bluuebunny/crossref_metadata_2025_split huggingface dataset:
Carrying out in-well work on emergency activation and milling loss prevention valve
Authors: Кульбаченко Л.В. , Дудочкин А.В. , Окишев Р.Н. , Коннон Б.В. , Гафаров Т.Н. 
Published: September 2024

Основной проблемой, рассмотренной в статье, стало неисправное функционирование клапана предотвращения потерь (КПП) в нижнем заканчивании скважины, заслонка которого не открылась запланированным конструкцией способом, что и привело к необходимости разработки новых методов для его открытия. В ходе работы были предложены два варианта решения проблемы: изоляция отверстия разрывного диска клапана и активация механизма открытия заслонки повышением давления или фрезерование заслонки и установка защитного рукава в случае неуспеха первого метода. Результат – первое в мире успешное фрезерование клапана предотвращения потерь с установкой защитного рукава с помощью оборудования на геофизическом кабеле.
The main problem addressed in the article was the malfunction of a fluid loss control valve (FLCV) in the lower completion. Its flapper failed to open as designed, preventing well interventions, Thus repair methods had to be designed. Two solutions were proposed: isolating the valve's burst disc and activating opening mechanism by increasing pressure, and milling the flapper and installing protective sleeve should the first method fail. The result is the world's first successful repair of FLCV.
RİSKLƏRİN AZALDILMASININ ƏSAS METODLARINDAN OLAN DİVERSİFİKASİYANIN İNVESTİSİYA QOYULUŞUNDA ROLU
Authors: Aliyeva Nesrin 
Published: September 2024

Diversifikasiya, kapitalın və investisiyanın kapital riskini azaltmaq üçün müxtəlif obyektlər arasında paylanması və investisiya portfellərinin davamlılığını artırmaq üçün güclü strategiyadır. Diversifikasiya strategiyası investorlara bir aktiv sinfinin və ya bazarın performansındakı dalğalanmaların digər aktiv sinifləri və ya bazarları ilə kompensasiya oluna biləcəyi balansı təmin edir. Bu, çox vaxt riski azaltmağa və uzunmüddətli investisiya məqsədləri olan investorlar üçün portfelin sabitliyini artırmağa kömək edir. Bununla belə, diversifikasiya strategiyası riski tamamilə aradan qaldırmır və hər bir investisiya qərarının diqqətlə nəzərdən keçirilməsini tələb edir.
Bu məqalə investisiya sahəsində diversifikasiyanın fundamental və strateji əhəmiyyətini araşdırır. Maliyyə bazarları təkamül etməyə davam etdikcə və saysız-hesabsız problemlər ortaya çıxdıqca, effektiv risklərin idarə edilməsinə ehtiyac hər şeydən üstün olur. Bu bazarların dinamik mənzərəsində risk investorlar üçün həmişə mövcud olan yoldaşdır. Bununla belə, riskin azaldılması sənətinə yiyələnmək, investisiya strategiyasının uğuruna əhəmiyyətli dərəcədə təsir edə biləcək mühüm bacarıqdır. Bu məqalə riskin azaldılmasında və daha davamlı investisiya portfelinin təşviqində diversifikasiyanın əsas rolunu araşdırır.
Eyni zamanda, bu məqalədə riskin azaldılması prosesində istifadə olunan əsas metodlardan olan diversifikasiyanın investisiya qoyuluşlarında əhəmiyyəti, gücü, əsas formaları, investisiyaların diversifikasiyasının müsbət və mənfi tərəfləri haqqında geniş məlumat verilir. İnvestisiya çoxumuz üçün sərvət yaratmağın açarıdır. İnvestisiyaların diversifikasiyası investorlara öz vəziyyətləri üçün artım və risk arasında düzgün tarazlığa nail olmaqda kömək etmək üçün mühüm vasitədir.
ƏSAS BECƏRMƏ ÜSULLARININ “QOBUSTAN” YUMŞAQ BUĞDA SORTUNUN DƏN MƏHSULDARLIĞINA VƏ MƏHSULUN STRUKTUR ELEMENTLƏRİNƏ TƏSİRİ
Authors: Feyzullayev Huseyn 
Published: September 2024

