bluuebunny/crossref_metadata_2025_split huggingface dataset:
Inwestycje w spółki branży odzieżowej na GPW w Warszawie w czasie pandemii Covid-19 i w czasie wojny Rosji z Ukrainą
Authors: Frączek Jędrzej 
Published: September 2024

Cel artykułu. Pandemia Covid-19 oraz wojna Rosji z Ukrainą zaburzyły działalność gospodarczą wielu podmiotów funkcjonujących w różnych branżach oraz zwiększyły niepewność na rynkach finansowych. Za cel badań przyjęto rozpoznanie spółek z branży odzieżowej notowanych na GPW w Warszawie pod kątem możliwości inwestowania w warunkach kryzysowych.
Metoda badawcza. W odniesieniu do załozonego celu sformułowano następujące pytania badawcze:
PB1. Czy odnotowano różnice w rentowności i ryzyku inwestycji w spółki z branży odzieżowej notowane na GPW w czasie pandemii Covid-19 i w czasie wojny Rosji z Ukrainą w porównaniu z okresem przed tymi wydarzeniami?
PB2. Czy spółki z branży odzieżowej dają szansę na osiąganie wyników korzystniejszych w porównaniu z inwestowaniem w szeroki rynek reprezentowany przez indeks WIG 20?
Badania mają charakter eksploracyjny, w związku z tym nie sformułowano hipotez badwczych.
Badania przeprowadzono w dwóch etapach:
I etap polegał na rozpoznaniu specyfiki spółek z branży odzieżowej notowanych na GPW. Ta część badań opierała się na analizie literatury, krytycznej analizie literatury i analizie dokumentów.
II etap polegał na przeprowadzeniu analizy porównawczej (w czasie i w przestrzeni) stóp zwrotu oraz ryzyka indeksów WIG20, WIG-Odzież oraz spółek z indeksu WIG-Odzież. Dane za okres 2017–2023 wykorzystane w badaniach, tj. dzienne kursy spółek indeksu WIG-Odzież, pochodzą z sekcji dane historyczne internetowego serwisu finansowego stooq.pl.
Wyniki badań. Przeprowadzone badania wskazują na:

zróżnicowanie w modelu operacyjnym, profilu działalności/asortymencie oraz grupach potencjalnych odbiorców spółek branży odzieżowej notowanych na GPW;
różnice w rentowności poziomie ryzyka inwestycji w spółki z branży odzieżowej na GPW w czasie pandemii i w czasie wojny Rosji z Ukrainą w porównaniu z okresem przed tych wydarzeń. Równocześnie odnotowano różnice w osiąganych wynikach finansowych oraz ryzyku ponoszonym przez inwestorów lokujących swój kapitał w akcjach poszczególnych spółek.

Inwestycje w spółki z indeksu WIG-Odzież, w porównaniu z inwestowaniem w szeroki rynek reprezentowany przez indeks WIG20, charakteryzuje wyższe ryzyko i bardzo zróżnicowana rentowność.
Potensi Delima (Punica granatum) dalam kajian Qur'an dan Sunnah
Authors: Resmisari Ruri Siti , Syarifah Umaiyatus , Holil Kholifah , Hanifah Lil 
Published: September 2024

Pomegranate (Punica granatum) occupies a special place in Islamic tradition and modern health literature. This article aims to explore the potential of pomegranate from the perspective of the Qur'an and Sunnah, as well as to examine the health benefits substantiated by scientific research. Pomegranate is mentioned in several verses of the Qur'an, such as in Surah al-An'am (6): 99 and Surah Ar-Rahman (55): 68, highlighting its significance as a symbol of Allah's power. Hadith also recommend the consumption of pomegranate, indicating its spiritual and medicinal properties.Previous research has demonstrated that pomegranate possesses antioxidant and anti-inflammatory properties, and it has the ability to reduce the risk of heart disease and cancer. Studies confirm that pomegranate consumption can mitigate oxidative stress, inflammation, and cancer cell proliferation. This article compiles and analyzes data from various literature sources using a systematic literature review method.The findings of this review indicate that pomegranate has significant religious and health benefits, rendering it an important fruit in a healthy diet and alternative medicine. Further research is necessary to explore the applications of pomegranate in modern health therapies more comprehensively.
Dijital Emeğin ve Sosyal Medyanın Tüketiciler Üzerindeki Etkisi
Authors: Tokgöz Çağla , Toksarı Murat 
Published: September 2024

