bluuebunny/crossref_metadata_2025 huggingface dataset:
Çalışanların İş Becerileri ile Örgütsel Yaratıcılık Arasındaki İlişkinin Niteliksel Rolü; Havacılık Sektöründe Bir Uygulama
Authors: Türk Abdullah
Published: July 2024

Günümüzde yoğun rekabet ortamında bulunan işletmeler için farklılaşan yetkinleri öne çıkmak zorundadır. Özellikle insan ilişkilerinin önemli olduğu katma değeri yüksek iş kollarında çalışanların ortaya koyduğu yenilikçi fikirlere çok ihtiyaç duyulmaktadır. Çalışanların bireysel becerileriyle doğrudan ilişkili olan yenilikçi fikir üretiminin sürdürülmesi ise organizasyon düzeyinde kültür destekli bir ekosisteme ihtiyaç duymaktadır. Bu nedenle kişilerin kendi işleri üzerindeki özerklik derecesi ile ilişkili olan iş becerikliği kavaramı ile organizasyonun yüksek katma değerli hizmet üretimiyle yeni ve yaratıcı çözümleri önceleyen örgütsel yaratıcılık ilişkisini anlamak önemli görülmektedir. Bu bakış açısını benimseyen çalışmanın amacı; organizasyon düzeyinde çalışanların iş becerikliği ile genel toplamda örgütsel yaratıcılık arasındaki rolleri anlamaktır. Örgütsel düzeyde yaratıcılığın öne çıkarılmasında çalışanların iş becerikliğine verilen önemin sosyal etkisi ve çalışanın bu yöndeki beklentisinin gizil rollerine odaklanan bu araştırmada nitel analiz yöntemi kullanılmıştır. Maxqda 22 programının kullanıldığı çalışmada derinlemesine görüşmeler sonucunda elde edilen veriler kavramsal olarak kodlanmış ve içerik analizi yapılmıştır. Araştırma havacılık sektöründe orta-üst düzey hem yöneten hem de yönetilen profesyonellerle yapılan odak grup görüşmeleriyle gerçekleştirilmiştir. Analiz sonucunda elde edilen parçaların bağlantı ilişkisi yapılandırma yönüne göre aktarılmıştır. Araştırma bulguları çalışanların iş becerikleri ile örgütsel yaratıcılık arasındaki ilişkisinde; "destek ve performans", "yenilikçilik ve esneklik", "inisiyatif ve dinamizm" ve son olarak "dinamizm ve yenilikçilik" arasında rol ilişkilerini öne çıkarmıştır. Araştırmadan elde edilen pratik sonuçlar; İş becerikliği kullanım kapasitesi örgütsel destek ile ilişkilendirilmekte çalışanın uzmanlık alanındaki inisiyatif gücü yenilikçi performans ile ilişkilendirilmiş toplamda örgütsel düzeyde bir yaratıcılık kapasitesi artışı ve yenilikçi davranış ortaya çıktığı tespit edilmiştir.
Performans Değerlendirmeli Opsiyon Sözleşmeleri (PDOS) Modelinin Türkiye’de Uygulanabilirliği: Kamu Tedarik Sistemine Entegrasyonu Üzerine Derinlikli Görüşme Araştırması
Authors: Kumral Abdullah Arif
Published: July 2024

Son yıllarda kamu alımları ve dış kaynak kullanımında, uzun süreli sözleşmelere yönelimin belirginleştiği görülmektedir. Uzun süreli sözleşme modelleri olarak Avrupa Birliği (AB) ülkelerinde “çerçeve sözleşmeler,” ABD’de ise “opsiyon sözleşmeleri” uygulanmaktadır. Türkiye’de her iki modelin etkin olarak uygulanamaması nedeniyle, kamu tedarik faaliyetlerinde belirgin ölçülerde tasarruf sağlama imkânları kısıtlanmaktadır. Derinlikli-görüşme yöntemi kullanılarak gerçekleştirilen araştırmada, çok yıllı sözleşme yapma aracı olarak Performans Değerlendirmeli Opsiyon Sözleşmeleri (PDOS) modelinin Türkiye’de uygulanabilirliği incelenmiştir. Derinlikli- görüşme gerçekleştirilen 20 uzman personelin %95’i PDOS modelinin uygulanabilir ve maliyet-etkin bir tedarik yaklaşımı olabileceğini belirtmiştir. Çerçeve Anlaşmalar ve Çok Yıllı Sözleşmeler ile ilgili olarak; çerçeve anlaşmaların ve çok yıllı sözleşmelerin pratikte uygulanmamasının nedenleri, uygulanması durumunda ortaya çıkan avantajlar ve dezavantajlar ile uygulanma gerekliliği olmak üzere dört tema elde edilmiştir. Önerilen PDOS Modeli ile ilgili olarak; PDOS Modelinin uygulanabilme durumu, avantajları, sakıncaları, risk ve tedarik birim fiyatlarına etkisi, sözleşmelerin 3 yıl olması durumunda ortaya çıkan sorunlar ile sözleşme süresinin uzunluğu temaları olmak üzere 7 tema elde edilmiştir. Araştırma sonucunda, önerilen PDOS modelinin Türkiye kamu tedarik sisteminde uzun süreli sözleşme yapma ihtiyacına yönelik, etkili ve verimli bir sözleşme yöntemi olabileceği yönünde çalışmada elde edilen bulgular dikkate alındığında, PDOS modelinin kamu tedarik sistemine bir sözleşme yöntemi ve yönetişim yaklaşımı olarak entegre edilmesinin ülke ekonomisi, kamu idareleri ve özel sektör firmaları açısından yararlı olabileceği değerlendirilmektedir.
Mesleki Eğitim Uygulamasında Öğrenci/Kurum Memnuniyetini Etkileyen Faktörlerin İncelenmesi (3+1 İme Sistemine Yönelik Bir Değerlendirme)
Authors: Ölmez Mehmet
Published: July 2024

