01. Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed

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Citation - Scopus: 1
2,4,6-Tris(p Synthesis and Electron Paramagnetic Resonance (epr) Analysis
(Sakarya University, 2022) Karataş, Ö.; Ceylan, Y.; Koç, Z.E.
A significant group of compounds arise from substituted s-triazine derivatives that have tripodal heterocyclic compound. Compounds classified as heterocyclic possible created the largest and most diverse family of organic compounds. In this study, we reported that a new template has been syntheses from a cyanuric chloride and its diamine derivative. The desired triamine a tripodal 2, 4, 6-tris (p-aminoaanilino)-1, 3, 5-triazine (C21H21N9), called to be TRIPOD, has been obtained from cyanuric chloride with 3 eq of p-phenylenediamine reaction in acetone. After synthesis, TRIPOD sample which was polycrystal form was irradiated by cobalt-gamma source. The electron paramagnetic resonance spectra of TRIPOD were recorded using X-band EPR spectrometer at room temperature in three axes (x, y, z) which are perpendicular at 10o intervals. The EPR spectrum was simulated using computer program and by using the spectrum. The radical structure was determined in the sample. © 2022, Sakarya University. All rights reserved.
Citation - Scopus: 5
Achieving Shojinka by Integrated Balancing of Multiple Straight Lines With Resource Dependent Task Times
(Springer New York LLC, 2019) Atasagun, Y.; Kara, Y.; Can Atasagun, Gözde
The concept of Shojinka, which is an important element of Just in Time production system, is attaining flexibility on the number of workers in a workshop due to demand variations. Even though Just in Time production system adopts U-shaped line layout, traditional straight lines can be combined and balanced in an integrated manner to obtain the advantages of Shojinka. In this case, the problem, which is called Integrated Balancing of Multiple Straight Lines, arises. On the other hand, the basic assumption of assembly line balancing is that every task’s time is fixed. However, in practice, different resource alternatives such as equipment or assistant worker may be available to process a task with different times. The problem in this case is to assign tasks and resources to stations that minimise total cost. In this study, a binary integer mathematical model is presented for integrated balancing of multiple straight lines, assuming that task times are resource dependent. The proposed model is illustrated and validated using several examples. An experimental analysis is also conducted to emphasize the advantages of the integrated balancing concept, compared to the situation in which the lines are balanced independent from each other. The experimental results show that, when multiple straight assembly lines are balanced in an integrated manner with resource dependent task times, an average total cost improvement of 23.105% can be obtained compared to the independent balances of the lines. This is a significant improvement that emphasizes the importance of balancing multiple straight lines in an integrated manner, to take the advantages of shojinka and to adhere to the main philosophy of Just in Time. © Springer Nature Switzerland AG 2019.
Ahmed Adnan Saygun'un Çoksesli Müzikte/türk Çoksesli Müziği'nde Ulusalcılığa İlişkin Kodları?*
(2012) Yöre, Seyit; Gökbudak, Z. Seçkin
Türkiye Cumhuriyeti'nin kuruluş sistemi, Ziya Gökalp ve Atatürk'ün düşünceleri çerçevesinde, ulus-devlet temeline bağlı ulusalcı bir modernleşmeden oluşmuş, bu sistem Türkiye'deki kültürel ve müziksel yaratımı etkilemiş ve böylece, besteciler ulusal müzik malzemeleri ile uluslararası çoksesli müzik tekniklerini birleştirilerek devlet sistemine uygun bir ulusalcı çoksesli müzik yaratmışlardır. Türk çağdaş müziği olarak da anılan bu yeni müziğin ilk kuşak bestecilerinden biri de Ahmed Adnan Saygun'dur. O, müzik eserlerinin yanında, söylemleriyle de müzikte ulusalcılığı vurgulamış ve diğer bestecilerin içinde öne çıkmıştır. Bugüne kadar Saygun ve eserleri hakkında araştırmalar olmasına rağmen, onun ulusalcılık yaklaşımları hakkında doğrudan herhangi bir araştırmaya rastlanmamıştır. Bu çalışmada, Saygun'un çoksesli müzikte/Türk çoksesli müziği'nde ulusalcılığa ilişkin kodları etnomüzikoloji disiplini ve nitel araştırma modelinde literatür ve içerik analizi teknikleriyle araştırılmış, sonuç olarak ortaya çıkan on iki kod Saygun'un görüşleriyle tanımlanarak, yorumlanmıştır
Air Quality of Karaman City, Turkey
(Hysen MANKOLLI, 2020) Mankolli, H.; Toros, H.; Dursun, S.