Son yıllarda iletişim teknolojilerindeki yaşanan değişim ve gelişimle birlikte sosyal medya kullanımı oldukça fazladır. Bu kullanım kişinin farkında olmadan etkileşim halinde olup emek harcamasına neden olmaktadır.	Emek sosyal medyanın kullanım alanında maddi olarak karşılığı alınmadığından dolayı emek “dijital emek”e dönüşmektedir. Dijital emek kavramı sosyal medya kullanıcılarının üretken emek olup olmadığı tartışması üzerine çıkmış bir kavramdır. Dijital emek kavramında zaman ve mekân olgusu olmadığından dolayı emek, dijital bir boyut kazanarak evrilmiştir. Yaşanan bu durum iletişim teknolojilerindeki değişimle birlikte gerek kullanıcı emeği gerekse dijital emek arasında bir ayrıma neden olmaktadır. Bu ayrım sosyal medya bağlamında tüketici tercihlerini de etkilemektedir. Dolayısıyla dijitalleşmenin getirisi olan tüketim sosyal medya ile birleşerek tüketiciyi doğrudan etkilemektedir.
Buradan hareketle bu çalışmanın ortaya çıkış nedeni dijital emeğin sosyal medya bağlamında tüketiciyi nasıl değiştirdiğine dair etkisine odaklanmaktadır. Hayatımızın her anına eşlik eden sosyal medya, dijital emek kavramıyla birleşerek kullanıcıları nasıl etkilemektedir ve bu etki tüketiciyi ne kadar değiştirmektedir çalışmada incelenen konulardan biridir. 18-25 yaş arasında sosyal medya kullanıcıları üzerinde yapılan bu çalışmada yüz yüze anket tekniğinden yararlanılarak dijital emek ile sosyal medya kullanımı tüketiciyi nasıl değiştirdiği ortaya konulmaya çalışılmaktadır.
Pengaruh Pendekatan Pendidikan Matematika Realistik (PMR) Terhadap Kemampuan Koneksi Matematis Siswa di SMP Negeri 3 Gunungputri
Authors: Koeshella Ajeng , Rahayu Wardani , Santi Vera Maya 
Published: September 2024

Penelitian ini bertujuan untuk mengetahui apakah terdapat pengaruh pendekatan pembelajaran matematika realistik terhadap kemampuan koneksi matematis siswa SMP Negeri 3 Gunungputri. Metode penelitian yang digunakan adalah Quasi-Experimental Design. Teknik pengambilan sampel yang digunakan yaitu teknik Cluster Random Sampling untuk menentukan kelas eksperimen dan kelas kontrol. Kedua kelas tersebut telah memenuhi syarat normalitas, homogenitas, dan kesamaan rata-rata. Instrumen penelitian yang digunakan dalam penelitian ini yaitu hasil tes kemampuan koneksi matematis siswa pada materi bangun ruang sisi datar. Instrumen berbentuk soal uraian sebanyak empat butir soal yang telah diuji validitas dan reliabilitasnya. Pengujian hipotesis dilakukan dengan menggunakan statistik uji-t. Berdasarkan hasil pengujian hipotesis diperoleh nilai dengan nilai sehingga dapat disimpulkan bahwa . Hal tersebut menunjukkan bahwa terdapat pengaruh pendekatan pendidikan matematika realistik (PMR) terhadap kemampuan koneksi matematis siswa SMP Negeri 3 Gunungputri. Berdasarkan perhitungan besar pengaruh diperoleh dengan persentase sebesar 69% yang termasuk kategori medium.
Formulasi dan uji aktivitas antioksidan sabun cair wajah ekstrak etanol daun teh hijau (Camellia sinensis L.) dengan metode DPPH
Authors: Widiyanti Annisa , Turahman Taufik , Harmastuti Nurani 
Published: September 2024

Teh memiliki kandungan senyawa fenolik yang berfungsi sebagai antioksidan. Studi ini bertujuan untuk mengetahui formulasi dan aktivitas antioksidan sabun cair wajah ekstrak etanol daun teh hijau (Camellia sinensis L.). Pada studi ini digunakan variasi konsentrasi surfaktan, sodium cocoyl isethionate 4%, 8% dan 12%. Pengujian sediaan sabun wajah terhadap mutu fisiknya mempergunakan uji organolepis, pH, homogenitas, tinggi busa, alkali bebas, bobot jenis dan viskositas, serta dilakukan cycling test. Pengujian aktivitas antioksidan sediaan sabun cair wajah secara in vitro mengggunakan metode DPPH (1,1-diphenyl-2-picrylhydrazil) yang ditambahkan untuk mengetahui aktivitas antiosidan. Hasil studi diperoleh bahwa semua formula sediaan sabun cair wajah ekstrak etanol daun teh hijau (Camellia sinensis L.) bermutu fisik sesuai SNI antara lain organoleptis, pH, alkali bebas dan bobot jenis. Selain itu, sabun cair wajah ekstrak etanol daun teh hijau juga memiliki stabilitas baik ditunjukkan oleh formula 5 dan aktivitas antioksidan paling baik ditunjukkan oleh formula 4 dengan nilai IC50 10,5685 ± 0,2211 ppm.

