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Öğe How do household coping strategies evolve with increased food insecurity? An examination of Nigeria's food price shock of 2015–2018(Wiley, 2024) Quinton, Justin; Jenkins, Glenn P.; Olasehinde‐Williams, GodwinFaced with a significant devaluation of its currency and a surge in food prices, the Nigerian government prohibited the use of foreign currency for food imports. This essentially blocked the importation of numerous food items under the guise of stimulating the domestic output of these staples. Consequently, food prices in Nigeria increased despite a global decline in food prices, and the incidence and severity of food insecurity escalated. This study examines the changes in the types and severity of coping mechanisms for food insecurity resulting from the food price shock caused by the oil price crash, currency devaluation, and restrictions on foreign exchange. Nigeria's General Household Survey Panel data from 2012 and 2015, during periods of high oil prices, is compared with data from 2018 when oil prices had remained low, the currency had been devalued, and the treasury had been depleted. Alongside detailed descriptive statistics, logistic and hurdle regressions are employed for statistical analysis. Findings indicate a rise in the percentage of Nigerian households grappling with food insecurity from 2015 to 2018. During this period, 68.7% of households resorted to at least one coping mechanism, 31.8% adopted six or more coping strategies, and 43.2% resorted to severe coping strategies. The issue stems not primarily from natural disasters or conflicts but from a failure in macroeconomic and agricultural economic policies. Our findings confirm that these policies come at great cost, particularly to female‐headed households, single‐parent households, households headed by elderly people, and other vulnerable populations, pushing them deeper into food insecurity.Öğe Biyolojik Ritim Değerlendirme Görüşmesinin Türkçe sürümünün güvenilirliği ve geçerliliği(Cumhuriyet Univ Tip Fak Psikiyatri Anabilim Dali, 2012) Aydemir, Ömer; Akkaya, Cengiz; Altınbaş, Kürşat; Kora, Kaan; Sücülluoğlu Dikici, Didem; Akdeniz, Fatma; Kalaycı, FatmaAmaç: Bu çalışmanın amacı Biyolojik Ritim Değerlendirme Görüşmesinin (BRDG) Türkçe sürümünün güvenilirlik ve geçerliliğini ortaya koymaktır. Yöntem: Araştırma üç üniversite hastanesi psikiyatri anabilim dalı ve bir eğitim hastanesi duygudurum bozuklukları birimlerine başvuran ve iki uçlu tip I bozukluk tanısı konan 79, iki uçlu tip II bozukluk tanısı konan 26, majör depresif bozukluk tanısı konan 42 hasta ile, üniversite öğrencilerinden oluşan 116 sağlıklı gönüllüden oluşan gruplarla yürütülmüştür. Hastalık süresi iki uçlu bozukluk grupları için 15.1 yıl ve majör depresif bozukluk grubu için 9.3 yıldır. Birlikte geçerliliği değerlendirmek amacıyla Pittsburgh Uyku Kalitesi Ölçeği uygulanmıştır. İstatistiksel değerlendirmede iç tutarlılık katsayısı, madde-toplam puan bağıntı katsayıları, açıklayıcı ve doğrulayıcı faktör çözümlemesi, diğer ölçekle bağıntı ve ROC eğrisi hesaplanmıştır. Bulgular: BRDG önce Türkçeye, sonra İngilizceye çevrilmiş ve çeviriler sonunda dil birliğiyle ölçek metni elde edilmiştir. İç tutarlılık çözümlemesinde Cronbach alfa katsayısı 0.899 ve madde-toplam puan bağıntı katsayıları 0.239-0.747 arasında elde edilmiştir. Açıklayıcı faktör çözümlemesinde varyansın %56.5‟ini açıklayan toplam üç faktör elde edilmiştir: Günlük etkinlikler, uyku ve yeme alışkanlıkları, kişilerarası ilişkiler. Doğrulayıcı faktör çözümlemesinde karşılaştırmalı uyum endeksi 0.932 ve tahminin ortalama kare kök hatası 0.065 olarak bulunmuştur. BRDG‟nin Pittsburgh Uyku Kalitesi Ölçeği ile bağıntısı r=0.238 olarak hesaplanmıştır. Özgüllük ve duyarlılık çözümlemesinde ROC eğrisinin altında kalan alan 0.876 olarak bulunmuştur. Ölçeğin duygudurum bozukluğu gruplarını kontrol grubundan ayırt ettiği görülmüştür. Sonuç: Hastaların günlük döngüsel ritmini ve bu ritime uygun olarak işlevselliğini değerlendirmeye elverişli BRDG‟nin Türkçe formunun güvenilir ve geçerli olduğu gösterilmiştir.