WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://gcris.yasar.edu.tr/handle/123456789/11289

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A Canonical 3-D P53 Network Model that Determines Cell Fate by Counting Pulses
(2018-08-03) Gökhan Demirkıran; Güleser Kalaycı Demir; Cüneyt GÜZELİŞ
From a system theory perspective p53 network dynamics is interesting since it can exhibit three dynamical modes of p53 namely low-level equilibrium oscillation and high-level equilibrium. Each of these modes are associated with different cell fate outcomes: cell survival cell cycle arrest and apoptosis.The literature reveals that a high level (apoptosis) is seen only after ending the oscillation phase so called two-phase dynamics which provides thedecision of apoptosis depending on the oscillation duration. This paper proposes that a negative feedback can keep time by counting the pulses ofoscillation to take the decision of apoptosis or cell survival. P53DINP1 which is the mediator of this feedback is added as a variable to a 2-D oscillatormodel of the p53 network. The resulting canonical 3-D model successfully replicates the two-phase dynamics. That is it possesses temporary oscillatorybehavior in which first oscillations (first phase) and then high level state (second phase) are observed. By introducing a new variable to the core oscillatorin the p53 network this study demonstrates that p53 network can be considered a modular structure which consists of an oscillator and other variablesthat control this oscillator to contribute to cell fate determination.
A Comprehensive Evaluation of Yacht Charter Service Concept: Influence of Voyager-to-Voyager Interaction on Service Satisfaction
(2021-09-30) Neslihan Paker; Osman Gök
The study attempts to evaluate yacht charter service attributes considering the service quality customer satisfaction and loyalty three-leg framework. Besides visited destinations the service concept is enlarged with social servicescape dimensions of interaction quality and customer similarity for a holistic approach. A self-administered questionnaire was provided to 359 customers and the relationships in the research model were tested via structural equation modeling. The results showed that satisfaction depends on the interaction quality which is strongly related to the similarity between other customers as well as the quality of the service elements and the attractiveness of the visited destination. This study presents a pioneering research attempt focusing on the influence of customer-to-customer interaction and customer similarity on yacht charter services. Findings of the study provide a theoretical contribution highlighting the importance of customer-to-customer interaction for service appraisals of customers. Theoretical and practical implications for interaction-dominant services are discussed.
A Comprehensive Review of Feature Selection and Feature Selection Stability in Machine Learning
(2023-12-01) Mustafa Büyükkeçeci; mehmet okur
Feature selection is a dimension reduction technique used to select features that are relevant to machine learning tasks. Reducing the dataset size by eliminating redundant and irrelevant features plays a pivotal role in increasing the performance of machine learning algorithms speeding up the learning process and building simple models. The apparent need for feature selection has aroused considerable interest amongst researchers and has caused feature selection to find a wide range of application domains including text mining pattern recognition cybersecurity bioinformatics and big data. As a result over the years a substantial amount of literature has been published on feature selection and a wide variety of feature selection methods have been proposed. The quality of feature selection algorithms is measured not only by evaluating the quality of the models built using the features they select or by the clustering tendencies of the features they select but also by their stability. Therefore this study focused on feature selection and feature selection stability. In the pages that follow general concepts and methods of feature selection feature selection stability stability measures and reasons and solutions for instability are discussed.
A new model for minimizing the electric vehicle battery capacity in electric\rtravelling salesman problem with time windows
(Tubitak Scientific & Technological Research Council Turkey, 2021-09-23) Kazım Erdoğdu; KORHAN KARABULUT; Erdoğdu, Kazım; Karabulut, Korhan
The growing pollution in the environment and the negative shift in the global climate compel authorities\rto take action to protect the environment and human health. Transportation is one of the major contributors to this\renvironmental decay. The harmful gases released to the air by the vehicles using petroleum fuel increase each day. One\rof the solutions is to make a gradual transition to electric vehicles. A major part of manufacturing an electric vehicle\ris to produce an efficient electric motor and battery for it. Reducing the manufacturing and operating costs of these\rcomponents will result in reducing the overall costs of electric vehicles. In this study a new variant of the electric\rtravelling salesman problem with time windows (E-TSPTW) was proposed. The objective function of the problem is to\rminimize the required initial battery capacity of the electric vehicle. For this goal a new energy consumption model\rconsidering the load of the vehicle was proposed with three scenarios. The proposed model was solved with a hybrid\rsimulated annealing algorithm for all these scenarios. The performance of the proposed method was compared to the\rsolutions found by a mixed integer linear programming model. The experimental results on the benchmark instances\rshow that up to a 35% reduction in initial battery capacity hence reduction in its cost is possible.\r
!-CONTINUITY ON GENERALIZED NEIGHBOURHOOD SYSTEMS
(2019-05-30) Esra Dalan Yıldırım
We introduce !-weakly-(g1, g2)-continuous functions on generalized topological spaces and study their relations with other classes of generalized continuous functions given in [1 8]. Then we deÖne the notion of omegaopen set on generalized neighbourhood systems as !-'-open set. By usingthese sets we generate generalized topology. Also we introduce two kinds ofcontinuity on generalized neighbourhood systems and investigate relationshipsbetween these two kinds (', '0)-continuity and weakly-(', '0)-continuity.
