) Guler, Nihal; Acar, Pinar
The main objective of this research is to reveal the effects of innovative human resources practices (IHRP) on the happiness and intention to leave on Z generation employees. The sample of the study consists of 198 Z generation employees in the banking sector. In our study mixed method (qualitative-quantitative) is adopted. Firstly, the qualitative research design was taken as a model. In this respect, qualitative interviews were conducted with Z generation employees and managers. The face-to-face interviews were conducted with a small sample of 25 subjects. The reason for face-to-face interviews is that participants can freely express themselves without limitation, so that more in-depth data can be collected. Data were categorized by Nvivo 11 qualitative data analysis. In the second part of the mixed method research strategy, the quantitative research method is used to measure the interaction between the variables in our theoretical model. Data were collected from 198 employees by means of survey method and analyzed with SPSS 20 package program. The findings of the study showed that happiness has a mediation effect on innovative human resources practices and intention to leave. (C) 2019 Published by Future Academy www.FutureAcademy.org.uk
Identifiying Digital Literacy of High School Students: A Case of Hendek
(2019) Arık, Kaan; Kıyıcı, Mübin
This research aims to identify digital literacy level of 10 th grade high school students’ and determine those levels in terms of different variables. In this study, the research method was performed according to the relational comparing model as a comparison type. The research population consists of 948 students from all high schools in the province of Hendek at Sakarya in 2016-2017 education season year. And the sampling consisted of 394 students from 5 different high schools. Digital Literacy Scale that translated to Turkish by Hamutoğlu, Güngören, Uyanık and Erdoğan (2017) was used in this research for data collection tool. Personal information section was added by reseacher to scale. Standard deviation, frequency analysis, arithmetic averages, descriptive statistical data, one-way analysis of variance (ANOVA) and independent sample t-test techniques was used to analyze research. The level of high school students' digital literacy; doesn’t vary according to having a personal mobile Internet connection for regular use, the type of university exam scores gets into university exam score, family economic income, active time period on Internet. But gender, having a personal computer for regular use varies according to technical sub-dimensional and active time period on personal computer varies according to technical, cognitive and social dimensions.
Introduction of a Spatio-Temporal Mapping Based POE Method for Outdoor Spaces: Suburban University Campus as a Case Study
(Pergamon-Elsevier Science Ltd, 2018) Gocer, Ozgur; Gocer, Kenan; Basol, Altug M.; Kirac, M. Furkan; Ozbil, Ayse; Bakovic, Mujesira; Ozcan, Baris
Outdoor spaces are important to sustainable cities because they establish a common identity for social life by improving quality of urban living. The relation between outdoor spaces and building groups, competency, use period, and interaction of micro-climatic factors are needed to be investigated from a holistic approach. Unfortunately, the limited and narrow scoped POE studies on outdoor spaces make an overall assessment without causality relation. Other existing studies in outdoor spaces are mostly grouped under the headings such as; user satisfaction, space syntax and behavioral mapping, and biometeorological assessments. The intention of this paper is to introduce a new post-occupancy evaluation (POE) method integrates these studies focusing on various problems in outdoor spaces using spatio-temporal mapping. The comprehensive methodology applied in this research attempted to overcome some of the shortcomings of related studies by conducting a longitudinal study (during a year, as opposed to a few days) and also by objectively analyzing the associations of user behavior and physical attributes as well as the configurational properties of the campus layout. With this method, outdoor spaces can be evaluated in the context of the interaction between the physical environment and its users' behavior and activities, level of satisfaction and perceptions of comfort. The method has been applied on a suburban university campus in Istanbul, Turkey. The main courtyard of the campus has been subjected for map creation and result discussions.
