5916 research outputs found
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Media-over-QUIC transport vs. low-latency DASH: A deathmatch testbed
No full textLow-Latency Dynamic Adaptive Streaming over HTTP (LL-DASH) leverages Common Media Application Format's (CMAF) chunked packaging and HTTP's chunked transfer encoding capabilities to cater to the demand for media delivery with latencies of those achieved by the traditional broadcast. Nevertheless, to achieve lower latencies in a scalable and reliable way, the Internet Engineering Task Force (IETF) recently started developing a QUIC-based solution, termed Media-over-QUIC Transport (MOQT). This paper presents the first testbed to compare LL-DASH and MOQT, comparing their performance and usability under different network conditions
Citizenship hierarchies: Talent programs, commodification debates and citizenship at the nexus of market and desirability logics
No full textIn recent years, an increasing number of nations have developed and institutionalized immigration programs aimed at attracting high-net-worth individuals, promising expedited residency and, in many cases, a streamlined path to citizenship. These initiatives target individuals expected to contribute economically, whether through immediate financial investments, capital transfers, or desirable professional skills deemed essential for national economic competitiveness. This article critically examines the rise of talent programs against the backdrop of scholarship studying investment-based citizenship schemes. While there is a developed literature studying investment-based citizenship programs and criticizing the imposition of neoliberal rationalities on state-induced meanings and practices of citizenship, there is less attention paid to the implications of these so-called merit-based citizenship programs. We argue that both sets of schemes follow a neoliberal market logic, prioritizing immigrants based on their perceived economic value. We explore how these programs disembed potential immigrants from their social contexts and perpetuate market-based inequalities. Thus, we propose that despite the distinctions often made between talent programs and investment schemes, both contribute to the reinforcement of a global citizenship hierarchy. Drawing on examples from Organization for Economic Co-operation and Development (OECD) countries' skilled migration initiatives, we demonstrate how these programs shape discourses of selectivity and "deservingness" for future citizenship. Through a comprehensive analysis of legal frameworks and policy databases, the study highlights the complex interplay between migration policies, commodification of citizenship, and global hierarchies. Ultimately, it calls for a deeper understanding of the continuities and transformations in citizenship logics enabled by the infusion of market dynamics into migration policies.Publisher versio
Search for stealth supersymmetry in final states with two photons, jets, and low missing transverse momentum in proton-proton collisions at √s=13 TeV
No full textThe results of a search for stealth supersymmetry in final states with two photons and jets, targeting a phase space region with low missing transverse momentum ((Formula presented)), are reported. The study is based on a sample of proton-proton collisions at (Formula presented) collected by the CMS experiment, corresponding to an integrated luminosity of (Formula presented). As LHC results continue to constrain the parameter space of the minimal supersymmetric standard model, the low (Formula presented) regime is increasingly valuable to explore. To estimate the backgrounds due to standard model processes in such events, we apply corrections derived from simulation to an estimate based on a control selection in data. The results are interpreted in the context of simplified stealth supersymmetry models with gluino and squark pair production. The observed data are consistent with the standard model predictions, and gluino (squark) masses of up to 2150 (1850) GeV are excluded at the 95% confidence level.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)Please spell out MSES, MoER, HIP, SFI, MOS, MES, NSC, PCTI, MST.; MSES and CSF
(Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER, ERC PUT and ERDF (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); LAS (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 (USA). Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contracts No. 675440, No. 724704, No. 752730, No. 758316, No. 765710, No. 824093, and COST Action No. 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 (IWTBelgium); the F. R. S.-FNRS and FWO (Belgium) under the “Excellence of Science—EOS“—be.h project n.