Karaman is a new and developing city in Turkey's economy is developing and the industry. Geographically, the location of Karaman is located in the south of the Central Anatolia region, in the north of the Taurus Mountains. With its fertile lands, the economy and industry based on Karaman agriculture are developing. Karaman city center has modern industrial facilities open for employment. It is known to have an important industrial potential in recent years. The total surface area of 887 thousand ha of Karaman province; 229 thousand hectares (26%) are flat areas and 654 thousand hectares (74%) are mountainous. The population size is around 250 thousand. Turkey is ahead in the production of bakery products, 35% and 20% of total wheat production is produced by Karaman biscuit manufacturing industry. Turkey, as in general in Karaman in fossil fuel consumption for heating in the cold winter air pollution as it is used in many developed cities is also observed. Traffic vehicles vehicle exhausts and fossil fuels used in industry are other important sources of pollution in the city center. In Turkey, the year 2020 at the beginning of March with the gorilla-19 Covidien epidemic, there has been a significant improvement in air quality. The field dust event that occurred after pandemic virus measures, especially PM pollution increase was observed. © 2020, Hysen MANKOLLI. All rights reserved.
Almanya Münih Bölgesinde Qdaedalus Sistemi ile Gözlemlenen Astrojeodezik Çekül Sapma Verilerinin Ggmplus ve Egm2008 ile Kestirilen Değerlerle Karşılaştırılması
(2020) Albayrak, Müge; Zeray Öztürk, Emel; Bildirici, İbrahim Öztuğ; Hirt, Christian; Guillaume, Sebastien; Shum, C.
Astrojeodezik sistemlerle gözlemlenen astrojeodezik çekül sapma verisi, yeryuvarının gravite alanı ile ilgili önemli bilgiler sağlaması nedeniyle, yerbilimleri alanında, özellikle jeodezi ve jeofizik gibi bilimsel disiplinlerde, yersel, hava ve uydu gravite verilerinin kontrolü ve validasyonunda sıklıkla kullanılmaktadır. Bu çalışmada, Münih bölgesinde yer alan 10 nirengi noktasında astrojeodezik çekül sapma verisi gözlemleyebilmek için total station temelli QDaedalus sisteminden yararlanılmıştır. Gözlemlenen verilerin doğruluğunun ~0.2 yaysaniyesi (?) olduğu saptanmıştır. Yüksek doğruluklu bu veri seti, iki global gravite alan modelinin—Global Gravite Modeli plus (GGMplus) ve Yer Gravite Modeli 2008 (Earth Gravitational Model 2008–EGM2008)—kalitesini değerlendirebilmek için kullanılmıştır. QDaedalus sistemi ile gözlemlenen ve GGMplus modeli ile kestirilen çekül sapma bileşenleri arasındaki farklar, hem Kuzey-Güney (KG) hem de Doğu-Batı (D-B) bileşenlerinde yaklaşık 0.2? olmakla beraber, maksimum farklar K-G ve D-B bileşenlerinde sırasıyla ~0.3? ve ~0.4? olarak tespit edilmiştir. Sonuçlar EGM2008 modeli için analiz edildiğinde ise, gözlemlenen ve EGM2008 ile kestirilen çekül sapma bileşenleri arasındaki maksimum farkların K-G bileşeninde 0.9?; D-B bileşeninde ise 1.8? olduğu saptanmıştır. Dolayısıyla, EGM2008 ile kestirilen değerlerin, GGMplus ile kestirilen değerlere göre doğruluğunun daha düşük olduğu görülmüştür. Bu çalışmadan elde edilen sonuçlar, daha önce İstanbul’da QDaedalus gözlemleri ile EGM2008 ve GGMplus modellerinin kıyaslandığı uygulama sonuçlarıyla da karşılaştırılmıştır. Bu makale kapsamında, İstanbul ve Münih’te aynı sistem ve global gravite alan modelleri kullanılarak elde edilen çekül sapma verileri arasındaki farkların sebepleri tartışılarak, GGMplus ile kestirilen çekül sapma veri setinin, hem Münih hem de İstanbul’da daha yüksek doğruluğa sahip olmasının nedenleri açıklanmıştır.
