bluuebunny/crossref_metadata_2025 huggingface dataset:
Merkez ve Taşrada Okul Öncesi Öğretmenliği: Tekrar Aynı Yere Atanmak İster Misiniz?
Authors: Tarman İlknur , Sarıkaya Seval
Published: September 2024

Bu çalışmanın amacı, merkez ve taşrada okul öncesi öğretmenliği yapan eğitimcilerin tekrar aynı yerde görevlerini icra edip etmeme konusundaki tutumlarını ortaya çıkararak, merkez ve taşrada okul öncesi öğretmeni olmak ile ilgili görüşlerini ortaya koymaktır. Nitel araştırma yöntemlerinden olgubilim (fenomenoloji) desenine göre oluşturulan araştırma, merkez ve taşrada görev yapan 16 okul öncesi öğretmeni ile gerçekleştirilmiştir. Veriler, çevrimiçi ve yüz yüze görüşmeler yoluyla toplanmıştır. Verilerin analizinde içerik analizi yöntemi kullanılmıştır. Araştırmanın sonucunda, merkez ve taşrada aynı görevi yapan okul öncesi öğretmenlerinin farklı deneyimlerinin olduğu, merkez ve taşradaki öğretmenlerin memnuniyet/memnuniyetsizlik ölçütlerini etkileyen pek çok etkenin bulunduğu ortaya çıkmıştır. Merkezde görevli öğretmenler, okullarının donanımları, konumları ve çevresi ile ilgili çoğunlukla olumlu ifadelerde bulunurken; taşrada görevli öğretmenler özellikle fiziksel imkanlar açısından büyük problemlerle karşılaştıklarını, sınıflarında materyal eksikliği bulunduğunu, ısınma-elektrik sorunları yaşadıklarını, okullarının merkeze uzak olduğunu, toplu ulaşım aracı olmadığını belirtmişlerdir. Sonuç olarak, taşrada görev yapan okul öncesi öğretmenlerinin görüş ve deneyimlerinin dikkate alınması; eğitimde imkân ve fırsat eşitliği sağlanmasına, örgütsel/kurumsal başarı sağlanmasına ve özellikle okul öncesi öğretmenlerinin görevinden/kurumundan memnun olmasına katkı sağlayacaktır.
Özel Eğitim Öğretmen Adaylarının Yeniden Yerleştirmesiz Çoklu Uyaran Tercihi Değerlendirme Performanslarını Artırmada Denetleyici Koçluğun Etkileri
Authors: Tomris Gözde , Yücesoy-Özkan Şerife , Gülboy Emrah
Published: September 2024

Bu çalışmada, özel eğitim öğretmen adaylarının, yeniden yerleştirmesiz çoklu uyaran tercihi değerlendirme performanslarını artırmada mesleki gelişim modeli olarak denetleyici koçluğun etkilerini değerlendirmek ve özel eğitim öğretmen adaylarının kendilerine sunulan denetleyici koçluk desteğine ilişkin görüşlerini incelemek amaçlanmıştır. Çalışmada, tek-denekli deneysel desenlerden katılımcılar arası çoklu başlama düzeyi deseni kullanılmıştır. Çalışmaya, özel eğitim bölümü son sınıf öğrencisi olan dört öğretmen adayı ve onların halihazırda çalıştıkları öğrencileri katılmıştır. Çalışmada öğretmen adaylarına bir mesleki gelişim modeli olarak denetleyici koçluk sunulmuş ve öğretmen adaylarının uyaran tercihi değerlendirme performansları incelenmiştir. Bulgular, bir mesleki gelişim modeli olarak denetleyici koçluğun, öğretmen adaylarının yeniden yerleştirmesiz çoklu uyaran tercihi değerlendirmelerine yönelik uygulama güvenirliği performanslarını artırdığını ve katılımcıların performanslarındaki bu artışın uygulama tamamlandıktan bir ay sonra da korunduğunu göstermiştir. Ayrıca özel eğitim öğretmen adaylarının mesleki gelişim modeli olarak sunulan denetleyici koçluğa ilişkin olumlu görüşler sundukları belirlenmiştir. Elde edilen bulgular, koçluk ve uyaran tercihi değerlendirmesi açısından alanyazın çerçevesinde tartışılmıştır.
An Investigation of Teaching and Learning Centers of Ivy League Universities in Terms of Their Contribution to Quality Higher Education
Authors: Akınlar Aylin , Kavgaoğlu Derya
Published: September 2024

Teaching and learning centers play an important role in ensuring access to high-quality education.  The goal of this research is to investigate the teaching and learning centers of Ivy League universities. The research is qualitative, and the document analysis method was preferred. The data obtained from document analysis were subjected to content analysis. Higher education institutions made up the population of the study, and the sample included the web pages of Ivy League University Teaching and Learning Centers, which were chosen using criterion sampling from purposive sampling methods. According to the research findings, Ivy League Teaching and Learning Centers promote quality higher education through active activities in five categories and 26 themes: strengthening academic and administrative staff, supporting students, developing educational programs, and university-community cooperation. These activities are critical for successful outcomes while applying to higher education institutions in Türkiye and other developing nations. Considering the findings of the study, it is thought that these functions, which make Ivy League Universities a powerful actor in the field of education, would be beneficial to be implemented both in Türkiye and around the world. As a matter of fact, teaching and learning centers serve the individual and society as a national social intervention tool where all stakeholders, the curriculum and the educational institution as a learning organization are also developed by taking education beyond the curriculum.
Yâsin Sûresi 36/6. Âyetin Kur’an Bütünlüğünde Anlaşılması Meselesi: Hz. Peygamber’in Gönderildiği Kavmin Ataları Uyarılmadı Mı?
Authors: Çelik Ersin
Published: September 2024

