bluuebunny/crossref_metadata_2025 huggingface dataset:
Hot deformation of ultrafine-grained TiC-reinforced AlCrFeNbMoTiV refractory high entropy alloys
Authors: Martin P.
Published: June 2023

Abstract. In the present work, the hot deformation behavior of the AlCr0.2FeNbMoTiV2 refractory high-entropy alloy was studied by means of its constitutive modeling. The samples were fabricated using mechanical alloying and spark plasma sintering, resulting in an ultrafine-grained microstructure consisting of a main bcc solid solution, Laves phase, and TiC and Al2O3 precipitates. Compression tests between 950 and 1100 ºC and 5·10-4 and 10-2 s-1 of strain rate were performed in order to determine the constitutive equations. Additionally, the samples were subjected to a heat treatment at 1350 ºC for 16 h, presenting a considerable increment in the specific yield strength (from 33 to 94 MPa·g-1·cm3 at 1000 ºC) accompanied by a slight increase of the grain size (from 0.35 to 1.2 µm). Overall, the heat-treated AlCr0.2FeNbMoTiV2 alloy presented one of the highest specific yield strength values among refractory high entropy alloys.
Deformation behaviour and microstructural evolution of high-entropy CoFeMnNi alloy at hot deformation condition with low strain rate
Authors: Du L.
Published: June 2023

Abstract. High-entropy alloy is a promising structural material for high-temperature service applications due to the designable superior properties. Superplasticity, normally achieved at relatively high temperature and low strain rate, enables difficult to formation materials to manufacture complex-shaped parts. This paper presents a feasibility experimental study on the deformation and microstructure of CoFeMnNi high-entropy alloy under hot deformation conditions with low strain rate. A series of hot uniaxial tests were conducted at the temperature range between 800-1000℃ with typical strain rates of 10-4 and 10-5/s to determine the stress-strain behaviours. Additionally, to understand the deformation mechanism, microstructure evolution after deformation was characterized. Finally, a mechanism based constitutive model of high-entropy alloy was developed, which facilities the process optimization by finite element simulations.
Numerical simulation and experimental trials on superplastic forming for thin-walled structure of Ti2AINb alloy
Authors: Zhang N.
Published: June 2023

Abstract. The difficult formability of Ti2AlNb alloy leads to the difficulty of traditional manufacturing methods to form the complex thin-walled components, limiting the wide application of Ti2AlNb alloy in aerospace. In this paper the superplastic forming process of Ti2AINb alloy with thin-walled structure was studied. The superplastic tensile tests of Ti2AINb alloy were carried out at varying temperature ranging from 920℃ to 980℃ and strain rate ranging from 0.001s-1 to 0.03s-1. The effect of the deformation-temperature and strain rate on the superplastic deformation behaviour was analysed, showing that the flow stress and elongation increase with the increasing temperature and the flow stress decreases, the elongation increases with the decrease of the strain rate. The elongation reaches the maximum value of 525% at the temperature of 940℃ and the strain rate of 0.001s-1. The constitutive equation taking into account the effect of strain was developed, which was implemented into the FE-based software Abaqus to simulate the superplastic forming of the thin-walled structure. The optimal values of the slab thickness and loading pressure-time curve were obtained by simulation and the superplastic forming tests of thin-walled structure were performed. The comparison between the numerical and experimental data with regard to thickness variation verified the accuracy of the finite element model. The research results provide a reference basis for the preparation of complex thin-walled structures of Ti2AINb alloy in aerospace.
Analysis of the Implementation of Protection for Victims of Domestic Violence in Indonesia
Authors:   Policy Implementation, Protection, Domestic Violence, Puspawati Ani Agus , Sutiyoso Bambang Utoyo , Suchmasasi Yudha
Published: June 2023

Domestic violence in Indonesia is viewed as a form of human rights violation and discrimination act. The Indonesian Government has issued Law Number 23 of 2004 concerning the Eradication of Domestic Violence. One of the objectives of eradicating domestic violence is to protect the victims. The protection is intended to provide a sense of security and safety for the victims. This study focuses on the implementation of protection for victims of domestic violence. This is literature research with a descriptive qualitative approach. The result shows that the implementation of protection for victims of domestic violence is carried out through collaboration between stakeholders following their respective duties and responsibilities. The problems often occurring are the not-very-responsive attitude of law enforcement officers in providing services; the insufficient available resources; the poor awareness of citizens in reporting domestic violence experienced or witnessed, which resulted in many domestic violence cases being unknown; hence law enforcement officers cannot provide protection.
Ethics and Behavior of Bureaucracy In Support Strengthening Good Governance
Authors:   Universitas Riau, Hidayati Zura
Published: June 2023