Citation - WoS: 1
Ambient Particle Matter Pollution of Bosnia District of Konya City, Turkey
(HEALTH & ENVIRONMENT ASSOC, 2019) Dursun, Şükrü
Population growth, urbanization, industrialization and migration have been effected in city in the recent century since the beginning of the world is the most important problems. Konya city Turkey during last 2-3-decade, important province pile pollution has increased a median. Air pollution, which started to be effective after 1975 in Konya, is the most important question of the city today. Konya Metropolitan Municipality Environmental Protection and Control Department's regulation on the subject continues air pollution follows: It is important to board of directors with air pollution. The air quality measuring devices of Konya city are monitored on the regularly and are also shared online for the public to follow. In addition, the appearance of polluting sources influences the causes of a pollutant (Industry, Traffic and Domestic Business) in the city. For this purpose, the project of Modelling Air Quality and Creating Clean Air Action Plans was launched in 2017. Air Pollution monitoring project results, which were prepared and completed in 2009, are aimed to be prepared and already underway. It focusses on reducing airborne levels towards this goal; we evaluate it in every dimension and implement the explanation. Bosnia district of the Konya is the most fast-growing part with parallel to increasing university student in the region. In this study atmospheric particle matter levels were investigated and modelled. Evaluation and evaluation of the measurement results were made by Surfer v8 program and modelling maps were created. Form the results of this study; source of air pollution will be investigated. As a result of the evaluation of the measurement results made at 22 different points, it was observed that when the assessment was made according to the WHO and EPA, values were higher than the limit values at some measurement points.
Amonyum Floroborat Katkılı Pan Nanofiberlerin Termal Davranışının İncelenmesi
(2023) Kahraman, Havva Tutar; Ceyhan, Ayhan Abdullah
Bu çalışmada, Amonyum Floroboratın (AFB), Poliakrilonitril (PAN) polimerinin termal özelliklerine olan etkisi incelenmiştir. Bu amaç için, sürekli nanofiber üretim yöntemlerinden biri olan elektro-spin yöntemiyle, PAN ve AFB katkılanmış PAN (PAN-AFB) nanofiber formunda üretilmiştir. Üretilen nanofiberlerin ısıl bozunma davranışı termal gravimetrik analiz (TGA) ile incelenmiştir. Fiberlerin yapısal karakterizasyonu FT-IR ve SEM teknikleri kullanılarak gerçekleştirilmiştir. Elde edilen sonuçlara göre, PAN içerisine eklenen AFB miktarının artması ile nanofiberlerin ağırlık kaybının azaldığı ve termal kararlılığının arttığı gözlenmiştir. Polimer matrisine AFB katkı oranları %0,2, %0,4 ve %0,6 olarak uygulanmıştır. Bunun yanısıra, SEM analiz görüntüleri, AFB partiküllerinin Poliakrilonitril içerisinde homojen olarak dağıldığını göstermektedir. Deneysel çalışmaların sonuçlarına göre, AFB’nin PAN üzerindeki olumlu etkileri gözlenmiş ve termal direncini artırdığı sonucuna varılmıştır.