Kur’ân-ı Kerim’de bazı konularda ilk bakışta çelişkili gibi görünen âyet grupları yer almaktadır. Bu bağlamda Kur’an’da yer alan şu üç grup âyet de uzlaştırılması gereken âyetlerdendir. Bunlardan birinci grup âyette, her ümmete bir resul ve uyarıcı gönderildiği, uyarıcı gönderilmeyen hiçbir memleketin helak edilmediği belirtmektedir. İkinci grup âyette ise Hz. Peygamber’in daha önce uyarılmayan bir kavmi uyarmak üzere gönderildiği açıklanmaktadır. İkinci grup âyetler içerisinde değerlendirilebilecek olan ve Hz. Peygamber’in ataları uyarılmayan bir kavmi inzâr için gönderildiğini belirten Yâsin 36/6. âyet bunlar içerisinde en çok dikkat çekilen âyet konumundadır. Zira Hz. Peygamber’den önce Araplara peygamber gönderildiği bilinmektedir. Üçüncü grup ise Mekke müşriklerinin daha önce de kendilerine ve atalarına yeniden dirilmeyle ilgili Hz. Peygamber’in ikazlarına benzer uyarıların yapıldığına dair sözlerini aktaran âyetlerdir. Tüm bu âyetlerin geçmişten günümüze nasıl izah edildiği ilgi çekici olmakla birlikte özellikle burada Yâsin 36/6. âyetin kilit noktada olduğu görülmektedir. Nitekim klasik dönemden itibaren bu âyetin tefsirinde “ataları uyarılmayan” anlamının yanında alternatif olarak “ataları da uyarılan” şeklinde tam aksi bir anlam daha verilmektedir. Modern dönemde bazı meallerde de bu ikinci anlam tercih edilmektedir. Bu çalışmada, Hz. Peygamber’in “ataları uyarılmayan bir topluma” gönderildiğini belirten Yâsin 36/6 ile “kendileri uyarılmayan topluma” gönderildiğini belirten el-Kasas 28/46 ve es-Secde 32/3 gibi âyetlerin aynı anlamda anlaşılması gerektiği savunulmaktadır. Bu anlamın hem Yâsin 36/6. âyetin bağlamına hem de Hz. İbrahim ve İsmail’den itibaren uyarıcı gelmeden geçen uzun bir süreye işaret etmesinin daha doğru olduğu vurgulanmaktadır. Öte yandan çalışmada, bu üç grup âyetin uzlaştırılmasına dair klasik ve çağdaş dönem tefsirlerdeki görüşler değerlendirilmekte ve söz konusu âyetlerin nasıl tercüme edildiği belli başlı mealler üzerinden incelenmektedir.
Формування методики лазерного моніторингу надзвичайної ситуації техногенного характеру на території, що зазнала ракетно-артилерійського ураження
Authors: Rashkevich Olexandr , Rashkevich Nina , Shevchenko Roman , Khmyrova Anastasia
Published: September 2024

Мета роботи: формування методики проведення лазерного моніторингу надзвичайної ситуації техногенного характеру на території, що зазнала ракетно-артилерійського ураження.
Метод: застосовувались методи системного аналізу, теорії ймовірностей, теорії прийняття рішень, математичного та імітаційного моделювання.
Результати дослідження: трасовий вимір методом диференціального поглинання, що в основі методики, полягає у виключені з аналізу частку сигналу, зумовлену розсіюванням випромінювання на неоднорідності середовища та нерезонансним поглинанням його.
Теоретична цінність дослідження: набули подальшого розвитку теоретичні основи методу диференціального поглинання лазерного випромінювання.
Практична цінність дослідження: результати сприяють своєчасному реагуванню на перевищення гранично-допустимих концентрацій шкідливих (забруднюючих) речовин, а також обмеження негативних наслідків для життя та здоров'я населення, навколишнього середовища.
Цінність дослідження: створення унікального підходу до оцінки та аналізу наслідків надзвичайної ситуації унаслідок наявності в атмосферному повітрі шкідливих (забруднюючих) речовин понад гранично-допустимі концентрації на території, що зазнала ракетно-артилерійського ураження.
Обмеження дослідження: обмеження, в основному, пов’язані з впливом фізичних факторів, умов середовища, що виникають на території, що зазнала ракетно-артилерійського ураження.
Recommendations for the operational formation of troops (forces) and fire damage in operations: withdrawal of troops from under attack, fighting in an encirclement, exit from an encirclement
Authors: Semenenko Oleh , Melnychenko Andrii , Surhai Volodymyr , Korotia Volodymyr , Voytsehovskiy Roman , Sovhiria Tetiana
Published: September 2024

