cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
تاثیرات اقتصادی و ورزشی توسعه دیپلماسی ورزشی جمهوری اسلامی ایران
Publisher: name: دانشگاه کردستان
Year: 2022

description: هدف از این پژوهش بررسی پیامدهای اقتصادی و ورزشی توسعه دیپلماسی ورزشی جمهوری اسلامی ایران میباشد.این پژوهش از نظر هدف کاربردی و از روش پژوهش آمیخته(کمی-کیفی) بهره برده است. حجم نمونه در بخش کمی پژوهش 110نفر و در بخش کیفی 12 نفر از متخصصان حوزه دیپلماسی ورزشی و روابط بین الملل بوده است. ابزار پژوهش پرسشنامه محقق ساخته و مصاحبه نیمه ساختاریافته بوده که روایی و پایایی آنها مورد تایید متخصصان قرار گرفته است. نتایج پژوهش نشان میدهد در بعد ورزشی گویه (دیپلماسی ورزشی در شرایط ورزشکاران کشور در رویدادهای بین المللی ورزشی نقش دارد، با بار عاملی81/ 0)بیشترین بار عاملی را به خود اختصاص داده است و در بعد اقتصادی گویه (برگزاری رویدادهای ورزشی موجب تقویت زیرساخت ها و ایجاد تسهیلات مناسب میشود.، با بار عاملی96/ 0 )بیشترین بار عاملی را دارد. در نتیجه با استفاده از ظرفیت های توریستی و زیرساختی ورزشی کشور میتوان شرایط ورزش کشور را از طریق دیپلماسی ورزشی بهبود بخشید
APPA testing phase 1
Creators: name: McGeough, Julienne
name: Gallagher-Mitchell, Thomas
name: Clark, Dan
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: App
subject: Assessment
subject: Avatar
subject: Psychometric
subject: Smartphone
subject: Software
subject: Well-being

description: testing usability, reliability and validity on software assessment app
The role and regulation of folate metabolism during bacterial infection of Drosophila melanogaster
Creators: name: Grimes, Krista
Publisher: name: Imperial College London
Year: 2022

description: Immunity and metabolism are closely interlinked processes. Mounting an immune response is costly, and therefore metabolism is altered upon infection to provide the necessary energy and raw materials. In serious or prolonged infection, these immune-induced metabolic changes can be a driver of pathology. Drosophila melanogaster has been a widely used model for the study of interplay between immunity and metabolism. However, many of the signalling mechanisms linking immune detection with metabolic regulation, and their specific consequences for infection course and outcome, remain to be explored. In this work, I used Targeted DamID to generate a transcriptional profile of the fat body during infection. The fat body is the predominant site of energy storage and intermediary metabolism but also coordinates humoral immunity, and is thus a critical tissue for immune-metabolic interaction in Drosophila. I determined that the fly responds to many bacteria by altering expression of genes of the folate cycle and associated enzymes of amino acid metabolism. These transcriptional changes occur in a manner that would increase flow of carbon from glycolysis into serine and glycine synthesis and increase folate cycle flux through the mitochondrion. I determined that the two most highly induced enzymes, astray and Nmdmc, are repressed in healthy flies by the transcription factor MEF2. This repression is overcome upon infection by the coordinated action of major immune and metabolic transcription factors Dif and FOXO. The transcriptional regulation of these serine-folate metabolic unit enzymes has functional consequence for immunity, as knockdowns and mutants present altered resistance and tolerance phenotypes, in a pathogen-specific manner. This work has thus uncovered the immune-induced signalling that regulates a novel metabolic unit of functional importance during infection.
Understanding redshift space distortions in density-weighted peculiar velocity
Creators: name: Sugiyama, Naonori S.
name: Okumura, Teppei
name: Spergel, David N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations of the kinetic Sunyaev-Zel'dovich (kSZ) effect measure the density-weighted velocity field, a potentially powerful cosmological probe. This paper presents an analytical method to predict the power spectrum and two-point correlation function of the density-weighted velocity in redshift space, the direct observables in kSZ surveys. We show a simple relation between the density power spectrum and the density-weighted velocity power spectrum that holds for both dark matter and halos. Using this relation, we can then extend familiar perturbation expansion techniques to the kSZ power spectrum. One of the most important features of density-weighted velocity statistics in redshift space is the change in sign of the cross-correlation between the density and density-weighted velocity at mildly small scales due to nonlinear redshift space distortions. Our model can explain this characteristic feature without any free parameters. As a result, our results can precisely predict the non-linear behavior of the density-weighted velocity field in redshift space up to $\sim30\ h^{-1} {\rm Mpc}$ for dark matter particles at the redshifts of $z=0.0$, $0.5$, and $1.0$.
description: 21 pages, 11 figures
MS Gr. class. c. 6 1516
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 37. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Quantum correlations: a window into fundamental physics
Creators: name: Chevalier, Hadrien
Publisher: name: Imperial College London
Year: 2022

description: The past century has seen many of nature's secrets unravelled by the immensely successful theories of particle physics and general relativity, frameworks in which the world is described as a collection of many quantum fields, lying on a background classical spacetime. High-energy signals, originating naturally from the cosmos, or artificially from particle accelerators, held many empirical clues in support of these descriptions. In recent years, the formidable advances in quantum control have brought to light a model-agnostic conception of physics, once thought to be merely philosophical, as an alternative path of fundamental investigations. This modern information theoretic framework, eschews any description of nature beyond the correlations between measurements predicted by quantum theory. In this thesis, three questions of fundamental physics are studied from the perspective of quantum information and quantum control.
بررسی تأثیر مسئولیت اجتماعی بر وفاداری مشتریان باشگاه های آمادگی جسمانی با نقش میانجی تصویر و شهرت
Publisher: name: دانشگاه کردستان
Year: 2022