Öğe Affective temperament profiles of overactive bladder patients reply(Aves, 2016) Sarıbacak, Ali; Altınbaş, Kürşat; Yılmaz, Hasan; Özkan, Alp; Özkan, Levend; Oral, Timuçin[Abstract Not Available]Öğe RADIAL BASIS AND LVQ NEURAL NETWORK ALGORITHM FOR REAL TIME FAULT DIAGNOSIS OF BOTTLE FILLING PLANT(Univ Osijek, Tech Fac, 2014) Demetgul, Mustafa; Yazicioglu, Osman; Kentli, AykutIn this study, an Artificial Neural Network (ANN) is developed to find faults rapidly on a pneumatic system. The data were saved and evaluated considering system is working perfectly and faults are predetermined. These faults include having no bottle, a nonworking cap closing cylinder B, a nonworking bottle cap closing cylinder C, insufficient air pressure, water not filling and low air pressure faults. The signals of six sensors were collected during the entire sequence and the 18 most descriptive features of the data were encoded to present to the ANNs. Two different ANNs were applied for interpretation of the encoded signals. The ANNs tested in the study were learning vector quantization (LVQ) and radial basis network (RBN). The performance of LVQ and RBN was found to be fine with the presented procedures for a system having very repetitive sequential data.Öğe VITAMIN E LOADED FABRICS AS COSMETOTEXTILE PRODUCTS: FORMULATION AND CHARACTERIZATION(Ege Univ, 2018) Basyigit, Zeynep Omerogullari; Kut, Duck; Yenilmez, Evrim; Eyupoglu, Seyda; Hocaoglu, Emel; Yazan, YaseminSkin fights constantly during the day to be saved from free radicals caused by UV rays and pollution. However, skin cells repair damage and restore complexion during sleep. Enhancement of repair and restoration can be achieved more effectively by the cosmetic products such as antioxidants applied during night. In this study, functional fabrics were prepared for single- use which are impregnated with three different delivery systems containing vitamin E, the mostly known antioxidant ingredient. Comparison of vitamin E release from microcapsule, microemulsion and solid lipid nanoparticle systems embedded in polypropylene fabrics (PP) was aimed in this study. Final purpose of preparing a cosmetotextile for ocular area was to obtain prolonged activity of vitamin E. Following particle size measurement and scanning electron microscopic analyses of all delivery systems prepared, systems embedded in polypropylene nonwoven fabrics were tested for vitamin E meant to be released over time. According to the results obtained, vitamin E was found to be successfully incorporated into all three delivery systems and release of vitamin E was determined to be prolonged best by solid lipid nanoparticles.Öğe QUASICONFORMAL HARMONIC MAPPINGS RELATED TO STARLIKE FUNCTIONS(Eudoxus Press, Llc, 2014) Polatoglu, Yasar; Duman, Emel Yavuz; Kahramaner, Yasemin; Aydogan, MelikeLet f = h(z) + <(g(z))over bar> be a univalent sense-preserving harmonic mapping of the unit disc D = {z is an element of C parallel to z vertical bar < 1}. If f satisfies the condition vertical bar w(z)vertical bar = vertical bar g'(z)/h'(z)vertical bar < k, (0 <= k < 1), then f is called k-quasiconformal harmonic mapping in D. The aim of this paper is to investigate a subclass of k-quasiconformal harmonic mappings.Öğe ADAPTIVE WIENER-TURBO SYSTEM AND ADAPTIVE WIENER-TURBO SYSTEMS WITH JPEG & BIT PLANE COMPRESSIONS(Istanbul Univ, Fac Engineering, 2007) Buyukatak, Kenan; Ucan, Osman N.; Gose, Ersin; Osman, Onur; Kent, SedefIn order to improve unequal error protection and compression ratio of 2-D colored images over wireless environment, we propose two new schemes denoted as Adaptive Wiener-Turbo System (AWTS) and Adaptive Wiener-Turbo Systems with JPEG & Bit Plane Compressions (AW-TSwJBC). In AW-TS, there is a feedback link between Wiener filtering and Turbo decoder and process iteratively. The scheme employs a pixel-wise adaptive Wiener-based Turbo decoder and uses statistics (mean and standard deviation of local image) of estimated values of local neighborhood of each pixel. It has extra-ordinary satisfactory results of both bit error rate (BER) and image enhancement performance for less than 2 dB Signal-to-Noise Ratio (SNR) values, compared to separately application of traditional turbo coding scheme and 2-D filtering. In AW-TSwJBC scheme, 2-D colored image is passed through a color & bit planes' slicer block. In this block, each pixel of the input image is partitioned up to three main color planes as R, G, B and each pixel of the color planes is sliced up to N binary bit planes, which corresponds to binary representation of pixels. Thus depending on importance of information knowledge of the input image, pixels of each color plane can be represented by fewer number of bit planes. Then they are compressed by JPEG prior to turbo encoder. Hence, two consecutive compressions are achieved regarding the input image. In 2-D images, information is mainly carried by neighbors of pixels. Here, we benefit of neighborhood relation of pixels for each color plane by using a new iterative block, named as Adaptive Wiener-Turbo scheme, which employs Turbo decoder, JPEG encoder/decoders and Adaptive Wiener Filtering.