Damping wide-area oscillations in power systems: a model predictive control design
(2018) Emrah BIYIK; Munir HUSEIN
Electromechanical oscillations in power systems have been observed ever since synchronous generators were interconnected to provide reliability and higher generation capacity and they have become a severe threat for the safe and economic operation of modern interconnected power grids. To dampen these oscillations wide-area damping controllers (WADCs) have been introduced by utilizing wide-area measurement systems and synchronized phasor measurement units. In this paper we present a systematic approach for designing WADCs using a model predictive control (MPC) technique to damp interarea oscillations in the power system. The MPC controller computes optimal control signals for the excitation system of a remote generator where it will supplement the local power system stabilizers that are used as damping controllers. The performance of the proposed approach has been assessed on the IEEE 16-generator 68-bus test system and it is shown that the interarea oscillations can be effectively and robustly damped under varying operation conditions.
Development of a Scoring Rubric to Assess Training in an Immersive Experience Environment
(2025-07-15) YASİN ÖZARSLAN; Esma ÇUKURBAŞI ÇALIŞIR; Eralp Altun
This research focuses on the development of a scoring rubric (SR) designed to assess occupational health and safety (OHS) training delivered through immersive experience environments. To this end an immersive training module was implemented in the field of electrical safety supported by immersive technologies. The participants were 30 students enrolled in the electrical program of a public university located in the Aegean region. The primary goal was to enhance participants’ awareness of occupational safety and to improve their practical skills in managing potentially hazardous situations. For performance assessment each participant was independently evaluated by three raters using the developed rubric. The collected data were analyzed through Intraclass Correlation Coefficient (ICC) and Generalizability Theory (G-Theory). The ICC analysis yielded a coefficient of 0.936 indicating a strong level of inter-rater consistency. G-Theory results supported the high reliability of the evaluations. Additionally expert evaluations contributed to the validation process of the rubric. Overall the findings indicate that the SR is a valid and reliable tool for evaluating learning performance in immersive OHS training contexts.
Energy Saving Opportunities through Glazing and Shading Alternatives
(2022-12-20) ARZU CILASUN; Süleyman İvgin
Windows are the weakest elements due to their high heat transfer coefficient and are responsible for 60% energy heat/gain loss. Healthcare buildings are one of the biggest consumers of energy due to continuous occupation hours and medical requirements providing comfortable conditions for people in need of care and staff, yet recently less attention was given to healthcare buildings due to their unique operational requirements and advanced medical equipment. Thus the main purpose of this study was to evaluate energy saving potentials of windows through glazing and shading alternatives over a case study. Within this study a single patient room in Izmir Turkey has been chosen as a case study and the room was simulated for sixteen scenarios generated by using four different glazing and shading systems. Each design scenario was simulated using DALEC for their lighting heating cooling and total energy consumption. Results showed that lighting energy consumption constitutes the highest energy demand (up to 52%) and high transmitting glazing usage can reduce lighting loads. Finally up to 16.3% energy saving is possible only by changing shading and glazing types. Though there is a great diversity of glazing and shading types this study’s outputs only reflect the selected four glazing and four shading system types that are offered by DALEC. Healthcare buildings spend a vast amount of energy to provide thermal and visual comfort for various user profiles. Considering the large number of patient rooms in healthcare facilities only careful consideration of glazing or shadings can significantly contribute to energy savings. This study focuses on shading and glazing alternatives as an energy-saving strategy. For simulation an underrecognized BES tool DALEC was hyped to show integrated thermal and visual energy consumption. The findings highlight that energy savings of up to 16.3% is possible.
