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İş yerinde gelişmeleri kaçırma korkusunun eğilimsel ve durumsal ilişkileri.
No full textFear of missing out (FOMO) has become a phenomenon studied in different disciplines, with increasing numbers of studies in recent years. Although this phenomenon is often paired with social media and internet use, current studies show that it is not only related to these concepts. With recent research, FOMO studies in business life have begun to appear in the literature, and since FOMO is a new concept, there are various conceptual gaps. We define workplace FOMO (wFOMO) as the fear of missing out on valuable work opportunities, developments, and relationships in the workplace context. Using the decision tree methodology, we measured its relationship with various related dispositional and situational concepts. We also included job search behavior in our study to demonstrate the effect of wFOMO. As a result of the analysis, the wFOMO level was also high in cases where people's social comparison orientation was high, and the perception of uncertainty conditions in the workplace was high. By finding that if wFOMO is high, job search behavior is also high, we underline that wFOMO is an essential concept for individuals and organizations.Gelişmeleri Kaçırma Korkusu (FOMO) son yıllarda artan sayıda çalışmalarla farklı disiplinlerde çalışılan bir olgu haline gelmiştir. Bu olgu sıklıkla sosyal medya ve internet kullanımıyla ilişkilendirilse de mevcut araştırmalar bunun sadece bu kavramlarla ilgili olmadığını gösteriyor. Son dönemde yapılan araştırmalarla birlikte iş hayatındaki FOMO çalışmaları literatürde yer almaya başlamış olup, FOMO yeni bir kavram olduğundan çeşitli kavramsal boşluklar bulunmaktadır. İş yeri FOMO'sunu işyeri bağlamındaki değerli iş fırsatlarını, gelişmeleri ve ilişkileri kaçırma korkusu olarak tanımlıyoruz. Karar ağacı metodolojisini kullanarak bunun çeşitli ilgili eğilimsel ve durumsal kavramlarla ilişkisini ölçtük. İş yeri FOMO'sunun etkisini göstermek için çalışmamıza iş arama davranışını da dahil ettik. Analiz sonucunda kişilerin sosyal karşılaştırma yöneliminin yüksek olduğu ve işyerindeki belirsizlik koşulları algısının yüksek olduğu durumlarda iş yerinde yaşanan FOMO düzeyinin de yüksek olduğu görülmüştür. İş yerinde yaşanan FOMO yüksekse iş arama davranışının da yüksek olduğunu tespit ederek iş yerinde FOMO'nun bireyler ve kuruluşlar için önemli bir kavram olduğunun altını çiziyoruz
Otonom sütur için doku kesiği, sütur iğnesi, ve sütur ipliğinin çoklu kamera akışında görsel yerelleştirilmesi.
No full textAutonomous suturing systems could potentially replace the surgeon in suturing and benefit both patient and surgeon. Automating the suturing process involves many complex challenges and this paper proposes a comprehensive solution to the localization problems. In this context, localization problems refer to the challenges involved in the visual tracking of suture needle, suture thread, and tissue, which are fundamental processes for autonomous suturing that must be robust, precise, and computationally affordable. Surgical instruments' reflective, superfine, or non-rigid structures make their localization a complex problem. The contribution of this study is that it provides a combined algorithm for suture needle and thread detection, an algorithm for tissue cut detection. The overall localization approach proposed here defines the suture needle and its thread with fewer parameters, enabling a more precise and less computationally intensive localization. For the testing of the proposed approach, an experimental setup featuring two 7-DOF robots equipped with surgical instruments and two fully calibrated cameras were utilized. The localization experiments were done using realistic artificial (silicone) tissues and threaded surgical needles. The results of the experiments validated that the proposed method meets the requirements for performing automated robotic sutures.Otonom sütur sistemleri monoton görevlerde cerrahın iş yükünü azaltarak hem hastaya hem de cerraha fayda sağlayabilir. Sütur işleminin otomatikleştirilmesi birçok karmaşık zorluğu içerir ve bu makale, görsel tespit sorunlarına kapsamlı bir çözüm önermektedir. Bu bağlamda, görsel tespit sorunları, gürbüz, kesin ve hızlı olması gereken otonom dikiş için temel süreçler olan sütur iğnesinin, sütur ipliğinin ve dokusunun görsel olarak izlenmesiyle ilgili zorlukları ifade eder. Cerrahi aletlerin yansıtıcı, çok ince veya esnek