Kata Kunci: Daun teh hijau, antioksidan, formulasi sabun cair wajah, DPPH
Fast Optimization of the Net Present Value of Unconventional Wells Using Rapid Rate-Transient Analysis
Authors: Ruiz Maraggi Leopoldo Matias , Walsh Mark P. , Lake Larry W. , Male Frank R. 
Published: September 2024

SummaryDecline-curve analysis (DCA) is the industry standard to predict hydrocarbon production to then estimate the net present value (NPV) of unconventional wells. Conventional DCA assumes the flowing bottomhole pressure (BHP) is constant. This is an unrealistic assumption for many unconventional wells that can lead to incorrect estimates of ultimate recovery and thus erroneous NPV calculations. This work illustrates the application of a novel technique that combines variable BHP conditions with decline-curve models [Rapid rate-transient analysis (RTA)] to estimate the NPV and select the optimal cluster spacing and number of fractures for a given well. We compare the results of DCA and Rapid RTA to estimate and optimize the cluster spacing for a tight oil and shale gas well.The Rapid RTA results show marked differences in terms of the shape and the optimal value of the NPV function from the simpler DCA method. For the two cases illustrated, DCA results are a direct consequence of the rate-time analysis failing to correctly detect the onset of boundary-dominated flow (BDF). In contrast, Rapid RTA correctly detects the onset of BDF and presents a defined maximum value of the NPV vs. cluster spacing (number of fractures) function. This optimal value is a trade-off between the fracture treatment cost, the speed of recovery of hydrocarbons, and the value of money with time (discount rate).The major contribution of this work is the implementation of the Rapid RTA technique allowing fast computation of pressure-rate-time analysis and NPV calculations with computational times comparable with DCA for optimizing fracture cluster spacing and the total number of fractures of unconventional wells. We have developed a web-based application to give readers a hands-on experience of this new technique and to analyze and optimize the NPV of unconventional wells.
CO2-Induced In-Situ Targeted Precipitation of Asphaltene in Heavy Oil Reservoirs: Balancing Formation Gas Channeling Regulation and Wellbore Asphaltene Blockage Prevention
Authors: Gu Zihan , Zhang Chao , Li Pengfei , Li Zongyang , Wang Meijia , Li Zhaomin 
Published: September 2024

Summary
To investigate the mechanisms of the asphaltene precipitation in oil caused by CO2, the sandstone core oil displacement experiments and asphaltene structure observation experiments are designed in this work. The oil displacement experiments create CO2 flooding conditions under different pressures in heavy oil reservoirs and analyze the produced oil components and precipitated asphaltene proportions. Meanwhile, nuclear magnetic resonance (NMR) analysis is conducted on the sandstone cores to discuss the precipitation characteristics of asphaltene in the reservoir pores. The observation experiments analyze the microstructure of precipitated asphaltene after interactions between oil and CO2. The results show that the increasing pressure promotes the precipitation of asphaltene from oil by enhancing the dissolution and component extraction of CO2 in oil, which reduces oil viscosity and promotes reservoir development efficiency. This process also leads to an increase in CO2 sequestration in the reservoir. However, the precipitated asphaltene reduces reservoir permeability, hindering the optimization of the oil recovery rate. During the process of increasing pressure, the rate of increase in oil recovery decreases. In reservoirs containing oil with high asphaltene proportion, the oil recovery rate even decreases under high pressure. Additionally, in-situ targeted precipitation and retention of asphaltenes in large pores can reduce the distribution differences of pores with different sizes in the reservoir, weakening the above negative effects and enhancing oil recovery by regulating gas channeling. Moreover, the ratio of resin in oil affects the asphaltene precipitation form, and CO2 can promote the association of asphaltenes by weakening the steric stabilization effect of resin on asphaltene in oil, which makes the microstructure of precipitated asphaltenes dense and regular and promotes asphaltene precipitation and oil recovery increasing. This work aims to verify the advantages of CO2-induced asphaltene precipitation in improving the efficient and environmentally friendly development of heavy oil reservoirs, while exploring the significance of CO2 flooding in promoting carbon sequestration.
Overcoming Knowledge Barriers to Maternal Care: Experimental Evidence on the Calibration and Efficacy of Informational Messaging from Pakistan
Authors: Cesur Resul Resul , Cyan Musharraf , Civelek Yasin , Yedgenov Bauyrzhan , Rothenberg Richard 
Published: September 2024