Amonyum Floroborat Üretimi ve Üretim Parametrelerinin Belirlenmesi
(2020) Ceyhan, Ayhan Abdullah; Bağcı, Safiye; Baytar, Orhan; Şahin, Ömer
Bu çalışmada, borik asit ve amonyum hidrojen florürün reaksiyonu ile amonyum floroborat (NH4 BF4 ) üretimine ait üretim parametreleri incelenmiştir. Bu amaçla, reaktif besleme oranı, reaksiyon sıcaklığı, karıştırma hızı, karıştırıcı cinsi, ikinci çözücü etkisi parametrelerinin etkileri ayrı ayrı belirlenmiştir. Reaksiyon sonucu elde edilen kristallerin yapısal analizleri ve yüzey morfolojileri ise sırasıyla XRD, FT-IR ve SEM analizleri yapılarak aydınlatılmaya çalışılmıştır. Amonyum floroborat üretimi için en uygun reaksiyon şartları; reaktif besleme oranı, 1:2; reaksiyon sıcaklığı, 90 o C; karıştırıcı cinsi, sıcak hava şeklinde tespit edilmiştir. Limit oksijen indeksi analizleri, amonyum floroboratın mükemmel alev geciktirici olduğunu göstermiştir.
Citation - Scopus: 4
An Analysis and Countermeasures of Fatal Accidents Caused by Firedamp Explosions in Underground Coal Mines in Turkey
(2019) Dursun, Arif Emre
Fatal accidents in underground coal mines in Turkey are common and experienced frequently. The major accident categories for underground coal mining in Turkey are gas related accidents (firedamp and outbursts), roof falls, flooding, fire and transport. In recent years, coal mine gas related accidents in Turkey, which are usually caused by firedamp and outbursts, are still threatening miners’ lives. Firedamp explosions are majorly serious mine accidents that can occur quickly and cause great deal damage. In this study, work-related accidents caused by firedamp and another gas accidents in Turkey between the years 2010-2016 were analyzed. As a result of these analyses, the number of deaths in underground coal mines in the past 7 years is 550 and the fatality rate is found to be 96.86%. The percentage of gases as the cause of the deaths is 70.18%. In this study, countermeasures are proposed that can prevent and control firedamp explosions and other gas related accidents.
Analysis of Factors Affecting Travel Costs in Beyşehir Lake National Park
(Tekirdag Namik Kemal University, 2022) Karakayacı, Zuhal; Karakayacı, Özer; Polat, Ahmet
Milli parklar sahip olduğu doğal, kültürel ve tarihi değerlerle rekreasyonel ve turizm amaçlı olarak değerlendirilmektedir. Türkiye’nin ikinci büyük milli parkı olan Beyşehir Gölü Milli Parkı da farklı zenginliklerle birçok insanın ziyaret ettiği yerlerden biridir. Milli parklar rekreasyon ve turizm amacıyla kullanıldığında, kullanıcılara bir maliyet getirmektedir. Seyahat, bir rekreasyonel faaliyet için tamamlayıcı bir nitelik taşımaktadır, çünkü bu faaliyetin gerçekleşebilmesi için söz konusu alana seyahat etmek gerekmektedir. Bu kapsamda, çalışmada Beyşehir Gölü Milli Parkı’nın seyahat maliyeti ve buna etki eden faktörleri incelenmiştir. Beyşehir Gölü Milli Parkı içinde bulunan çeşitli rekreasyon yerleri için ortalama seyahat maliyeti 252.97 TL, kişi başına düşen seyahat maliyeti 74.93 TL olarak hesaplanmıştır. Seyahat maliyetini etkileyen faktörleri incelemek için ziyaretçilerin seyahat maliyetleri yarı logaritmik regresyon modeliyle analiz edilmiştir. Bağımlı değişken seyahat süresince yapılan harcamaların toplamından oluşmakta, seyahat maliyetini etkileyen faktörler olarak, yaş, eğitim, medeni durum, gelir, geliş sıklığı, geliş amacı, geliş mesafesi gibi değişkenler alınmıştır. Analizlerde kullanılan; gelir, eğitim durumu, medeni durumun ‘’evli’’ olması, parka bir defadan fazla gelmiş olma, parka gelinen mesafe, parkı ziyaretin esas amaç olması ve parkta geçirilen zaman faktörleri ile seyahat maliyeti arasında pozitif bir ilişki bulunmaktadır. Yaş, parka geliş sıklığı ve parka şahsi araçla ulaşım sağlamış olma faktörleriyle seyahat maliyeti arasında