Bu çalışma ile Türkiye’de son on yıl içerisinde, meslek yüksekokullarının uygulama sistemlerinde yaşanan değişimler araştırılmıştır. Ulusal ve uluslararası alan yazın taranarak öğrenci/kurum memnuniyeti ile ilgili çalışmalar incelenmiş ve yükseköğretim kurumlarında öğrenci memnuniyetini etkileyen değişkenler belirlenmiştir. Yapılan alan yazın sonucunda meslek yüksekokullarının teorik bilgileri uygulamalı eğitimle yeterince desteklemediği için öğrencilerin mezuniyet sonrası istihdam edilmede ve yeterli mesleki ve teknik bilgi kazanmalarında sorun yaşadığı görülmüştür. Sorunu çözmek adına son yıllarda yeni bir uygulamalı eğitim modeli olan “3+1 İşletmede Mesleki Eğitim Uygulaması (İME)” bazı meslek yüksekokullarında pilot çalışma olarak kullanılmaya başlanmış ve başarılı olmuştur. İME uygulaması ile 3 dönem okulda teorik ders alan öğrenci 1 dönem boyunca işletmede İME uygulamasına katılmıştır. Yapılan bu çalışma ile İME uygulamasını yaklaşık dört yıldır devam ettiren İnönü Üniversitesi OSB MYO öğrencilerinin/kurumların bu modelden memnuniyet durumlarını ölçmek amaçlanmıştır. İnönü Üniversitesi OSB MYO 2023-2024 güz ve bahar eğitim dönemi içerisinde 230 öğrenci ve 230 işletme yöneticilerinin katıldığı toplamda 460 kişi ile yüz yüze anket yöntemi uygulanmıştır. SPSS 26 programı ile anketlerin veri girişleri yapılmış ve katılımcıların İME uygulamasından memnuniyet unsurları incelenmiş ve öğrenci/işletme memnuniyet durumlarının geliştirilmesi için önerilerde bulunulmuştur. Yapılan çalışmada İME uygulamasındaki memnuniyetin istihdama etkisinin yüksek olduğu görülmüştür. Öğrencilerin İME uygulamasından memnuniyet durumlarının iş teklifini kabul etme durumlarını %98 olumlu etkilediği görülmektedir.
Kendini Gerçekleştiren Kehanet Olgusu: Akademisyenlerin Çalışma Ortamındaki İzlenimleri Üzerine Nitel Bir Araştırma
Authors: Mendi Yahya , Orhan Ufuk
Published: July 2024

Araştırmanın amacı, akademisyenlerin kendini gerçekleştiren kehanete ilişkin izlenimlerini detayları ile ortaya koymaktır. Araştırmanın deseni olgu bilim olarak tasarlanmıştır. Araştırmanın örneklemini Van Yüzüncü Yıl Üniversitesinde çalışan ve kasıtlı örneklem tekniği ile seçilen akademisyenler oluşturmaktadır. Araştırmanın akademisyenler arasında kendini gerçekleştiren kehanetin oluşumuna dair sebep, süreç ya da sonuçlara ilişkin detayları ortaya çıkartarak okuyuculara katkı sağlaması amaçlanmıştır. Araştırmadaki veriler yarı yapılandırılmış görüşme formu ile toplanarak nitel içerik analiz yöntemi ile değerlendirilmiştir. Araştırma bulguları sekiz tema şeklinde ortaya konulmuştur. Bulgulanan temalar arasında; performans ve sorumluluk bilinci, bireysel kapasite öz yeterlilik ve performansa dayalı liyakat, öğrenmeye açık olma ve kendini geliştirme arzusu, işsizlik ve amaç noksanlığı, nepotizm (kayırmacılık), akademisyen olma arzusu, şımarma ihtimali ve yaş değişkenleri yer almaktadır. En fazla bulgulanan temalar performans ve sorumluluk bilinci ile bireysel kapasite öz yeterlilik ve performansa dayalı liyakat, en az bulgulanan tema ise akademisyen olma isteğidir. Beklenti etkilerinin akademik başarılar üzerindeki etkisine ait mekanizmaya dair bütüncül ve derinlemesine bir anlayış geliştirmek nitel araştırmalar yoluyla mümkün olabilecektir. Bu bağlamda araştırma kapsamında elde edilen bulguların akademik performansını iyileştirmek adına beklenti etkilerine ilişkin müdahalelerinin etkisini en üst düzeye çıkarma amacıyla yeni yöntem ve yollar bulunmasına olanak sağlayacağı öngörülmektedir. Araştırmanın etkiye dair sürecin aydınlatılmasına katkı sağlayacağı düşünülmektedir. Ayrıca bulguların alan yazınına katkı sunacağı umulmaktadır.
The effect of text-messaging on the utilisation of health facilities among pregnant women during delivery in Cross River State, Nigeria
Authors: Emeka Chisom , Agbede Catherine
Published: July 2024

Objective: Uptake of skilled care during delivery is associated with positive maternal and neonatal health outcomes. Studies reveal Nigeria accounts for a significant percentage of global maternal deaths, which have been associated with poor skilled attendants at delivery. Text messaging has proven to be effective in promoting health facilities’ utilisation in Nigeria. Therefore, this research assessed the influence of text messaging intervention on the utilisation of health facilities during delivery in Cross River State
Methods: Quasi-experimental research design was employed.  A sample size of thirty per LGA in two LGAs was used. Participants were purposively selected and grouped into text messaging and Control Groups ). The experimental group received text briefs three times per week for four weeks, while the control group received regular ANC sessions. A structured and validated questionnaire with Cronbach’s alpha coefficients ranging from 0.76 to 0.81 was used for data collection. Data were analyzed using descriptive and inferential statistics at a 5% level of significance.
Results: At baseline, the proportion of women who utilised HFs during delivery was 13.3% (experimental group) and 33.3% (control group). Furthermore, at the 8th-week follow-up, there was a significant difference (p < 0.05) in T-M (76.7%), compared with CG (33.3%) with an increase of 63.4% for the T-M compared to CG (3.3%, p > 0.05).
Conclusion: T-M intervention improved the utilisation of HFs during delivery among PW. The study recommends that health workers should incorporate mobile T-M intervention strategy which has proven to be a useful tool during ANC.
The effect of a health education programme on Tuberculosis infection prevention and control practices among HIV-positive patients at three tertiary hospitals in Ogun state, southwest Nigeria
Authors: Nwankwo Nkechinyere Victoria , Adeniran Adelere Ezekiel , Uwalaka Chiamaka , Adeyemi Oluwatosin , Adefala Ngozi
Published: July 2024