Bureaucrats' ethics and behavior are important aspects in referring to the implementation of good governance functions. This study aims to examine and find out whether the ethics and behavior of the apparatus is really able to provide reinforcement to the implementation of good governance. The method used in this paper is Descriptive Method with desk study study analysis, which is a study of the description of theories, concepts, or research results related to the focus of the study. The results showed that the ethics and behavior of bureaucrats play a role in shaping bureaucratic values and can strengthen the concept of governance in a government.
Can Authentic Leadership Increase Volunteerism in Fire Disaster Management?
Authors:   Department of Public Administration Faculty of Administrative Science Brawijaya University, Indonesia, Hidayati Firda
Published: June 2023

There is few researchers study on factors to influence volunteer to dedicate on the collaboration in fire disaster management which shape more effective fire disaster management. Interestingly, we found that although the fire disaster management is managed under a small unit, the outcomes of the Magelang District fire prevention technical unit are overwhelming. The key is authentic leadership to shape community involvement and volunteerism as well as government officials and private sectors to join collaboration. The leader introduced the incentive to join the collaboration as well as institutional arrangement both internal and external institutions that in the short term push significant trust to enhance the effectiveness of fire disaster management. It is the persistence, example and risk taking as well as personal knowledge on fire management and regulation of the head of unit that lead to eagerness of the volunteers to work beyond duty.
Performance Management Systems (PMS): Challages and Opportunities in the Public Sector
Authors:   University of Zululand, Thusi Xolani , Jili Nokukhanya N , Adetiba Toyin C , Mlambo Victor H , Mkhize Nkosingiphile
Published: June 2023

To the vast majority of scholar’s public institutions should have effective and efficient Performance Management Systems (PMS) in place to promote and develop the performance of civil servants. In the public sector, good management of staff performance is fundamental to efficient service delivery. The mandate of public institutions is to offer quality and effective service delivery to the public; as a result, public institutions' performance is scrutinized by the public, who have higher expectations from the government. These expectations are based on the votes cast and the taxes paid by the general public. Thus, public institutions should monitor and enhance each employee's performance and productivity to ensure the efficient provision of public services. This article seeks to analyse the challenges encountered by public sector in executing PMS and suggest the strategies the public sector can use to enhance staff performance.
Tradução, adaptação e validação do conteúdo do instrumento de avaliação Preschooler Awareness of Stuttering Survey para o português europeu
Authors: Soares Elsa , Leal Gonçalo , Belchior Catarina , Mendes Sara , Valente Ana Rita
Published: June 2023

Reações emocionais negativas e mudanças de autoperceção poderão ser experienciadas por crianças que gaguejam em idade pré-escolar. Estas informações são essenciais à avaliação e à intervenção em terapia da fala. Contudo, apenas existe traduzido para o português europeu (PE) o instrumento Scale of Children’s Atittudes (A-19), de Guitar e Grims (1977). O objetivo deste trabalho passa pela tradução, adaptação e validação do conteúdo do instrumento de avaliação Preschooler Awareness of Stuttering Survey (PASS), de Abbiati et al. (2013), do inglês para o PE. Utilizou-se uma metodologia qualitativa descritiva transversal e os procedimentos empregues foram: tradução, retrotradução e realização de painel de peritos (Sousa & Rojjanasrirat, 2011). Na tradução verificaram-se diferenças entre a versão original e a versão traduzida quanto às equivalências semântica e idiomática de conceitos e expressões (Borsa et al., 2012). Além disso, verificou-se a necessidade de incluir nova informação para promover a compreensão da aplicabilidade do instrumento. Na retrotradução, constatou-se a utilização de sinónimos dos conceitos/expressões da versão original, mantendo-se o mesmo tipo de estrutura frásica. O painel de peritos focou-se na equivalência concetual dos itens das folhas de registo do instrumento. Considerou-se que os conceitos se mantiveram preservados, os itens compreensíveis e a tradução do instrumento adequada à população-alvo pretendida. A continuação desta investigação pretende fornecer aos terapeutas da fala um novo instrumento que auxilie a avaliação de crianças que gaguejam em idade pré-escolar, contribuindo para uma avaliação fidedigna que potencie a intervenção terapêutica de acordo com as características e necessidades de cada criança.
Achromotrichia due to hypocupremia in a dog
Authors: De Bosschere H. , Platteeuw A.-S. , Vander Stichele V.
Published: June 2023