Examination of Prestigious Mass-Housing Identity via The Slogans: Cases in Izmir Turkey
(2021-12-21) FATMA IPEK EK; OĞUZCAN NAZMİ KURU
The paper aims to make a critical examination of the current prestigious mass-housing projects through the promotional slogans to understand the relationships between the promotional and architectural strategies. Design/Methodology/Approach In the research the archive-based surveys were conducted by utilizing the framework of the case study method. The data were collected from the websites and electronic catalogues of the cases and analysed comparatively to reveal the messages given by the promotions and manifested in the architectural formations. Findings The study makes categorizations for the slogans and architectural services of the cases and proposes that the promotional and architectural identities of the projects refer to a template that provides the sale guarantee and therefore cannot be broken easily to present the alternative living manners. Research Limitations/Implications The study is limited with the 20 similar-scale projects with independent sections of more than 50 households addressing to the high-income level with the prestigious or luxurious qualities and built used or under construction in the period covering 2015-2021 in Izmir city-centre and peripheries. Social/Practical Implications In social respect the findings point out the common interdisciplinary genes creating the templates of the consumer society by manifesting that the high price is related to the services provided within the housing settlement but not the quality of architectural solutions. Originality/Value The paper tries to uncover the possible effects of the slogans in shaping the mass-housing identity for the high-income level and reveal the close relationship between the consumer society and promotion of architecture which results in selling housing projects at high prices with the same promotional and architectural templates.
Financial Openness and Financial Development:Evidence from Emerging Countries
(2020-12-02) Hakan Özkaya; Mehmet Umutlu; Melis Gültekin
We investigate the potential relation between financial openness and financial development for 27 emerging countries for the period between 1996 and 2016. We focus on three dimensions of financial openness: capital account openness trade openness and stock-market openness. In this study we propose alternative measures for capital account and trade openness. Moreover we offer capital flow and valuation-based measures for stock-market openness as a potential determinant of financial development. Our findings indicate that capital account openness and trade openness are the key drivers of financial development. These results are not sensitive to the use of alternative financial openness and financial development measures and are robust after being controlled for institutional quality and its components. Our results have implications for policymakers in emerging countries who try to increase the depth of their financial markets for an easier and cheaper access to funds.
Finansal Stresin Fosil Enerji Emtiaları ile Yeşil Enerji Piyasaları Arasındaki Dinamik Bağlantılılığa Etkisi
(2025-06-30) Efe C. Cagli; Pınar EVRİM MANDACI; Birce Tedik Kocakaya; Dilvin Taşkın
Bu makale FSI (Finansal Stres Endeksi) VIX (Volatilite Endeksi) ve EPU (Ekonomik Politika Belirsizliği) gibi seçili stres değişkenlerinin yeşil piyasalar (hisse senetleri ve tahviller) ile fosil enerji emtiaları arasındaki dinamik bağlantılılık üzerindeki etkilerini incelemeyi amaçlamaktadır. Bağlantılılığı ölçmek için TVP-VAR modelini ve bu stres değişkenlerinin 1 Kasım 2012'den 15 Kasım 2022'ye kadar bu bağlantı üzerindeki etkilerini araştırmak için Fourier Kümülatif Granger Nedensellik testini kullanıyoruz. Sonuçlar esas olarak kısa vadeli dinamiklerden kaynaklanan orta düzeyde getiri bağlantılılığı olduğunu gösteriyor ve bu da çeşitlendirmenin uzun vadeli yatırımlar için daha faydalı olabileceğini gösteriyor. COVID-19 salgını sırasında yüksek bağlantılılık gözlemliyoruz. Bağlantılılık su şirketi hisseleri hariç fosil enerji emtiaları arasında yüksek ancak yeşil hisse senedi ve tahvil piyasaları arasında düşüktür. Su hisselerinin piyasalar üzerinde önemli bir etkisi vardır bunu petrol takip eder. Nedensellik test sonuçlarımız FSI ve VIX'in bunların arasındaki bağlantılılığı etkilediğini göstermektedir.