30820817; the Beijing 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 No. 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—ÚNKP, the NKFIH research Grants No. K 124845, No. K 124850, No. K 128713, No. K 128786, No. K 129058, No. K 131991, No. K 133046, No. K 138136, No. K 143460, No. K 143477, No. 2020-2.2.1-ED2021-00181, and No. TKP2021-NKTA-64 (Hungary); the Council of Science and Industrial Research, India; ICSC— National Research Center 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 No. Opus 2021/41/B/ST2/01369 and No. 2021/43/B/ST2/
01552 (Poland); the Fundação para a Ciência 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 Investigación Científica y T´ecnica de Excelencia María de Maeztu, Grant No. 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 B05F650021 (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, Contract C-1845; and the Weston Havens Foundation (USA)
Numerical investigation of the cooling zone of a container glass annealing furnace: Effect of the circulation fan speed on the cooling effectiveness of the furnace
No full textAnnealing, a crucial heat treatment process in the glass manufacturing industry, aims to alleviate the residual thermal stresses induced during the rapid cooling of glass following the forming stage. In the production of container glass, continuous annealing furnaces are employed for this process, consisting of distinct zones tailored to meet specific process requirements. The initial segment of the furnace, the upstream heating zone, is responsible for raising the glassware's temperature to the annealing point. After the heating zone, multiple cooling zones gradually lower the temperature of the glass objects under precise control. To enhance convective cooling rates and ensure uniform air temperatures within the furnace, circulation fans are typically installed in the cooling zones. This study focuses on numerically investigating the influence of circulation airflow rates on the cooling performance within an industrial scale continuous container glass annealing furnace. Two separate solvers are employed in an iterative approach. One solver addresses transient heat conduction within the glass bottles, utilizing radiative and convective heat fluxes as boundary conditions. The other solver is focused on solving the steady convection pattern inside the furnace. Results showed that increasing the circulation fan flow rate enhances the convective heat transfer inside the zone and increases the cooling rate of moving glass bottles. Moreover, increasing the fan flow rate also resulted in a more uniform cooling behavior in glass indicating reduction in the residual thermal stress levels
How do emotional availability, attachment, and parenting stress relate to attachment security? Findings from Turkish mother-toddler dyads
No full textMaternal characteristics mainly shape attachment security in early childhood and can impact toddler's emotional and social development. Although early determinants of attachment have been widely explored in the West, the studies in non-Western cultures are limited, especially in high-risk groups such as low-SES samples. Therefore, we examined the role of maternal parenting stress, attachment dimensions of anxiety and avoidance in romantic relationships and emotional availability in toddlers' attachment security. The Turkish mothers (N = 63; Mage = 30.17; SD = 4.87) filled out a pack of questionnaires including the Parenting Stress Index-Short Form (PSI-SF; Abidin, 1995) and Experiences in Close Relationships-Revised (ECR-R; Fraley et al., 2000) before video recorded home visits. The toddlers' (Mage = 22.96 months, SD = 7.09) attachment security was coded for Attachment Q-Sort (AQS; Waters, 1995) based on 2.5-h home-visit and 10-min free-play sessions were coded for Emotional Availability Scales (EAS; Biringen, 2008). The results showed that the mother's attachment avoidance and parenting stress were negatively associated with the child's attachment security, while the maternal sensitivity and structuring were positively associated with the child's attachment security. The mothers' behaviours on EAS did not mediate the relationship between maternal attachment dimensions and toddlers' attachment security. We showed that maternal attachment avoidance, parenting stress, lack of sensitivity and structuring behaviours could contribute to insecure attachment in Turkish toddlers. These identified factors warrant attention in the design and implementation of early intervention programs, particularly for mothers from low socio-economic status (SES) backgrounds in Turkey and in non-Western cultures characterised by similar cultural characteristics.TÜBİTA
Optimization of Ca/Si ratio in schists to enhance the pozzolanic supplementary cementitious material for OPC blending
No full textSupplementary cementitious materials (SCMs) are partial substitutes for ordinary Portland cement (OPC) to reduce cost, the production of carbon dioxide (CO2), and fossil fuel consumption. Recent studies illustrated the effectiveness of calcined kaolinite clay as a proper partial replacement for OPC. Hence, schist-type materials containing sufficient clay contents are regarded as promising candidates for OPC replacement. This study focuses on the possible use of activated calcium carbonates (CaCO3) to augment pozzolanic reactions of schists as a substitute for OPC. The use of activated calcium carbonates proved to be successful in expediting pozzolanic reactions and facilitating the formation of additional calcium aluminosilicate hydrate (C-A-S-H). In this study, the optimal strength performance for blended cement was achieved by adjusting the total carbonate content to 30 wt.% of the schist. The decision to introduce carbonate to the schist was guided by calculations determining the need for an excess of calcium ions to fully harness the potential for C-A-S-H formation. Virgin and augmented schists were activated by up to 80% of their respective potentials by heat treatment. Phase content and decomposition behavior of the active components were investigated by thermogravimetric analysis (TGA), x-ray diffraction (XRD), and scanning electron microscopy (SEM). Cement paste samples incorporating 30 wt.% replacement of OPC with activated schist SCMs were prepared. The phase distribution and compressive strengths of these samples were assessed at hydration intervals of 2, 7, 28, 50, and 90 days. Cement formulations with activated calcium-augmented SCMs exhibited compressive strength values at 109%, 101%, 96%, 95%, and 94% compared to pure cement paste at 2, 7, 28, 50, and 90 days, respectively. These values surpassed 90% of the compressive strength of pure OPC at equivalent hydration time points.