A five-year-old, intact, female, brown Labrador retriever was presented for loss of hair color (achromotrichia). Clinical and blood examinations revealed no significant abnormalities, except for a considerably reduced serum copper measurement. This has been described in dogs and cattle as achromotrichiosis due to hypocupremia. Interference of intestinal copper absorption due to an increased lead concentration in the drinking water was assumed to be the cause. The dog’s haircoat became brown again after serving tap water as drinking water and adding a copper supplement.
HAVA ARAÇLARI İÇİN DEĞİŞKEN AKILI RELÜKTANS GENERATÖR TASARIMI
Authors: GÜRLEYEN Hilmi
Published: June 2023

Elektrifikasyonu artırılmış hava araçları kavramı, hava araçlarında kullanılan mekanik, pnömatik ve hidrolik sistemlerin mümkün olduğunca elektriksel sistemlere dönüştürülmesini hedefler. Böylece yüksek verimli, daha az bakım gerektiren ve daha hafif sistemler kullanarak yakıt tasarrufu sağlamak hedeflenir. Bu sistemlerde generatör önemli bir rol oynamaktadır. Bu çalışmada hava araçları için değişken akılı relüktans generatör (DARG) tasarımı yapılmıştır. Öncelikle hava araçlarında kullanılan değişken hızlı-değişken frekanslı elektrik üretim mimarisi anlatılmıştır. 12/10 topolojiye sahip bir DARG’ın çalışma prensibi analiz edilmiş ve dinamik denklemleri verilmiştir. Rotor pozisyonuna bağlı endüktans değişimleri incelendiğinde DARG’ın yapısal olarak anahtalamalı relüktan generatör (ARG)’ye benzemesine rağmen moment üretim mekanizması bakımından silindirik rotorlu bir senkron generatöre benzediği görülmüştür. Fazör diyagramından yararlanarak tam yük altında ve 0.85 geri güç faktöründe çalışabilmesini sağlayacak toplu parametreler elde edilmiştir. Hesaplanan toplu parametrelere uygun bir tasarım yapılmıştır. Tasarım ve analiz sırasında Ansys/Maxwell’den yararlanılmıştır. Tasarımı yapılan generatörün terminal geriliminin harmonik analizi yapılmış ve bozulma faktörünün %2.16 olduğu görülmüştür. Yapılan analizler neticesinde, 12/10 DARG’ün üç seviyeli senkron generatöre alternatif olabilecek, daha ucuz ve daha basit bir generatör olduğu görülmüştür.
STATISTICAL ANALYSIS OF NOISE EXPOSURE OF WORKERS IN THE UNDERGROUND MINING IN THE SOMA BASIN OF TURKEY
Authors: TEKİN Ayla , NALBANT Mustafa Oğuz , ORHAN Mustafa , TEKİN Fırat , SUVAYDAN Fatih , BERKİ Kemal , GÜMÜŞ Sami , SAVRAN Aslı Aydın
Published: June 2023

It is known that the problems created by noise cause numerous psychological, social, and various health consequences in many environments. One of the environments where noise exposure is observed most effectively is work areas. Recently, the number of studies on the effects of occupational noise exposure on worker performance and health has increased globally. In this study, it was aimed to determine the effect of exposure to noise on the cardiovascular system. The effects of the noise in the working environment of 100 workers who work or will work in the underground mining sector were examined. Physiological signals such as blood pressure, oxygen saturation, heart rate, respiratory rate, and electrical activity of individuals were measured. The obtained data were analyzed statistically. Our study statistically suggests that noise is a cardiovascular risk factor. It can be assumed that cardiovascular changes are related to noise levels and exposure time, and these effects may also be due to individual susceptibility. In conclusion, the results obtained from this study show the existence of cardiovascular problems in workers working in underground mines and the usefulness of cardiology screening for workers working in this sector.
ANALYSIS OF COULOMB STRESS TRANSFER AND EARTHQUAKE HAZARD IN THE ÇALDIRAN FAULT ZONE AND ITS ADJACENT REGION
Authors: ALKAN Hamdi , ÖZTÜRK Serkan , AKKAYA İsmail
Published: June 2023

Çaldıran fault zone (CFZ) are significant seismically active zone that generated many destructive earthquakes. In this fault system, the last of these major earthquakes occurred on 1976 (Ms = 7.3). Therefore, based on the seismotectonic b-value, earthquake probability, recurrence times and Coulomb stress changes, we investigate the future earthquake potential and positive/negative stress changes in this fault zone. The events with a magnitude greater than 3.6 are used to investigate stress transfer direction regarding the seismotectonic parameters. The results indicate that the regions having smaller b-values are obtained along with the SE of CFZ, whilst higher b-values are calculated around the east of Lake Van. On the other hand, the northeast of CFZ represents current stress accumulation. Similarly, the Coulomb stress variations of 1976 earthquake show that stress accumulated at different depths in the northwest of this fault system. In addition, considering the long-term slip rates and horizontal offset in previous studies, the recurrence time of earthquakes has approximately 302 years for a magnitude greater than 6.0. Finally, these comprehensive analyses explain the implications of seismic hazard evaluation and forecasting of possible next earthquake occurrences in this region.
A RESIN TYPE ADDITIVE USE TO IMPROVE LOAD BEARING CAPACITIES OF GROUTED ROCK BOLTS EXPOSED TO THERMAL CYCLES
Authors: KÖMÜRLÜ Eren
Published: June 2023