ise negatif bir ilişki tespit edilmiştir. Seyahat maliyeti analizlerinde bu faktörlerin ele alınması rekreasyon amacıyla kullanılan alanların ekonomik anlamda değerlendirilmesinde yarar sağlayacaktır. Bir ülkenin önemli doğal kaynağı olan milli parkların ekonomik olarak ta değerlendirilerek milli gelire katkı sağlaması gerçekleştirilmelidir. Bu amaçla, milli parkları turizm faaliyetleri açısından sürdürülebilir hale getirecek çalışmalar doğayı koruyarak yapılmalıdır. Bu çalışmada tespit edilen seyahat maliyetini etkileyen faktörler de dikkate alınarak ilgili birimler tarafından programlar planlanmalıdır.
Analytical Study of the Radioactivity of Some Asphalt Springs in the Heet City, Anbar Governorate, Iraq
(Academic Science Publications and Distributions, 2025) Mahmood, B.A.; Faris, S.S.; Albayati, A.T.; Abdulkareem, N.T.; Eyada, S.O.; Abed, Q.N.
This research aims to estimate pollution levels of the concentrations of238U,232Th, and40K in the soil, water, and asphalt for some Heet City in the west of Anbar Governorate-Iraq to find out the natural and industrial radioactivity contaminations. In this study, the gamma-ray spectroscopy technique was used with a Germanium detector to calculate the levels of radioactivity of natural radionuclides (238U,232Th,40K) in different samples of soil, water, and asphalt collected from (8) areas of Heet City and its nearby regions in Anbar Governorate-Iraq. Through the study results, it was shown that the range of concentration values for238U,232Th, and40k in soil samples ranged from (1.2, 2, and 26) Bq/kg to (810, 506.6, and 435.7) Bq/kg and at an average (147.2, 94,1, and 309.28), respectively. While in asphalt samples, the concentrations ranged between (17 and 48) Bq/kg for both238U and232Th, and for40k, they ranged between (220 and 326) Bq/kg. As for water samples, the study did not detect any concentrations of238U and232Th, and the detected concentrations of40k were very low. In general, from this study, we conclude that the Abu Al-Jeer region contains relatively high radioactivity levels, higher than the permissible global limit in some of its areas. Therefore, periodic and continuous monitoring must be conducted to verify radioactivity in these areas to avoid any potential danger to the population. © 2025, Academic Science Publications and Distributions. All rights reserved.
Citation - Scopus: 3
Anti-Colorectal Cancer Effects of Medicinal Plants: Euphorbia Helioscopia, Ferula Elaeochytris, and Sideritis Albiflora
(2021) Deveci, Ebru; Çayan, Gülsen Tel; Karakurt, Serdar; Duru, Mehmet Emin
Phytochemicals, extracts, and mixtures obtained from plants have been offered as an option for cancer treatment and prevention for modern drug discovery in recent years. For this purpose, in this study, anti-colorectal cancer effects of the hexane, acetone, methanol, and water extracts obtained by sequential extraction from Euphorbia helioscopia L., Ferula elaeochytris Korovin, and Sideritis albiflora Hub.-Mor. on DLD-1 cell line were investigated in vitro by using Alamar blue assay. Dosedependent inhibition was detected in the viability of DLD-1 cell line. In all three plants species, E. helioscopia (IC50: 140.83±0.31 µg/mL), F. elaeochytris (IC50: 67.93±0.12 µg/mL), and S. albiflora (IC50: 85.12±0.10 µg/mL) methanol extracts showed higher anti-colorectal effects on DLD-1 cell line compared to other extracts tested for the same species. In addition, the IC50 value of doxorubicin used as a standard was found as 6.10±0.55 µg/mL. With the results obtained, as the first report highlighting in vitro anti-colorectal cancer effects of the studied plant species on DLD-1 cell line, promising marks were obtained from the analysis of the extracts as anti-cancer sources for plant-derived drug applications.