Objective: This research evaluated the impact of a peer-support health education programme on tuberculosis infection prevention and control practices among HIV-positive patients receiving anti-retroviral therapy (ART) in a tertiary hospital.
Methods: A quasi-experimental design was used for this study. Forty respondents were randomly selected between January and April 2023. Two tertiary health institutions in Ogun State, Nigeria with Direct Observation Treatment Shortcut programme were purposively selected. Systematic sampling was used to select the participants from the selected facilities and they were grouped into one experimental group (EG) and one control Group (CG). The intervention was implemented for six weeks and data were collected at baseline, immediate post-intervention and at 12th-week follow-up. 
Results: At the 12th-week follow-up, the peer-supported health education intervention had a significant effect (t78=14.21, effect size =3.09, p <0.05) on the Intervention Group with a mean score (X̅) of 6.85±0.86 compared to the Control Group (CG) with a mean score (X̅) of 3.95±0.96. Furthermore, among the Intervention Group, there is a significant difference (t39=19.0, effect size =3.06, p <0.05) in the effect of the peer-supported health education intervention program on TB infection prevention practices of participants at baseline (X̅ =3.98±0.73) and also at 12th weeks follow-up (X̅ =6.90±0.71).
Conclusion: There was a significant association between the intervention and improvement in TB infection prevention and control practices. More focus should be placed on peer-supported health education TB prevention interventions among HIV patients. Also, the National Tuberculosis Control Programme should adopt peer-supported health education interventions to improve prevention practices.
Association Between Gender and Depression Among College Students
Authors: Sud Shonali , Sharma Lakshay , Kaur Jaswinder , Chauhan Urmila
Published: July 2024

The mental health of students is a critical factor for their academic success and achievements . Mental health experts address this matter in schools , colleges and communities to enable individuals in need of preventive and treatment program . Depression affects people of all ages, however it also has an adverse effect on kids and teenagers. This study conducted on depression among educational Undergraduate college students of Solan district from Himachal Pradesh India. Previous studies have shown that the anxiety and depression have an important role in academic achievement of students in respect of their gender. This study is designed to identify the impact of gender on non depressive and depressive college students.The results showed out of 200 sample of college students , 94 ( 53 females and 41 males) were non depression and 106 (47 females and 59 males) were from depression, having significant association with their gender with chi square value 2.89(p<.10). Researcher findings have significant implications for the field of education.
Environmental Sanitation – A Therapy for Healthy Living for Sustainable Development. A Case Study of Argungu Township Kebbi State, North Western Nigeria
Authors: Muhammad Abdullahi
Published: July 2024

Environmental sanitation is the principle and practice of creating healthful and hygienic conditions in the environment to promote public health and welfare, improve quality of life and ensure a sustainable environment. However, environmental sanitation which remains a catalyst for achieving healthy living has been neglected in most developing countries. In Nigeria, it is common to see people defecating in the open. The ugly side of this is that street gutters are left untidy and filled with dirt, and marketplaces are covered with waste and discarded items. Worrisomely, the story remains the same in rural places where there is hardly any proper waste management technology. All types of waste are dumped into nearby bushes and forests while human faeces are discharged into streams and rivers from which people obtain their water. This is what motivated the researchers to investigate the level of sanitation in Argungu Township in Kebbi State. Data for this study was collected through a structured al interviewing method. The total number of households in five (5) metropolitan wards as contained in the national immunization house listing schedule is 16, 594. However, a systematic sampling method was applied to arrive at the sample. After every count of fifty households, one household was selected making a total of 313 households for the research. The study revealed that people have neglected the sanitation of their environment. In Conclusion, the study recommends the use of a community participation model of sanitation which outlines the role expected by each individual toward ensuring a free and hygienic environment.
Appraisal of Students Admission on Service Delivery in the Directorate of Undergraduate Studies (DUS) Federal College of Education (FCE), Yola
Authors: M. Mubi Hasan , Ogochukwu Dike Chinyere , Bello Maigari Haruna , Abdulrasheed Yahaya , Dahiru Lami
Published: July 2024

Establishment of relationship between policy issues and service delivery in tertiary institution of learning requires to encourage policy implementations to relate to policy formulation that would address rather than dismal service delivery in tertiary educational institutions across the country. Precisely the research intends to establish if policy issues on students’ admission affect service delivery in DUS FCE, Yola. The main instruments used for data collection were the Questionnaires, Focus Group Discussion (FGD), observation check list and Semi Structured Interview (SSI) formats. This paper proposes Analysis of Variance (ANOVA) test statistic as a measurement tool for the study. The findings show that consideration of only first choice for JAMB Admission affect students intake in DUS and cut off marks for admission into DUS poses a threat to intake in some programmes. Post JAMB screening of applicants ensures selection of better candidates. Also, clearly stated memorandum of understanding (MoU) with portal managers and memorandum of understanding (MoU) with ICT facility managers would enhance service delivery in DUS. The study recommends that admission guidelines/policies of regulatory bodies like JAMB and affiliate institution need to be carefully studied and regularly incorporated in the students’ guide book.
Transforming Urban Resilience: Innovative Approaches to Stormwater Management
Authors: Kumar Munish , Kumar Verma Raj , Sharma Abhay
Published: July 2024