Мета роботи: розроблення рекомендацій щодо оперативної побудови військ (сил) та вогневого ураження противника в операціях: виведення військ із під удару, бій в оточенні, вихід із оточення.
Метод дослідження: методи аналізу та синтезу, дедукції та індукції, метод аналогій та порівняння, методи експертного оцінювання.
Практична цінність дослідження: проведений аналіз останніх досліджень і публікацій щодо особливостей операцій виведення військ із під удару, виходу із оточення та ведення бою в оточенні; визначені основні заходи щодо організації таких операцій; запропоновано рекомендації щодо ефективного проведення таких операцій; визначено основні напрями трансформації системи вогневого ураження під час виведення військ із під удару та виходу із оточення; розроблено рекомендації щодо організації вогневого ураження противника в операціях виведення військ із під удару, виходу із оточення та бою в оточенні з урахуванням сучасних особливостей технологічного інноваційного розвитку; визначені основні елементи оперативної побудови військ (сил) в операціях (бойових діях); розроблено рекомендації щодо ефективної оперативної побудови військ в такого роду операціях; визначено алгоритм організації оперативної побудови військ під час виведення їх із під удару противника та виходу з оточення; визначено основні та додаткові фактори, які впливають на ефективність вогневого ураження противника та ефективність оперативної побудови в таких операціях, а також дана оцінка їх важливості.
Цінність дослідження: у статті розкрито сучасні особливості організації операцій виведення військ із під удару, виходу із оточення та ведення бою в оточенні, а також сформовані рекомендації щодо ефективної реалізації таких операцій.
Майбутні дослідження: напрямами подальших досліджень можу бути проведення багатовимірного аналізу розвитку російсько-українського конфлікту, а також детальне дослідження трансформації класичних форм і способів ведення збройної боротьби.
Тип статті: теоретичний, практичний.
SOSYAL MEDYADA GERÇEKLEŞEN AKTARIM OLGUSUNU FREUDYEN VE LACANCI YAKLAŞIMLAR ÜZERİNDEN ELEŞTİREL BİR DEĞERLENDİRME
Authors: Ateş İbrahim Şahin , Tan Hakan
Published: October 2024

Özne, sosyal medyada sadece yaşadığı kendi tarihini aktarmamaktadır aynı zamanda sosyal medyanın simgesel ve gerçekliği tarafından oluşturulan aktarımlar tarafından yaşatılmakta ve güdülenmektedir. Çalışmanın amacı, sosyal medya çalışmalarında aktarım kavramını bir araç olarak işe koşan araştırmacılar için kavramın genel yapısı ve ilişkili olduğu diğer psikanalitik hususların bir tartışmasını sunmak suretiyle gelecek çalışmalara zemin hazırlamaktır. Psikanalitik klinik ve teori açısından temel kavramlardan birisi olan aktarım kavramının Sigmund Freud’un eserindeki ilk görünümleri yazarın ilk eserlerine dek uzanır. Bu doğrultuda kavramın gelişiminin Freud’un eserinin genel gelişimine eşlik ettiğini öne sürebilmek mümkündür. Jacques Lacan ise 1950li yıllardan itibaren Freud’un eserini bilhassa yapısalcı ve Hegelci kaynaklara başvurarak yeniden değerlendirmiş, bunu yaparken İmgesel, Simgesel ve Gerçek olarak isimlendirdiği üçlü topolojik anlayışını geliştirmiştir. Bu çalımada aktarım kavramının Freudcu ve Lacancı izahı, kavramın Freud’un eserindeki gelişiminin ve Lacan’ın eserindeki yeniden değerlendirilişinin sunulabileceği şekilde ele alınmıştır. Akabinde, genel yapısı nakledilen ve diğer psikanalitik ve felsefî kavramlar ile ilişkisi sunulan aktarım kavramının sosyal medyanın araştırmacılara sunduğu görüngüler çerçevesinde bir araştırma aracı olarak hangi yollarla kullanılabileceği ve bu kullanımın olası sınırları tartışılmıştır.
Obstetric psychoprophylaxis and duration of the active phase dilation period: A relational study
Authors: Pariajulca Fernández Israel Roberth , Jiménez Heredia David Julio , Anco Huaynates Paola Noemi , Barraza Carrillo Kissuary Fritzya
Published: October 2024

Objective: To identify the correlation between obstetric psychoprophylaxis and the duration of the active phase dilation period in pregnant women at the Centro Materno Infantil Daniel Alcides Carrión, Lima – 2019. Materials and methods: Non-experimental cross-sectional study. a documentary review was carried out and was complemented with the application of two data collection forms as an instrument, considering as variables the clinical history, age, number of pregnancies, number of prenatal care, gestational age at the first obstetric psychoprophylaxis session and the number of psychoprophylaxis sessions recorded. Results: The study included 165 medical records of pregnant women whose deliveries were attended at the daniel alcides carrión maternal and child center in lima during 2019, from which it was found that 69.09 % of the pregnant women ranged from 18 to 29 years of age; 77. 58 % of them were multiparous, 69 % showed more than 3 prenatal care, 91 % started their first obstetric psychoprophylaxis session between 28 to 37 weeks, 55.76 % had 4 to 6 obstetric psychoprophylaxis sessions and 68 % had a duration of up to 6 hours in the dilation period – active phase. Conclusions: Obstetric psychoprophylaxis has shown a significant level of incidence with respect to the duration of the active phase dilation period, demonstrating the benefit obtained by the pregnant woman during labor.
Indication-based use of low molecular weight heparin during pregnancy: A retrospective study in Northern Greece
Authors: Athanasiadis Nikolaos , Boureka Eirini , Tsakiridis Ioannis , Mamopoulos Apostolos , Kalogiannidis Ioannis , Athanasiadis Apostolos , Dagklis Themistoklis
Published: October 2024

Introduction: Venous thromboembolism (VTE) is a condition with high morbidity and mortality rates and presents as the third leading cause of cardiovascular deaths, globally. During the antenatal period, the risk of VTE occurrence increases, therefore, in pregnant women at high-risk for VTE, the use of low molecular weight heparin (LMWH) is recommended. This study aimed to investigate the indication-based administration of LMWH in pregnancy. Material and methods: This was a retrospective cohort study (2019-2022) conducted at the Third Department of Obstetrics and Gynecology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece. All pregnant women at the first trimester of pregnancy were eligible. Their physical characteristics were recorded and information about their personal, familial, gynecological and obstetrical medical history was collected. By utilizing the above characteristics, a score of the risk of developing VTE during pregnancy was calculated for each woman, using the algorithm recommended by the Royal College of Obstetricians & Gynecologists. Results: In total, 2,716 pregnant women were included in the study. Of these, 149 (5.5%) received LMWH throughout their pregnancy with only 2 of them (0.1%) having appropriate indications. Of the women not prescribed LMWH, 2,567 (94.5%), none had an indication for LMWH administration. Notably, 495 (19.3%) women had a history of at least one miscarriage and 89 (59.7%) of them used LMWH, regardless of whether they had an indication or not. Conclusion: There was a high percentage of women with no indication for LMWH who, in fact, received this medication. Physicians should refrain their use following evaluation based on appropriate risk factors.
Informe de Evento 2023. Hepatitis B, C y B-Delta
Authors: Sepúlveda Medina Henry
Published: October 2024

