Search Results

Now showing 1 - 10 of 89
  • Review
    Citation - Scopus: 7
    Ion Exchange Membranes for Reverse Electrodialysis (red) Applications - Recent Developments
    (Amirkabir University of Technology - Membrane Processes Research Laboratory, 2021) Eti,M.; Othman,N.H.; Guler,E.; Kabay,N.
    The innovative membrane-based technology called reverse electrodialysis (RED) is capable of producing electrical power from the controlled mixing of two aqueous streams of different salinity. There has been tremendous progress so far in the development of RED process in terms of system development, spacer design, membranes properties and operational conditions optimization. Among those, characteristics of the ion exchange membranes are found to be the critical element affecting the performances of RED process. In this respect, a brief overview of the latest developments in ion exchange membranes were presented in this review, focussing on their properties and performances in RED applications. The recent developments of nanocomposite and ion selective membranes, particularly pore filling ion exchange membranes due to their high performances and inexpensive fabrication cost were also summarized. Shortly, fouling problem for the ion exchange membranes employed in the RED system was mentioned. © 2021 Amirkabir University of Technology - Membrane Processes Research Laboratory. All rights reserved.
  • Review
    ÖRGÜTSEL YAŞAM EVRELERİ İNSANLARIN YAŞAM EVRELERİNE BENZERLİK GÖSTERİR Mİ?
    (2023) Kemikkıran, Nurcan; Çınar, Esra
    Bu çalışmanı amacı, insanların yaşam evreleri ve yaşamlarındaki önemli olayların örgütlere benzetilerek, örgütlerin yaşam evrelerini ve yaşamlarını etkileyen önemli süreçlerin farklı örgüt kuramları çerçevesinde kuramsal olarak tartışılmasıdır. Çalışma kapsamında, örgütlerin yaşam evreleri nasıl değişir sorusuna yanıt aranmıştır. Bu kapsamda; doğum, büyüme, hayatta kalma, bağımlılık ilişkileri, evlilik, ev alma, araba alma, mülk edinme, sosyal ilişkiler ve ölüm gibi bireylerin yaşamları boyunca deneyimlediği süreçler ile örgütsel evreler arasındaki benzerlik işlem maliyeti kuramı, koşul bağımlılık kuramı, kaynak bağımlılığı kuramı, kurumsal kuram, örgütsel ekoloji kuramı, sosyal ağ kuramı ve sosyal sermaye kuramı ile ilişkilendirilerek açıklanmıştır. İnsanların yaşam döngüsü doğum ile başlar ve ölüm ile sonra erer ve örgütler de aynı döngü içerisinde varlıklarını devam ettirmektedir. Bu döngü içerisinde insanlar bazı hayati faaliyetleri yerine getirmekte ve bazı süreçleri de deneyimlemektedir. Benzer şekilde örgütler de bu döngü içerisinde faaliyetlerini gerçekleştirmektedir. Bu döngünün anlaşılmasında farklı örgütsel kuramlar değişik bakış açıları sunarak bu döngünün birçok yönüyle anlaşılmasını sağlamaktadır.
  • Review
    Citation - WoS: 41
    Citation - Scopus: 57
    Drawing the Big Picture of Games in Education: a Topic Modeling-Based Review of Past 55 Years
    (Pergamon-elsevier Science Ltd, 2023) Ekin, Cansu C.; Polat, Elif; Hopcan, Sinan
    The literature of games in education has a rich and multidisciplinary content. Due to the large number of studies in the field, it is not easy to analyze all relevant studies. There are few studies exploring the big picture of research trends in the field. For this reason, the purpose of this study is to examine longitudinal trends of game-based research in education using text mining tech-niques. 4980 publications were retrieved as an experimental dataset indexed by the SCOPUS database in the period 1968 to mid-2021. The results include descriptive statistics of game-based research, trends of the research topics, and trends in the frequency of each topic over time. They show that the number of studies focusing on the use of games in education has increased, particularly since the 2000s when Internet use accelerated and became widespread. Approxi-mately 70% of all the studies were conducted in the last 10 years. One third of the studies is related to the main topic of game-based learning. It is significant that in the last three decades the topic of serious games has been among the top three trends. Considering usage acceleration of the topics, the highest values belong to game-based learning, serious games and student science games, in that order. The findings of this study are expected to guide the field by providing a better understanding of the trends of games in education and offer a direction for future research.