Metropolitan storm water for executive is a major problem aggravate by fast urbanization and environmental change. Conservative strategies usually miss the mark in care for to the expanded volume and infection of storm water spillover; require imaginative answers to upgrade urban strength. The assess digs into green framework stipulation, like green rooftops, porous asphalts, and bioswales, which duplicate regular cycles to ingest and channel storm water. additionally, it analyzes progressed representative procedures and savvy advancements, including incessant observing frameworks and prophetic assessment, which streamline storm water framework execution. Through a combine of related analyses and exploration discoveries, the paper evaluates the financial and ecological reward of these imaginative works by feature their part in decreasing flood chances, more developing water quality, and improving urban green spaces. By giving a far successsketch of cutting edge storm water the board rehearses, this paper expects to light upthe policymakers, urbanplanner, and civil engineer about powerful systems for building stronger and reasonable urban conditions.
Evaluation of Sexual Transmitted Infections among Gender based Violence Cases: Retrospective Cross Sectional Study, Kigali-Rwanda
Authors: Uwumuremyi Fabrice , Bisanukuri Evergiste , Usengimana Angelique , Berchmas Mutijima Jean , Hitimana Enias , Nemeyimana Patrick , Nyirakwezi Jeanette , Arinaitwe Aprinal
Published: July 2024

Background: STIs are infections that are passed from one person to another through sexual contact. The causes of STIs are bacteria, parasites, yeast, and viruses. There are more than 20 types of STIs, including Chlamydia, genital herpes, gonorrhea, HIV/AIDS, HPV, Syphilis and Trichomonas1 . According to WHO (2013), Amin and Garcia presented the evidence of the increased risk of STIs and HIV associated with GBV; and looks at potential pathways by which gender-based violence and STI and HIV are linked2 . GBV is defined by the UN in the CEDAW as any act that is likely to or results in physical, sexual or psychological harm or suffering to women including threats or acts of coercion, arbitrary deprivation of liberty, private or public, in the family or community2,15 . The aim of this study was to determine the prevalence of STIs among GBV cases attending Isange one stop center in Kibagabaga District Hospital.  Method: This study was retrospective conducted from January 2017 to September 2019 among GBV cases attending Isange one stop center in Kibagabaga District Hospital. Request forms describing the GBV case and indicating the demographic parameters and laboratory findings of the victim was evaluated. Data was analyzed using Microsoft Excel and SPSS version 16.0.  Result: In total 320 cases for GBV cases was reported from 2017 up to November, 2019 at Isange One Stop Center in Kibagabaga District Hospital. 100% of study population was female, majority of them 96.25% (308) were young female adolescent in the range of 10 to 19 years old. Considering laboratory findings, this study showed that Only 5% of all GBV cases within period of 3 years reported STIs negative, Majority GBV cases reported pregnancy at high level 72% and the overall Prevalence of STIs was 23% all GBV cases. 7.2% of these had HIV and 6.8% had Hepatitis B virus. The prevalence of trichomonas and Syphilis was 4% and 5% of all GBV cases respectively and this study showed no HPV and Gonorrhea cases has been reported.  Conclusion: Although the proven steps that have been taken by government of Rwanda to against GBV, but not understood as desired because GBV cases continue to increase periodical, so more Strength and focus are needed to reduce this rate GBV among young female adolescents. According to this study finding which suggested that GBV cases promote STIs and unwanted pregnancy.
Advancements in Fused Deposition Modeling for Aerospace: Optimizing Lightweight and High- Strength Components
Authors: Tarun Dittakavi , Sundar K Syam , Kishor Kumar K Ch , Vardhan S Anand , Sai Durga Prasad P Sri Pavan
Published: July 2024

Fused Deposition Modeling (FDM) has emerged as a pivotal technology in aerospace manufacturing, enabling the creation of lightweight and high-strength components. Recent advancements in FDM materials, process optimization, and design methodologies have significantly enhanced its applicability in producing aerospace parts that meet stringent performance criteria. This paper reviews the latest developments in FDM technology, focusing on material innovations, structural optimization techniques, design for additive manufacturing and practical applications in the aerospace sector. Key advancements include the use of high-performance thermoplastics, carbon fiber composites, and hybrid materials, as well as improved printing techniques that reduce defects and enhance mechanical properties. The potential of FDM to revolutionize aerospace manufacturing through cost- effective and efficient production of complex geometries is explored, highlighting ongoing research and future directions in this dynamic field.
Comparative Studies of Nairobi-Sheep-Disease Virus Strains Infectivity, Immunogenicty and Cross- Protectivity in BALB/C Mice Model
Authors: P. Muriuki Ngari , G. D Ithinji , O. Ateya Leonard , S. Binepal Yatinder , Wasonga Caroline , M. Kiraithe Muthamia , Nyamache A. K
Published: July 2024

Nairobi sheep disease virus is a hemorrhagic virus that cause severe gastroenteritis in shoats resulting to significant morbidity and mortality in naïve small ruminants’ populations. Vaccine platform to develop efficacious vaccine against the Nairobi sheep disease virus have been unsuccessful. This research detail the comparative infection, immunogenicity, and protection of three Nairobi sheep strains; I34, 1473 and Ansell. The three strains are marked with differences in their ability to cause disease in suckling mice model. Fatality rates range from 0-50% from the virulent pathogenic 1473 strain, I34 and the seemingly less virulent Ansell strain also shown by their relative time to death. Findings of this research demonstrate that protective efficacy mediated by inactivated Nairobi sheep disease virus strain I34 conferred a stronger cross protection against homologous and heterologous strains compared to 1473 and Ansell strains. Strain I34 sera neutralization against homologous I34 strain was similar to that against Entebe strain providing evidence of possible antigenic homology. Vaccine developed from I34 strain will protect against multiple strains of Nairobi sheep disease virus; 1473, Ansell and Entebe strain. Understanding immune response in mice elicited by different Nairobi sheep disease virus strains will facilitate development of a more efficacious vaccine. Using formalin inactivated NSDV vaccine, I34 strain showed complete protection from homologous and a partial protection heterologous strains in in vitro assay. Protection was associated by higher neutralizing antibodies against homologous and heterologous strains compared to that of 1473 and Ansell. Thus, this study deduce serum neutralizing antibody titers are associated with protection against homologous and heterologous challenge
Evaluating the Influence of Online Payment Interfaces on Customer Satisfaction
Authors: Santosh Jagtap Swati
Published: July 2024