description: هدف پژوهش حاضر، بررسی تأثیر مسئولیت اجتماعی(بر اساس ابعاد جدید و ویژه ورزش) بر وفاداری مشتریان با نقش میانجی تصویر و شهرت در باشگاه های آمادگی جسمانی (ایروبیک، بدنسازی و آمادگی جسمانی) شهر رشت بود. روش پژوهش حاضر توصیفی-همبستگی و از نوع پیمایشی بود که به شکل میدانی انجام شد. نمونه پژوهش، 409 نفر مشتریان بودند که با \n روش نمونه گیری تصادفی انتخاب شدند. تجزیه وتحلیل داده های پرسشنامه های جمع آوری شده با مدلسازی معادلات ساختاری با نرم افزار (ایموس 24 و اس پی اس اس24 )انجام شد. یافته ها نشان داد مسئولیت اجتماعی باشگاه با مؤلفه های جدید در حوزه ورزش درحالیکه بیشترین تأثیر را بر تصویر داشته، بر شهرت و وفاداری نیز تأثیرگذار است. همچنین تصویر به عنوان متغیر مستقل بر شهرت و وفاداری تأثیر دارد. هرچند در مدل نهایی شهرت بر وفاداری تأثیر معنی داری ندارد؛ اما رابطه مثبت معنی دار و تأثیرگذاری بین متغیرهای تحقیق در مدل نهایی بسیار مشهود است. به طورکلی، مدیران باشگاه ها میتوانند با مدنظر قرار دادن ابعاد مسئولیت اجتماعی در قبال مشتریان به عنوان یک استراتژی اثرگذار و درنتیجه کسب تصویر و شهرت خوب، باعث جذب مشتریان بالقوه و حفظ مشتریان وفادار شوند که این امر، لازمه بقا و مزیت رقابتی این باشگاه هاست
Improving Inpatient Glycemic Control: Utilization of Daily Pharmacist Monitoring and Intervention
Creators: name: Bibby, Joel
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: As a directive of the Hospital Engagement Network 2.0 and in order to improve patient care, CHS NorthEast undertook project to improve glycemic control, specifically to reduce overall incidence of hypoglycemia and hyperglycemia. The primary overall goal was reduction of incidence of hyperglycemia via utilization of pharmacist or pharmacy extender chart review. In addition to this, incidence of hypoglycemia was also tracked to ensure the percent of patients experiencing hypoglycemia remained low. The project took place in three main phases, the baseline data collection and proposal phase, the student TheraDoc intervention phase, and the interdisciplinary rounds phase. Over the course of one year, glycemic control was improved in the targeted units within the hospital. The student phase showed modest improvements, while the interdisciplinary rounds phase demonstrated a more dramatic improvement.
Vitamin B12 Protects Against Hypoxia/ Reperfusion Injury in Mouse Proximal Tubule Cells
Creators: name: Ayesha, Azraa
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: Acute kidney injury (AKI) is a common syndrome characterized by a sudden decline in kidney function that can potentially lead to death. Ischemia/reperfusion injury (IRI) is the leading cause of AKI and is inevitable during kidney transplants. There is no effective treatment available to treat IRI. Pathways involved in IRI are evidenced to lead to reactive oxygen species (ROS), inflammation, fibrosis, apoptosis, DNA damage response (DDR) and autophagy. Vitamin B12 (B12) or cobalamin, is essential for the human body and is pharmacologically known to scavenge ROS, suppressing inflammation and reverse impaired autophagy that occurs in B12 deficient conditions. To test whether B12 has beneficial effects in IRI, I subjected cultured mouse proximal tubule cells (BU.MPT) to a hypoxia/reperfusion (H/R) procedure and measured transcription of markers for inflammation (Mcp1, Il6, Nos2) and fibrosis (fibronectin), protein markers for apoptosis(Tgf1, c-cap3), and DDR (p.H2AX) induced by hypoxia/reperfusion (H/R). Presence of B12 during the H/R procedure at 0.3µM dramatically inhibited the upregulation of these markers studied and to an increased cell survival. Together, my findings suggest that B12 is a highly promising molecule to prevent/treat AKI.
MS Gr. class. c. 6 1517
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 38. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Organic electrochemical transistors with PVA hydrogels/PEDOT:PSS channel
Creators: name: Brug, Julia
Publisher: name: Imperial College London
Year: 2023