Abstract

We conducted a large-scale field experiment to calibrate phone messaging to its potential of overcoming behavioral barriers to maternal care uptake in the countryside of a developing country, where a significant share of women forgoes life-saving maternity-related care even when within reach. The high-arching goal of our intervention is to test if and to what extent filling out insufficient domain knowledge (i.e., childbearing-related health literacy) generates responsiveness to nudges for adopting maternal care among the rural poor of Pakistan. We find that informational nudges sent in a random order using the appropriate medium of communication, voice messages, during pregnancy significantly improve care-seeking behaviors, measured by antenatal care, postpartum checkup, and postnatal visits, through improved literacy. Importantly, we document that high-frequency voice calls timed to gestational age substantially increase the efficacy of informational nudges, including boosting facility deliveries, once domain knowledge is built and nudgeability established. Nevertheless, small financial incentives trump the productivity of informational voice calls in both improving health literacy and boosting care uptake, likely due to participants equating the intrinsic value of the intended behavioral change to the size of the monetary reward. These results are scalable to a large number of populations across developing nations.
JEL codes: I12; I15; C93; D10; D91
An Artificial Intelligence Copilot System Helps Reduce Mortality Rates of Hemodialysis Patients
Authors: Chen Jianghua , Lou Xiaowei , Qian Siyi , Chen Jintai , Liu Ben , Zhang Ping , Chen Xi , Yao Xi , Wang Yusong , Gai Pengliang , Jing Yuan , Zheng Weijun , Chen Danny , Zhang Peng , Xu Dong , Wu Jian 
Published: September 2024

Abstract

Hemodialysis is the primary treatment for end-stage renal disease patients, but its mortality rate is still unacceptably high. Based on multi-modality examination data of 63,499 patients from 333medical centers, we developed a Hemodialysis Early Warning and Intervention Copilot (HEWIC) system. This system assists healthcare professionals in identifying hemodialysis patients at high risk of mortality and provides risk factors to makeintervention decisions jointly with healthcare professionals. On the retrospective cohort, HEWICachieved ROC-AUC scores of 0.82and 0.79 on one-month and three-month mortality probability prediction, respectively. We then conducted a pragmatic clinical trial (RCT, ChiCTR2100052662) to evaluate whether HEWIC could assist healthcare professionals in intervention to reduce the mortality rate of hemodialysis patients in the real world. Involving 9,965 hemodialysis patients (5,216 intervention and 4,749 control) from 58 dialysis centers, the trial indicates that HEWIC’s high-risk patient identification and treatment recommendation can help reduce the three-month mortality rate of hemodialysis patients by 38.3%, with a more pronounced effect in primary hospitals. Patients managed by the intervention group (where professionals assisted by HEWIC) received more types of drug treatment and showed varying degrees of improvement in anemia, blood pressure, blood lipids, electrolytes, and inflammatory conditions, thanthe control group. Furthermore, HEWICdoes not require additional time investment from healthcare professionals, nor does it interfere with their clinical work. This study proves that the AI-copilot system not only can benefit hemodialysis treatment but also enhance the standardization of medical care across different regions. Additionally, it also suggests that the human-AIcollaborationframework has the potential to revolutionize clinical diagnosis and treatment practice for other diseases.
Early sex-related transcriptional differences in CD8+ T cells responding to chronic viral infection reveal a sex bias in exhaustion
Authors: Arsenio Janilyn , Kahia Nyambura , Robertson Sean , Rodriguez Megan , Layug Paul Jerard , Vats Harman , Kannan Kamali , Spicer Victor , Ozturk-Aptekmann Arzu , Wilkins Olivia 
Published: September 2024

Abstract

CD8+ T cell diversity is essential to control infections and chronic antigen stimulation. In acute-resolving infection, effector cells mediate acute responses and memory cells provide long-lived protection against future exposures. In chronic infection and cancer, an altered state called exhaustion occurs. Exhausted CD8+ T cells are molecularly and functionally distinct from effector and memory cells. Differences in immune responses exist between biological sexes, however, how biological sex influences the timing and transcriptional programs of CD8+ T cell responses during chronic versus acute viral infection remains unknown. Here, we show that male and female CD8+ T cells exhibit transcriptional differences in their early responses during chronic but not acute viral infection in vivo. Using single-cell RNA-sequencing and immunophenotyping analyses, we show that female CD8+ T cells adopt an early exhaustion-like program compared to males. These findings reveal new insights into sex-related differences in CD8+ T cell exhaustion development and early T cell responses that may contribute to sex differential immune responses.
WITHDRAWN: Investigation of Turbulence Flow Field and Pressure Pulsation in 3D Impeller Axial Pump Based on Inner Dynamic Simulation and Vibration Technique Analyses
Authors: Al-Obaidi Ahmed Ramadhan , Alhamid Jassim 
Published: September 2024