Sələf, torpaq becərmələri və qidalanma şəraiti fonunda əsas becərmə üsullarının buğda bitkisinin dən məhsuldarlığına və məhsulun struktur elementlərinə təsiri Cəlilabad Bölgə Təcrübə Stansiyasının ərazisində qoyduğumuz 3 amilli (2×3×3) tarla təcrübəsində apardığımız tədqiqatlarda öyrənilmiş və alınan nəticələr məqalədə öz əksini tapmışdır. Tədqiqatlar 2019-2021-ci vegetasiya illərində aparılmaqla standart metodlardan istifadə olunmuşdur. Belə ki, faktiki məhsuldarlıq təcrübədə hər bir lək üzrə birbaşa kombaynla yığılmış dən məhsulunun kütləsinə görə müəyyən edilmişdir. Məhsulun struktur analizi isə 1m2 sahədən ( ləklərin diaqonalı üzrə 4 yerdə uzunluğu 83 sm olan iki nişanlanmış cərgə (0,8 m × 0,3 m × 4 = 1 m2) yığılmış dərz nümunəsində aparılmışdır. Tədqiqatın obyekti “Qobustan” yumşaq buğda sortu olmuşdur.
Beləliklə, apardığımız 3 illik tədqiqatın orta nəticəsinə əsasən, demək olar ki, öyrənilən amillərin “Qobustan” yumşaq buğda sortunun dən məhsuldarlığına və məhsulun struktur elementlərinə təsiri vardır və dispersiya analizinə əsasən, bu təsir 0,01 ehtimal səviyyəsində əhəmiyyətlidir. Məhsuldarlıq isə variantdan asılı olaraq dinamik xarakter daşısa da, Dunkan kriteriyasına görə dispersiya analizinin nəticəsindən məlum olmuşdur ki, ən yüksək dən məhsulu noxud sələfindən sonra N60P60 + 10 ton peyin fonunda torpağı ağır diskli mala ilə 10-12 sm dərinlikdə 2 dəfə (çarpaz) diskləmədə alınmışdır. Nəticədə tədqiqatın optimal variantında “Qobustan” yumşaq buğda sortunun dən məhsuldarlığı 45,8 s/ha müəyyən edilmişdir.
ANÁLISE DA ESTABILIDADE DA COR DA RESINA COMPOSTA QUANDO SUBMETIDA A DIFERENTES SOLUÇÕES CORANTES COM E SEM POLIMENTO
Authors: Fulco Rayssa Maria Leite de Freitas , Brito José Gabriel Bernardino da Silva , Oliveira Matheus José da Camara de , Campos Lucas Camelo , Barboza Levi Freire , Santos Alane Beatriz Silva dos , Oliveira Lohanna Caleandra de , Rufino Thiago Oliveira , Guimarães Renata Pedrosa , Teixeira Hilcia Mezzalira , Nascimento Alexandre Batista Lopes do 
Published: September 2024

INTRODUÇÃO: O manchamento das resinas compostas está geralmente associado à insatisfação com a estética do sorriso de grande parte da população. As resinas compostas podem sofrer alterações quando expostas a cavidade bucal, como pigmentação e manchamento, devido a fatores extrínsecos ou intrínsecos em função de sua composição. A associação com o polimento traz à resina composta uma menor chance ao manchamento e maior qualidade na restauração. OBJETIVO: Esse estudo teve por objetivo avaliar a influência do acabamento/polimento e dos tipos de corantes sobre a estabilidade de cor de resinas compostas. MÉTODO: A partir de uma matriz metálica, foram confeccionadas 50 amostras de resinas compostas, sendo metade delas submetidas ao polimento. Foram avaliadas algumas variáveis como variação de luminosidade, estabilidade de cor e variação de brancura, por meio de espectrofotômetro (Easyshade – Vita), após 24h de imersão em água destilada e 3 meses após inserção nas soluções corantes: açaí, café, refrigerante de cola, molho de tomate e saliva artificial, a fim de saber o nível de manchamento das resinas compostas. RESULTADOS: Todos os grupos apresentaram alterações na cor, porém quando comparados os grupos de soluções, o açaí e o café tiveram maior destaque em nível de manchamento, principalmente quando não submetidos ao polimento. CONCLUSÃO: Concluiu-se que existe uma interação significativa entre a estabilidade de cor da resina composta estudada com os agentes pigmentantes e o polimento.
Temporal localization of upper extremity bilateral synergistic coordination using wearable accelerometers
Authors: Zaidi Khadija F. , Wei Qi 
Published: September 2024