Öğe Some Double Lacunary Sequence Spaces defined by Orlicz Functions(Southeast Asian Mathematical Soc-Seams, 2011) Savas, E.; Patterson, R. F.In this paper we introduce a new concept for lacunary strong P-convergent with respect to an Orlicz function and examine some properties of the resulting sequence space. We also show that if a sequence is lacunary strong P-convergence with respect to an Orlicz function then it is 8 theta(r,s),-convergent. In addition, lacunary strong P-convergent with respect to an Orlicz function is compared to other summability methods.Öğe MOBILE VISUAL ACUITY ASSESSMENT APPLICATION: AcuMob(Istanbul Univ, Fac Engineering, 2017) Akbulut, Akhan; Aydin, Muhammed Ali; Zaim, Abdul HalimThis paper presents a mobile healthcare (mHealth) system for estimation of visual impairment that provides easiness by specifying the degree of an eye as orthoscopes. Our proposed system called AcuMob which is an Android based mobile application aimed to be used by patients who have myopia. In the crowd society, our proposed app will be implemented faster than the traditional ophthalmologic examination treatments as an alternative. Because AcuMob can be used in everywhere in any time slot, it is offered in the area where the ophthalmologist is not available. The system is developed with using Xamarin framework and voice commands are used to interact with mobile app. Some preferable letters that are suggested by the ophthalmologists were used in the system. The letter categories are specified according to letters' sizes. In the start-up screen, the biggest letter is demonstrated and if the user responds correct answer, the letter's size is being smaller. However, if the user says wrong answer three times consecutively, eyesight ratio is produced by the system to the user referencing to Snellen Chart's information. This article has aimed at making a prediction about the visual impairment's degree. Thanks to AcuMob, people can get idea about their visual acuity without consulting to an eye medical doctor (MD). For the evaluation of systems' reliability, field tests were performed at Bayrampasa Goz Vakfi Hospital in Istanbul with two ophthalmologist specialists. At the end of trials, the actual diagnosed degrees and the equivalent degree of eyesight ratios according to Snellen Chart's information is compared and the success rates are shown. The system achieved at the 65% of average success rate, which can give users an idea about current condition of their visions.Öğe ASYMPTOTIC EQUIVALENCE OF DOUBLE SEQUENCES(Hacettepe Univ, Fac Sci, 2012) Patterson, Richard F.; Savas, EkremThe goal of this paper is to present a four-dimensional matrix characterization of asymptotic equivalence of double sequences. This will be accomplished with the following notion of asymptotic equivalence of double sequences. Two double sequences are asymptotic equivalent if and only if P - lim(k), (l) x(k,) (l)/y(k,) (l) =1, where x and y are selected judicially. Using this notion necessary and sufficient conditions on the entries of a four-dimensional matrix are given to ensure that the transformation will preserve asymptotic equivalence.Öğe ANALYZING ACTIVATION ENERGY AND BINARY CHEMICAL REACTION EFFECTS WITH ARTIFICIAL INTELLIGENCE APPROACH IN AXISYMMETRIC FLOW OF THIRD GRADE NANOFLUID SUBJECT TO SORET AND DUFOUR EFFECTS(Begell House Inc, 2023) Shafiq, Anum; Colak, Andac Batur; Sindhu, Tabassum NazThe use of nanotechnology has led to the design of many modern and more cost-effective implementation, such as solar power generation, the redevelopment of heat exchangers, and the modernization of the medical and pharmaceutical industries. In this study, the combined effects of activation energy with binary chemical reactant in a steady magnetohydrodynamic mixed convective third-grade nanofluid flow by radially