Este informe de evento tiene como propósito describir el comportamiento epidemiológico de las hepatitis B, C y B-Delta en Colombia durante el 2023, de conformidad con los procesos establecidos para la notificación al sistema de vigilancia en salud pública, Sivigila, a fin de generar información oportuna, válida y confiable para orientar medidas de prevención y control.
Numerical Study of Fuel Spiking Induced Surge in a Small-scale Aircraft Engine
Authors:   Institute for Aero Engine, Tsinghua University, Wen Mengyang , Yang Heli ,   Institute for Aero Engine, Tsinghua University, Ding Chuang ,   Hawk Power Technology Co., Ltd, Li Jiaan ,   School of Vehicle and Mobility, Tsinghua University, Zou Wangzhi ,   Institute for Aero Engine, Tsinghua University, Wang Baotong ,   Institute for Aero Engine, Tsinghua University, Zheng Xinqian ,   School of Vehicle and Mobility, Tsinghua University
Published: October 2024

Flow instabilities, such as surge and stall, in fans and compressors seriously threaten the performance and structural integrity of aero engines. Accurate prediction of flow behaviours related to these aerodynamic instability phenomena has long been focused on. In this paper, a full-engine model for a small-scale turbofan engine is established based on the threedimensional Unsteady Reynolds-Averaged Navier-Stokes (URANS) governing equation. Based on the model, the unsteady simulation is conducted for the fuel spiking process to force the small-scale turbofan engine into surge. The simulation successfully captured the flow instability behaviours in the engine, and a detailed analysis of the main aerodynamic parameters of engine sections, axial force, and power balance of the engine within one surge cycle is conducted. In this case, the compressor enters deep surge, and the fan enters mild surge. Moreover, the fan rotor blades suffer the most severe axial force among all the blade rows. According to the unsteady flow behaviours, the compressor rotor blades at the trailing edge suffer the most serious damage caused by the reversed flow shock wave.
Experimental Heat Transfer and Cooling Effectiveness over an Effusion Wall with Internal Jet-Array Impingement: Influence of Hole Arrangement
Authors:   Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Institute of Turbomachinery,School of Energy & Power Engineering, Xi’an Jiaotong University, Wu Hang , Yang Xing ,   Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Institute of Turbomachinery,School of Energy & Power Engineering, Xi’an Jiaotong University, Liu Zhao ,   Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Institute of Turbomachinery,School of Energy & Power Engineering, Xi’an Jiaotong University, Feng Zhenping ,   Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Institute of Turbomachinery,School of Energy & Power Engineering, Xi’an Jiaotong University
Published: October 2024

The arrangement pattern of film and jet impingement holes plays an important role in heat transfer and cooling characteristics of an effusion cooling system. This study provides a multifaceted and integrated comparison of inline and staggered film-jet impingement cooling systems, concerning heat transfer coefficients, adiabatic cooling effectiveness, and conjugate heat transfer characteristics. Detailed adiabatic cooling effectiveness contours are mapped by applying Pressure Sensitive Paint (PSP). Heat transfer coefficients are measured using a steady heat flux method with a film foil heater. Furthermore, a conjugate heat transfer method evaluates the combined cooling effects of internal jet impingement, in-hole convection, solid conduction, and external film cooling, and the resulting temperatures on the external surface of the effusion wall are measured through an infrared (IR) camera. Results demonstrate that in the range of blowing ratios M = 0.3−2.0, adiabatic effectiveness peaks at M = 0.6 for both configurations of hole arrangement, and then decreases with further increasing the coolant flow rate. Nevertheless, increasing the blowing ratio continuously improves overall effectiveness. The staggered hole cooling geometry exhibits higher adiabatic and overall effectiveness levels relative to the counterpart. Though local distribution patterns of heat transfer coefficients are quite different for the two hole arrangements, their laterally-averaged values are approximate to one another.
Effect of blade-row axial spacing on the stage performance of an axial supersonic through-flow fan
Authors:   School of Aerospace Engineering, Beijing Institute of Technology, Sun Shijun , Li Xiaolong ,   School of Aerospace Engineering, Beijing Institute of Technology, Sui Xiangyu ,   School of Aerospace Engineering, Beijing Institute of Technology, Liu Yanming ,   School of Aerospace Engineering, Beijing Institute of Technology, Wang Jianhua ,   School of Aerospace Engineering, Beijing Institute of Technology
Published: October 2024

Rotor-stator interaction has a large impact on the performance of axial compressors. Previous studies have suggested that less blade-row axial spacing (δz) of an axial flow compressor is associated with improved efficiency. However, these studies primarily focused on the subsonic-axial turbomachinery. The impact of δz on the performance in an axial supersonic through-flow fan (STFF) stage remains unclear. This study explores the effect of axial spacing on the performance of an STFF stage using unsteady numerical simulations. The results show that both the total pressure ratio and isentropic efficiency are reduced when axial spacing changes from δz=1.0, whether it increases or decreases. The maximum drop in total pressure ratio and efficiency reaches 2.0% and 1.0% when δz=4.0 and δz=2.0, respectively. Furthermore, the loss production mechanism causing the variation in stage performance is revealed. When axial spacing drops from 1.0 to 0.5, the stage loss dominated by the wake-shock interaction loss is enhanced due to the stronger wake strength. When axial spacing rises from 1.0 to 2.0, however, the wake mixing loss plays a leading role in stage loss. And it is enlarged with the increase of axial spacing because of a larger viscous dissipation.
Broadband interaction noise predictions for an axial compressor stator
Authors:   Université de Sherbrooke, Alguacil Antonio , Lohse Stefanie ,   Leibniz University Hannover, Maroldt Niklas ,   Leibniz University Hannover, Seume Joerg R. ,   Leibniz University Hannover, Moreau Stéphane ,   Université de Sherbrooke
Published: October 2024