Background
The human upper extremity is characterized by inherent motor abundance, allowing a diverse array of tasks with agility and adaptability. Upper extremity functional limitations are a common sequela to Stroke, resulting in pronounced motor and sensory impairments in the contralesional arm. While many therapeutic interventions focus on rehabilitating the weaker arm, it is increasingly evident that it is necessary to consider bimanual coordination and motor control.

Methods
Participants were recruited to two groups differing in age (Group 1 (n = 10): 23.4 ± 2.9 years, Group 2 (n = 10): 55.9 ± 10.6 years) for an exploratory study on the use of accelerometry to quantify bilateral coordination. Three tasks featuring coordinated reaching were selected to investigate the acceleration of the upper arm, forearm, and hand during activities of daily living (ADLs). Subjects were equipped with acceleration and inclination sensors on each upper arm, each forearm, and each hand. Data was segmented in MATLAB to assess inter-limb and intra-limb coordination. Inter-limb coordination was indicated through dissimilarity indices and temporal locations of congruous movement between upper arm, forearm, or hand segments of the right and left limbs. Intra-limb coordination was likewise assessed between upper arm-forearm, upper arm-hand, and forearm-hand segment pairs of the dominant limb.

Findings
Acceleration data revealed task-specific movement features during the three distinct tasks. Groups demonstrated diminished similarity as task complexity increased. Groups differed significantly in the hand segments during the buttoning task, with Group 1 showing no coordination in the hand segments during buttoning, and strong coordination in reaching each button with the upper arm and forearm guiding extension. Group 2’s dissimilarity scores and percentages of similarity indicated longer periods of inter-limb coordination, particularly towards movement completion. Group 1’s dissimilarity scores and percentages of similarity indicated longer periods of intra-limb coordination, particularly in the coordination of the upper arm and forearm segments.

Interpretation
The Expanding Procrustes methodology can be applied to compute objective coordination scores using accessible and highly accurate wearable acceleration sensors. The findings of task duration, angular velocity, and peak roll angle are supported by previous studies finding older individuals to present with slower movements, reduced movement stability, and a reduction of laterality between the limbs. The theory of a shift towards ambidexterity with age is supported by the finding of greater inter-limb coordination in the group of subjects above the age of thirty-five. The group below the age of thirty was found to demonstrate longer periods of intra-limb coordination, with upper arm and forearm coordination emerging as a possible explanation for the demonstrated greater stability.
Health-related issues of people experiencing homelessness in Thailand: a scoping review
Authors: Wattanapisit Apichai , Muttarat Pannawat , Sottiyotin Tida , Puangsri Pavarud , Aungkawattanapong Nadvadee , Wattanapisit Sanhapan , Kotepui Manas 
Published: September 2024

Introduction
Homelessness is a significant global challenge affecting people worldwide. In Thailand, the health-related issues of people experiencing homelessness have not been a major research focus. This scoping review aims to explore the scope of research on health-related issues among people experiencing homelessness in Thailand.

Methods
Eight databases (ACI, AMED, Embase, PsycINFO, PubMed, Scopus, TCI, and Web of Science) were searched from inception of each database to August 2022. The search terms consisted of terms related to people experiencing homelessness in Thailand. Research articles published in Thai or English were included.