Online payment interfaces play a critical role in modern economies, shaping consumer behavior and offering opportunities to enhance their efficacy and security. India has witnessed a significant rise in digital payment transactions, notably BHIM UPI recording 8.03 billion transactions amounting to ₹12.98 lakh crore in January 2023 alone. By December 2022, the country had logged approximately 9.19 billion digital transactions for the fiscal year 2022-23[1]. This paper investigates the satisfaction levels of 400 respondents in Pune city regarding online payment platforms such as PhonePe, GooglePay, and Paytm, and presents actionable recommendations based on the study's findings.
Wormhole Geometry Modelling on Carbonate Matrix Acidizing: A Literature Review
Authors: Marcos Mota Teodoro
Published: July 2024

Matrix acidizing is a critical well-stimulation technique used to enhance the permeability of carbonate reservoirs by creating channels or "wormholes" through the dissolution of the rock matrix. The efficiency of this process is significantly influenced by the geometry of the wormholes formed. This review paper provides a comprehensive analysis of current research on wormhole geometry modeling in carbonate matrix acidizing, synthesizing findings from experimental studies, analytical models, and numerical simulations. Key factors affecting wormhole geometry, such as acid concentration, injection rate, and rock properties, are discussed. The review highlights the contributions of various modeling approaches in predicting wormhole formation and propagation, emphasizing the importance of accurately capturing the coupled effects of fluid flow, chemical reactions, and rock dissolution. The implications for optimizing acidizing treatments and enhancing hydrocarbon recovery are explored, alongside recommendations for future research. These include the need for field validation, advanced modeling techniques, real-time monitoring, interdisciplinary collaboration, and sustainability considerations. This synthesis aims to provide a foundation for improving the design and execution of matrix acidizing operations in carbonate reservoirs.
Overview Results of JWST Observations of Star-forming Clusters in the Extreme Outer Galaxy
Authors: Izumi Natsuko , Ressler Michael E. , Lau Ryan M. , Koch Patrick M. , Saito Masao , Kobayashi Naoto , Yasui Chikako
Published: July 2024

The extreme outer Galaxy (EOG), which we define as the region of the Milky Way with a galactocentric radius of more than 18 kpc, provides an excellent opportunity to study star formation in an environment significantly different from that in the solar neighborhood because of its lower metallicity and lower gas density. We carried out near- and mid-infrared (NIR and MIR) imaging observations toward two star-forming clusters located in the EOG using JWST NIRCam and MIRI with nine filters: F115W, F150W, F200W, F350W, F405N, F444W, F770W, F1280W, and F2100W. In this paper, we present an overview of the observations, data reduction, and initial results. The NIR sensitivity is approximately 10–80 times better than our previous observation with the Subaru 8.2 m telescope. Accordingly, the mass detection limit reaches to about 0.01–0.05 M
⊙, which is about 10 times better than the previous observations. At MIR wavelengths, the high sensitivity and resolution data enable us to resolve individual young stellar objects in such a distant region for the first time. The mass detection limit at MIR F770W filter reaches about 0.1–0.3 M
⊙. With these new observations, we have identified components of the clusters that previous surveys did not detect, including class 0 candidates, outflow/jet components, and distinctive nebular structures. These data will enable us to investigate the properties of star formation in the EOG at the same depth of detail as previous observations of star formation in the solar neighborhood.
Statistical Validation of Multiple Related Data Sets—Case Study Using Interstellar Boundary Explorer Satellite Data
Authors: Moran Kelly R. , Osthus Dave , Weaver Brian P. , Beesley Lauren J. , Stricklin Madeline A. , Janzen Paul H. , Reisenfeld Daniel B.
Published: July 2024

Space scientists often face the question of whether data collected by different instruments are measurements of the same source population. This paper proposes a statistical validation method for evaluating the agreement between such related data sets. It offers a detailed case study focused on validating a new data set from the Interstellar Boundary Explorer (IBEX) mission, which serves as a practical how-to guide for similar analyses. Since 2008, the IBEX satellite has been gathering data on heliospheric energetic neutral atoms (ENAs) while being exposed to various sources of background noise, such as cosmic rays and solar energetic particles. The IBEX mission initially released only a qualified triple-coincidence (qABC) data product, which was designed to provide observations of ENAs free of background contamination. Further measurements revealed that the qABC data were in fact susceptible to contamination, having relatively low ENA counts and high background rates. To mitigate this issue, the mission team recently considered releasing a certain qualified double-coincidence (qBC) data product, which has roughly twice the detection rate of the qABC data product. This paper presents a simulation-based validation of the new qBC data product against the already-released qABC data product. The results show that the qBCs can plausibly be said to be measuring the same source population as the qABCs up to an average absolute deviation of 3.6%. Visual diagnostics provide additional confirmation of source rate coherence across data products. The framework introduced here is general and can be applied to other validation problems both within and outside the field of space physics.
Neutrino Fluxes from Different Classes of Galactic Sources
Authors: Gagliardini Silvia , Langella Aurora , Guetta Dafne , Capone Antonio
Published: July 2024