  • Review
    Citation - WoS: 91
    Citation - Scopus: 105
    Recommendations for Head and Neck Surgical Oncology Practice in a Setting of Acute Severe Resource Constraint During the Covid-19 Pandemic: an International Consensus
    (Elsevier Science inc, 2020) Mehanna, Hisham; Hardman, John C.; Shenson, Jared A.; Abou-Foul, Ahmad K.; Topf, Michael C.; AlFalasi, Mohammad; Holsinger, F. Christopher
    The speed and scale of the global COVID-19 pandemic has resulted in unprecedented pressures on health services worldwide, requiring new methods of service delivery during the health crisis. In the setting of severe resource constraint and high risk of infection to patients and clinicians, there is an urgent need to identify consensus statements on head and neck surgical oncology practice. We completed a modified Delphi consensus process of three rounds with 40 international experts in head and neck cancer surgical, radiation, and medical oncology, representing 35 international professional societies and national clinical trial groups. Endorsed by 39 societies and professional bodies, these consensus practice recommendations aim to decrease inconsistency of practice, reduce uncertainty in care, and provide reassurance for clinicians worldwide for head and neck surgical oncology in the context of the COVID-19 pandemic and in the setting of acute severe resource constraint and high risk of infection to patients and staff.
  • Review
    Citation - Scopus: 3
    Reconsidering Development Aid: a Systemic Analysis
    (Pluto Journals, 2020) Gülseven,Y.
    In the political and academic debates on development aid in the post-Cold War years, there is often reference to a “new aid architecture.” This study explores what is new about this “new architecture of aid” and traces change and continuity by comparing the form and essence of aid architecture in the Cold War and the post-Cold War years. It discusses to what extent development aid can be interrogated within the inter-systemic competition during the Cold War period. After having located aid into a systemic framework, it seeks to understand the emergence of the “new aid architecture” in the post-Cold War years. To this end, it first analyses the relevance of aid to the hegemonic project that pursues the proletarianization of the world’s poor. It then focuses on aid’s role in transforming social and industrial relations to promote capitalist competitiveness at the global level. In this respect, it pays particular attention to “global value chains.” This study argues that “new aid architecture” is nothing more than an attempt to set a new framework for the role and contribution of aid in expanding and deepening the hegemony of capital over labor on a global scale in the absence of the Soviet factor. © 2020 Pluto Journals. All rights reserved.
  • Review
    Citation - WoS: 25
    Citation - Scopus: 23
    Real-Time Biosensing Bacteria and Virus With Quartz Crystal Microbalance: Recent Advances, Opportunities, and Challenges
    (Taylor & Francis inc, 2023) Bonyadi, Farzaneh; Kavruk, Murat; Ucak, Samet; Cetin, Barbaros; Bayramoglu, Gulay; Dursun, Ali D. D.; Ozalp, Veli C. C.
    Continuous monitoring of pathogens finds applications in environmental, medical, and food industry settings. Quartz crystal microbalance (QCM) is one of the promising methods for real-time detection of bacteria and viruses. QCM is a technology that utilizes piezoelectric principles to measure mass and is commonly used in detecting the mass of chemicals adhering to a surface. Due to its high sensitivity and rapid detection times, QCM biosensors have attracted considerable attention as a potential method for detecting infections early and tracking the course of diseases, making it a promising tool for global public health professionals in the fight against infectious diseases. This review first provides an overview of the QCM biosensing method, including its principle of operation, various recognition elements used in biosensor creation, and its limitations and then summarizes notable examples of QCM biosensors for pathogens, focusing on microfluidic magnetic separation techniques as a promising tool in the pretreatment of samples. The review explores the use of QCM sensors in detecting pathogens in various samples, such as food, wastewater, and biological samples. The review also discusses the use of magnetic nanoparticles for sample preparation in QCM biosensors and their integration into microfluidic devices for automated detection of pathogens and highlights the importance of accurate and sensitive detection methods for early diagnosis of infections and the need for point-of-care approaches to simplify and reduce the cost of operation.
  • Review
    Citation - WoS: 4
    Citation - Scopus: 4
    Smart Hydrogels in Lab-On (loc) Applications
    (Elsevier, 2024) Tevlek, Atakan; Cretin, Esin Akbay
    Laboratory on-chip (LOC) technology facilitates numerous developments across diverse disciplines, such as medicine, tissue engineering, materials science, biomedical engineering, and biotechnology. Moreover, the potential applications appear boundless when LOC is integrated with intelligent hydrogels. In the literature, however, there are few accounts of the vast array of developments and applications that this combination has spawned. These new systems, which integrate smart hydrogels and LOC and thus significantly advance cuttingedge technology, have been thoroughly examined in this review. The functions of smart hydrogels in LOC applications were described and subsequently the developed intelligent hydrogels were classified as multiresponsive, thermo-responsive, pH-responsive, and stimuli-responsive (light, magnetic, and electric). Following this, details regarding tunable properties for LOC functions were provided, followed by a discussion of the fabrication processes and integration of these intelligent hydrogels into LOC systems, including their benefits and drawbacks. Following that, current literature examples of LOC systems utilizing these intelligent hydrogels for biosensing, 3D culture, tissue engineering, controlled release, personalized medicine, drug delivery, analyte enrichment, and organ-on-a-chip applications were presented. Following the presentation of state-of-the-art information regarding smart hydrogel characterization techniques, present challenges and prospective prospects were discussed.