Citation - Scopus: 11
Antioxidant, Cytotoxic, and Enzyme Inhibitory Activities of Agropyron Repens and Crataegus Monogyna Species
(2020) Deveci, Ebru; Çayan, Gülşen Tel; Karakurt, Serdar; Duru, Mehmet Emin
Objective: The aim of this study was to investigate antioxidant, enzyme inhibitory and cytotoxic activities of Agropyron repens and Crataegus monogyna methanol extracts with total phenolic and flavonoid contents. Materials and Methods: Total phenolic and flavonoid contents of A. repens and C. monogyna methanol extracts were measured according to Folin Ciocalteu and aluminum nitrate methods, respectively. Antioxidant and enzyme inhibitory activities of the methanol extracts were tested spectrophotometrically. Also, cytotoxic activities of the methanol extracts against DLD-1 and CCD-18Co were investigated by using Alamar Blue assay. Results: C. monogyna methanol extract with the highest total phenolic and flavonoid contents (68.13±0.34 µg GAEs/mg extract and 36.91±0.17 µg QEs/mg extract, respectively) had the best antioxidant activity in ?-carotene-linoleic acid ($IC_50$: 32.72±0.15 µg/mL), CUPRAC ($A_0.50$: 282.69±0.25 µg/mL), DPPH• ($IC_50$: 71.69±0.85 µg/mL), and ABTS•+ ($IC_50$: 40.43±0.55 µg/ mL) assays. A. repens methanol extract showed the highest effect against AChE (18.73±0.47 %), BChE (37.59±1.07 %), urease (89.18±0.84%), ?-glucosidase (6.71±0.23 %), whereas C. monogyna methanol extract showed the highest effect against tyrosinase (30.52±1.00%) and ?-amylase (37.24±0.06 %). Also, A. repens ($IC_50$: 57.38 µg/mL) and C. monogyna ($IC_50$: 54.04 µg/ mL) methanol extracts showed close cytotoxic activity on DLD-1. Conclusion: Antioxidant, cytotoxic, and enzyme inhibitory activities of A. repens and C. monogyna methanol extracts were investigated with total phenolic and flavonoid contents in this study. The results obtained with this study strengthen the potential of the studied plants as a new source for the discovery of antioxidant, cytotoxic, and enzyme inhibitor agents.
An Application for Selecting and Evaluating Organization Based Kpis With Fuzzy Mcdm in a Large-Scale Organization Operating in the It Sector
(Springer Science and Business Media Deutschland GmbH, 2023) Yel, İ.; Baysal, M.E.; Sarucan, A.
In today's world, where many people use the outputs of the Information Technologies (IT) industry, it has become a problem for large-scale organizations to compare their IT departments objectively. The use of fuzzy MCDM methods for such a multidimensional problem is evaluated within the scope of this study. As a first step, twenty KPIs were determined by literature review and expert opinion to evaluate organizational units. Subsequently, KPI selection criteria were defined based on the opinions of ten expert personnel working in Architecht Information Systems for the selection of the most appropriate KPIs. These criteria are weighted by the fuzzy AHP method. Eight of the KPIs over the Neutrosophic Z Number (NZN) sets were selected for comparison by the same experts. Four different organizations were ranked by scoring over eight KPIs. It has been confirmed that the results of objective evaluations, instead of subjective evaluations, are more embraced by employees and managers, according to the outputs of the common sense and the infrastructural suitability of the institution. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Application of an Artificial Neural Network for Predicting Compressive and Flexural Strength of Basalt Fiber Added Lightweight
(Tulpar Academic Publishing, 2021) Calis, G.; Yıldızel, S.A.; Keskin, U. S.