description: Most organic electrochemical transistor (OECT)-based biosensors currently rely solely on the generation of electronic signals upon sensor-analyte interaction which has limited the range of analytes to those with distinct electronic properties or those that rely on specific biological materials with poor environmental stability, such as redox enzymes and antibodies. The development of durable stimuli-responsive hydrogels, which exhibit changes in ionic conductivity upon interacting with specific analytes, has significantly expanded the potential for ionic-based sensing as an alternative to electronic-based sensing. Although OECTs are suitable for measuring ionic signals, there have been only a few instances where these materials have been utilized within an OECT platform. This study investigates the applicability of OECTs for ionic-based sensing using poly(vinyl alcohol) (PVA) hydrogels and PEDOT:PSS based OECTs. Through varying macromer percentage alone, a set of hydrogels was fabricated that mimics the network properties seen in complex analyte-responsive systems. These hydrogels offer a cheap alternative, without the use of biorecognition elements, for probing OECT sensitivity to ionic signals. A system based on four electrode impedance spectroscopy was also developed to independently measure their ionic conductivity, with preliminary results consistent with values reported in literature. To enhance device reproducibility and improve compatibility with hydrogel deposition, a novel OECT geometry was designed. This involved incorporating larger features such as wider channels and thicker electrode contacts to minimize fabrication artifacts which ultimately improved OECT transconductance. Additionally, the impact of 3 direct polymerization of hydrogels on PEDOT:PSS was explored using Raman spectroscopy. The findings revealed that a high degree of adherence between the hydrogel and PEDOT:PSS may significantly reduce the dedoping capacity of PEDOT:PSS. Overall, this work represents a valuable first step in exploring the suitability of OECTs to ionic flow based sensing using hydrogels.
On the "force-free surface " of the magnetized celestial bodies
Creators: name: Epp, V.
name: Masterova, M. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: 85Axx

description: The field of a uniformly magnetized rotating sphere is studied with special attention to the surface where the electric and magnetic fields are orthogonal to each other. The equation of this surface, valid at arbitrary distances from the rotating magnetized sphere, is obtained. Inside the light cylinder this surface can be considered as a force-free surface, i.e. as a place where the particles with strong radiation damping can be trapped due to their energy loss. Outside the light cylinder this surface makes just a geometric locus which moves with a superlight velocity around the axis of rotation. The 2- and 3-dimensional plots of the force-free surface are constructed. Estimation of influence of the centrifugal force on the particle dynamics is made. It is shown, that in case of strong magnetic field the centrifugal force is negligible small everywhere except a narrow neighbourhood of the light cylinder.
description: 8 pages, 11 figures
Elaphoglossum cruzense M. Kessler & Mickel, Brittonia
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum cruzense

description: Elaphoglossum cruzense M.Kessler & Mickel, Brittonia 58(2): 101. 2006. (Fig. 3A–D)
 Range: —Endemic to Bolivia (SC).
 Ecology: —Locally fairly common; terrestrial and saxicolous, less commonly epiphytic, in semihumid forests on sandstone; 450–1200 m.
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
تأثیر عوامل زیبایی شناختی و کیفیت خدمات بر ارزش ادراک شده وفاداری و رضایت مشتریان (مطالعه موردی استخرهای استان کرمانشاه)
Publisher: name: دانشگاه کردستان
Year: 2022

description: هدف پژوهش حاضر، تأثیر عوامل زیبایی شناختی و کیفیت خدمات بر ارزش ادراک شده، وفاداری و رضایت مشتریان استخرهای استان کرمانشاه بود. روش تحقیق به لحاظ ماهیت، توصیفی- همبستگی است. جامعه آماری تحقیق را مشتریان استخرهای استان کرمانشاه تشکیل میدادند که با استفاده از روش نمونه گیری تصادفی ساده انتخاب شدند. پس از توزیع پرسشنامه ها درنهایت 274 پرسشنامه عودت گردید. جهت گردآوری داده ها از پرسشنامه های زیبایی شناختی سلیمانی(1391 )،کیفیت خدمات لیو(2008 )،ارزش ادراک شده کیم و همکاران (2009 )،وفاداری لیم (2006 )،رضایت مشتری ویکتور (2002 )استفاده گردید که روایی آنها توسط استاد راهنما و صاحب نظران دانشگاهی مورد تأیید قرار گرفت و همچنین پایایی آنها نیز از طریق آزمون ضریب آلفای کرونباخ مورد تأیید قرار گرفت. به منظور تحلیل داده ها از تکنیک معادلات ساختاری با استفاده از نرم افزار آماری ایموس و نیز نرم افزار آماری اس.پی.اس.اس استفاده شد. یافته های تحقیق نشان داد زیباشناختی بر ارزش ادراک شده و وفاداری مشتریان تأثیر معنادار دارد، همچنین اثر مستقیم کیفیت خدمات بر وفاداری، کیفیت خدمات بر ارزش ادراک شده، ارزش ادراک شده بر رضایت مشتریان و رضایت مشتری بر وفاداری مثبت و معنادار بود. مدیران و برنامه ریزان استخرها با ارتقاء کیفیت خدمات و ارائه خدمات جانبی به مشتریان میتوانند وفاداری آنها را حفظ و ارتقاء دهند
Wittgenstein is a Buddha: A comparison between Zen Buddhist and Wittgenstein's Epistemology
Creators: name: Liu, Zhangsinong
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: Zen Buddhism has long been an elusive and overlooked subject in the realm of Western Philosophy. The main reason is that most original Zen texts are written in Ancient Chinese and Zen researchers in China are mostly not philosophy professionals who have gone through training in the system of Western Philosophy. So most of the texts explaining Zen Buddhism are not written in an analytical style. Also, there is a lack of Western epistemologists who are interested in Zen Buddhism. Most of the Western researchers in Zen are those who focus on the religious aspects. The purpose of this thesis is to provide some initial thoughts on how to explain Zen Buddhist epistemology in the context of Western epistemology, especially Wittgenstein’s epistemology. I come to find that there are many similarities between Zen and Wittgenstein’s texts and Wittgenstein’s explanation can open a door for people who are trying to understand Zen Buddhism.
MS Gr. class. c. 6 1518
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 39. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
REPA : REsearch Performance Analyzer
Creators: name: Jebari, Chaker
Publisher: name: Zenodo
Year: 2023