Abstract

The full text of this preprint has been withdrawn, as it was submitted in error. Therefore, the authors do not wish this work to be cited as a reference. Questions should be directed to the corresponding author.
Exploring Seismic Warning Thresholds For Vehicle-Track Systems: A Combined Shaking Table Test and Dynamic Numerical Simulations
Authors: Li Hao , Zhang Hongru , Pan Hua 
Published: September 2024

Abstract

This study conducted vehicle-track shaking table model tests at the Seismic Laboratory of the China Academy of Building Research, employing both unidirectional (horizontal) and bidirectional (horizontal and vertical) seismic waves. Discussions were made on the dynamic response of the vehicle-track system and the mechanism of derailment, providing data support for the research on seismic early warning thresholds for vehicles. Additionally, three-dimensional finite element numerical simulations were performed on the vehicle-track dynamic model, successfully incorporating track irregularities into the model. In this paper, the main conclusions are as follows:The limits of the wheel load reduction rate and that of the derailment coefficient specified in China's national standard “Code for Dynamic Performance Evaluation and Test Identification of Railway Vehicles” are conservative.The primary cause of vehicle derailment was identified as horizontal vibration of the track structure induced by seismic activity. Different seismic waves have varying effects on the dynamic response of the vehicle-track model, necessitating further research on the impact of seismic wave spectrum characteristics on vehicle safety during operation. When horizontal and vertical seismic waves are simultaneously applied, horizontal seismic waves have a greater impact on dynamic response.The numerical simulation results align well with experimental results, confirming the accuracy of the vehicle-track dynamic numerical model. It is recommended to adopt a more conservative seismic early warning threshold of 0.04g to ensure the safety of train operation.
Impact of oral azithromycin and intermittent preventive treatment with sulfadoxine-pyrimethamine regimen on child mortality in Sierra Leone: trial protocol for a randomised, two-arm, double-blinded, placebo-controlled clinical trial (ICARIA)
Authors: Owusu-Kyei Kwabena , Chen Haily , Chileshe Maureen , Quintó Llorenç , Sibley Maya , Figueroa-Romero Antía , Llach Mireia , Ramírez Máximo , Bofill Andreu , Samai Mohamed , Menéndez Clara 
Published: September 2024

Abstract

Background: Azithromycin has been shown to be beneficial in preventing infectious diseases, including malaria, infectious diarrhoea and pneumonia. A cluster randomised control trial on azithromycin MDA in children in Niger, Malawi and Tanzania found a reduction in all-cause under-five (U5) mortality in communities who received azithromycin compared to placebo. However, the reduction was largest and statistically significant only in Niger. The purpose of this trial is to evaluate the impact of azithromycin plus intermittent preventive treatment in infants (IPTi), recently renamed by the World Health Organisation as perennial malaria chemoprevention (PMC), with sulfadoxine-pyrimethamine (SP) on all-cause mortality up to 18 months of age in children living in areas of high mortality burden through the Expanded Program on Immunisation (EPI) in Sierra Leone.
Methods: The Improving Care through Azithromycin Research for Infants in Africa (ICARIA) trial is a phase III two-arm, individually randomised, double-blinded, placebo-controlled trial administering oral AZI (20mg/kg bodyweight) at three time points to children attending EPI visits in Sierra Leone. A total of 20,560 infants attending the first EPI contact at around 6 weeks of age are recruited and randomised to AZI or placebo in a 1:1 ratio. The second and third AZI/placebo doses are given at 9 and 15 months of age. The primary outcome of the trial is all-cause mortality rate at 18 months of age assessed through mortality surveillance. Other trial outcomes include the impact on antimicrobial resistance, and on the immune response to certain key routine EPI immunisations, the safety of the intervention, the prevalence of SP resistance markers and the feasibility, and acceptability of adding AZI to the EPI program.
Discussion: The trial will provide the evidence needed to inform policy regarding the adoption and large-scale implementation of AZI in areas of high-mortality burden in sub-Saharan Africa.
Trial registration: ClinicalTrials.gov NCT04235816 Registered on 22 January 2020
Pan-African Clinical Trials Registry, PACTR202004540256535. Registered on 14 April 2020