A thermoset PMS (Polyvinyl modified silicone) type polymer additive effect on load bearing capacities of cement grouted rock bolt specimens exposed to thermal cycles was investigated with a series of experimental studies. The additive used in this study was in liquid phase while adding into the fresh cement mix and started to solidify by polymerization after being mixed well in the cement grout. The silicone based thermoset product was selected to use because of its ability of polymerization in contact with water. According to the results of this study, the load bearing capacity loss due to thermal cycles was found to be notably limited as a result of using the thermoset additive. Therefore, the additive tested in this study was assessed to improve resistivities of the cement grouted rock bolts against the thermal changes.
Worldwide Distribution and Extracutaneous Manifestations of Henoch-Schönlein Purpura in Adults: Narrative Review (Preprint)
Authors: Harris Blair W , Maxfield Luke , Hunter Abigail , Alhajj Mandy , Ban Byung , Pulsipher Kayd J
Published: June 2023

BACKGROUND

Henoch-Schönlein purpura (HSP), a leukocytoclastic small vessel vasculitis, exhibits both cutaneous and systemic manifestations. While predominantly observed in childhood, it may manifest in adults with more pronounced systemic involvement. Furthermore, HSP is a global phenomenon showcasing epidemiological and systemic variances.

OBJECTIVE

This study aims to scrutinize extracutaneous manifestations in adults with HSP, discerning distinctions according to geographical regions on a worldwide scale.

METHODS

A comprehensive search encompassing PubMed, Embase, Cochrane Library, and Web of Science was executed, covering papers published from January 1, 1970, to December 1, 2019. Keywords used included “Henoch-Schönlein purpura,” “henoch schonlein purpura+adult,” “IgA vasculitis+adult,” “HSP+adult,” and “IgAV.” A total of 995 publications were identified, from which 42 studies encompassing 4064 patients were selected, with a predominant focus on cases reported in Asia, Europe, and the Americas.

RESULTS

Among adults afflicted with HSP, European patients exhibited a higher propensity for male predominance (P<.001), gastrointestinal involvement (P<.001), and musculoskeletal complications (P<.001). Conversely, patients from the Americas were least likely to experience genitourinary involvement (P<.001).

CONCLUSIONS

HSP demonstrates a variance in distribution and extracutaneous manifestations within distinct geographical boundaries. In the adult population, European patients exhibited a higher prevalence of male gender and gastrointestinal and musculoskeletal involvement. Asian patients were more predisposed to genitourinary involvement when compared to their American counterparts. The establishment of prospective studies using standardized reporting measures is imperative to validate the relationships unveiled in this investigation.
Random effects adjustment in machine learning models for cardiac surgery risk prediction: a benchmarking study (Preprint)
Authors: Dong Tim , Sinha Shubhra , Fudulu Daniel , Chan Jeremy , Zhai Ben , Narayan Pradeep , Caputo Massimo , Judge Andy , Dimagli Arnaldo , Benedetto Umberto , Angelini Gianni
Published: June 2023

BACKGROUND

There is an ongoing debate over whether a procedural specific (e.g. Society of Thoracic Surgeons (STS)) or universal model (e.g. EuroSCORE II (ES II)) should be used for patient selection in cardiac surgery. Recently, we showed that ES II suffers from severe performance drift across several important metrics and that ML approaches such as Xgboost and Random Forest are substantially more resistant to dataset drift.

OBJECTIVE

With the growing interest in big data and its leverage through the use of ML approaches that are not limited by linear statistical assumptions, the number of clinical variables can theoretically increase exponentially. In addition, the variations and residual confounding that historically hindered the usefulness of cardiac risk stratification scores can potentially be taken into account. Here, we assess these possibilities on a large United Kingdom (UK) database.

METHODS

A retrospective analysis of prospectively routinely gathered data on adult patients undergoing cardiac surgery in the UK between 2012-2019. We temporally split the data 70:30 into a training and validation subset. Two sets of seven ML mortality prediction models, with and without variable selection were assessed for consensus Clinical Effective Metric (CEM) overall performance and performance within each of CEM9s consistuent metrics. Confounding and potential causal relationships between covariates and outcomes were evaluated using bayesian network analysis.