description: Due to the exponential increase in number of publications, researchers and journals, many bibliometric tools have been developed to evaluate research performance. Each of which has its own purpose and none of them has a sophisticated module to view, analyze, and compare scientists between them. In this paper, we propose a new bibliometric tool called REPA (REsearch Performance Analyzer) that uses different bibliometric and scientometrics indicators to view, analyze, and compare scientists. Our tool helps research institutes in hiring and promoting the most convenient scientists for their research projects. Moreover, it can help scientists in finding other researchers to share research ideas and establish collaborations.
رابطه اوقات فراغت جدی و رضایت از فراغت با میانجی گری مشارکت تفریحی در ورزشکاران آماتور والیبال
Publisher: name: دانشگاه کردستان
Year: 2022

description: گذران فراغت تحت تأثیر تحولات اقتصادی- اجتماعی، از دغدغه های افراد است. هدف تحقیق چگونگی تأثیر فراغت جدی بر رضایت از فعالیت فراغتی با میانجی گری مشارکت تفریحی ورزشکاران آماتور والیبال بود. روش تحقیق از منظر هدف، کاربردی و از حیث گردآوری داده ها همبستگی بود که به صورت میدانی انجام شد. ابزار جمع آوری داده ها پرسشنامه بود. جامعه آماری، ورزشکاران غیرحرفه ای خانه والیبال تهران که حداقل 6 ماه سابقه عضویت در این مجموعه را داشتند، بود. جهت تعیین حجم نمونه از نرم افزار اس.پی.اس.اس.استفاده شد که 274 پرسشنامه مورد استفاده قرار گرفت. به منظورتجزیه وتحلیل داده ها از آمار توصیفی و استنباطی (نرم افزار اس.پی.اس.اس نسخه 26 و پی.ال.اس نسخه 3 )استفاده شد. یافته ها نشان داد یکی از عوامل مهم برای افزایش رضایت افراد از فعالیت فراغتی، مشارکت تفریحی است. بین ابعاد مشارکت تفریحی جاذبه بیشترین تأثیر را دارد، بنابراین هرچه افراد نسبت به یک فعالیت تحریک پذیری بیشتری داشته باشند، رضایتشان بیشتر است. مشارکت تفریحی 49 درصد و اوقات فراغت جدی 42 درصد از تغییرات رضایت از فراغت را پیشبینی میکنند و 66 درصد از تغییرات مشارکت تفریحی، وابسته به اوقات فراغت جدی والیبالیست ها است. در نظر گرفتن مشارکت تفریحی میتواند کمک زیادی به مسئولین حیطه فراغت برای جذب و رضایت بیشتر مشتریان خانه والیبال تهران کند
Elaphoglossum dolichopus Mickel, Brittonia
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum dolichopus

description: Elaphoglossum dolichopus Mickel, Brittonia 39(3): 317. 1987. (Fig. 22A–C)
 Range: —Venezuelan tepuis; Andes of Venezuela and Colombia; Bolivia (LP).
 Ecology: —Rare; epiphytic in humid forests; 700–1550 m.
 Notes: —The conspecificity of the two Bolivian specimens with the material from northern South America is uncertain.
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
MS Gr. class. c. 6 1519
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 40. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
نقش ویژگی های استادیوم بر تجربۀ خدمت تماشاگران فوتبال (مورد مطالعه: استادیوم آزادی)
Publisher: name: دانشگاه کردستان
Year: 2022