Results
Of 186 articles, 167 were excluded during duplicate removal (n = 45), title and abstract screening (n = 106), seeking for full-text articles (n = 2), and full-text screening (n = 14). Nineteen articles were included for extraction and synthesis. Three topics (health status, causes of homelessness and effects of homelessness on health, healthcare and social services) were summarised. The included studies described mental health (e.g., depression, suicide, alcohol and drug dependence), physical health (e.g., poor self-hygiene, injuries, accidents), and health behaviours (e.g., alcohol drinking, substance use, unsafe sex). Social behaviours and health problems linked to homelessness, and several factors related to health and living conditions (e.g., stigma, discrimination) were reported. People experiencing homelessness had some barriers to access to healthcare and social services (e.g., health insurance, social welfare, financial difficulties).

Conclusions
The majority of studies on health-related issues in people experiencing homelessness in Thailand are descriptive studies. Future studies should focus on the interactions and mechanisms between homelessness and health.
Innovative Assessment Practices Aligned with India’s National Educational Policy-2020
Authors: Pathak Jumisree Sarmah , Maity Shiuli 
Published: September 2024

The National Education Policy -2020 [1] is the latest education policy of India, which strives to achieve benchmarks in the development of the educational scenario of India leading the students towards achieving the aspirational goals of 21st century education. NEP 2020 advocates for multidisciplinary education, multiple entry-exit and research-based programmes which mandates for a swift transition from traditional methods of assessment to innovative assessment techniques which would be more flexible, comprehensive and competency-based that would ensure a deeper understanding of subject matter than just memorizing facts. It aims to promote critical and higher order thinking and applying their knowledge to real-world situations. The primary objective of the article is to throw light on some non-traditional and innovative assessment techniques that align with the vision of NEP 2020. The researchers have employed the content analysis approach to explain these innovative techniques such as- experiential learning, holistic education, present opposite’s point of view, plot a family tree, Adaptive Learning Assessment and so on. However, further research may enlighten more such approaches according to the changing scenario in the global context and a comprehensive guide to apply these techniques.
Quantitative Flow Cytometry Measurements in Antibodies Bound per Cell Based on a CD4 Reference
Authors: Wang Lili , Degheidy Heba , Abbasi Fatima , Mostowski Howard , Marti Gerald , Bauer Steven , Hoffman Robert A. , Gaigalas Adolfas K. 
Published: January 2016

AbstractMulticolor flow cytometer assays with fluorescently labeled antibodies are routinely used in clinical laboratories to measure the cell number of specific immunophenotypes and to estimate expression levels of specific receptors/antigens either on the cell surface or intracellularly. The cell number and specific receptors/antigens serve as biomarkers for pathological conditions at various stages of a disease. Existing methods and cell reference materials for quantitative expression measurements have not yet produced results that are of wide clinical interest or are instrument‐independent across all fluorescence channels. This unit details a procedure for quantifying surface and intracellular biomarkers by calibrating the output of a multicolor flow cytometer in units of antibody bound per cell (ABC). The procedure includes (1) quality control of the flow cytometer, (2) fluorescence intensity calibration using hard dyed microspheres assigned with fluorescence intensity values, (3) compensation for fluorescence spillover between adjacent fluorescence channels, and (4) application of a biological reference calibrator to establish an ABC scale. The unit also points out current efforts for quantifying biomarkers in a manner that is independent of instrument platforms and reagent differences. © 2016 by John Wiley & Sons, Inc.
High‐Speed Spun PET Nanocomposites for Smart Multifunctional Approaches
Authors: Dastjerdi Roya , Mojtahedi M. R. M. , Tavanaie M. A. 
Published: January 2016