Günışığı Tüpleri ve Hareketli Gölgeleme Elemanlarını Kullanarak Derin Planlı Bir Sınıfın Günışığı Performansını İyileştirmeye Yönelik Bir Tasarım Önerisi
(2024-09-25) ARZU CILASUN; Ecenur Kızılörenli
Eğitim yapılarında günışığının kullanımı öğrencilerin sağlığı dikkati ve akademik başarısı üzerinde önemli bir etkiye sahiptir. Ancak günışığı sabit olmadığı ve mekân içindeki gücü cepheden uzaklaştıkça azaldığı için özellikle derin planlı sınıflarda kamaşmaya yol açmadan hacmin genelinde yeterli gün ışığı sağlamak zordur. Bu çalışmada derin plan düzenine sahip olan ve sadece güneybatı cephesinden gün ışığı alan Yaşar Üniversitesi Mimarlık Fakültesi Geçici Atölye’sinde günışığından yararlanmayı arttırmak için günışığı tüpleri ve hareketli gölgeleme elemanları önerilmiştir. Öneri oluşturulurken LEED’in günışığı kriterleri olan, sDA için %55 ve ASE içinse en fazla %10’u yakalamak ana hedef olarak belirlenmiştir. Önerilen günışığı tüplerini ve hareketli gölgeleme elemanlarını en etkin açı ve pozisyonda kullanılmak için Rhinoceros Grasshopper ve Climate Studio programlarından faydalanılmış ayrıca simülasyon sonuçları alanda yapılan ölçüm sonuçları ile valide edilmiştir. Simülasyon sonuçlarına göre yapılan öneriyle, sınıfın arka tarafındaki (zone 2-3) günışığı miktarı belirgin şekilde artarken cepheye yakın alanda yaşanan (zone 1) kamaşma kabul edilebilecek aralığa düşürülmüştür. Önerilen tasarım stratejisi ile hacmin günışığı performansı iyileşmiş ve bu iki sistemin birlikte verimli olarak çalıştığı görülmüştür.
Citation - WoS: 3
Güven ve Medya: Covid-19 Pandemi İletişiminde Beş Büyük Faktör Kişilik Özelliklerinin Yansıması
(Marmara Univ, FAC Communication, 2022-06-30) Ebru Gökaliler; Özlem Alikılıç; İnanç Alikılıç; Gökaliler, Ebru; Alikılıç, Özlem; Alikılıç, İnanç
Pandemi süreci genel olarak büyük ölçüde kafa karışıklığı istikrarsızlık yanlış bilgilendirme ve yetersiz planlama gibi sebeplerle tedirginlik yaratan bir süreçtir. Bu çalışma kapsamında COVID-19 pandemisi sırasında sağlık iletişimi sürecinde bireylerin kişilik özelliklerinin bilgiyi arama sürecinde ve gerekli önlemleri almada etkili olduğu varsayımından ve bireysel farklılıkların ilişkilendirilip ilişkilendirilemeyeceği sorusundan yola çıkılmıştır. Çalışma kapsamında Türk halkına yönelik COVID-19 salgını iletişiminin beş büyük kişilik özelliği çerçevesinde bireylerin bilgi alma tercihleri güven duydukları kaynaklar arasındaki ilişkileri Büyük-5 faktörlerine dayalı bireysel farklılıklarını ne şekilde etkilediğini ölçmek amaçlanmıştır. Bu nitel çalışma öncelikle Türk halkının COVID-19 algısında bilgi arama davranışını ve medyadan gelen haberlerin etkisini araştırmayı amaçlamaktadır. İkinci olarak da COVID-19 pandemi iletişimi ile ilgili bilgi edinme tercihlerinde güvendikleri medya kaynakları arasındaki ilişkileri nasıl etkilediğinin ölçülmesi amaçlanmıştır. Ankete katılan bireylerden sorumluluk kişilik özelliğine sahip olanlarda bireylerin sağlık profesyonellerine ve bağımsız sağlık kuruluşlarına güveni en yüksek saptanırken devlet kurumlarına yönelik COVID-19 mesaj içeriklerinde güven düşük bulunmuştur.