The broadband interaction noise of the axial compressor stator-only configuration in the Aeroacoustic Wind Tunnel (AWT) at the Leibniz University Hannover is investigated in this work. Posson’s analytical model, which uses a threedimensional rectilinear cascade response model coupled with an in-duct acoustic analogy for the subsequent acoustic propagation, is employed to estimate the noise from impinging gusts. First, a model validation with experimental results of NASA’s Source Diagnostic Test (SDT) AIAA benchmark is presented. For the subsequent compressor stator investigations, the model inputs are derived from numerical pre-tests using steady RANS simulations. Assuming homogeneous isotropic turbulence, two different models by Liepmann and Von Kármán are applied to calculate the velocity turbulence spectrum and radial correlation length. Finally, the acoustic results are evaluated by comparing the sound power spectra upstream and downstream of the compressor stator vane. The resulting differences can be related to variations in axial velocities and integral turbulent length scale for all four operating conditions. The obtained broadband interaction noise estimations of the test rig serve as a baseline for following experimental noise measurements.
A digital twin-oriented data-physics-AI integrated framework for RUL prediction of gas turbine blade
Authors:   School of Energy and Power Engineering Dalian University of Technology, Guo Yifan , Jiang Xiaomo ,   School of Energy and Power Engineering Dalian University of Technology, Gao Zhiyuan ,   School of Energy and Power Engineering Dalian University of Technology, Wang Zhicheng ,   School of Energy and Power Engineering Dalian University of Technology, Geng Mingzhe ,   School of Energy and Power Engineering Dalian University of Technology
Published: October 2024

As one of the most high-fidelity and high-end turbomachines, gas turbine (GT) has been broadly applied to generate power in various industries such as energy, oil & gas and transportation, because of its unique characteristics of high efficiency, low-emission, and flexible in startup and shutdown. It is often subject to the long-term harsh environment under high pressure, high temperature and high corrosion so that many failure modes like crack, creep, and fouling are inspected in different key components. In the past years predictive maintenance has become a powerful approach to ensure the safety and reliability of a gas turbine, which seamlessly integrates the novel digital technologies such as big data, statistical modeling and artificial intelligence analysis. This paper presents a data-physics-AI integrated framework to predict remaining useful life (RUL) of the gas turbine blade, with the ultimate purpose of digital twin-oriented predictive maintenance of the system. This framework includes data-driven machine learning, physics-based lightweight modeling, and model tuning for fatigue-based RUL prediction of a turbine blade. A comparison study with the tradition methods is conducted to show the advantage of the proposed framework using the data from a real-world gas turbine.
PENGARUH LINGKUNGAN KERJA DAN STRES KERJA TERHADAP TURNOVER INTENTION KARYAWAN PT. MUSTIKA SEMBULUH 1 KOTAWARINGIN TIMUR
Authors: Fitriani Nurul Hidayatul , Mahfudiyanto
Published: October 2024

Penelitian ini bertujuan untuk menganalisis pengaruh lingkungan kerja dan stres kerja terhadap turnover intention karyawan Harvesters PT. Mustika Sembuluh 1 Kotawaringin Timur. Penelitian ini menggunakan metode penelitian kuantitatif. Untuk menjawab dari tujuan penelitian ini, maka data dianalisis dengan menggunakan analisa regresi linier berganda. Untuk mengetahui apakah hipotesis ditolak atau diterimanya hipotesis yang diujikan pada penelitian ini digunakan uji - t dan uji - f. Untuk mengetahui persentase dari variabel dependen yang disebabkan oleh variabel independen maka digunakan koefisien determinasi (R2). Populasi dalam penelitian ini adalah karyawan harvesters PT. Mustika Sembuluh 1 Kotawaringin Timur. Sampel ditentukan dengan menggunakan rumus Slovin dan diperoleh 74 responden sebagai sampel. Hasil penelitian menunjukkan bahwa: (1) lingkungan kerja berpengaruh positif dan signifikan terhadap turnover intention (2) stres kerja berpengaruh positif dan signifikan terhadap turnover intention (3) lingkungan kerja dan stres kerja secara simultan berpengaruh terhadap turnover intention.
Propaganda by Proxy: How Autocrats Use Surrogates to Conceal Their Control of the Media
Authors: Rahmani Bardia
Published: October 2024

Autocrats use the media to generate popular support, yet individuals opposed to the regime tend to distrust and avoid state-owned sources. How do autocrats reach these skeptical actors? In this paper, I examine a strategy in which autocrats control private media outlets through proxies, thereby concealing these outlets' connections to the government and rendering them more credible to regime opponents. Fielding surveys in four Sub-Saharan African countries, I find that the vast majority of citizens living in autocracies are unable to identify which private outlets are owned by regime proxies. I then present evidence from a series of field experiments showing that concealed ownership works: it makes opponents more likely to consume regime-controlled news sources and more likely to be persuaded by their pro-regime coverage. These results challenge the notion that propaganda only influences an autocrat's loyal supporters, pointing to conditions under which it reaches and persuades more discerning audiences.
Multifocal contact lenses. Easy fitting algorithm and new possibilities in presbyopia correction with TOTAL30 Multifocal
Authors: Zakharova O. A. , Napalkova S. E. , Gladkov T. V.
Published: October 2024