ABSTRACTHigh‐speed spinning at 3000 m/min with a remarkable potential for mass production was conducted to produce continuous fine‐multifilament nanocomposite yarns on a pilot plant scale. Nanocomposite fabrics were produced via a simultaneous draw‐texturing process followed by weft knitting. The fabric samples were examined in terms of thermophysiological comfort, tribological performance, and the resistance against structural degradation under ultraviolet (UV) irradiation. The abrasion resistance was improved by enhancement of rupture work while decreasing the crystallinity. Improvement of more than 200% was recorded in fabric abrasion resistance upon using a sample containing the maximum content of nanoparticles (NPs). A remarkable improvement in resistance was recorded against structural degradation under UV irradiation for the UV‐irradiated polyethylene terephetalate (PET) nanocomposites as compared to UV‐irradiated monocomponent PET. The study of the effect of UV irradiation confirmed our recent finding about a UV‐induced solid‐state interaction mechanism in the case of PET nanocomposites as well as polypropylene (PP) nanocomposites. Optimal comfortable characteristic was achieved upon using 5 wt% nanosilver masterbatch. At low environment temperatures, this sample has lower vapor permeability than monocomponent PET fabrics. By raising the temperature, the rate of improving the vapor permeability for the composite fabrics became markedly more than that of monocomponent fabrics. It is of great interest that these desirable changes in permeability can be achieved in the range of common environment temperatures (i.e. 15–35°C), which exactly meet the body requirements. Consequently, nanocomposite fabrics can smartly adapt the permeability requirements for the human body by changing the environment temperatures.
Gelierte komplexe Fluide – die Verbindung einzigartiger Strukturen mit mechanischer Stabilität
Authors: Stubenrauch Cosima , Gießelmann Frank 
Published: January 2016

AbstractGelierte komplexe Fluide sind weiche Materialien, in denen die Mikrostruktur des komplexen Fluids mit der mechanischen Stabilität eines Gels verbunden wird. Um ein geliertes komplexes Fluid zu erhalten, fügt man entweder einen Gelator zu einem komplexen Fluid hinzu, oder man ersetzt das in einem Gel enthaltene Lösungsmittel durch ein komplexes Fluid. Das bekannteste Beispiel eines “natürlichen” gelierten komplexen Fluids ist die Zelle. Es gibt verschiedene Strategien, mit denen man ein geliertes komplexes Fluid herstellen kann; eine dieser Strategien ist die orthogonale Selbstorganisation, also die unabhängige, aber gleichzeitige Bildung von zwei koexistierenden, selbstorganisierten Strukturen innerhalb eines Systems. Der vorliegende Aufsatz zielt darauf ab, die Struktur sowie potenzielle Anwendungen verschiedener gelierter komplexer Fluide zu beschreiben und abzuklären, ob das entsprechende System durch orthogonale Selbstorganisation entsteht.
Reversible pH Switch of Two‐Quartet G‐Quadruplexes Formed by Human Telomere
Authors: Galer Petra , Wang Baifan , Šket Primož , Plavec Janez 
Published: January 2016

AbstractA four‐repeat human telomere DNA sequence without the 3′‐end guanine, d[TAGGG(TTAGGG)2TTAGG] (htel1‐ΔG23) has been found to adopt two distinct two G‐quartet antiparallel basket‐type G‐quadruplexes, TD and KDH+ in presence of KCl. NMR, CD, and UV spectroscopy have demonstrated that topology of KDH+ form is distinctive with unique protonated T18⋅A20+⋅G5 base triple and other capping structural elements that provide novel insight into structural polymorphism and heterogeneity of G‐quadruplexes in general. Specific stacking interactions amongst two G‐quartets flanking base triples and base pairs in TD and KDH+ forms are reflected in 10 K higher thermal stability of KDH+. Populations of TD and KDH+ forms are controlled by pH. The (de)protonation of A20 is the key for pH driven structural transformation of htel1‐ΔG23. Reversibility offers possibilities for its utilization as a conformational switch within different compartments of living cell enabling specific ligand and protein interactions.
First Principles Calculations for Hydrogenation of Acrolein on Pd and Pt: Chemoselectivity Depends on Steric Effects on the Surface
Authors: Tuokko Sakari , Pihko Petri M. , Honkala Karoliina 
Published: January 2016