The advantages of utilizing activated carbonate additions as a surplus provider of calcium were elucidated in this study. The pozzolanic activity inherent in clays and minerals containing carbonate can be tailored through the de-hydroxylation of clay and the de-carbonation of calcite content. Special consideration needs to be given to ensuring the effective activation of schist-type materials, given the potential for substantial variations between the outcomes of laboratory-scale and industrial-scale activation processes for materials characterized by very low thermal conductivity, such as schists. imageAkcanSA Cement Manufacturing company ; Construction Engineering Research Laboratory (CERL) in Champaign, Illinois ; Engineer Research Development Corps (ERDC), through the Construction Engineering Research Laboratory (CERL) in Champaign, IllinoisPublisher versio
LEED v4.1 işletme ve bakımına dayalı konut binaları için sürdürülebilir iyileştirmeler.
No full textThe buildings and construction industry are responsible for almost 40% of energy- and process-related emissions. For this reason, the Paris Agreement announced that a 30% improvement in energy usage per sqm of buildings is needed until 2030 to reduce the high carbon emissions produced by buildings and the construction industry. Hence, the tendency in the architecture, engineering, and construction (AEC) industry is to reduce the resource consumption of buildings. At this point, there is a vital need to retrofit the existing buildings sustainably to fulfill the global climate targets described in the Paris Agreement. The research objective of this study is to (1) retrofit a five-story residential building based on the LEED v4.1 Operations and Maintenance (O+M) and (2) compare the resource consumption and carbon emission release of sustainable retrofitted buildings and conventional existing buildings. Based on the LEED v4.1 O+M, nine alternative scenarios are used in the study to reduce the building's current energy consumption and CO2 emissions. In this scope, energy, water, and lighting performance, as well as the carbon emission production rate of the building, are calculated via DesignBuilder for each scenario. The results reveal that each retrofitting method has a varied effect on lowering energy consumption and CO2 emissions in existing buildings. The combined scenario reduces the annual CO2 emission in the existing building from 34437.89 kg to 16668.9 kg, representing a 51% decrease in CO2 emissions. The findings of this study show that combining numerous retrofit methods can save up to 50% of energy in Tabriz-climate residential buildings. The results of this research will contribute to the AEC industry and literature by indicating the design process and value of sustainable retrofits for residential buildings based on LEED v4.1 Operations and Maintenance. Practitioners in sustainable construction projects and researchers focusing on green buildings could benefit from the results of this research.Binalar ve inşaat endüstrisi, enerji ve süreçle ilgili emisyonların yaklaşık 40\%'ından sorumludur. Bu nedenle, Paris Anlaşması, binaların ve inşaat endüstrisinin ürettiği yüksek karbon emisyonlarını azaltmak için 2030'a kadar metrekare başına bina başına enerji kullanımında 30\'luk bir iyileştirmenin gerektiğini açıklamıştır. Bu nedenle, mimarlık, mühendislik ve inşaat (MMİ) endüstrisinde eğilim, binaların kaynak tüketimini azaltmaktır. Bu noktada, Paris Anlaşması'nda tanımlanan küresel iklim hedeflerini karşılamak için mevcut binaları sürdürülebilir bir şekilde yeniden düzenleme konusunda hayati bir ihtiyaç bulunmaktadır. Bu çalışmanın araştırma hedefi, (1) LEED v4.1 İşletme ve Bakım (O+M) kriterlerine dayalı olarak beş katlı bir konut binasını iyileştirmek ve (2) sürdürülebilir bir şekilde iyileştirilmiş bina ile geleneksel mevcut binanın kaynak tüketimini ve karbon emisyon salımını karşılaştırmaktır. LEED v4.1 O+M temel alınarak çalışmada dokuz farklı senaryo kullanılarak binanın mevcut enerji