Multifocal soft contact lenses are the fastest growth segment in contact lenses. While presbyopic patients demonstrate an increasing interest in contact lenses, not all practitioners actively integrate multifocal lenses into their practices. Some of the reasons include the perception that multifocal fitting is time-consuming and chances of successful adaptation of “ageing” patients are low. The purpose of this publication is to provide an overview of the latest multifocal contact lens, essential fitting steps and instruments for quick and effective multifocal lens fitting.
The association of coronary artery disease with heart rate at anaerobic threshold and respiratory compensatory point
Authors: Kong Yiya , Shen Ruihuan , Xu Tao , Zhou Jihong , Xia Chenxi , Zou Tong , Wang Fang
Published: October 2024

Background

There is limited knowledge regarding the association between heart rate (HR) during different exercise phases and coronary artery disease (CAD). This study aimed to evaluate the relationship between four exercise-related HR metrics detected by cardiopulmonary exercise testing (CPET) and CAD. These metrics include HR at the anaerobic threshold (HRAT), HR at respiratory compensatory point (HRRCP), maximal HR (HRmax), and HR 60 s post-exercise (HRRec60s).

Methods

The 705 participants included 383 with CAD and 322 without CAD in Beijing Hospital, who underwent CPET between January 2021 and December 2022. The Logistic regression analysis was applied to estimate the odds ratio and the 95% confidence interval. Additionally, the multivariable Logistic regression analyses with restricted cubic splines were conducted to characterize the dose-response association and explore whether the relationship was linear or nonlinear.

Results

Our primary finding indicates that for each one-beat increase in HRAT, there is a 2.8% reduction in the adjusted risk of CAD in the general population. Similarly, a one-beat increase in HRRCP corresponds to a 2.6% reduction in the adjusted risk of CAD. Subgroup analyses revealed significant interactions between HRAT and factors such as sex, hypertension, and lung cancer, as well as between HRRCP and sex and hypertension, in relation to CAD. The dose-response analysis further confirmed that higher HRAT and HRRCP are associated with a reduced risk of CAD.

Conclusion

These results are suggestive of a good association between HRAT, HRRCP, and CAD. The lower HRAT, and HRRCP are signs of poor HR response to exercise in CAD. HRAT and HRRCP are potentially good indicators of poor HR response to exercise without considering maximal effort.
Evaluating technology breaks on cell phone use in a college classroom
Authors: Redner Ryan , Hurtado-Parrado Camilo , Cifuentes Julian , Shawler Lesley A. , Jacobs Eric A.
Published: October 2024

Cell phones in the college classroom can be used to increase interaction between students and the professor; they can also distract from academic tasks and decrease academic performance. To decrease task-switching in the classroom, researchers have suggested the use of “technology breaks” (TB), in which students are provided periodic breaks to use cell phones throughout class. The purpose of the present study was to evaluate the use of technology breaks in a college classroom (N = 21). Cell phone use was evaluated over 22 class periods. Observers recorded how many students were using cell phones every 10 s. Three experiment conditions were alternated with yoked controls in a multi-element design: (A) 1 min technology breaks, (B) 2 min technology break, and (C) 4 min technology break. The control condition [question breaks, (QB)] provided breaks for students to ask the professor questions regarding class materials. No penalties or punishers were delivered for cell phone use under any conditions. The average rate of cellphone use in QB was 0.53 responses per min (range = 0.06–1.02), while the average rate for TB was 0.35 responses per min (range = 0.20–0.74). Overall, the study found that technology breaks were a promising way to utilize reinforcement-based strategies to reduce classroom cell phone use, though variability in the data weakened conclusions regarding the utility of technology breaks.
Genetic predisposition to thyrotoxicosis and onset of knee osteoarthritis
Authors: He Zhiyi , Gong Zailing , Jiao Sizhe , Xiong Wei , Hao Xiaoxia , Cui Jiarui , Zhang Jiaming
Published: October 2024

Objective

Thyroid hormones have actions on cartilage, whereas the association between thyroid hormone related diseases and osteoarthritis (OA) are unclear. This study aims to investigate the association between thyrotoxicosis and OA.

Methods

Summary-level genetic data of thyrotoxicosis were obtained from FinnGen cohorts (nCase = 10,569, nControl = 762,037). Summary-level data of OA were obtained from a large-scale genome-wide association study of UK Biobank (nCase = 40,659, nControl = 756,338). Single nucleotide polymorphisms (SNPs) robustly associated with thyrotoxicosis or OA were used as genetic instruments. A two-sample bidirectional Mendelian randomization (MR) analysis was designed to assess the effect of genetic predisposition of thyrotoxicosis on OA risk, as well as the reverse their relationship. The causal effect was estimated by Inverse-variance weighted method, with weighted median and MR-Egger as supplementary methods.

Results

Genetic predisposition of thyrotoxicosis was associated with the onset of knee OA (autoimmune hyperthyroidism: odds ratio [OR]: 1.05, 95% confidence interval [CI]: 1.03-1.07, FDR < 0.001; thyrotoxicosis: OR: 1.05, 95% CI: 1.02-1.08, FDR = 0.016; thyrotoxicosis with diffuse goitre: OR: 1.04, 95% CI: 1.02-1.07, FDR = 0.003; other and/or unspecified thyrotoxicosis: OR: 1.05, 95% CI: 1.02-1.09, FDR = 0.003), whereas thyrotoxicosis was not associated with hip OA. In reverse MR analysis, genetic predisposition to OA was not associated with thyrotoxicosis. No pleiotropy was identified in the MR analyses. Sensitivity analyses indicated the robustness of the MR estimates.