We estimate the neutrino flux from different kinds of galactic sources and compare it with the recent diffuse neutrino flux detected by IceCube. We find that the flux from these sources may contribute to ∼20% of the IceCube neutrino flux. Most of the sources selected in this work populate the southern hemisphere, therefore a detector like KM3NeT could help in resolving the sources out of the observed diffused galactic neutrino flux.
The Population Synthesis of Wolf–Rayet Stars Involving Binary Merger Channels
Authors: Li Zhuowen , Zhu Chunhua , Lü Guoliang , Li Lin , Liu Helei , Guo Sufen , Yu Jinlong , Lu Xizhen
Published: July 2024

Wolf–Rayet (W-R) stars are very important massive stars. However, their origin and the observed binary fraction within the entire W-R population are still debated. We investigate some possible merger channels for the formation of W-R stars, including main sequence (MS)/Hertzsprung gap (HG) + MS, He + HG/giant branch (GB). We find that many products produced via binary merger can evolve into W-R stars, the MS/HG + MS merger channel can explain W-R stars with luminosities higher than ∼105.4
L
⊙, while the He + HG/GB merger channel can explain low-luminosity W-R stars in the range of 104.7
L
⊙ ∼ 105.5
L
⊙. In the population synthesis analysis of W-R stars, we assume an initial binary fraction (f
ini,bin) of 50% and 100% for massive stars. We also assume that MS/HG + MS merger products are nonrotating or rapidly rotating (ω/ω
crit = 0.8). In different cases, the calculated single fractions of W-R stars range from 22.2%–60.6% in the Milky Way (MW) and from 8.3%–70.9% in the Large Magellanic Cloud (LMC). The current observations fall within the range of our calculations. When the merger product of MS/HG + MS rotates rapidly, we estimate that there are approximately 1015–1396 W-R stars in the MW and 128–204 W-R stars in the LMC. Our model also roughly reproduces the observed single-peak luminosity distribution of W-R stars in the MW. However, the weak bimodal luminosity distribution observed in the LMC is not reproduced in our model. We assess that this may be due to the model underestimating the mass-loss rate in the LMC. In conclusion, we consider that the binary merger is a significant formation channel for W-R formation, and can explain the observed high fraction of the single W-R stars in the total population.
Formation of Giant Planets by Gas Disk Gravitational Instability on Wide Orbits around Protostars with Varied Masses. II. Quadrupled Spatial Resolution and Beta Cooling
Authors: Boss Alan P.
Published: July 2024

Exoplanet demographics are sufficiently advanced to provide important constraints on theories of planet formation. While core and pebble accretion are preferred for rocky and icy planets, there appears to be a need for gas disk gravitational instability (GDGI) to play a role in the formation of M-dwarf gas giants and those orbiting at large distances. Here we present GDGI models that go beyond those presented by Boss (2011) dealing with the formation of wide-orbit gas giants. The new models use quadrupled spatial resolution, in both the radial and azimuthal directions, to reduce the effects of finite spatial resolution. The new models also employ the β cooling approximation, instead of the diffusion approximation used by Boss (2011), in order to push the models further in time. As in Boss (2011), the central protostars have masses of 0.1, 0.5, 1.0, 1.5, or 2.0 M
⊙, surrounded by disks with masses ranging from 0.019 M
⊙ to 0.21 M
⊙. For each case, two models are computed, one with an initial minimum Toomre Q stability value ranging from 1.1 to 1.7, and one with a higher initial disk temperature, resulting in the initial minimum Q ranging from 2.2 to 3.4. These new models continue to show that GDGI can explain the formation of gas giants at distances of ∼30 to ∼50 au on eccentric orbits (e less than ∼0.2), though the number formed drops to 0 as the protostar mass decreases to 0.1 M
⊙.
Periodically Modulated Magnetic Reconnection
Authors: Liu Chengming , Cao Jinbin , Xing Xining , Liu Yangyang , Zhao Boning
Published: July 2024

We present the first evidence for periodically modulated reconnection at the electron scale in space, using unparalleled, high-cadence data from Magnetospheric Multiscale spacecraft. The periodic modulation is attributed to finite magnetic trapping imposed by the X-line, which generates discrete, dispersive electron stripes. The dispersive stripes, well reproduced by a trapping-loss transition model, periodically break the frozen-in condition and drive energy dissipation. Such an electron transition effect eliminates free electrons, enhances electron mixing, and causes highly structured, three-dimensional distributions that generate intense radio emissions. These illuminating results, suggesting that reconnection hosts inherent periodicity determined by three-dimensional electron physics, provide crucial insights into understanding reconnection-driven energy transport in space and astrophysical plasmas.
An Atypical Low-frequency Quasiperiodic Oscillation Detected in the Hard State of MAXI J1348–630 with Insight-HXMT
Authors: Wang Xin-Lei , Yan Zhen , Xie Fu-Guo , Wang Jun-Feng , Ma Ren-Yi
Published: July 2024

Based on the Insight-HXMT archival data, we have detected a new atypical low-frequency quasiperiodic oscillation (LFQPO) in the black hole X-ray binary MAXI J1348−630. The new LFQPO is detected in all three instruments of Insight-HXMT with a combined significance of 3σ–5σ, covering a wide energy range of 1–100 keV. The fractional rms seems to decrease with energy. It exclusively appears in the hard state during both the main and mini outburst, spanning an X-ray intensity range by a factor of 10, and a very narrow hardness range. The frequency of this new type of LFQPO is moderately stable, in the range of 0.08–0.15 Hz. We discussed different models for the LFQPO, and found none can explain the observed properties of this new type of LFQPO.
PHANGS-HST Catalogs for ∼100,000 Star Clusters and Compact Associations in 38 Galaxies. I. Observed Properties
Authors: Maschmann Daniel , Lee Janice C. , Thilker David A. , Whitmore Bradley C. , Deger Sinan , Boquien Médéric , Chandar Rupali , Dale Daniel A. , Wofford Aida , Hannon Stephen , Larson Kirsten L. , Leroy Adam K. , Schinnerer Eva , Rosolowsky Erik , Úbeda Leonardo , Barnes Ashley T. , Emsellem Eric , Grasha Kathryn , Groves Brent , Indebetouw Rémy , Kim Hwihyun , Klessen Ralf S. , Kreckel Kathryn , Levy Rebecca C. , Pinna Francesca , Rodríguez M. Jimena , Tian Qiushi , Williams Thomas G.
Published: July 2024