description: هدف پژوهش حاضر بررسی تأثیر ویژگی های استادیوم بر تجربۀ خدمت تماشاگران در استادیوم فوتبال آزادی بود. پژوهش حاضر از نظر هدف کاربردی و از نظر شیوۀ گردآوری اطلاعات تحقیق توصیفی از نوع همبستگی بود که به صورت پیمایشی به اجرا در آمد. جامعۀ آماری پژوهش شامل تماشاگران حاضر در استادیوم آزادی بود. تعداد 165 پرسشنامۀ قابل تحلیل به مرحلۀ تجزیه وتحلیل پژوهش راه یافتند. نتایج تحقیق نشان داد راحتی صندلی ها، زیبایی استادیوم، تمیزی استادیوم و طراحی استادیوم بر تجربۀ خدمت تماشاگران تأثیر مثبت و معنی داری دارند. اما تأثیر پارکینگ استادیوم، دسترسی استادیوم و خدمات غذایی استادیوم بر تجربۀ خدمت تماشاگران معنی دار نشد. تحقیق حاضر در راستای کمک به درک بیشتر در این زمینه انجام شد و نتایج آن نشان داد که از میان ویژگی های استادیوم، ۴ عامل راحتی صندلی ها، طراحی استادیوم، تمیزی استادیوم و زیبایی استادیوم تأثیر قابل توجهی بر تجربۀ خدمت تماشاگران لیگ برتر فوتبال ایران دارند. ازاین رو، مدیران فوتبال ایران و مدیران استادیوم میتوانند با در نظر گرفتن این نتایج و نیز نتایج سایر تحقیقاتی که در این زمینه به آن اشاره شد، به ارتقای تجربۀ خدمت تماشاگران در لیگ برتر فوتبال ایران اقدام نموده و از مزایای آن بهره مند گردند
Impact of dust cooling on direct collapse black hole formation
Creators: name: Latif, M. A.
name: Omukai, K.
name: Habouzit, M.
name: Schleicher, D. R. G.
name: Volonteri, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Observations of quasars at $ z > 6$ suggest the presence of black holes with a few times $\rm 10^9 ~M_{\odot}$. Numerous models have been proposed to explain their existence including the direct collapse which provides massive seeds of $\rm 10^5~M_{\odot}$. The isothermal direct collapse requires a strong Lyman-Werner flux to quench $\rm H_2$ formation in massive primordial halos. In this study, we explore the impact of trace amounts of metals and dust enrichment. We perform three dimensional cosmological simulations for two halos of $\rm > 10^7~M_{\odot}$ with $\rm Z/Z_{\odot}= 10^{-4}-10^{-6}$ illuminated by an intense Lyman Werner flux of $\rm J_{21}=10^5$. Our results show that initially the collapse proceeds isothermally with $\rm T \sim 8000$ K but dust cooling becomes effective at densities of $\rm 10^{8}-10^{12} ~cm^{-3}$ and brings the gas temperature down to a few 100-1000 K for $\rm Z/Z_{\odot} \geq 10^{-6}$. No gravitationally bound clumps are found in $\rm Z/Z_{\odot} \leq 10^{-5}$ cases by the end of our simulations in contrast to the case with $\rm Z/Z_{\odot} = 10^{-4}$. Large inflow rates of $\rm \geq 0.1~M_{\odot}/yr$ are observed for $\rm Z/Z_{\odot} \leq 10^{-5}$ similar to a zero-metallicity case while for $\rm Z/Z_{\odot} = 10^{-4}$ the inflow rate starts to decline earlier due to the dust cooling and fragmentation. For given large inflow rates a central star of $\rm \sim 10^4~M_{\odot}$ may form for $\rm Z/Z_{\odot} \leq 10^{-5}$.
description: Accepted for publication in ApJ, comments are still welcome
Status of Searches for Magnetic Monopoles
Creators: name: Patrizii, L.
name: Spurio, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The searches for magnetic monopoles (Ms) is a fascinating interdisciplinary field with implications in fundamental theories, in particle physics, astrophysics, and cosmology. The quantum theory of Ms and its consistency with electrodynamics was derived by Dirac. This marked the start of the searches for classical monopoles at every new accelerator, up to the LHC. Magnetic monopoles are required by Grand Unification Theories, but unlike classical monopoles they would be incredibly massive, out of the reach of any conceivable accelerator. Large efforts have been made to search for them in the cosmic radiation as relic particles from the early Universe in the widest range of mass and velocity experimentally accessible. In this paper the status of the searches for classical Ms at accelerators, for GUT, superheavy Ms in the penetrating cosmic radiation and for Intermediate Mass Ms at high altitudes is discussed, with emphasis on the most recent results and future perspectives.
description: 8 Figures, 1 Table. To appear in Annual Review of Nuclear and Particle Science, Volume 65 (2015). Review dedicated to the memory of Giorgio Giacomelli, who devoted much of his scientific activity to the study of magnetic monopoles
Solar Cell Characterization
Creators: name: Shin, Kai
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: Recent decades have witnessed a growing shift away from fossil fuels as their harmful effects and dwindling supply have become more acute. As attention has turned towards alternative energy sources, solar energy has shown promise as a potentially complete solution. Sunlight can be captured and converted directly into usable electrical power via photovoltaic devices as well as create liquid, combustible Hydrogen fuel from water through a process called hydrolysis. Understandably, a massive amount of research is being done on developing efficient devices for economic application as soon as possible. The University of Chapel Hill serves as an Energy Frontier Research Center where researchers are developing a number of different solar devices. These range from Dye Sensitized Photoelectrosynthesis Cells (DSPEC's), which require a liquid electrolyte that may one day be used to captured sunlight to create Hydrogen fuel, to graphene/GeSi quantum dot dry cells. Accommodating the large number being produced requires a method for efficient characterization of the devices. Cells are typically characterized through a number of different tests, which are currently done one at a time at several different locations resulting in an inefficient, time consuming process. This thesis focuses on addressing this pain point through the development of a multi-path characterization device that can perform several different tests automatically without continuous manual input by the researcher. Referred to as the Solar Automated Multi-Meter (SAMM), the resulting apparatus supports three formats of photoactive cells: cells that require liquid electrolyte, and two formats of dry cells, one in which the anodic and cathodic contacts lie on the same side of the cell and one in which the contacts are on opposing sides. Programmed using National Instrument's LabVIEW, the SAMM can perform three distinct types of measurement at multiple locations on each cell: I-V curve generation, EIS, and IPCE measurement.
Code for "Bipotent transitional liver progenitor cells contribute to liver regeneration"
Creators: name: Zhu, Huan
Publisher: name: Zenodo
Year: 2023

description: Following severe liver injury, when hepatocyte-mediated regeneration is impaired, biliary epithelial cells (BECs) can transdifferentiate into functional hepatocytes. However, the subset of BECs with such facultative tissue stem cell potential, as well as the mechanisms enabling transdifferentiation, remain elusive. Here we identify a transitional liver progenitor cell (TLPC), which originates from BECs and differentiates into hepatocytes during regeneration from severe liver injury. By applying a dual genetic lineage tracing approach, we specifically labeled TLPCs and found that they are bipotent, as they either differentiate into hepatocytes or re-adopt BEC fate. Mechanistically, Notch and WNTWnt/β-catenin signaling orchestrate BEC-to-TLPC and TLPC-to-hepatocyte conversions, respectively. Together, our study provides functional and mechanistic insights into transdifferentiation-assisted liver regeneration.
Elaphoglossum elegantipes Mickel, Fieldiana, Bot.
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum elegantipes