Conclusion

This study provides MR evidence supporting causal association of thyrotoxicosis with knee OA in European population, whereas OA may have no causal effects on thyrotoxicosis.
Saturation association between serum 25-hydroxyvitamin D levels and mortality in elderly people with hyperlipidemia: a population-based study from the NHANES (2001-2016)
Authors: Pan Guang-hui , Zhang Jun-qing , Sun Yi-yan , Shi Yue-hui , Zhang Fa-rong
Published: October 2024

Background

25-hydroxyvitamin D is the body’s main storage form of vitamin D and is internationally recognized as the best indicator of vitamin D status in the human body. There is a scarcity of research investigating the interrelationship between serum 25-hydroxyvitamin D (25(OH)D) levels and mortality among elderly individuals with hyperlipidemia. To address this knowledge gap, we examined the association between serum 25(OH)D levels and mortality in an older hyperlipidemic population from NHANES, while controlling for other influential factors. The study sought to elucidate the correlation between serum 25(OH)D levels and mortality about all-cause mortality, cardiovascular disease (CVD), malignant neoplasms, and mortality from other causes.

Methods

The data from NHANES 2001-2016, including 9,271 participants were analyzed to examine the association between serum 25(OH)D levels and mortality. The interrelationship was illustrated using Kaplan-Meier curves and restricted cubic splines, while the Cox proportional hazards model was utilized to estimate the multifactor adjusted hazard ratio (HR).

Results

This study included 9,271 participants (43.28% male) with an average age of 69.58 years, and the average duration of participant follow-up was 88.37 months. Kaplan-Meier curves demonstrated that lower serum 25(OH)D levels were associated with increased risks of all-cause mortality, cardiovascular mortality, malignant neoplasm mortality, and mortality from other causes. This negative association was further confirmed by the Cox proportional hazards models. Additionally, restricted cubic splines not only revealed this negative association but also highlighted the saturated serum 25(OH)D levels. Moreover, subgroup analyses indicated that the inverse correlation between serum 25(OH)D levels and all-cause mortality was more pronounced in the non-obese and smoking population. And the inverse correlation with mortality from other causes was even stronger in the non-obese population.

Conclusions

In the elderly population with hyperlipidemia, 25(OH)D serum levels were negatively correlated with both cause-specific mortality and all-cause mortality. Moreover, there was a threshold effect in this negative association.
Spatial patterns and its influencing factors on villages around the Ji-shape bend of the Yellow River
Authors: Wang Zhiqiang , Jiang Shuang , Xu Shuang , Zhang Jianxun , Mumtaz Faisal , Zhang Maomao
Published: October 2024

Population migration brings about many problems in villages. The Ji (几)-shape bend of the Yellow River is an important ecological sensitivity study area, and some progress exists in the study of villages, still has many problems. This article addresses the inadequacy of the existing research and mainly solves the problems in three areas. It primarily used the research method of Arc GIS10.8, the big data research methods such as imbalance index, Gini coefficient, geographic concentration index, Geodetector, and other methods were used, laying the groundwork for additional analysis of various factors. Hence, the subsequent study findings were attained. 1) The distribution pattern in the village system around the Ji-shape bend of the Yellow River seems to be a positive spatial correlation, with the characteristics of random distribution, uneven spatial distribution, and low concentration, with Hohhot-Baotou serving as a center. 2) Natural factors are the most important factors in the distribution of villages. 3) Among the natural factors, elevation (0.244619), the value of slope (0.319805), and the aspect of slope (0.074089) appear to be the strongest explanatory power. Among the social factors, the rate of urbanization (0.019082), highway density (0.019082), and percentage of tertiary industry (0.018422) show the strongest explanatory power on socioeconomic factors. The natural and social characteristics of villages are important for the siting of villages. This paper put forward some suggestions for the protection and development of villages in ecologically sensitive areas.
Analysis of rare genetic variants in All of Us cohort patients with common variable immunodeficiency
Authors: von Beck Troy , Patel Meera , Patel Niraj C. , Jacob Joshy
Published: October 2024

Common variable immunodeficiency (CVID) is a group of genetic disorders involving more than a dozen genetic loci and characterized by a deficiency in specific antibody isotypes leading to poor immune responses and recurrent infection. CVID affects approximately 1 in 10,000 to 1 in 50,000 people worldwide with substantial heterogeneity in disease severity, including asymptomatic individuals designated as hypogammaglobulinemia of undetermined significance (HGUS). As expected of humoral immunodeficiency, the molecular causes of CVID primarily affect the maturation, activation, or survival of B cells and plasma cells. In this retrospective analysis, we defined a cohort of 21 patients with a primary CVID or HGUS diagnosis in the v7 release of the All of Us Research Program database and performed gene annotation and variant effect prediction. Our analysis identified both known disease-causing variants and rare genetic variants overlapping with other immunodeficiency syndromes.
The modified artificial cohort method for three dominant pelagic copepods in the northern North Pacific revealed species-specific differences in the optimum temperature
Authors: Teraoka Takumi , Nagao Shuya , Matsuno Kohei , Yamaguchi Atsushi
Published: October 2024