yapıları, lokalizasyonlarını karmaşık bir problem haline getirmektedir. Bu çalışmada, doku kesiğini otomatik tespit eden bir algoritma, sütur iğnesini ve ipliğini ise bu iki ekipmanın fiziksel bağlantı noktasını kullanarak tespit eden bir algoritma sunulmuştur. Çalışmanın genel tespit stratejisi, sütur iğnesini ve ipliğini daha az parametreyle tanımlayarak, daha kesin ve daha az hesaplama maliyetine sahip bir tespit sistemi uygulamasına olanak sağlar. Tespit sistemlerinin test edilmesi için, cerrahi aletlerle donatılmış iki adet 7-DOF robotu ve iki adet tamamen kalibre edilmiş kameradan oluşan bir deney düzeneği kullanışmıştır. Tespit deneyleri gerçekçi yapay (silikon) dokular ve cerrahi sütur cerrahi iğneleri kullanılarak yapılmıştır. Deney sonuçları, önerilen sistemin otomatik robotik süturun atılmasına yönelik gereksinimleri karşıladığını doğrulamıştır
Cooperation in spare parts systems with penalty cost per unit backlogged
No full textInventory pooling is well known to reduce inventory costs and improve customer service. Although potential benefits are well understood, one important prerequisite to form a stable coalition between independent companies, who like to cooperate to benefit from inventory pooling, is agreeing on a cost allocation such that no group of companies would better off leaving the coalition. Existence of such stable allocations would depend on the scenarios that these companies are cooperating in. In this paper, we study cooperation between a group of companies, who keep spare parts to maintain their expensive equipment, by pooling their inventory in several practically motivated scenarios. To address the cost allocation problem, we borrow concepts from cooperative game theory and examine the core of the resulting cooperative games in each scenario. We especially focus on systems with high penalty cost per unit backlogged, which is modelled as a well known (S - 1, S) inventory system with backlogging. We study cooperation under four scenarios, namely cooperation under penalty cost, cooperation with joint capacity investment, cooperation under service level constraints and cooperation by inventory pooling. The first three scenarios consider cooperation by investing into a central pool of inventory optimally, whereas in the last scenario, companies cooperate by pooling their available inventory only. In most of the scenarios, we show the existence of stable cost allocations by identifying a core allocation, which is easy to compute and, in some, a population monotonic allocation (PMAS). In other scenarios, we present examples explaining why finding a stable allocation might not be possible by showing the core of the resulting games can be empty. To establish these results, we also derive several interesting properties (e.g. subhomogeneity of degree one) of the main performance measure (i.e., average number of backorders).People Programme (Marie Curie Actions) of the European Union, Turke
FSO-based multi-layer airborne backhaul networks
No full textThe deployment of non-terrestrial networks (NTNs) is envisioned to realize a truly global coverage for 6G and beyond. Advances in autonomous avionics and lightweight composite materials have positioned high-altitude platform stations (HAPSs) as viable NTN nodes for future networks in addition to rotary-wing unmanned aerial vehicles (UAVs). In this paper, we address the system-level design of a multi-layer airborne backhaul network where HAPSs and rotary-wing UAVs provide free space optical (FSO) backhaul links to the ground base stations. While HAPS fleets operate in circular tracks at stratospheric altitudes and provide wide coverage, rotary-wing UAVs operate at low and medium altitudes complementing the HAPSs. The aerial backhaul architecture should be designed to provide a seamless connection with base stations without any coverage gap. We present a step-by-step system design methodology for FSO-based airborne backhaul systems. For a given coverage area, we discuss how to select the number of required layers, the number of HAPS tracks, the number of HAPSs per track, the number of UAVs in the lower altitudes, the operation altitude of the middle-layer UAVs, and the number of laser sources per airborne node. We present several numerical results to highlight our findings for typical rural and urban areas.TÜBİTA
Mimarlık tasarımı öğrencilerinin bilgisayarlı tasarım araçlarını kullanmaya yönelik davranışlarını ve davranışsal niyetlerini etkileyen faktörlerin değerlendirilmesi.