Managing Remote Employees: A Qualitative Research in the Logistics Industry
(Future Acad, 2019) Acar, Pinar; Acar, A. Zafer
It is becoming increasingly difficult to manage organizations operating in today's complex global business environment. In particular, to manage the remote employees, who work outside of the physical boundaries of the firms, in accordance with the management principles and through the organizational purposes is considered one of the most challenging area. Despite their constantly growing numbers, the remote employees have been neglected in recent scientific studies. Meanwhile, most of those rare studies have been conducted on the IT industry and its teleworkers. However, it is known that the truck drivers have been working on behalf of a company for years almost never been in the head office. On the other hand, studies on long-distance drivers generally focus on risk factors, job stress and health of drivers. Therefore, it is a significant shortcoming that those employees, who are the critical link of the transportation function of logistics, have not been subjected on to the scientific management and organizational behaviour researches. Thus, the current study aims to eliminate this gap in this issue. This qualitative research study tries to respond above mentioned research gap with the anti-positivist approach. Contrary to the majority of the recent studies, in spite of employees (drivers), the fleet managers of the large-scale land transport companies in the industry have been selected as the unit of analysis. The data obtained from the open-ended interviews were analysed by Nvivo 12 program. The findings of our study were evaluated and discussed from an interpretive and external perspective. (C) 2019 Published by Future Academy www.FutureAcademy.org.uk
The Marketization of Higher Education in Turkey (2002-2011)
(Palgrave, 2012) Onal, Nevzat Evrim
Mediterranean Diet Adherence in Emerging Adults in Izmir
(Emerald Group Publishing Ltd, 2019) Genc, Mahmut; Genc, Seda
Purpose The purpose of this paper is to evaluate the adherence and abandonment of the Turkish emerging adults in an Izmir University located at western Mediterranean coast of Turkey and to assess potential associations with anthropometric characteristics. Design/methodology/approach A cross-sectional survey (n=494, 18-27 years) carried out in 2017 among emerging adults in University. KIDMED Index was used to assess the degree of adherence Mediterranean Diet (MedDiet). The associations of KIDMED scores with demographic, residency and anthropometric were separately reported. The data were collected through standardized questionnaires directly from participants. Findings The average KIDMED score was calculated 4.862.5. Optimum adherence to the MedDiet was found only in 13.0 percent of participants, whereas 32.6 percent had poor adherence levels. Considering self-reported anthropometric data, the BMI values of the population was calculated as 22.3 +/- 3.9kg/m(2). In population, 13.9 percent of the subjects were underweight, while 16.0 percent were overweight and 3.9 percent obese. A significant association was found between BMI and KIDMED scores both in genders and residency. Originality/value This is the first study reporting the level of adherence to the MedDiet among Turkish emerging adults in terms of residency during education and the first KIDMED study conducted in Izmir located at Aegean Sea. The results support previously proposed transition concept by several scholar from different Mediterranean countries: it was found that only 13 percent of young adults having desired dietary habits in an Aegean city with local traditional cuisine highly affected by Cretan cuisine. These results are significant for University managements and health authorities in order to take actions for returning this transition contrariwise beginning with these groups.
Nano and Micro Satellites as the Pillar of the “New Space” Paradigm
(2020) İnce, Fuat
Six decades after the launch of the first satellite in 1957, space business and space technologies are taking a new turn: From big to small, from primarily government to extensively private sector and from a few players to profusely many. The new paradigm, or “New Space”, as it has been called, can be characterized by new startups with venture capital backing entering the field or in fact leading the field in new innovative applications, universities and countries with no previous space experience joining the bandwagon, lean design and development techniques benefitting from the newly available COTS parts and subsystems, mass production of satellites, constellations of hundreds or thousands of small satellites serving old and new emerging niche needs, small launchers available for reaching orbit at low cost and rather short notice, capability to launch a rocket several times a month, and more exotic applications such as the coming space tourism and asteroid mining. Although there were initiatives in this direction in the previous century, they proved too feeble to set a trend. “New Space” started showing its first signs of emergence after the turn of the millennium. However the market acceptance has really taken root in the last 3 or 4 years. Market data clearly shows an accelerated pace shaping the future of space industry. This paper reviews the developments in the nano and micro satellites considering them as the pillar of the New Space paradigm. The road leading to the present state and the current trends are elaborated. A look to the future points to the proliferation of space applications among the many startups, big and small institutions, however being limited by market forces and survival by a few as the decade proceeds.
Pedestrian Tracking in Outdoor Spaces of a Suburban University Campus for the Investigation of Occupancy Patterns
(Elsevier, 2019) Gocer, Ozgur; Gocer, Kenan; Ozcan, Baris; Bakovic, Mujesira; Kirac, M. Furkan
The design of a livable and comfortable environment has been one of the main aims of sustainable university campus design. The creation of outdoor spaces for accommodating amenities has a positive effect on users with regard to various physiological and psychological aspects. Knowing how daily activity patterns and pedestrian movements are distributed across space is important for assessing whether or not human use and design plans are in fact successful. The aim of this study is to determine occupancy patterns and pedestrian routes in outdoor spaces during different seasons at a sustainable university campus by using spatial statistical analyses that involve ANN, MC and SDE. To perform these analyses, the researchers attempted to use a pedestrian tracking method from camera surveillance to aggregate the required data by conducing a longitudinal study. The data that were aggregated by pedestrian tracking was visualized with the use of a spatio-temporal mapping method in GIS. Logistic GWR was performed to seek the relationship between occupancy pattern (clustered distribution) and design layout of open spaces, comprising the variables of proximity to the attraction centers/entrances, and visual integration. The results confirmed that occupants prefer to use the areas that have high visual integration value and are close to attraction centers.

Browse

Browsing Fakülteler by Language "en"