  • Review
    Citation - WoS: 7
    Citation - Scopus: 8
    Stereotactic Radiosurgery After Subtotal Resection of Critically-Located Grade I Meningioma: a Single-Center Experience and Review of Literature
    (Turkish Neurosurgical Soc, 2021) Karaaslan, Burak; Celtikci, Emrah; Bulduk, Erkut Baha; Borcek, Alp Ozgun; Kurt, Gokhan; Kaymaz, Memduh; Emmez, Hakan
    AIM: To analyze the results of stereotactic radiosurgery in 295 patients with residual Grade I meningiomas located at parasellar region, petroclival region, cerebellopontine angle and parasagittal region. MATERIAL and METHODS: A total of 295 patients with Grade 1 residual Meningiomas (197 women, 98 men), who were treated by adjuvant radiosurgery in Gazi University Gamma Knife Center between 2004-2015 were analyzed. WHO Grade 2 and 3 meningiomas were not included in our study. Minimum radiological follow-up was 24 months. The median follow-up was 54 months. The tumor volume, location, treatment dose, morbidity, progression free survival and tumor control rate were analyzed. RESULTS: The median tumor volume was 5.2 cm(3) (0.04-39.7), median age was 50 (20-80), median dose was 14 Gy and tumor control rate was 94.5% (stationary in 85.0%, volume reduction in 9.5%). Increase in tumor volume was seen in 16 patients (5.5%) and re-operation was performed in 5 of them (1.6%). Stereotactic radiosurgery was performed again for 8 patients (2.7%).The location of the tumors was as follows: 39.3% parasellar region, 20% cerebellopontine angle, 13.6% petroclival and 27.1% was parasagittal, falcine or convexity. Major morbidities were detected in 6 (2%) patients. Minor morbidities were detected in 18 (6.1%) patients. CONCLUSION: Stereotactic radiosurgery is an effective and safe treatment modality for residual Grade I meningiomas.
  • Review
    Citation - WoS: 2
    Citation - Scopus: 5
    Machine Learning for Sustainable Reutilization of Waste Materials as Energy Sources - a Comprehensive Review
    (Taylor & Francis inc, 2024) Peng, Wei; Sadaghiani, Omid Karimi
    This work reviews Machine Learning applications in the sustainable utilization of waste materials as energy source so that analysis of the past works exposed the lack of reviewing study. To solve it, the origin of waste biomass raw materials is explained, and the application of Machine Learning in this section is scrutinized. After analysis of numerous papers, it is concluded that Machine Learning and Deep Learning are widely utilized in waste biomass production areas to enhance the quality and quantity of production, improve the predictions, diminish the losses, as well as increase storage and transformation conditions. The positive effects and application with the utilized algorithms and other effective information are collected in this work for the first time. According to the statistical analysis, in 20% out of the studies conducted about the application of Machine Learning and Deep Learning in waste biomass raw materials, Artificial Neural Network (ANN) algorithm has been applied. Afterward, the Super Vector Machine (SVM) and Random Forest (RF) are the second and third most-utilized algorithms applied in 15% and 14% of studies. Meanwhile, 27% of studies focused on the applications of Machine Learning and Deep Learning in the Forest wastes.
  • Review
    Citation - WoS: 3
    Citation - Scopus: 3
    Spatial Effectiveness in High-Rise Timber Towers: a Global Perspective
    (Mdpi, 2024) Ilgin, Huseyin Emre; Aslantamer, Ozlem Nur
    High-rise timber structures signify a rising trend, thanks to their significant environmental and economic advantages that occur over their complete lifespan. Enhancing spatial effectiveness in these structures is a critical design consideration for project feasibility. Currently, there has been no comprehensive study on the space efficiency of such towers. This article analyzed 79 cases all over the world to deepen the knowledge of design features shaping spatial efficiency. The critical findings are as follows: (1) the most common architectural preferences include residential function, a centrally located service core, and prismatic arrangements; (2) the preferred structural material is composite, while a shear walled frame system is the favored structural system; (3) the average spatial efficiency and percentage of core area to GFA were recorded at 84% and 10%, ranging from the lowest values of 70% and 4% to the highest values of 95% and 21%, respectively; and (4) no significant differences were detected in the effect of core design approaches on spatial effectiveness if appropriately planned, with similar inferences drawn concerning form and the structural material used. This article will assist in developing design directions for different interested parties, including architectural designers taking part in the advancement of high-rise timber towers.