No full textSince the advent of computational design technologies, architectural design education in Turkey has undergone qualitative advancements. These changes have not only influenced the design curricula but have also created challenges for students to adapt to these advancements. Existing research on Computational design tools (CD tools) focuses on assessing design students' views, perceptions, and attitudes toward utilizing these tools. This research aims to evaluate final-year architecture design students' usage behavior and behavioral intentions toward using various types of computational design tools by exploring the behavioral, technological, and environmental factors that affect their behavior. The proposed research model is based on The Unified Theory of Acceptance and Use (UTAUT). UTAUT is a highly influential and robust model for comprehending the usage of technology systems. The research employs a quantitative approach to collect and assess the data statistically. Descriptive and Linear Regression Analyses are executed to conduct the analysis. The results reveal that Effort Expectancy (EE) and Attitude (AT) do not influence Usage Behavior (UB), while Social Influence (SI), Facilitating Conditions (FC), and Self-efficacy (SE) have a moderate influence on Usage Behavior (UB). Performance expectancy (PE) and Anxiety (A) have a weak influence on Usage Behavior (UB). It is concluded that Usage Behavior moderately influences students' Behavioral Intentions (BI) to use the CD tools post-graduation. The current research intended to contribute to the literature on architectural education curricula, especially when adopting new CD tools.Hesaplamalı tasarım teknolojilerinin ortaya çıkışından bu yana, Türkiye'de mimari tasarım eğitimi niteliksel ilerlemeler kaydetmiştir. Bu değişiklikler ,yalnızca mimarlık ve tasarım müfredatını etkilemekle kalmadı, aynı zamanda öğrencilerin bu gelişmelere uyum sağlamaları için çeşitli zorluklara da neden olmuştur. Hesaplamalı tasarım araçlarına (BT araçları) ilişkin mevcut araştırmaların, genellikle tasarım öğrencilerinin bu araçları kullanmaya yönelik görüşlerini, algılarını ve tutumlarını değerlendirmeye odaklandığı görülmektedir. Bu araştırma, son sınıf Mimarlık öğrencilerinin, davranışlarını etkileyen davranışsal, teknolojik ve çevresel faktörleri tespit ederek, farklı türdeki hesaplamalı tasarım araçlarını kullanmaya yönelik kullanım davranışlarını ve davranışsal niyetlerini değerlendirmeyi amaçlamaktadır. Önerilen araştırma modeli, Birleşik Kabul ve Kullanım Teorisine (BKKT) dayalı olarak formüle edilmiştir. Sözkonusu modelin, teknoloji sistemlerinin kullanımını anlamak için oldukça etkili bir araç olduğu gözlenmiştir. Bu araştırmada verileri istatistiksel olarak toplamak ve değerlendirmek için nicel bir yaklaşım kullanılmıştır. Burada analizin gerçekleştirilmesi için Tanımlayıcı ve Doğrusal Regresyon Analizleri yapılmıştır. Sonuçlar, çaba beklentisi ve tutumun kullanım davranışını etkilemediğini, sosyal etkinin, kolaylaştırıcı koşulların ve özyeterliliğin kullanım davranışı üzerinde orta düzeyde bir etkiye sahip olduğunu ortaya koymaktadır. Performans beklentisi ve kaygının, kullanım davranışı üzerinde zayıf bir etkiye sahip olduğu görülmüştür. Kullanım davranışının, öğrencilerin mezuniyet sonrası BT araçlarını kullanmaya yönelik davranışsal niyetleri üzerinde orta düzeyde bir etkiye sahip olduğu sonucuna varılmıştır. Mevcut araştırma, ayrıca yeni BT araçlarının benimsenmesinde mimarlık eğitimi müfredatına ilişkin literatüre katkıda bulunmayı amaçlamıştır
Çocuklukta sağlıksız yiyecek tüketimini yordayan faktörler: Çocuk mizacı ve ebeveynler arası çatışma.