description: Elaphoglossum elegantipes Mickel, Fieldiana, Bot., n.s., 27: 131. 1991. (Fig. 14A–H)
 Range: —Northern Peru to Bolivia (CO).
 Ecology: —Uncommon; epiphytic in humid forests; 300–2950 m.
 Notes: —A species lacking distinctive characters. The Bolivian specimens differ from the Peruvian ones in their moderately long-creeping (vs. very short-creeping) rhizomes and may represent a different species.
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
Investigating aryl-sulphonamides as dual inhibitors of splicing and metabolism for the potential treatment of neuroblastoma
Creators: name: Herendi, Lili
Publisher: name: Imperial College London
Year: 2022

description: Neuroblastoma is one of the most common paediatric solid tumours with a poor prognosis for high-risk patients, highlighting the need for novel therapies. In this study, I analysed public drug sensitivity data and identified indisulam as a potent neuroblastoma inhibitor that selectively targets the RNA splicing factor RBM39. To investigate the molecular mechanism of indisulam, I utilized a range of analytical and biological techniques, including LC-MS and GC-MS profiling, stable isotope tracing, RNA interference, cell respiratory and energetic assays and CRISPR-Cas9 gene editing. I found that indisulam initiates the proteasomal degradation of RBM39 via DCAF15-E3 ubiquitin ligase, resulting in subsequent mis-splicing events and metabolic alterations in neuroblastoma cells. I characterized the metabolic response of DCAF15 knockout lines and identified potential contributory effects to indisulam toxicity and concluded that the main determinant of metabolic effects in neuroblastoma is RBM39 degradation, similar to colorectal and lymphoid cancers. Furthermore, I investigated the efficacy of indisulam in neuroblastoma cell models and correlated the expression of DCAF15 with reduced cell viability. I determined the molecular targets of RBM39 proteasomal degradation responsible for metabolic alterations in neuroblastoma and identified consistent effects of indisulam on metabolism, including to glutamine utilization which can contribute to toxicity independently of RBM39 degradation. I also found that MYCN expression sensitizes neuroblastoma to indisulam treatment which should be considered in therapy. In conclusion, the findings of this work suggest that dual inhibition of RNA splicing and metabolism by indisulam is a promising therapeutic approach for the treatment of high-risk neuroblastoma and the analytical techniques employed in this study provide important insights into the molecular mechanisms underlying this approach.
تاثیر وفاداری به تیم ملی بر میزان ریسک پذیری گردشگران ایرانی نسبت به میزبان جام ملتهای آسیا (2019 امارات)
Publisher: name: دانشگاه کردستان
Year: 2022

description: پژوهش حاضر از نوع توصیفی – پیمایشی و از نظر هدف کاربردی است. جامعه آماری این پژوهش، هواداران تیم ملی ایران در بازی های جام ملتهای آسیا 2019 بودند ابزار جمع آوری اطلاعات در این پژوهش، پرسشنامه وفاداری (2012 (Hadavi & Elahi, Mousavi ،پرسشنامه نوع ریسک سفر درک احساس پرسشنامه و Floyd, Gibson, Pennington-Gray & Thapa (2004) ریسک مقصد (1998 (Graefe & Sönmez بود که حین برگزاری بازی استقلال تهران – صنعت نفت آبادان )16 آذر 1397 )از سری مسابقات لیگ برتر، هفته چهاردهم و بازی پرسپولیس – پارس جنوبی جم )23 آذر 1397 )از سری مسابقات لیگ برتر، هفته پانزدهم پخش شد که تعداد 380 پرسشنامه قابل استفاده بود. برای تحلیل داده های به دست آمده از روشهای آمار توصیفی و استنباطی )آزمون رگرسیون ساده( و با بهرهگیری از نرمافزار اس.پس.اس.اس استفاده شد. با توجه به یافته های پژوهش حاضر مؤلفه های مؤثر بر احساس درک ریسک از مقصد در پژوهش حاضر یعنی نوع ریسک سفر، تجربه سفرهای قبلی به سایر نقاط دنیا، تجربه سفر به کشور میزبان بازی های جام ملتهای آسیا بر احساس درک ریسک از مقصد گردشگر ایرانی تأثیر معنادار داشت. نتایج حاکی از آن است که برگزارکنندگان بازهای جام ملتهای آسیا توانسته اند مدیریت ریسک مناسبی برای گردشگران بین- المللی از نظر ایجاد اطمینان خاطر و عدم احساس ریسک نسبت به کشور میزبان و رویداد ورزشی فراهم آورند
MS Gr. class. c. 6 1520
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 41. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Direct, nonlinear inversion algorithm for hyperbolic problems via projection-based model reduction
Creators: name: Druskin, Vladimir
name: Mamonov, Alexander
name: Thaler, Andrew E.
name: Zaslavsky, Mikhail
Publisher: name: arXiv
Year: 2015
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 86A22, 35R30, 41A05, 65N21