RESULTS

A total of 227,087 adults underwent cardiac surgery during the study period with a mortality rate of 2.76%. For non-variable selected (NVS) risk scores with 102 variables, Xgboost with adjustment for hospital variation was superior to the Xgboost without adjustment (p < 2e-16). Both NVS and the 18 variables selected (VS) Xgboost with adjustment for hospital variation risk scores were superior to the Xgboost (ES II 18 variables) model (p < 6.3e-15), with NVS Xgboost with adjustment for hospital variation having the best performance, followed by the VS Xgboost with adjustment for hospital variation (CEM Difference: 0.0150 and 0.0023, respectively).

CONCLUSIONS

We have identified an ML adjusted risk score comprising 102 variables that increases risk stratification performance on hold out dataset, removing the need to perform variable selection and reduction. This paves the way for further research that utilises this new set of variables with hospital-based adjustments for the safer selection of patients undergoing cardiac surgery.

INTERNATIONAL REGISTERED REPORT

RR2-https://doi.org/10.1101/2023.06.08.23291129
Use of Facebook Campaigns to Reach Diverse Populations (Preprint)
Authors: Jones Lenette M. , Monroe Korrey E. , Tripathi Priya , Bashshur Mary J. , Chapman Paige T. , Chapman Paige T.
Published: June 2023

BACKGROUND

Previous studies report that recruiting diverse populations, such as African American/Black (Black) women, is “difficult,” yet some investigators may not have considered alternative recruiting methods for different groups. In contrast, other studies have reported success in reaching targeted groups through Facebook campaigns.

OBJECTIVE

To describe the development and implementation of a Facebook campaign to recruit Black women with hypertension for health research.

METHODS

We created a Facebook campaign to recruit Black women. First, we searched for images we deemed appropriate and visually appealing for our population. Next, we developed captions to correspond with each image we selected. The images and text together formed our advertisements. Then, we uploaded our advertisements to the campaign. Lastly, we developed a study description and screening survey. When individuals clicked on an advertisement, they reviewed study-specific information and responded to eligibility questions.

RESULTS

We launched our campaign with four advertisement sets in June 2020. By December 2020, the campaign generated 186,751 impressions, reached 66,880 users, and lead to 1,694 clicks on our advertisements. The cost ranged from $.40-$.94 per click. Of 214 individuals who responded to the screener, 137 were eligible to participate in our study.

CONCLUSIONS

We used a Facebook campaign with representational images to recruit Black women for our research study on self-management and blood pressure control. Monitoring our advertisements' performance frequently helped us budget and determine if changes were needed. The strategies outlined in this report can guide scientists in using Facebook to recruit other diverse populations for health research.
Associations between variables in a cohort of Mexican COVID-19 patients: A network approach (Preprint)
Authors: Martínez Octavio
Published: June 2023

BACKGROUND

Here we analyze a vast cohort comprising over 25 million COVID-19 patients collected by the Mexican Government between 2020 and 2023. The dataset contains valuable information on attributes and comorbidities, enabling us to investigate clinically relevant associations.

OBJECTIVE

Our objective is to unravel the intricate network of relationships between variables within the entire cohort and specific patient subsets, with a particular focus on associations involving fatalities.

METHODS

We employ the Odds Ratio (OR), estimated from Fisher’s test on 2×2 contingency tables, as a measure of association between variable pairs. We compute a total of 3,899 such measures by examining all possible variable pairs within 25 patient groups. The results are ordered and presented as networks, where variables are depicted as nodes (vertices) and associations at a specific OR threshold are represented as links (edges). The recoded data, along with the results and data mining functions, are publicly accessible.

RESULTS

Our findings demonstrate that hospitalization, gender, and age significantly influence disease outcomes, as do comorbidities such as pneumonia, chronic renal problems, diabetes, and hypertension. Interestingly, we observe that the associations of comorbidities are diminished in pregnant women, suggesting a pro- tective effect of pregnancy against the detrimental impact of these comorbidities on COVID-19 patients.