No full textThe purpose of the current study was to examine the contributions of children's temperament and interparental conflict to children's unhealthy food consumption. This study also investigated the moderating role of interparental conflict in the relationship between children's temperament and their unhealthy food consumption. Participants were the parents of 199 Turkish children (104 boys) aged between 25-103 months (M=59.16, SD= 14.4). Parents reported on their children's temperament (negative affectivity, surgency/extraversion, effortful control), the interparental conflict, and their children's unhealthy food consumption. Bivariate correlations and hierarchical multiple regression analysis were conducted to test the hypotheses. Results demonstrated that surgency/extraversion was positively, and effortful control was negatively related to unhealthy food consumption in children. Interparental conflict was positively associated with the child's unhealthy food consumption. In addition, interparental conflict both moderated the relationship between children's temperament (negative affectivity, effortful control) and unhealthy food consumption. This study contributes to the literature by addressing the contributions of both temperamental characteristics and interparental conflict on the unhealthy food consumption of children.Bu çalışmanın amacı çocuk mizacı ve ebeveynler arası çatışmanın çocukların sağlıksız yiyecek tüketimine olan katkılarını araştırmaktır. Bu çalışma aynı zamanda ebeveynler arası çatışmanın çocuk mizacı ve çocuğun sağlıksız yiyecek tüketimi arasındaki ilişki üzerindeki düzenleyici etkilerini incelemiştir. Çalışmaya Türkiye'den 25-103 aylık arası (Ort.=59.16, SS= 14.4) çocuğu olan (104 erkek çocuk) 199 ebeveyn katılmıştır. Ebeveynler çocuklarının mizaç özelliklerini (olumsuz duygulanım, dışa dönüklük, kendini ketleme), çocuklarının ne sıklıkla ebeveynler arası çatışmaya maruz kaldığını ve çocuklarının sağlıksız yiyecek tüketim sıklığını raporlamıştır. Hipotezleri test etmek için, iki değişkenli korelasyonlar ve hiyerarşik çoklu regresyon analizi uygulanmıştır. Sonuçlar, dışa dönüklüğün pozitif olarak ve kendini ketlemenin negatif olarak çocukların sağlıksız yiyecek tüketimiyle ilişkili olduğunu göstermiştir. Ebeveynler arası çatışma ise çocukların sağlıksız yiyecek tüketimi ile pozitif olarak ilişkili bulunmuştur. Bunlara ek olarak ebeveynler arası çatışma, çocuk mizacı (olumsuz duygulanım, kendini ketleme) ve sağlıksız yiyecek tüketimi arasındaki ilişkide düzenleyici değişken olarak rol almıştır. Bu çalışma hem çocuk mizacı hem de ebeveynler arası çatışmanın sağlıksız yiyecekler üzerindeki etkisini inceleyerek literatüre katkıda bulunmaktadır
Performance of the CMS electromagnetic calorimeter in pp collisions at √s=13 TeV
No full textThe operation and performance of the Compact Muon Solenoid (CMS) electromagnetic calorimeter (ECAL) are presented, based on data collected in pp collisions at √s = 13 TeV at the CERN LHC, in the years from 2015 to 2018 (LHC Run 2), corresponding to an integrated luminosity of 151 fb-1. The CMS ECAL is a scintillating lead-tungstate crystal calorimeter, with a silicon strip preshower detector in the forward region that provides precise measurements of the energy and the time-of-arrival of electrons and photons. The successful operation of the ECAL is crucial for a broad range of physics goals, ranging from observing the Higgs boson and measuring its properties, to other standard model measurements and searches for new phenomena. Precise calibration, alignment, and monitoring of the ECAL response are important ingredients to achieve these goals. To face