Hearing the Voice of the Sector and Graduates and Transferring into the Curriculum
(2020-11-30) Özlem CAKIR; ISIL KELLEVEZIR
Purpose: The economic and social developments ofcountries are strictly dependent on the qualifiedgraduates/workforce that they have. The aim of thisstudy was to determine the quality and skill aspectsof graduates and their satisfaction level of laboursupply and demand in higher education.Research Methods: In this study the data related tothe Foreign Trade Program were collected by thefocus group (composed of program graduates andemployers) interview technique as one of thequalitative research methods. The data obtained fromthe interviews were subjected to content analysis andfindings were obtained on the areas of quality andskill mismatch between supply and demand throughcoding and identification of themes.Findings: The findings showed that employers have expectations in the field of supply chainknowledge Excel knowledge mastery of management information systems ERP knowledge warehouse management port operations logistics knowledge and basic export operations.However employers stated that these qualifications were insufficient in graduates and manyhad to be taught by them on the job. Graduates on the other hand have stated that when theythink about the difficulties they have experienced in the business world they realize theirshortcomings only when they start working.Implications for Research and Practice: According to the findings it is consideredappropriate to carry out such research with a participant profile in other fields of highereducation including representatives of the relevant business world academic representativesand representatives of the central authority. The connection between the labour market andthe education system can be established in a healthy way by carrying out the work in differenthigher education programs
Hizmet lojistiğinde iş atama ve rotalama politikaları tasarımı
(2019) Ayhan Özgür TOY; Zehra DÜZGİT; Simge ÇOBAN; Zeynep ALİBAŞOĞLU; Özlem TOK ÖZKESKİN; Mert KARAKAYA; Yücel BAYRAK
Bu çalışmada ev aletleri endüstrisinde satış sonrası teknik servisin verimliliğini arttırmayı ele almaktayız. Verimlilik ölçütü müşteri taleplerini karşılamak üzere harcanan toplam süredir. Böylece amaç satış sonrası teknik hizmetlerinde harcanan toplam çalışma saatinin en küçüklenmesidir. Öncelikle işlerin tamamlanmasındaki gecikmenin nedenlerini belirtmek üzere sistemi analiz ettik. Analiz bulgularımız neticesinde verimliliği arttırmak üzere iş atama ve iş sıralamaya odaklanmayı seçtik. Teknisyenleri işlere atayan ve her teknisyen için bir günde harcanan toplam zamanı en aza indirgeyecek şekilde rota belirleyen karışık bir tamsayı programlama modeli önerilmiştir. Bu model ile iş sürelerinin beklenen değeri için problemi çözmekteyiz. Önerdiğimiz çözüm yöntemini gösterecek bir sayısal çalışma da sunmaktayız.
İstanbul Hilton Otel’in Türkiye’deki Yüzyıl Ortası Otel Binaları Üzerindeki Etkileri
(2019-07-31) Zeynep Tuna ULTAV; Funda UZ; Hande ATMACA ÇETİN
1950’li yıllar Amerika’nın savaş sonrası elde ettiği güç ile dünya ekonomisini ve kültürünü etkilediği yıllardır. Gelişen tüketim kültürü ve ulaşım ağları ile mobilite artmış oteller dönemin sosyo-politik ekonomik ve mimari durumunun bir sonucu olarak çoğalmıştır. 1950’li yıllarda Amerika’da zincir oteller ortaya çıkarak deniz aşırı yayılmış ve mimari olarak Uluslararası Stil’in “Amerikan Modernizmi” olarak tanımlanan bir versiyonunu takip etmiştir. Uluslararası Stil’in modern oteller üzerinden yayılması en belirgin olarak Hilton Oteller ile olmuştur. Türkiye’ye ilk modern otel Hilton Otel ile gelmiş böylece 1950’li yıllarda Hilton Oteli sonrasında yapılan birçok otel Uluslararası Stil’den etkilenmiştir. Turizm tartışmalarının arkasında Hilton Otel sıkça bir model olarak kabul edilmiş mimarlıkta ise bu mimari dilin koşulsuz yayılması tartışmalara sebep olmuştur. Bu çalışmanın odak noktası 1950-1960 yılları arasında Uluslarası Stil’de yapılan ve İstanbul Hilton Oteli ile yapısal benzerlikler taşıyan Türkiye’deki otel binalarıdır. Hilton Oteli'nin 1950'lerde diğer otel binaları üzerindeki etkisi tartışılırken dönemin turizm tartışmalarına da yer verilerek Hilton Oteli’nin Türkiye’deki etkisi daha geniş bir perspektifte aktarılmıştır. Çalışma amacıyla seçilen oteller Hilton Oteli ile en büyük yapısal benzerliği taşıyan oteller arasından 1950’li yıllarda inşa edilmiş ya da inşaatına başlanmış olan Büyükada Anadolu Kulübü Oteli Çınar Otel Eskişehir Porsuk Oteli Büyük Efes Oteli Büyük Tarabya Oteli ile ele alınmış bu oteller üzerinden Uluslararası Stil’in ve Hilton Otel’in Türkiye’de modern turizm mimarisi üzerindeki izleri sürülmüştür.