Concrete is known as one of the fundamental materials in construction with its high amount of use. Lightweight concrete (LWC) can be a good alternative in reducing the environmental effect of concrete by decreasing the self-weight and dimensions of the structure. In order to reduce self-weight of concrete artificial aggregates, some of which are produced from waste materials, are utilized, and it also contributes to de-velop a sustainable material Artificial neural networks have been the focus of many scholars for long time with the purpose of analyzing and predicting the lightweight concrete compressive and flexural strengths. The artificial neural network is more powerful method in terms of providing explanation and prediction in engineering studies. It is proved that the error rate of ANN is smaller than regression method. Furthermore, ANN has superior performance over nonlinear regression model. In this paper, an ANN based system is proposed in order to provide a better understand-ing of basalt fiber reinforced lightweight concrete. In the regression analysis pre-dicted vs. experimental flexural strength, R-sqr is determined to be 86%. The most important strength contributing factors were analyzed within the scope of this study. © 2021, Tulpar Academic Publishing. All rights reserved.
Citation - Scopus: 4
An Application of Fuzzy Ahp, Edas and Waspas for the Selection of Process Method in Software Projects
(Springer Science and Business Media Deutschland GmbH, 2022) Yel, İ.; Sarucan, Ahmet; Baysal, M.E.
In software development projects, the complexity of the tasks to be completed and the fact that the resources are real people, unlike in the manufacturing sector, are important factors that pose challenges to project management. In addition, operational reasons such as time-dependent changes in software requirements also complicate the management of projects. During the execution of the projects, in addition to the internal dynamics of the project, the organizational characteristics of the participants and the competencies of the team also influence the success of the project. In this context, various software development process methodologies are used for change management, including “Agile and Waterfall Methods”. The aim is to select projects based on technical and managerial criteria by considering the skills of the development teams that actively participate in the project. In the study, the weights of the criteria are determined using fuzzy AHP. Then, Fuzzy EDAS and WASPAS methods are used for ranking the projects and the information technology teams. The statistical information about the errors after software development was obtained as a result of the process management decision made. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Citation - Scopus: 1
Application of Magnetic Biochar@alginate Composite as Adsorbent for Effective Removal of Methylene Blue From Aqueous Media
(ISRES Publishing, 2024) Parlayici, S.; Pehlivan, E.
In recent years, magnetic biochar has been widely used for the removal of dyes in polluted water due to its magnetic separation abilities and has been used as composite adsorbents by incorporating different biomasses into its structure for the removal of such pollutants. In this study, a new composite magnetic biochar@alginate composite (mBC@Alg) was synthesized as an alternative adsorbent for the removal of methylene blue (MB) from aqueous solutions. The primary focus of this intensive preparation procedure is on the synthesis, characterization, and optimization of the mBC@Alg for enhanced MB adsorption capacity. The composite material was characterized using FT-IR analysis and scanning electron microscopy (SEM). Batch adsorption studies experiments were performed to determine the removal efficiencies, pH, adsorbent dose, contact time and initial concentration of MB molecules. Various adsorption isotherms such as Freundlich, Langmuir, Scathard and Dubinin-Radushkevich were used to describe the adsorption behavior at equilibrium. The Langmuir adsorption isotherm was identified as the most appropriate model to explain the observed adsorption phenomena, and the adsorption capacity of mBC@Alg for MB was determined to be 416.67 mg/g using this isotherm. Kinetic studies were carried out using pseudo-first-order and pseudo-second-order kinetic models and it was concluded that the experimental data fit well with the second-order kinetic model. The adsorbent properties of the mBC@Alg composite are particularly effective in removing MB molecules from aqueous solutions. © 2024 Published by ISRES.