CONCLUSIONS

Our analysis of variables in Mexican COVID-19 patients reveals a complex network of associations. By visualizing these associations as networks, we provide a clear and accessible representation that enhances our understanding of the factors contributing to fatalities in this population.
Nghiên cứu quy trình trích ly dịch chiết thô lá chuối già (Musa paradisiaca L.) và khảo sát hoạt tính sinh học của dịch chiết đối với sâu tơ (Plutella xylostella)
Authors: Nguyễn Thị Việt Huỳnh , Huỳnh Tuyết Đào , Nguyễn Quốc Châu Thanh , Nguyễn Trọng Tuân , Hồ Ngọc Tri Tân , Đặng Huỳnh Giao
Published: June 2023

Hằng năm, ngành nông nghiệp đã sử dụng rất nhiều biện pháp khác nhau để xử lý sâu bệnh gây hại. Trong đó, các loại chế phẩm sinh học luôn được ưa chuộng vì bảo vệ môi trường, an toàn cho người sử dụng và hạn chế ngộ độc nông sản. Nghiên cứu đã xây dựng thành công quy trình trích ly dịch chiết thô lá chuối già (Musa paradisiaca L.) bằng phương pháp ngâm trích và khảo sát khả năng diệt trừ sâu tơ (Plutella xylostella) của dịch chiết. Kết quả khảo sát các yếu tố ảnh hưởng đến quá trình ngâm trích đã đưa ra các điều kiện tối ưu như dung môi ngâm là ethanol 99%; tỉ lệ rắn- lỏng là 1:5 (g/mL) và thời gian ngâm là 24 h. Bên cạnh đó, nghiên cứu đã sử dụng phương pháp định tính hóa học và sắc ký khí ghép phối phổ (GC-MS) chứng minh sự hiện diện của alkaloid trong dịch chiết. Ngoài ra, hiệu quả tiêu diệt sâu tơ tốt nhất được ghi nhận tại nồng độ cao chiết với nồng độ 30 g/L sau 35 phút phun trong điều kiện nhiệt độ môi trường.
Chế tạo thiết bị vi lỏng trên nền giấy bằng máy in laser
Authors: Ngô Bảo Chân , Dương Thị Hồng Nhung , Huỳnh Huỳnh Anh Thi , Đỗ Châu Minh Vĩnh Thọ
Published: June 2023

Thiết bị vi lỏng trên nền giấy (μPAD) mang lại bước đột phá trong phân tích mẫu nhanh và phân tích tại hiện trường. Đây là lần đầu tiên có nghiên cứu sử dụng loại mực CF279A trong chế tạo thiết bị μPAD, điều này giúp mở rộng phạm vi cũng như cung cấp các bằng chứng vào số lượng ít các nghiên cứu chế tạo thiết bị μPAD bằng máy in laser. Giấy lọc 102 được sử dụng, sau khi in bằng máy in laser, khuôn  sẽ được gia nhiệt ở tủ sấy với nhiệt độ 150ºC để hình thành các vùng ưa nước và kỵ nước. Thiết bị μPAD chế tạo có độ rộng kênh kỵ nước và ưa nước lần lượt là 1,0 mm và 0,4 mm trở lên. So với một số nghiên cứu bằng các phương pháp khác như in đóng dấu, in bàn thủ công cho độ phân giải cao hơn
Ảnh hưởng của phụ gia đến sự thay đổi tính chất hóa lý thịt cá xay từ cơ thịt sẫm cá ngừ (Thunnus albacares) theo thời gian bảo quản ở 00C±1
Authors: Nguyễn Hồng Ngân , Nguyễn Thế Nguyên , Đinh Văn Hiện , Nguyễn Trọng Bách
Published: June 2023

Nghiên cứu này khảo sát ảnh hưởng của tinh bột biến tính (TBBT) và protein đậu nành (soy protein concentrate-SPC) đến độ cứng, tỷ lệ hao hụt trọng lượng, sự co rút kích thước, sự biến đổi chỉ tiêu TBARS và TVB-N của gel protein thịt cá xay trước và sau khi gia nhiệt được bảo quản ở nhiệt độ 00C± 1. Kết quả cho thấy khi bổ sung TBBT hay SPC với tỷ lệ là 6% giúp gel protein thịt cá xay cải thiện được cấu trúc; tỷ lệ hao hụt trọng lượng của gel protein sau khi gia nhiệt tăng lên khoảng 5-8% (TBBT) và 10-15% (SPC); sự co rút kích thước tăng dao động từ 5 đến 7,5% cho cả gel bổ sung TBBT hay SPC sau 15 ngày bảo quản ở 00C± 1. Chỉ số TBARS và TVB-N tăng không đáng kể trong thời gian bảo quản dưới 9 ngày cho cả hai loại gel bổ sung TBBT và SPC.
Các nhân tố tác động đến hiệu quả học trực tuyến của sinh viên Trường Kinh tế, Trường Đại học Cần Thơ
Authors: Phạm Lê Hồng Nhung , Bành Ngọc Trâm , Đinh Công Thành
Published: June 2023