KOBİ’lerde Kredi Derecelendirme Performansını Etkileyen Faktörlerin Analizi
(2019-04-30) ebru esendemirli; Arıkan Tarık saygılı; Gokhan Isik
Küçük ve Orta Ölçekli İşletmeler’de (KOBİ) işletme ve işletmenin hakim ortağı ile ilgili finansal ve finansal olmayan göstergelerin kredi notu üzerinde önemli etkisi bulunmaktadır. Bu çalışma işletme ve hakim ortak ile ilgili genel faktörler finansal faktörler ve istihbarat faktörlerinin karmasından oluşan KOBİ kredi derecelendirme sistemlerini inceleyerek bir model önerisi geliştirmektir. Bu araştırma istihbarat faktörlerinin etkisini araştıran ilk çalışmadır. Regresyon yöntemi ile Türkiye’de faaliyet gösteren 125 KOBi’nin gerçek verileri analiz edilmiştir. Analiz sonuçlarına göre 17 bağımsız değişkenden 9 tanesi ile KOBİ kredi notu arasında istatistiksel olarak anlamlı ilişki vardır. Bu kapsamda analiz sonuçları kapsamlı olarak değerlendirilmiştir.
Citation - WoS: 3
Citation - Scopus: 5
Mathematical models for the periodic vehicle routing problem with timewindows and time spread constraints
(Ramazan Yaman, 2020-09-10) Damla Kizilay; Hande Öztop; Zeynel Abidin ÇİL; Kizilay, Damla; Öztop, Hande; Çil, Zeynel Abidin
The periodic vehicle routing problem (PVRP) is an extension of the well-knownvehicle routing problem. In this paper the PVRP with time windows and timespread constraints (PVRP-TWTS) is addressed which arises in the high-valueshipment transportation area. In the PVRP-TWTS period-specific demands of thecustomers must be delivered by a fleet of heterogeneous capacitated vehicles overthe several planning periods. Additionally the arrival times to a customer shouldbe irregular within its time window over the planning periods and the waiting timeis not allowed for the vehicles due to the security concerns. This study proposes novel mixed-integer linear programming (MILP) and constraint programming(CP) models for the PVRP-TWTS. Furthermore we develop several validinequalities to strengthen the proposed MILP and CP models as well as a lowerbound. Even though CP has successful applications for various optimizationproblems it is still not as well-known as MILP in the operations research field.This study aims to utilize the effectiveness of CP in solving the PVRP-TWTS. This study presents a CP model for PVRP-TWTS for the first time in the literature to the best of our knowledge. Having a comparison of the CP and MILP models can help in providing a baseline for the problem. We evaluate the performance ofthe proposed MILP and CP models by modifying the well-known benchmark setfrom the literature. The extensive computational results show that the CP modelperforms much better than the MILP model in terms of the solution quality. 4
Mode of Arrival Aware Models for Forecasting Flow of Patient and\rLength of Stay in Emergency Departments
(2022-03-29) Mustafa Gökalp Ataman; görkem sariyer
Aim: Flow of patients to emergency departments (EDs) and their stays in EDs (ED-LOS) depend significantly on their arrival modes. In this\rstudy developing effective models for forecasting patient flow and length of stay (LOS) in EDs by considering arrival modes led better planning\rof ED operations.\rMaterials and Methods: In this study by categorizing the mode of arrival into two self-arrived in and by ambulance autoregressive\rintegrative moving average (ARIMA) models are applied for forecasting four time series: daily number of patients self arrived/arrived by an\rambulance and average LOS of patients self-arrived/arrived by an ambulance. The models are validated with real-life data received from a\rlarge-scaled urban ED in İzmir Turkey.\rResults: While seasonal ARIMA is proper for forecasting the daily number of patients on both modes non-seasonal models are proper for\rforecasting the average LOS. The mean absolute percentage errors (MAPE) for the models of four time series are 5 432% 13 085% 9 955% and\r10.984% respectively. Thus daily arrivals to the EDs show seasonality patterns.\rConclusion: By emphasizing the impact of mode of arrival in ED context this study can be used to aid the strategic decision making in the\rEDs for capacity planning to enable efficient use of the ED resources.
On generalized derivations of incline algebras
(Hacettepe Univ, FAC Sci, 2014) ŞULE AYAR ÖZBAL; Alev FİRAT; Ozbal, Sule Ayar; Firat, Alev
In this paper as a generalization of derivation of an incline algebra thenotion of generalized derivation in an incline algebra is introduced andsome of its properties are investigated in an incline and integral inclinealgebra.

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