the challenges posed by the higher luminosity, which characterized the operation of the LHC in Run 2, the procedures established during the 2011-2012 run of the LHC have been revisited and new methods have been developed for the energy measurement and for the ECAL calibration. The energy resolution of the calorimeter, for electrons from Z boson decays reaching the ECAL without significant loss of energy by bremsstrahlung, was better than 1.8%, 3.0%, and 4.5% in the |η| intervals [0.0,0.8], [0.8,1.5], [1.5, 2.5], respectively. This resulting performance is similar to that achieved during Run 1 in 2011-2012, in spite of the more severe running conditions.SC (Armenia), BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES and BNSF (Bulgaria); CERN; CAS, MoST, and NSFC (China); MINCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); ERC PRG, RVTT3 and MoER TK202 (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); SRNSF (Georgia); BMBF, DFG, and HGF (Germany); GSRI (Greece); NKFIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LMTLT (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MES and NSC (Poland); FCT (Portugal); MESTD (Serbia); MCIN/AEI and PCTI (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); MHESI and NSTDA (Thailand); TUBITAK and TENMAK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (U.S.A.).r Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 724704, 752730, 758316, 765710, 824093, 101115353,101002207, and COST Action CA16108 (European Union); the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Science Committee, project no. 22rl-037 (Armenia); the Belgian Federal Science Policy Office; the Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the "Excellence of Science -EOS" - be.h project n. 30820817; the Be.ing Municipal Science & Technology Commission, No. Z191100007219010 and Fundamental Research Funds for the Central Universities (China); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Shota Rustaveli National Science Foundation, grant FR-22-985 (Georgia); the Deutsche Forschungsgemeinschaft (DFG), under Germany's Excellence Strategy -EXC 2121 "Quantum Universe" - 390833306, and under project number 400140256 -GRK2497; the Hellenic Foundation for Research and Innovation (HFRI), Project Number 2288 (Greece); the Hungarian Academy of Sciences, the New National Excellence Program - UNKP, the NKFIH research grants K 131991, K 133046, K 138136, K 143460, K 143477, K 146913, K 146914, K 147048, 2020-2.2.1-ED2021-00181, and TKP2021-NKTA-64 (Hungary); the Council of Science and Industrial Research, India; ICSC-National Research Centre for High Performance Computing, Big Data and Quantum Computing, funded by the EU NexGeneration program (Italy); the Latvian Council of Science; the Ministry of Education and Science, project no. 2022/WK/14, and the National Science Center, contracts Opus 2021/41/B/ST2/01369 and 2021/43/B/ST2/01552 (Poland); the Fundacao para a Ciencia e a Tecnologia, grant CEECIND/01334/2018 (Portugal); the National Priorities Research Program by Qatar National Research Fund; MCIN/AEI/10.13039/501100011033, ERDF "a way of making Europe", and the Programa Estatal de Fomento de la Investigacion Cientifica y Tecnica de Excelencia Maria de Maeztu, grant MDM-2017-0765 and Programa Severo Ochoa del Principado de Asturias (Spain); the Chulalongkorn Academic into Its 2nd Century Project Advancement Project, and the National Science, Research and Innovation Fund via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation, grant B37G660013 (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, contract C-1845; and the Weston Havens Foundation (U.S.A.)
