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DESIGNING AND EVALUATING A CONCEPTUAL FRAMEWORK FOR GENERATIVE ARTIFICIAL INTELLIGENCE-ASSISTED FEEDBACK: AN EXPERIMENTAL STUDY IN AN UNDERGRADUATE PROGRAMMINGCOURSE
No full textSearch for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at = 13 TeV
No full textA first search is presented for vector-like leptons (VLLs) exclusively decaying into a light long-lived pseudoscalar boson and a standard model τ lepton. The pseudoscalar boson is assumed to have a mass below the τ+τ− threshold, so that it decays exclusively into two photons. It is identified using the CMS muon system. The analysis is carried out using a data set of proton-proton collisions at a center-of-mass energy of 13 TeV collected by the CMS experiment in 2016–2018, corresponding to an integrated luminosity of 138 fb−1. Selected events contain at least one pseudoscalar boson decaying electromagnetically in the muon system and at least one hadronically decaying τ lepton. No significant excess of data events is observed compared to the background expectation. Upper limits are set at 95% confidence level on the vector-like lepton production cross section as a function of the VLL mass and the pseudoscalar boson mean proper decay length. The observed and expected exclusion ranges of the VLL mass extend up to 700 and 670 GeV, respectively, depending on the pseudoscalar boson lifetime
Maker'ı konuşmak: Baskın bilim dilini konuşmanın uzman olmayan bireylerin bilimsel ve teknolojik yatkınlıkları üzerindeki etkileri – Almanya'daki makerspace katılımcıları örneği üzerinden incelendi
No full textBu çalışma, dilin uzman olmayan bireylerin bilim ve teknoloji anlayışını ve katılımını nasıl etkilediğini incelemekte, bu deneyimleri araştırmak için makerspaceleri bir vaka olarak kullanmaktadır. Dilsel Görelilik temel alınarak yapılan araştırma, dilin bireylerin bilimsel kavramlara yaklaşımını nasıl şekillendirdiğini gözler önüne sermektedir. Bilimin baskın dili olan İngilizce, anadili İngilizce olan bireylere kavramları kendiliğinden anlamada avantaj sağlarken, anadili İngilizce olmayanlar ek zorluklarla karşılaşmakta ve bu durum anlayışlarını zorlaştırmaktadır. Dilin uzmanlar ve akademik çevreler üzerindeki etkisine dair çok sayıda çalışma mevcutken, uzman olmayan bireylerin deneyimlerine dair bir boşluk bulunmaktadır. Bu araştırma, etnografik gözlem, görüşmeler ve anketler kullanarak, dilin uzman olmayan bireylerin bilim ve teknoloji ile ilgili deneyimlerini nasıl etkilediğini, dil temelli avantajların veya engellerin formal eğitim olmaksızın ne ölçüde var olduğunu ve anadili İngilizce olmayan bireylerin makerspacelerde bu zorluklarla nasıl başa çıktığını incelemektedir. Elde edilen bulgular, dilin bilimsel bilgiye erişim ve bireysel düzeyde bu faaliyetlere katılım üzerindeki etkisini anlamamıza katkıda bulunmayı hedeflemektedir.This study explores how language impacts the understanding and engagement of non-experts in science and technology, with makerspaces serving as a case to examine these experiences. Rooted in the Sapir-Whorf Hypothesis, or linguistic relativity, the research looks at how language shapes the way individuals approach specialised scientific or technological concepts. English, as the dominant language in science, tends to give native speakers an intuitive grasp of technical terms, while non-native speakers often encounter additional challenges that can slow their understanding or even progress. Although a lot has been said about and numerous studies were conducted on how language affects professionals and academia, there is a noticeable gap in the literature when it comes to non-experts. Using ethnographic observation, interviews, and surveys, this research looks into how language influences non-experts’ experiences with science and technology, how far these language-based advantages or barriers extend without formal training, and how non-native speakers adapt to these challenges in makerspaces. The findings aim to shed light on how language affects access to scientific knowledge and engagement in individual settings and informal spaces like makerspaces. </p
Characterization of PCM melting behavior in a cavity including the effect of forced convection
No full textEnhancing heat transfer efficiency is crucial for improving the performance of systems designed for heat dissipation and thermal storage. Phase change materials (PCMs) offer favorable thermal characteristics but are hindered by inherently slow melting rates, a limitation this study seeks to address. This study introduces a novel approach that utilizes mechanical mixing to induce forced convection within a PCM-filled cavity. Experimental investigations were performed, where forced convection was introduced through liquid mixing at rotational speeds of 5, 25, and 100 rpm. For numerical studies, the enthalpy–porosity method, incorporating the Boussinesq approximation, is used. Experimental findings indicate that higher rotational speeds shorten the melting duration by up to 22 % (reducing it to 32 h) and increase the final liquid fraction by approximately 14 %, enabling complete melting compared with the non-rotating case. Moreover, mixing effectively reduced internal temperature gradients, lowering the maximum temperature from 68 °C to 45 °C and promoting a more uniform thermal distribution. At lower rotational speeds, the melting duration decreased by only about 10 %, with negligible impact on the final liquid fraction. The heat generation rate also strongly influenced melting performance. Experimental and validated numerical results, obtained with a Cmush value of 10⁶, showed acceptable agreement. Both approaches confirmed that at 40 W, 86 % of the PCM melted within 43 h, whereas at 20 W only 26 % melted in the same period. These findings establish mechanical mixing as a practical and effective strategy to overcome PCM’s slow melting limitation, thereby enhancing the applicability of PCMs in thermal management systems
Low-Temperature Au-In TLP Bonding for Compact Hermetic Packaging of Piezoelectric MEMS Devices
No full textTailoring the structural and optical properties of Mg-doped ZnO Thin films via sol-gel spin coating for ultraviolet optoelectronics
No full textThis study reports the characterization of undoped and Mg-doped zinc oxide (ZnO) thin films obtained using the sol-gel spin-coating method. Zn1-xMgxO films with x = 0, 0.01, 0.03, 0.05, and 0.07 were successfully deposited onto glass substrates. X-ray Diffraction analysis confirmed that films crystallized in the hexagonal wurtzite structure, with no secondary phases detected, indicating successful incorporation of Mg. Structural analysis revealed a systematic decrease in lattice parameters with increasing Mg content, consistent with the substitution of larger Zn ions by smaller Mg ions. Optical properties were investigated using absorption and photoluminescence spectroscopies. Absorption results demonstrated a significant blue-shift of the absorption edge with increasing Mg concentration, leading to a tunable optical bandgap that expanded from approximately 3.28 eV for undoped ZnO to 3.37 eV for the highest Mg doping (7%). Photoluminescence spectra exhibited near-band-edge ultraviolet emission, whose intensity was notably enhanced at optimal Mg doping levels, suggesting improved optical quality. These findings underscore the effectiveness of Mg doping via the sol-gel route in precisely tailoring thecharacteristics of ZnO thin films, making them candidates for optoelectronic applications