Application of Risk Assessment Study at Petro-Processors of Louisiana, Inc. (ppi) Site
(2023) Tutar Öksüz, Seçil
Petro-Processors of Louisiana, Inc. (PPI) site, located North of the city of Baton Rouge Parish, used two sites as depositories for various petrochemical wastes from mainly the 1960s until the 1980s. The main problem was the potential for leachate migration and for exposure of toxic materials, which had been released into local waterways. Therefore, the site is considered a public health hazard area because of risks to human health from past, present, and future exposure to hazardous substances. This study focuses on investigating selected chlorinated organic liquids, which are the predominant contaminants among all wastes: Hexachlorobenzene (HCB) and Hexachlorobutadiene (HCBD) with possible health effects using a risk assessment study. The results show that even though the petrochemical waste disposal has completely shut down since1980, it will still take an average of the HCB and HCBD to reach the domestic well with groundwater is 68 years and 57 years, respectively via slow migration, which will increase the cancer risks for the people who live near PPI site. Our results indicated that the cancer risks of exposure to HCB and HCBD are 4.6x10-6 and 2.6x10-3, respectively, which are more than the 10-6 goal. In addition, this study can be used at similar sites and for different compounds to investigate the potential impacts of pollutants on human health.
An Application With Fuzzy Ahp for Making the Assignment Aimed at the Holistic Benefit Over the Person Evaluation as Required by the Requirements and Evaluations of Individuals
(Springer Science and Business Media Deutschland GmbH, 2023) Yel, İ.; Şahin, H.; Baysal, M.E.; Sarucan, A.
It is assumed that the success rates of information technology (IT) projects will increase with the management of development packages called Most Valuable Product (MVP). This is considered to be a real requirement. Based on this assumption, this study identified different criteria based on the requirements or MVPs to be developed in an organization. The criteria are differentiated for analyst and software developer positions. The level of each criterion was defined by the experts for the development of MVPs. The same criteria were used to evaluate both analyst and software developer positions. After evaluating the MVPs and determining the levels of the individuals, the weights of the criteria were determined using fuzzy AHP to determine the desired level and the levels of the individuals. The minimization problem of which person should be assigned to which MVP package over the weights was solved using the Excel solver. The sums were performed. The result is a balanced distribution of multiple MVP packages within a unit; with the goal of assigning MVP packages to the positions that can best improve themselves and increase overall benefit. Evaluation of employee competencies and needs definitions of projects with fuzzy MCDM method constitutes an important contribution of this study. Under the guidance of the evaluations, erroneous assignments that would lead the project to failure were avoided and more competent people were appointed for more critical requirements. Thus, the potentials of competent persons were utilized at the highest level. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Assessment of Work Accidents in Highway, Street and Bridge Construction
(International Multidisciplinary Scientific Geoconference, 2018) Bilim, Atiye; Çelik, Osman Nuri
Occupational health and safety is an important work discipline that must be included in the working life. Especially, developed countries have been able to place this discipline in working life, while developing countries have still problems. These problems take place both in terms of legislation and practice. The situation is similar to that of developing countries, in Turkey. The construction sector is in line with the development status of a country. The construction sector contributes both directly and indirectly to the country's economy. It has become indispensable for the economy of a country with its share in employment and it stimulates production of goods and services related to the sector. The construction sector is not just about building constructions. We also need bridges, metros and high-speed train lines. Transports have a major contributor to the development of a country. In parallel with technological developments, large investments related with transports become increase. Due to the revival in this sub-sector, the number of work accidents has also tended to increase. Therefore, the work accidents in the highway, street and bridge constructions, which are the sub-activities of the construction sector, must be examined. In this study, work accidents in the sector were analyzed for Turkey and U.S. Also, the share of the sector in total work accidents and construction accidents were determined for Turkey and U.S. The causes of fatal work accidents in highway, street and bridge constructions were mentioned. © 2018, International Multidisciplinary Scientific Geoconference. All rights reserved.

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