The most concerning recent ocean changes in temperature issues are known as marine heat waves. Under these conditions, it is important to evaluate the effects of temperature on zooplankton. In this study, we investigated the growth rates of three dominant copepod species (Eucalanus bungii, Metridia pacifica, and Neocalanus plumchrus) in the northern North Pacific under three different temperature conditions (3, 7, and 11°C) using an artificial cohort method. Experimental conditions for 42 hour incubations were set to light intensity and photoperiod corresponding to 50 m depth. The dissolved oxygen solubility after rearing ranged from 69.2% to 102.1%, suggesting sufficient conditions for copepod growth. Chlorophyll a increased in 83% of the experiments, indicating that the food conditions were sufficient for the copepods. The mean proportion of dead specimens evaluated using neutral red was 10.2%, corresponding with the reported values in the field. Thus, it can be concluded that the laboratory-rearing conditions used in this study provided sufficient food, and the only effect evaluated would be that of the three different temperatures. Since the developmental time for each stage is longer than the rearing period, it is important to conduct experiments with a large number of individuals to obtain accurate growth rate results. The specific growth rates of E. bungii and M. pacifica increased with increasing temperature. In contrast, N. plumchrus showed the highest growth rate under moderate water temperature conditions. In terms of weight units (dry, carbon, and nitrogen), the carbon weight-specific growth rates were higher than those of the other two units, a common characteristic of the three species. This reflected lipid accumulation during the late copepodite stages. The interspecies differences in growth rate responses to water temperature reflect species-specific differences in temperature tolerance or the optimum temperature for each species. As E. bungii and M. pacifica reproduce near the surface layer through income breeding, their temperature tolerance or optimum temperature is expected to be high. However, because the reproduction of N. plumchrus occurs in the cold deep layer by using capital breeding, its temperature tolerance and optimum temperature would be lower than those of the former two species.
Coastline target detection based on UAV hyperspectral remote sensing images
Authors: Zhao Song , Lv Yali , Zhao Xiaobin , Wang Jiayao , Li Wei , Lv Ming
Published: October 2024

Timely and accurate monitoring of typical coastal targets using remote sensing technology is crucial for maintaining marine ecological stability. Hyperspectral target detection technology proves to be an effective tool in extracting various typical materials along the coastline. Traditional target detection methods using spectral domain information can effectively retain the intrinsic properties of the material. However, it is difficult to effectively recognize targets in homogeneous regions by using only spectral domain information, which may lead to insufficient utilization of spatial information. In this study, a detector based on signal-to-noise ratio fusion constrained energy minimization with low-rank sparse decomposition (SFLRSD) is proposed. This detector improves the separability of background and target by obtaining spatial domain information from hyperspectral images and fusing spectral domain information. First, total variation regularization and fractional Fourier transform are applied to process spatial and spectral domain information, respectively. The constrained energy minimization (CEM) detector is used to improve the separability between the target and background of the processed data. Then, the background and anomalies are represented as low-rank and sparse components, respectively, using low-rank sparse matrix factorization. This transforms the model solution into a covariance matrix problem, which is then solved using marginal distance difference (MDD) to isolate anomalous parts. Subsequently, the anomaly parts are fused with CEM detector results, weighted by their respective signal-to-noise ratios. This detection model leverages unified hyperspectral image features, enhancing spectral discreteness of anomalous targets and backgrounds. Finally, experiments on custom created hyperspectral dataset show that the proposed method outperforms other baseline methods in terms of visualization and quantitative performance. In this paper, we not only propose a new hyperspectral target detection method, but we also collect three typical marine litter of different materials by means of airborne hyperspectral remote sensing and construct four hyperspectral datasets in a real environment. All the simulation experiments in this paper are conducted in these four datasets.
The clinical characteristics and genotype analysis of LAMB2 gene mutation
Authors: Li Guangbo , Su Dequan , Liu Cuihua , Cao Guanghai , Zhan Zhuqin , Liao Jianying
Published: October 2024

Purpose

To report a case of steroid-resistant nephrotic syndrome caused by a LAMB2 gene mutation, examine the associated literature, outline the clinical and genetic features of Pierson syndrome, and deepen the clinical comprehension of this condition.

Method

The study involved retrospective summary and analysis of the clinical presentations, genetic mutation features, and prognosis of one case involving a LAMB2 gene mutation. PubMed, Medline, Web of Science, CNKI, and Wanfang databases were searched to gather and summarize information on the pathological phenotypes and genotypic alterations associated with LAMB2 mutations.

Result

A 9-month-old infant presented with edema and massive proteinuria, along with horizontal nystagmus and miosis, manifesting clinically as steroid-resistant nephrotic syndrome. Ocular symptoms prompted both a kidney biopsy and genetic testing. The biopsy revealed minimal change disease, while genetic testing identified compound heterozygous mutations in the LAMB2 gene: c.1405C > T (p.R469X) and c.1066 T > A (p.C356S), inherited from the father and mother, respectively. These mutations were determined to be novel. The diagnosis was confirmed as a LAMB2 gene mutation. A literature review of 26 cases with LAMB2 mutations indicated these typically presented as steroid-resistant or congenital nephrotic syndrome, with 14 cases also displaying ocular symptoms. Among the 18 cases undergoing kidney biopsy, findings included focal segmental glomerulosclerosis in 10 cases, minimal change disease in 4 cases, diffuse mesangial sclerosis in 2 cases, IgM nephropathy in 1 case, and mesangial proliferation in 1 case. Electron microscopy in 10 cases showed basement membrane splitting. Genetic analysis revealed 15 cases with compound heterozygous mutations, 5 with homozygous mutations, 3 with heterozygous mutations, 2 with frame-shift mutations, and 1 with a truncating mutation. 16 out of the 26 reported cases progressed to end-stage kidney disease.

Conclusion

Mutations in the LAMB2 gene primarily manifest as steroid-resistant or congenital nephrotic syndrome, often accompanied by ocular abnormalities, suggesting a strong likelihood of this disease. The results of genetic testing offer a foundational basis for clinical diagnosis. The identification of a new mutation site in this case expands the known spectrum of mutations in the LAMB2 gene. Unfortunately, the prognosis associated with this condition is generally poor.