tüketimini ve CO emisyonlarını azaltmak için çeşitli yöntemler incelenmiştir. Bu kapsamda, her senaryo için bina enerji, su ve aydınlatma performansı ile karbon emisyon üretim oranı DesignBuilder aracılığıyla hesaplanmıştır. Sonuçlar, her dönüştürme yönteminin mevcut binalardaki enerji tüketimini ve CO emisyonlarını azaltmada farklı bir etkisi olduğunu göstermektedir. Kombine senaryo, mevcut binanın yıllık CO emisyonunu 34437.89 kg'dan 16668.9 kg'a düşürerek CO emisyonlarında 51\%'lik bir azalmayı temsil etmektedir. Bu çalışmanın bulguları, Tabriz iklimindeki konut binalarında çeşitli dönüştürme yöntemlerini birleştirmenin enerji tasarrufu sağlayabileceğini göstermektedir. Bu araştırmanın sonuçları, LEED v4.1 Operasyon ve Bakım temel alınarak konut binaları için sürdürülebilir dönüşümlerin tasarım sürecini ve değerini göstererek MMİ endüstrisine ve literatürüne katkıda bulunacaktır. Sürdürülebilir inşaat projelerine odaklanan uygulayıcılar ve yeşil binalara odaklanan araştırmacılar, bu araştırmanın sonuçlarından faydalanabilirler
Examining disparities in energy poverty and indoor environmental quality satisfaction among canadian households
No full textThis study explores the relationship between income, dwelling quality, and indoor environmental quality (IEQ) perceptions. We conducted a survey of approximately 1100 Canadian residents from a variety of socioeconomic groups capturing a representative sample of Canadian society. It employs new thresholds to align the subjective perceptions of energy poverty with objective measures. Statistical analyses reveal notable differences in IEQ perceptions among income groups. While high-income respondents consistently express higher satisfaction levels across multiple IEQ domains than middle-income ones, the latter report higher satisfaction levels than those with lower incomes. Wealthier households typically have more rooms, with all income groups reporting a median of three bedrooms. Lower-income respondents tend to spend a larger proportion of their income on energy bills per capita, despite consuming less energy per capita. Around 41% of lower-income respondents report facing challenges in paying utility bills, compared to 24% and 16% in middle- and upper-income groups, respectively. We present energy poverty thresholds that are customized based on survey responses from the different income groups, informing policymakers to consider downward revisions of thresholds to address the subjective aspect of energy poverty better. The unequal IEQ and energy poverty perceptions we document across income groups highlight the need for targeted interventions to improve welfare among vulnerable households.TRI-Agency Institutional Program Secretariat ; Social Sciences & Humanities Research Council of Canada (SSHRC) ; Villum Fonde
Details in hand: How does gesturing relate to autobiographical memory?
No full textGestures are an integral and inseparable component of speech and people frequently use gestures when retelling their autobiographical memories. This study investigates whether gestures are associated with the retrieval of episodically and phenomenologically rich memories and how this association changes during development. Thirty-five children and 46 adults were asked to report autobiographical memories. Then, they rated the recalled memories on phenomenological qualities. Episodic and non-episodic details of autobiographical memories and representational gestures produced during memory narration were coded. The use of representational gestures was positively correlated with the episodic details of adult memories; however, the same correlation was not present in child memories. The representational gesture use was not associated with the phenomenological qualities in both groups. Gesture use may be related to the retrieval of autobiographical memories, particularly in adults capable of reporting long, coherent memories
İş yeri nezaketsizliğinin öncüllerini ve günlük sonuçlarını keşfetmek: Bir deneyim örnekleme çalışması.