description: We estimate the wave speed in the acoustic wave equation from boundary measurements by constructing a reduced-order model (ROM) matching discrete time-domain data. The state-variable representation of the ROM can be equivalently viewed as a Galerkin projection onto the Krylov subspace spanned by the snapshots of the time-domain solution. The success of our algorithm hinges on the data-driven Gram--Schmidt orthogonalization of the snapshots that suppresses multiple reflections and can be viewed as a discrete form of the Marchenko--Gel'fand--Levitan--Krein algorithm. In particular, the orthogonalized snapshots are localized functions, the (squared) norms of which are essentially weighted averages of the wave speed. The centers of mass of the squared orthogonalized snapshots provide us with the grid on which we reconstruct the velocity. This grid is weakly dependent on the wave speed in traveltime coordinates, so the grid points may be approximated by the centers of mass of the analogous set of squared orthogonalized snapshots generated by a known reference velocity. We present results of inversion experiments for one- and two-dimensional synthetic models.
description: 54 pages, 6 figures fixed typos and small errors expanded several sections to aid in understanding
Layered double hydroxide-derived oxygen carriers for chemical looping processes
Creators: name: High, Michael
Publisher: name: Imperial College London
Year: 2023

description: In chemical looping combustion, the combustion reaction is split into two sub-reactions linked by metal oxide oxygen carriers to transfer oxygen from the air to the fuel. The oxygen carriers play a crucial role in chemical looping processes and must maintain high performance during extended redox cycling at high temperatures. The preparation of mixed metal oxides (MMOs) via the calcination of layered double hydroxide (LDH) precursors has been shown to achieve a high degree of dispersion of active metal oxide within the support due to the high degree of mixing of metals in the LDH structure. In this thesis, CuO-based oxygen carriers derived from LDHs for chemical looping processes were evaluated. Novel CuO-based oxygen carriers supported on Al2O3 and MgAl2O4 were developed by tuning the synthetic chemistry of the LDHs prepared via co-precipitation at constant pH. The choice of co-precipitating agent was found to significantly affect the morphology of the LDHs and the dispersion of active CuO in the aluminate support phase in the MMOs. The oxygen carriers supported on MgAl2O4 showed much higher rates of oxygen release and re-oxidation and higher chemical stability than those supported on Al2O3. The co-precipitation pH was determined to be an important parameter for tuning the mechanical properties of the MMOs. An increase in co-precipitation pH from 9.5 to 11 was found to decrease the porosity and increase the crushing strength of the MMOs. The higher-strength MMOs demonstrated near-constant conversion over extended redox cycling in a fluidised bed reactor. For design, accurate knowledge of the intrinsic kinetics of the oxygen release reaction of the oxygen carriers is needed to scale up chemical looping reactors. The oxygen release kinetics were determined using an adapted effectiveness factor-based kinetic model. An activation energy of 51 ± 3 kJ mol−1 was calculated using an Arrhenius expression, which agreed well with values reported in the literature. The formation mechanism of the Cu-Mg-Al LDHs was investigated by varying the co-precipitation pH value. The diameter and height of the LDH platelets and porosity of the bulk material were observed to generally decrease with increasing pH, except for LDHs synthesised at pH 10. The large LDH platelet diameters synthesised at pH 10 were attributed to an interplay of supersaturation, thermodynamic and electrostatic factors. The more porous MMOs synthesised at pH 9, 9.5 and 10 showed much higher rates of oxygen release than the less porous materials synthesised at pH 10.5, 11 and 11.5. In this thesis, the LDH-MMO design strategy was shown to be effective for the development of CuO-based oxygen carriers with extremely high chemical stability and tuneable mechanical properties. The structural diversity of LDHs enables versatile combinations of metal ions to be highly dispersed in their structure, which could inspire the development of highly stable oxygen carriers for many emerging chemical looping processes.
Arab American Identity and Ethnic Name Bias
Creators: name: Rahal, Danny
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Despite being included in the majority racial group, Arabs still experience discrimination in
America. One form of discrimination experienced by Arab Americans from employers is ethnic
name discrimination. However, little research has examined Arab identity and whether Arab
Americans display ethnic name biases similar to those of White adults. Therefore, this study
aims to test whether Arab Americans show biases regarding ethnic names similar to those shown
by White Americans, and to test relationships between ethnic identity and ethnic-name bias. In
the current study, 133 Arabs and 247 Whites rated how successful they believed 11 students
would be based solely on their high school resumes. Participants rated sets of resumes that
included two pairs of resumes that were identical except for the name, with two resumes bearing
Anglo-American names and the other two bearing Arabic names. Participants also completed
measures of ethnic identity. Neither Whites nor Arabs rated the identical resumes differently.
However, Arab women rated one resume with an Arabic name significantly more positively than
its Anglo-American counterpart. Additionally, rater bias was positively correlated with how
closely women identified with being Arab, and was negatively correlated with how closely
women believed Arabs were perceived in society. This finding suggests that ethnic identity may
be related to the development of implicit intergroup bias.
تاثیر همزاد پنداری و قابل اطمینان بودن بر دلبستگی و وفاداری مشتریان به برند های ورزشی
Publisher: name: دانشگاه کردستان
Year: 2022