Bitrate adaptation and guidance with meta reinforcement learning
No full textAdaptive bitrate (ABR) schemes enable streaming clients to adapt to time-varying network/device conditions for a stall-free viewing experience. Most ABR schemes use manually tuned heuristics or learning-based methods. Heuristics are easy to implement but do not always perform well, whereas learning-based methods generally perform well but are difficult to deploy on low-resource devices. To make the most out of both worlds, we earlier developed Ahaggar, a learning-based scheme executing on the server side that provides quality-aware bitrate guidance to streaming clients running their own heuristics. Ahaggar's novelty is the meta reinforcement learning approach taking network conditions, clients' statuses and device resolutions, and streamed content as input features to perform bitrate guidance. Ahaggar uses the new Common Media Client/Server Data (CMCD/SD) protocols to exchange the necessary metadata between the servers and clients. While Ahaggar was a significant step forward, in this study, we focus on three open areas, namely, (i) exploring the performance of Ahaggar in a heterogeneous environment including both Ahaggar and non-Ahaggar clients with varied network conditions and device resolutions, and (ii) quantifying the impact of device resolutions on QoE with Ahaggar. We thoroughly investigate these areas and report our findings. We also (iii) discuss the Ahaggar design choices. Experiments on an open-source system show that Ahaggar adapts to unseen conditions fast and outperforms its competitors in several viewer experience metrics.Singapore MoE Academic Research Fund Tier 2 under MOE's official ; TÜBİTA
Investigating correlates of children's emotional well-being: Parenting stress and child temperament
No full textChildren's emotional well-being may emerge as a result of the dynamic interplay between individual factors, such as temperament and environmental factors, such as parenting stress. The current study aimed to investigate the contributions of child temperament and parenting stress to children's emotional well-being. This study also examined the moderating role of parenting stress on the association between child temperament and children's emotional well-being. Participants were mothers of 219 Turkish preschool children (110 girls) aged 36 months to 76 months (M = 56.95 months, SD = 11.73 months). Mothers reported on children's emotional well-being (emotion regulation, emotion dysregulation, child aggression and child anxiety), temperament (persistence and reactivity) and parenting stress. Persistence was negatively associated with emotion dysregulation and child aggression, while reactivity was negatively associated with emotion regulation and positively associated with emotion dysregulation, aggression and anxiety. Parenting stress was negatively associated with emotion regulation and positively associated with emotion dysregulation, aggression and anxiety. Simple slope analyses revealed that high persistence coupled with low parenting stress was associated with higher emotion regulation, while low persistence paired with high parenting stress was linked to higher child aggression. The findings underline the significance of child temperament and parenting stress for children's emotional well-being.Highlights Temperamental persistence is negatively associated with emotion dysregulation and aggression. Temperamental reactivity is negatively associated with emotion regulation and positively associated with emotion dysregulation, aggression and anxiety. Parenting stress was negatively associated with emotion regulation and positively associated with emotion dysregulation, aggression and anxiety in children.Publisher versio
Comparison of different actuation concepts for the knee joint during stair-climbing
No full textMaximizing efficiency and minimizing metabolic expenditure are pivotal in advancing transfemoral prosthetics. Designing an energy store/release mechanism emerges as a critical pursuit within this scope. This study mainly compares the performance of the direct drive (DD), series elastic actuator (SEA), and parallel elastic actuator (PEA) concepts for a knee joint during the stair-climbing task. Additionally, the conceptual design of an actuator utilizing a mechanism to transfer the generated force by the actuator to the knee joint is proposed. It is shown that the actuator's weight of the proposed robotic knee (Rnee) prosthesis is 68%, 60%, and 31% lighter than the DD, SEA, and PEA concepts, respectively. Notably, a comprehensive scoring method evaluating mass, complexity, backdrivability, and inertia solidifies the Rnee as a beacon of efficiency. Its overall score surpasses the DD, SEA, and PEA concepts by 162%, 23.5%, and 5%, respectively.TÜBİTA