AbstractThe chemoselective hydrogenation of acrolein on Pt(111) and Pd(111) surfaces is investigated employing density functional theory calculations. The computed potential energy surfaces together with the analysis of reaction mechanisms demonstrate that steric effects are an important factor that governs chemoselectivity. The reactions at the C=O functionality require more space than the reactions at the C=C functionality. Therefore the formation of allyl alcohol is more favorable at low coverage, while the reduction of the C=C bond and the formation of propanal becomes kinetically more favorable at higher coverage. The elementary reaction steps are found to follow different reaction mechanisms, which are identified according to terminology typically used in organometallic catalysis. The transition state scaling (TSS) relationship is demonstrated and the origin of multiple TSS lines is linked to variation of an internal electronic structure of a carbon skeleton.
Stereoelectronic Model To Explain Highly Stereoselective Reactions of Seven‐Membered‐Ring Oxocarbenium‐Ion Intermediates
Authors: Beaver Matthew G. , Buscagan Trixia M. , Lavinda Olga , Woerpel K. A. 
Published: January 2016

AbstractNucleophilic attack on seven‐membered‐ring oxocarbenium ions is generally highly stereoselective. The preferred mode of nucleophilic attack forms the product in a conformation that minimizes transannular interactions, thus leading to different stereoselectivity as compared to that of reactions involving six‐membered‐ring oxocarbenium ions.
No More HF: Teflon‐Assisted Ultrafast Removal of Silica to Generate High‐Surface‐Area Mesostructured Carbon for Enhanced CO2 Capture and Supercapacitor Performance
Authors: Singh Dheeraj Kumar , Krishna Katla Sai , Harish Srinivasan , Sampath Srinivasan , Eswaramoorthy Muthusamy 
Published: January 2016

AbstractAn innovative technique to obtain high‐surface‐area mesostructured carbon (2545 m2 g−1) with significant microporosity uses Teflon as the silica template removal agent. This method not only shortens synthesis time by combining silica removal and carbonization in a single step, but also assists in ultrafast removal of the template (in 10 min) with complete elimination of toxic HF usage. The obtained carbon material (JNC‐1) displays excellent CO2 capture ability (ca. 26.2 wt % at 0 °C under 0.88 bar CO2 pressure), which is twice that of CMK‐3 obtained by the HF etching method (13.0 wt %). JNC‐1 demonstrated higher H2 adsorption capacity (2.8 wt %) compared to CMK‐3 (1.2 wt %) at −196 °C under 1.0 bar H2 pressure. The bimodal pore architecture of JNC‐1 led to superior supercapacitor performance, with a specific capacitance of 292 F g−1 and 182 F g−1 at a drain rate of 1 A g−1 and 50 A g−1, respectively, in 1 m H2SO4 compared to CMK‐3 and activated carbon.
ATP‐Releasing Nucleotides: Linking DNA Synthesis to Luciferase Signaling
Authors: Ji Debin , Mohsen Michael G. , Harcourt Emily M. , Kool Eric T. 
Published: January 2016

AbstractA new strategy is reported for the production of luminescence signals from DNA synthesis through the use of chimeric nucleoside tetraphosphate dimers in which ATP, rather than pyrophosphate, is the leaving group. ATP‐releasing nucleotides (ARNs) were synthesized as derivatives of the four canonical nucleotides. All four derivatives are good substrates for DNA polymerase, with Km values averaging 13‐fold higher than those of natural dNTPs, and kcat values within 1.5‐fold of those of native nucleotides. Importantly, ARNs were found to yield very little background signal with luciferase. DNA synthesis experiments show that the ATP byproduct can be harnessed to elicit a chemiluminescence signal in the presence of luciferase. When using a polymerase together with the chimeric nucleotides, target DNAs/RNAs trigger the release of stoichiometrically large quantities of ATP, thereby allowing sensitive isothermal luminescence detection of nucleic acids as diverse as phage DNAs and short miRNAs.