description: پژوهش حاضر تأثیر همزادپنداری و قابل اطمینان بودن بر دلبستگی و وفاداری مشتریان به برند ورزشی مشتریان استان مازندران را مورد بررسی قرار میدهد. روش این پژوهش از نوع کاربردی و توصیفی است و جامعه آماری این پژوهش مشتریان برند ورزشی آدیداس در استان مازندران بود که تعداد 384 نفر بر اساس جدول کرجسی و مورگان و روش نمونه گیری تصادفی خوشه ای انتخاب شدند. جهت گردآوری داده ها در این پژوهش از پرسشنامه های استاندارد استفاده شد. روشهای تجزیه وتحلیل داده ها بر اساس مدل معادلات ساختاری با استفاده از نرم افزارهای اس.پی.اس.اس و لیزرل مورد آزمون قرار گرفت. یافته¬های پژوهش نشان از تأثیر همزادپنداری با برند بر دلبستگی به برند، همزادپنداری با محصول بر دلبستگی به محصول، قابل اطمینان بودن برند بر دلبستگی به برند، قابل اطمینان بودن محصول بر دلبستگی به محصول، دلبستگی به محصول بر دلبستگی به برند، دلبستگی به برند بر وفاداری به برند و دلبستگی به محصول بر وفاداری به برند دارد. نتایج حاکی از این بود که دلبستگی به محصول ضمن این که خود موجب وفاداری مشتریان میشود علاوه بر آن موجب دلبستگی به برند شده و از این طریق نیز وفاداری مشتریان را برای برند آدیداس به همراه دارد
Gender Differences in Elective Science Course Enrollment: Influences of Stereotypes and Causal Attributions
Creators: name: White, Allison
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: Although adolescent girls and women enroll in more science courses in high school and college
than their male counterparts, the gender difference is reversed in subsequent employment in
science-related fields (Landivar, 2013; NCES, 2013). Traditional gender stereotype endorsement
and causal attributions about science success were investigated as predictors of elective science
course enrollment in high school students. Participants (N=275) reported science stereotype
endorsement and ability attributions for science success during the 10th grade, and transcript data
were collected after students’ completion of the 12th grade. The relationship between stereotype
endorsement and ability attributions was marginally significant for girls. There was a significant
gender by stereotype interaction, such that stereotype endorsement predicted ability attributions
more strongly for boys than for girls. Ability attributions were related to course enrollment for
both boys and girls. However, stereotype endorsement was not related to course enrollment.
These results support the hypothesis that ability attributions play a role in students’ elective
science course selection, and that stereotypes may play a role in maintaining gender disparities in
the sciences, particularly through their impact on boys’ educational choices.
Longitudinal study on children’s cognitive and social development according to Electronic Media Use
Creators: name: Díaz, Alice
name: Ritchie, Stuart
name: Kadar-Satat, Gitit
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Electronic media use
subject: Individual differences
subject: Intelligence
subject: Psychology
subject: FOS: Psychology
subject: Screens

description: Electronic Media Use (EMU) includes all activities mediated by screens like watching television and using tablets or computers (Granich et al., 2011). Several studies relate screens use with positive and negative outcomes for children development and psychological well-being (e.g. Nathanson et al., 2014; Schmidt et al., 2009; Page et al., 2010; Allen & Vella, 2015; Ferguson, 2017). This study will use the following variables from sweeps 3, 5 and 8 of BC1 form the Growing Up in Scotland study: Cohort Member (CM) age, sex, NSSEC, SIMD, equalized household income, raw scores of the BAS-II, raw scores of the WAIT-II, days — and amount of hours a day —CM watched TV or used other devices, raw scores of the Strengths and Difficulties questionnaire. The data will be analyzed using multiple regression models, cross-lagged(autoregressive) structural equation models, and state-trait models. These models will allow us to explore the stability of certain variables and the evolution of their reciprocal relationships across time.
Design of toughened composite sandwich structures
Creators: name: Irven, George
Publisher: name: Imperial College London
Year: 2023

description: Composite sandwich structures are used across a wide range of industries due to their exceptional stiffness and strength-to-weight ratios. These structures are brittle in nature and their failure is often more complex than the materials they replace. This research project considers methods aimed at increasing the damage resistance of these structures. Specifically, the work presented in this thesis shows that the impact performance of composite sandwich structures can be improved in a systematic manner. Initial impact tests were carried out to evaluate the resulting damage types. Following this, each aspect of the sandwich structure, the core, the skin, and the skin-core bond, was considered in an isolated manner. For each component, alterations aimed at improving the performance of the sandwich structure were devised. These toughening alterations were then tested under static conditions. The most successful alterations were a 3 wt% core shell rubber toughened skin matrix, a 2.5 parts per hundred resin 0.75 mm aramid fibre-reinforced foam core, and 1.5 mm deep 3 mm wide 13 mm spacing grid of grooves in the foam core. These alterations were then combined in sandwich structures that were subject to further impact testing. The result was a 26.5% improvement in back face deflection from 13.2 mm to 9.7 mm. Furthermore, an aramid fibre-reinforced foam core sandwich structure completely resisted perforation in a test where the control panel only absorbed 74.2% of the projectile energy. The key findings are that the toughness of all constituents and interfaces are important when considering the damage tolerance of a sandwich structure. If one element is toughened more than another, damage will likely be experienced in another element of the structure. An optimised structure will distribute damage in such a way as to maximise post-impact strength. It is considered that the techniques developed are very appropriate in optimising composite sandwich structures for transport, wind energy, and other applications. Throughout this thesis, further studies were carried out to gain a more complete understanding of the materials used. Epoxy foams were investigated over a range of densities, as a result, a transition in fracture performance has been identified. Architected polymers were studied with systematically varying bulk polymer properties. The outcome of this work has informed the design of toughened epoxy foams. Tensile testing of composite laminates was carried out to investigate the effect of adding tougheners on the tensile properties. Novel strain measurement techniques allowed micro cracks and small damage areas to be investigated. Tougheners were found to reduce the extent of these cracks and damage areas.
MS Gr. class. c. 6 1521
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 42. Philodemus, De rhetorica 2
Drawing by G.B. Malesci