radiative stretching plate has been analyzed with an artificial intelligence approach. Heat transfer analysis was conducted with heat generation, Joule heating, and Soret and Dufour effects. By incorporating appropriate transformations, the initial nonlinear coupled partial differential equations expressing the fluid model were formed as a comparable nonlinear ordinary differential equations system. Three different artificial neural network models were proposed in order to predict the skin friction, Nusselt number, and Sherwood number values of the fluid model by the Shooting Runge-Kutta Fehlberg 4, technique using the data set created by taking various values of the relevant parameters. It is worthy of noting that the average deviation values for each output parameter remained less than 5%. Furthermore it is also observed that mean square error values for skin friction coefficient, local Nusselt number, and local Sherwood number values were attained as 3.63 x 10(-3), 4.03 x 10(-4), and 8.62 x 10(-3), respectively. The obtained results show that artificial neural networks are an engineering tool that can be used with high accuracy to estimate the combined effects of activation energy and binary chemical reaction in a fixed magnetohydrodynamic mixed convective third-grade nanofluid flow with a radial radiative stretched plate.Öğe ON I? -STATISTICAL CONVERGENCE OF ORDER ? IN INTUITIONISTIC FUZZY NORMED SPACES(Editura Acad Romane, 2015) Savas, EkremIn this paper, following a very recent and new approach, we introduce the notions of I -statistical convergence and I-theta -statistical convergence of order alpha, where 0 < alpha <= 1, with respect to the intuitionistic fuzzy norm (mu,nu) and we mainly investigate their relationship, and also make some observations about these classes.Öğe Women and Hegemonic Masculinity in Diplomacy: Changing Norms and Practices(Uluslararasi Iliskiler Konseyi Dernegi, 2018) Suleymanoglu-Kurum, Rahime; Rumelili, BaharTraditionally male-dominated, diplomacy has entered into a period of transformation with large numbers of women entering the profession. This article introduces the main contributions of the limited number of studies which analyses diplomacy from a gender perspective, and surveys the prevailing masculine norms in diplomacy through examples from different countries. Subsequently, the article discusses how a similar transformation is underway in Turkish diplomacy. Drawing on published memoirs and interviews of female diplomats, it is found that while masculine norms remain prevalent in Turkish diplomacy, they are also weakening gradually with higher numbers of Turkish female diplomats being promoted to prestigious posts.Öğe SUPPLIER SELECTION WITH TOPSIS METHOD IN FUZZY ENVIRONMENT: AN APPLICATION IN BANKING SECTOR(Yildiz Technical Univ, 2015) Ayvaz, Berk; Bolturk, Eda; Kactioglu, SibkatEvaluation and selection of the appropriate supplier is complicated and time consuming decision making process for companies. Selection of inappropriate supplier leds to higher cost and it influences negatively business process of companies in competitive environment. In this paper, fuzzy-TOPSIS method, considering combination of quantitative and qualitative evaluation criteria, is presented to select appropriate supplier under uncertain environment. The proposed model is applied to the electronic signature purchasing process of a firm that operates in banking sector in Turkey. Quality, purchasing costs, additional costs (maintenance, training, and update costs etc.), security level, compatibility with existing IT infrastructure, after-sales support, and technical competence are selected for supplier selection process in accordance with a detailed literature review and experts' opinions.Öğe Operators ideals of generalized modular spaces of Cesaro type defined by weighted means(Eudoxus Press, Llc, 2015) Şimşek, Necip; Karakaya, Vatan; Polat, HarunIn this work, we investigate the ideal of all bounded linear operators between any arbitrary Banach spaces whose sequence of approximation numbers belong to the generalized modular spaces of Cesaro type defined by weighted means. Also, we show that the completeness of obtained operator ideals.