Trường Đại học Cần Thơ đã sử dụng hình thức học tập trực tuyến và rất quan tâm đến hiệu quả của hình thức học tập này. Nghiên cứu này được thực hiện nhằm giúp Trường Kinh tế, Trường Đại học Cần Thơ triển khai hình thức học tập trực tuyến hiệu quả hơn. Mục tiêu của nghiên cứu này là xác định các nhân tố ảnh hưởng đến hiệu quả học tập trực tuyến của sinh viên Trường Kinh tế, Trường Đại học Cần Thơ. Dữ liệu được thu thập từ 155 sinh viên đã tham gia học trực tuyến. Công cụ phân tích Cronbach’s Alpha, phân tích nhân tố khám phá (EFA) và phân tích hồi quy đa biến được sử dụng trong nghiên cứu. Kết quả nghiên cứu cho thấy có bốn nhân tố quan trọng tác động tích cực đến hiệu quả học tập trực tuyến của sinh viên, bao gồm (1) Việc thiết kế khóa học, (2) Tài liệu học tập, (3) Sự tương tác giữa giảng viên và sinh viên, và (4) Sự tương tác giữa sinh viên và sinh viên. Trong đó, nhân tố thiết kế khóa học có sự tác động đáng kể nhất đến hiệu quả học tập trực tuyến của sinh viên. Dựa vào kết quả nghiên cứu, một số giải pháp được đề xuất nhằm nâng cao hiệu quả học trực tuyến cho người học.
Thực trạng và giải pháp nâng cao hiệu quả tiếp nhận truyện dài và phim điện ảnh chuyển thể từ truyện dài của Nguyễn Nhật Ánh
Authors: Nguyễn Thị Kiều Oanh , Nguyễn Thị Mỷ Ly , Hà Hoàng Thái , Nguyễn Thị Diễm My , Trương Lâm Huỳnh Anh
Published: June 2023

Với bút lực dồi dào cùng niềm đam mê văn chương mãnh liệt, Nguyễn Nhật Ánh không ngừng làm phong phú thêm cho mảng văn học viết về thanh thiếu nhi Việt Nam. Truyện dài của Nguyễn Nhật Ánh không chỉ ảnh hưởng đến những người yêu văn chương mà còn có sức lan tỏa đến đời sống xã hội khi được chuyển thể thành phim điện ảnh và được đông đảo công chúng yêu thích, săn đón. Đề tài sử dụng kết hợp các phương pháp như phân tích - tổng hợp, thống kê - phân loại, khảo sát - điều tra xã hội học, phương pháp so sánh và phương pháp nghiên cứu liên ngành nhằm nghiên cứu thực trạng tiếp nhận truyện dài và phim điện ảnh chuyển thể từ truyện dài của Nguyễn Nhật Ánh ở hai nhóm đối tượng chính là công chúng chuyên ngành và công chúng ngoài chuyên ngành Văn học. Từ đó, một số kiến nghị và giải pháp được đề xuất nhằm nâng cao hiệu quả tiếp nhận truyện dài và phim điện ảnh chuyển thể từ truyện dài của Nguyễn Nhật Ánh.
Các nhân tố ảnh hưởng đến phúc lợi của hộ gia đình nông thôn Việt Nam
Authors: Phan Văn Phúc , Nguyễn Thị Kim Ngân
Published: June 2023

Nghiên cứu về phúc lợi hộ gia đình luôn nhận được sự quan tâm của giới học thuật và các nhà làm chính sách. Bài viết này tập trung phân tích các yếu tố tác động đến phúc lợi hộ gia đình ở khu vực nông thôn Việt Nam giai đoạn 2006 – 2014. Trước hết, nghiên cứu lựa chọn chỉ số tài sản (asset index) làm đại diện cho phúc lợi hộ gia đình. Với cách tiếp cận như vậy, bên cạnh những yếu tố khác liên quan đến đặc điểm của hộ gia đình (như dân tộc, giới tính), nghiên cứu đã chỉ rõ những yếu tố chủ yếu ảnh hưởng phúc lợi bao gồm trình độ học vấn, lao động, diện tích đất canh tác, đa dạng các nguồn sinh kế và vốn xã hội. Kết quả này cho thấy cần phải có sự đầu tư tích cực của hộ gia đình và sự tạo điều kiện của chính phủ để cải thiện phúc lợi cho hộ gia đình ở nông thôn hiện nay.
The Effect of Cooperative Learning on Learning Motivation: A Meta-Analysis
Authors: Damayanti Eka , Nur Fitriani , Anggereni Santih , Taufiq Ainul Uyuni
Published: June 2023