No full textThis 5-day experience sampling study aims to investigate the antecedents and short-term consequences of workplace incivility (WPI) coming from two different sources: supervisors and co-workers. Using the victim precipitation and perpetrator predation framework as a conceptual basis, this study examined attachment orientation as a relatively stable individual difference antecedent of WPI experience/perception, and morning (before-work) negative affect as a situational individual difference antecedent of daily WPI. End-of-work burnout and job satisfaction were the outcome variables examined in the study. Finally, the moderating effects of attachment orientation on the WPI-burnout and WPI-job satisfaction within-person relationships were investigated. The sample consisted of 190 full-time employees from a wide range of occupations who interacted face-to-face with supervisors and co-workers on a daily basis. Participants completed before and end-of-work surveys during five consecutive days. Random coefficient modeling with a multilevel path analysis was conducted to test hypotheses. As expected, attachment anxiety was positively related to WPI experience at the between-person level whereas negative affect was positively related to WPI at the within-person level. Daily WPI predicted end-of-work burnout and job satisfaction. Attachment anxiety exacerbated the negative effects of supervisor incivility on both burnout and job satisfaction whereas attachment avoidance amplified the negative effects of supervisor incivility on burnout only. A number of exploratory analyses were also conducted. Findings highlight the importance of treating this seemingly minor deviant workplace mistreatment not only as a chronic phenomenon but also as an episodic one.Bu 5-günlük deneyim örnekleme çalışmasında, iki farklı kaynaktan gelen (iş arkadaşı ve yöneticiler) iş yeri nezaketsizliği (İYN) yaşantısının öncüllerinin ve kısa vadedeki sonuçlarının incelenmesi amaçlanmıştır. Kavramsal temel olarak fail predasyon ve mağdur odaklı suç çerçevelerinin kullanıldığı bu araştırmada, İYN algısının/deneyiminin bireysel bir öncülü olarak bağlanma yönelimi ve durumsal bir öncülü olarak mesai öncesi deneyimlenen olumsuz duygulanım incelenmiştir. İYN yaşantısının sonuçları olarak ise mesai sonrası tükenmişliği ve iş doyumu analiz edilmiştir. Son olarak, bağlanma yöneliminin İYN-tükenmişlik ve İYN-iş doyumu ilişkileri üzerindeki düzenleyici etkileri incelenmiştir. Araştırma örneklemini, gün içinde ofiste yöneticileri ve iş arkadaşlarıyla yüz yüze çalışan geniş bir yelpazedeki mesleklerden 190 çalışan oluşturmaktadır. Katılımcılar beş gün boyunca mesai öncesi ve sonrası anketlerini tamamlamışlardır. Hipotez testi için çok düzeyli yol analizi ile rastgele katsayı modellemesi gerçekleştirilmiştir. Beklendiği gibi, bağlanma kaygısı kişiler-arası düzeyde, mesai-öncesi olumsuz duygulanım da kişi-içi düzeyde İYN deneyimi ile pozitif ilişkilidir. Günlük İYN deneyiminin mesai sonrası tükenmişliği ve iş doyumunu yordadığı bulunmuştur. Bağlanma kaygısı, yönetici nezaketsizliğinin hem tükenmişlik hem de iş tatmini üzerindeki olumsuz etkisini şiddetlendirirken, bağlanma kaçınması yönetici nezaketsizliğinin yalnızca tükenmişlik üzerindeki olumsuz etkisini şiddetlendirmektedir. Bulgular, bu kötü muamele türünün yalnızca kronik bir olgu olarak değil, aynı zamanda epizodik bir olgu olarak da ele alınmasının önemini vurgulamaktadır