We present the largest catalog to date of star clusters and compact associations in nearby galaxies. We have performed a V-band-selected census of clusters across the 38 spiral galaxies of the PHANGS–Hubble Space Telescope (HST) Treasury Survey, and measured integrated, aperture-corrected near-ultraviolet-U-B-V-I photometry. This work has resulted in uniform catalogs that contain ∼20,000 clusters and compact associations, which have passed human inspection and morphological classification, and a larger sample of ∼100,000 classified by neural network models. Here, we report on the observed properties of these samples, and demonstrate that tremendous insight can be gained from just the observed properties of clusters, even in the absence of their transformation into physical quantities. In particular, we show the utility of the UBVI color–color diagram, and the three principal features revealed by the PHANGS-HST cluster sample: the young cluster locus, the middle-age plume, and the old globular cluster clump. We present an atlas of maps of the 2D spatial distribution of clusters and compact associations in the context of the molecular clouds from PHANGS–Atacama Large Millimeter/submillimeter Array. We explore new ways of understanding this large data set in a multiscale context by bringing together once-separate techniques for the characterization of clusters (color–color diagrams and spatial distributions) and their parent galaxies (galaxy morphology and location relative to the galaxy main sequence). A companion paper presents the physical properties: ages, masses, and dust reddenings derived using improved spectral energy distribution fitting techniques.
PHANGS-JWST: Data-processing Pipeline and First Full Public Data Release
Authors: Williams Thomas G. , Lee Janice C. , Larson Kirsten L. , Leroy Adam K. , Sandstrom Karin , Schinnerer Eva , Thilker David A. , Belfiore Francesco , Egorov Oleg V. , Rosolowsky Erik , Sutter Jessica , DePasquale Joseph , Pagan Alyssa , Berger Travis A. , Anand Gagandeep S. , Barnes Ashley T. , Bigiel Frank , Boquien Médéric , Cao Yixian , Chastenet Jérémy , Chevance Mélanie , Chown Ryan , Dale Daniel A. , Deger Sinan , Eibensteiner Cosima , Emsellem Eric , Faesi Christopher M. , Glover Simon C. O. , Grasha Kathryn , Hannon Stephen , Hassani Hamid , Henshaw Jonathan D. , Jiménez-Donaire María J. , Kim Jaeyeon , Klessen Ralf S. , Koch Eric W. , Li Jing , Liu Daizhong , Meidt Sharon E. , Méndez-Delgado J. Eduardo , Murphy Eric J. , Neumann Justus , Neumann Lukas , Neumayer Nadine , Oakes Elias K. , Pathak Debosmita , Pety Jérôme , Pinna Francesca , Querejeta Miguel , Ramambason Lise , Romanelli Andrea , Sormani Mattia C. , Stuber Sophia K. , Sun Jiayi , Teng Yu-Hsuan , Usero Antonio , Watkins Elizabeth J. , Weinbeck Tony D.
Published: July 2024

The exquisite angular resolution and sensitivity of JWST are opening a new window for our understanding of the Universe. In nearby galaxies, JWST observations are revolutionizing our understanding of the first phases of star formation and the dusty interstellar medium. Nineteen local galaxies spanning a range of properties and morphologies across the star-forming main sequence have been observed as part of the PHANGS-JWST Cycle 1 Treasury program at spatial scales of ∼5–50 pc. Here, we describe pjpipe, an image-processing pipeline developed for the PHANGS-JWST program that wraps around and extends the official JWST pipeline. We release this pipeline to the community as it contains a number of tools generally useful for JWST NIRCam and MIRI observations. Particularly for extended sources, pjpipe products provide significant improvements over mosaics from the MAST archive in terms of removing instrumental noise in NIRCam data, background flux matching, and calibration of relative and absolute astrometry. We show that slightly smoothing F2100W MIRI data to 0.″9 (degrading the resolution by about 30%) reduces the noise by a factor of ≈3. We also present the first public release (DR1.1.0) of the pjpipe processed eight-band 2–21 μm imaging for all 19 galaxies in the PHANGS-JWST Cycle 1 Treasury program. An additional 55 galaxies will soon follow from a new PHANGS-JWST Cycle 2 Treasury program.
Breaking Boundaries: A Universal Wavefront Reconstruction Approach for High-resolution Solar Imaging
Authors: Ge Xinlan , Zhu Licheng , Gao Zeyu , Ma Shiqing , Li Ao , Wang Shuai , Yang Ping
Published: July 2024

This Letter proposes a universal wavefront reconstruction approach based on a coupled data set and neural network, aiming to overcome the limitations of current algorithms in terms of universality and wavefront sensing accuracy for variable imaging objects. First, a novel data set, Multi-Object Wavefront Coupling Dataset (MOCD-Dataset), is developed to provide diverse data and enable the network to learn universal wavefront features. Next, a new universal wavefront reconstruction network called Object-Independent Wavefront Decoupling Network (OIWD-Net) is introduced, aiming to separate imaging object information from multiple variable images. Our algorithm eliminates the need for specialized wavefront sensors, has a simple system, high light energy utilization, and does not require customized models for each different type of imaging objects, making it highly practical. By combining the MOCD-Dataset and the OIWD-Net, excellent accuracy in wavefront reconstruction of different imaging objects has been achieved. This research provides a new solution for high-resolution image restoration in fields such as solar structure observation and astronomical high-resolution imaging.
JCMT SCUBA-2 Sub-millimeter Observations of AT2018cow
Authors: Smith I. A. , Tanvir N. R. , Perley D. A.
Published: July 2024