Öğe COMPUTER NETWORK OPTIMIZATION USING GENETIC ALGORITHM(Istanbul Univ, Fac Engineering, 2006) Akbulut, Olcay; Osman, Onur; Ucan, Osman N.In this paper, Genetic Algorithm (GA) is proposed as optimization software to find the shortest path of various computer networks. It deals with different method concerning the placement routers, routes the packages. The genetic based algorithm defines an optimum way when a computer network system is constructed. Genetic Algorithm gives better results regarding other classical methods as the number of nodes of the network increases.Öğe The Role of Mindfulness between Childhood Abuse and Trait Anxiety(Turkish Psychologists Assoc, 2018) Cesur, Gizem; Sayrac, Neslihan; Korkmaz, EceMindfulness is a recent interesting concept that is known to be a protective trait in terms of psychological well-being (Branstrom et al., 2011) and it is being used as a psychological intervention method (Kimbrough et al., 2010). The main purpose of this study was to examine the direct effect of childhood traumatic experiences on trait anxiety as well as its indirect (mediated) effect through mindfulness. The sample of the study consisted of 467 participants; 264 female (56.5%) and 203 male (43.5%). The average age of the sample was 22.89 (SD = 3.34). Demographic Information Form, Childhood Trauma Questionnaire, Mindful Attention Awareness Scale and Trait Anxiety Inventory were used to collect data. The mediator role of the mindfulness was examined with PROCESS macro by Hayes (2013). Results indciated that mindfulness plays a mediating role between childhood abuse and neglect experiences and trait anxiety. Consequently, studying childhood traumatic experiences and trait anxiety with mindfulness is thought to provide a comprehensive explanation on this issue. It could also provide valuable knowledge and insights on intervention and prevention studies.Öğe AUTOMATIC COLON SEGMENTATION USING CELLULAR NEURAL NETWORK FOR THE DETECTION OF COLORECTAL POLYPS(Istanbul Univ, Fac Engineering, 2007) Kilic, Niyazi; Osman, Onur; Ucan, Osman N.; Demirel, KemalIn this paper, an automatic colon segmentation method for Computed Tomography (CT) colonography is presented. Colon segmentation is considered in order to prevent the time consumption while searching polyps out of the colon region and reduce radiologists' interpretation time. The proposed method is the combination of pre-processing and Cellular Neural Networks (CNN). Also recurrent perceptron learning algorithm (RPLA) is used for CNN training. Original CT images are passed through a threshold and then CNN is used to erase unrelated small objects and smooth sharp corners. It is expected automatic colon segmentation will improve the radiologists' diagnostic performance.Öğe FUZZY MULTI-ATTRIBUTE SCORING METHODS WITH APPLICATIONS(Springer, 2008) Kahraman, Cengiz; Birgun, Semra; Yenen, Vedat ZekiThe multi-attribute scoring methods are widely used while comparing the alternatives because of their simplicity. In the case of incomplete information and vagueness, these multi-attribute scoring methods have been extended to obtain the fuzzy versions. In this chapter, fuzzy simple additive weighting methods and fuzzy multiplicative weighting methods are explained with numerical examples.Öğe DEVELOPING COMPUTATIONAL FLUENCY WITH THE HELP OF SCIENCE: A TURKISH MIDDLE AND HIGH SCHOOL GRADES STUDY(Turkish Online Journal Educational Tech-Tojet, 2011) Corlu, M. Sencer; Capraro, Robert M.; Corlu, M. AliStudents need to achieve automaticity in learning mathematics without sacrificing conceptual understanding of the algorithms that are essential in being successful in algebra and problem solving, as well as in science. This research investigated the relationship between science-contextualized problems and computational fluency by testing an instructional method that was implemented as a non-traditional drill exercise. The study employed a quantitative analysis of pre- and post-test scores of Turkish middle and high school students after two interventions. The questions addressed were: Do the science-contextualized drill practices (SCP) improve students' computational fluency better than traditional drill practices (TP)? Is there any statistical significance between middle and high school students in terms of their benefit from SCP? This study showed that science-contextualized drill exercises produced higher gains for both middle and high school students' computational fluencies than the traditional context-free drill exercises.