We present a reprocessing of all the submillimeter observations of the optical transient AT2018cow that were performed simultaneously at 850 μm (350 GHz) and 450 μm (670 GHz) using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2), the 10,000 pixel bolometer continuum camera on the James Clerk Maxwell Telescope on Maunakea, Hawai’i. A bright source was detected in our initial observations. The peak in the longer wavelength spectrum had just passed through the SCUBA-2 region prior to our first observation.
Sinking Stars: Experimental Design for Sinking Rates of Chytrid Infected Diatom Asterionella formosa
Authors: Kotnik Grace , Morales Lisa , Ibelings Bastiaan Willem , Thomas Mridul , Gsell Alena , van de Waal Dedmer
Published: July 2024

Poster showing the experimental design for a laboratory assay for sinking rates of chytrid infected diatom Asterionella formosa.
Diversity Restated: >99.9% of Global Species in Soil Biota
Authors: Blakemore Robert
Published: July 2024

Recent dawning and the uptake expansion of rapid genomic sequencing has radically transformed our understanding of the biosphere, especially casting a new light in relation to soils. Williamson et al. (2017) concluded: “Soils represent the greatest reservoir of biodiversity on the planet; prokaryotic diversity in soils is estimated to be three orders of magnitude greater than in all other ecosystems combined.” In other words, soils may contain >99.9% of species, mainly microbes. Supporting this were, for example, Bickel & Or (2020) and Zhao et al (2022) who found: “soil is the most microbiologically abundant (1029) and diverse (1011) environment on the Earth” and, in their figure 3A, these latter authors showed soil taxa at >10× that of the ocean, i.e., >90% diversity in Soil vs Ocean. Independently, Blakemore (2022) estimated the Soil Realm is home to ~2.1 x 1024 taxa supporting >99.9% of global species biodiversity, mostly Bacteria, Archaea or other microbes, based upon topographic extrapolation of field data.
Spray-dried microparticles of turmeric extract for improved delivery and low toxicity
Authors: Yupanqui Chutha Takahashi , Suksanga Anunya , Ardhanwanich Sutasinee , Ungphaiboon Suwipa
Published: July 2024

This study aimed to enhance the delivery of turmeric by encapsulating its extract within microparticles using chitosan and mannitol through the spray drying technique and to assess their acute oral toxicity. The resulting microparticles were spherical, with an average diameter of 4 microns, and comprised 17% curcuminoids and 4% ar-turmerone. In vitro studies demonstrated that these microparticles had a higher release rate of curcuminoids compared to raw turmeric extract and preserved antioxidant activity. In the acute toxicity study, conducted in Wistar rats with a single dose of 2,000 mg/kg, no acute toxic symptoms were observed. According to the Globally Harmonized System of Classification and Labeling of Chemicals, the microparticles were categorized as having relatively low acute toxicity (category 5). These findings support the potential utility of the microparticles in dietary supplements and pharmaceutical applications due to their effective delivery properties and safety profile.
« Procéder plus historiquement que nulle part ailleurs ». Hegel et l’historicisation du discours philosophique en Allemagne (1767-1830)
Authors: Bartsidi Ioanna
Published: July 2024

À partir de la seconde moitié du xviii e  siècle, et à la suite de la Critique de la raison pure , l’histoire de la philosophie émerge comme discipline au sein des universités allemandes. La période est caractérisée aussi bien par la quête post-kantienne d’une histoire a priori de la philosophie, que par la multiplication des pratiques historiennes empiriques hybrides. Cet article inscrit l’histoire de la philosophie de Hegel dans le contexte de l’historiographie philosophique de son époque, dans le but d’éclairer la critique spécifique que le philosophe énonce à l’encontre de l’histoire « narrative » de la philosophie. On explore ensuite comment Hegel tente de fonder cette discipline naissante de manière « spéculative » par une théorie du vrai comme développement historique. L’enjeu de la démarche hégélienne est double : intégrer les savoirs issus des sciences historiques, tout en pensant l’autonomie du discours philosophique à l’ère de son historicisation. C’est donc seulement en la situant au sein des processus de disciplinarisation de l’histoire de la philosophie que nous pouvons pleinement saisir la spécificité de la théorie de Hegel, et juger de la pertinence qu’elle peut encore avoir pour les débats de notre temps.
Fonološki opis govora kraja Dobovec pri Rogatcu (SLA T339)
Authors: Jakop Tjaša
Published: July 2024

V prispevku je prikazan narečni govor kraja Dobovec pri Rogatcu (SLA T339), ki spada v srednještajersko narečje štajerske narečne skupine (z nekaj prehodnimi značilnostmi). Fonološki opis prikazuje osnovne glasoslovne in naglasoslovne značilnosti tega govora in je nastal na osnovi narečnega gradiva, ki ga je za Slovenski lingvistični atlas (SLA) zbral Jurij Rojs leta 1966. Gradivo je zapisano v stari Ramovševi fonetični transkripciji, zato je avtorica za potrebe fonološkega opisa narečne odgovore celotne vprašalnice pretvorila v sodobno slovensko fonetično transkripcijo.
Homelessness: A Public Health Perspective on a Present Crisis
Authors: Martin Margaret
Published: July 2024

Addressing increasing rates of homelessness is a matter of great importance in North America due to adverse consequences on health, particularly in marginalized populations. Rates of homelessness as well as associated health issues in unhoused populations have continued to play a considerable role in countless communities. Therefore, to pursue solutions to the current crisis of homelessness from a public health perspective, this article seeks to place multiple proposals for solutions in conversation. This article contends that to effectively address homelessness from a public health perspective a multi-faceted approach must be implemented, led by a coalition of leaders from a variety of disciplines, comprehensively addressing homelessness, and supporting the unhoused.