Cooperative learning can increase students' learning motivation. Numerous studies have examined the effect of these models on students' motivation to learn. This meta-analysis study was designed to generalize the impact on science learning motivation in elementary, junior high, and senior high school students. This study aims to examine the effect of cooperative learning models on students' learning motivation at the elementary, junior high, and high school levels, as well as the difference in mean motivation scores between the control and experimental groups. This study was conducted using meta-analysis techniques. The data used in this study came from 13 previous studies. The data were then analyzed using descriptive and inferential statistics. The research findings revealed that the effect of the cooperative learning model on learning motivation at the junior high school level was greater than that at other educational levels. Additionally, there was no discernible difference in the mean motivation score between the experimental group using the cooperative learning model and the control group using the conventional learning model.
The Development of a Performance Validity Test (PVT) for Indonesia
Authors: Adhiatma Widhi , Hendriks Marc P. H. , Halim Magdalena S. , Kessels Roy P. C.
Published: June 2023

Neuropsychological tests are proliferating in Indonesia. So far, unfortunately, it is not accompanied by the development of a performance validity test (PVT). According to international neuropsychological standards, using PVTs is essential to determine the validity of the neuropsychological test results. To date, there is no single standardized PVT available in Indonesia. In this article, we describe (1) the concept of performance validity testing, (2) the detection strategy, and (3) the procedure of PVT. Furthermore, several factors which affect PVT failure and its implication on the interpretation of a neuropsychological assessment are discussed. Considering the importance of PVTs incorporation and that it has become a standard by some neuropsychological associations, it is crucial to develop PVTs in Indonesia. Finally, the utilization of PVT should be performed cautiously, as many factors might influence the PVT result.
ANTIMICROBIAL POTENTIAL OF HYDROGEL INCORPORATED WITH PLGA NANOPARTICLES OF CROSSANDRA INFUNDIBULIFORMIS
Authors: Jyothi Divya , Priya Sneh , James Jainey P
Published: June 2023

Objective: Present study is aimed at formulation of Hydrogel containing Poly Lactic Glycolic Acid (PLGA) nanoparticles incorporated with ethanolic extract of Crossandra infundibuliformis (EECI) and investigate the efficacy of hydrogel nanoparticles as a carrier of antimicrobial constituents.

Methods: Poly Lactic Glycolic Acid (PLGA) nanoparticles containing ethanolic extract of Crossandra infundibuliformis (EECI) were synthesized by an emulsion-evaporation method and their physicochemical properties were studied. Polymeric PLGA nanoparticles were then incorporated into gel matrix, using Hydroxy Propyl Methyl Cellulose (HPMC K4M) as a base. The antibacterial activity of nanoparticulated hydrogel formulations were evaluated by agar well diffusion method against Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa.

Results: Nanoparticulate hydrogel formulations exhibited high viscosity, neutral pH with good spreadability which is appropriate for transdermal application as well as showed prolonged drug release from optimized formulation up to 24 h. Nanoparticulate hydrogel formulations were effective inhibitors of all the micro-organisms with more promising activity against Staphylococcus aureus.

Conclusion: Nanoparticulate hydrogel formulation can be used as a feasible alternative to conventional formulations of Crossandra infundibuliformis extract with advanced permeation characteristics of antimicrobial constituents for transdermal application.
Recent trends in siRNA delivery for treatment of colorectal cancer
Authors: Momin Taihaseen , Harugale Satyajeet , Gulbake Anamika Sahu , GULBAKE ARVIND
Published: June 2023

Colorectal cancer (CRC) is the third most widespread cancer in the world. Currently, chemotherapy is effective treatment for CRC. Major problem with chemotherapy is the acquired multi drug resistance (MDR). Recently, siRNA (small interfering RNA) therapeutics has getting more attention to overcome the MDR in cancer and in various diseases. siRNA is a 21-23 base pair double stranded RNA having ability to silence specific genes at post transcriptional level. But, clinical practice of siRNA delivery having limitation due to enzymatic degradation by serum nucleases resulting poor stability, poor cellular uptake at target site. Now a days, development of various nanocarriers for efficient delivery of siRNA is a most challenging and rapidly growing research area. In this review, we summarize, the potential of various nanocarriers such as polymeric nanoparticles, lipid-based nanoparticles, inorganic nanoparticles, layered double hydroxide nanoparticles for siRNA delivery in colorectal cancer treatment.
Hotel Room Sales Strategies in the New Normal: Basis for Sustainable Operation
Authors: L. Mauricio Imeer Jeaisa , S. Mendoza Anastacia , M. Muyot Xena Rose , C. Ocampo Ara Venise , P. Pascual Marilou
Published: June 2023

The Hospitality industry is one of the largest and fastest-growing industries in the world. As the pandemic hits, many areas of the hospitality industry have been greatly affected. One of the major establishments that struggled is the hotels. This research study titled “Hotel Room Sales Strategies in the New Normal: Basis for Sustainable Operation”, aimed to identify the strategies of the hotels in terms of selling their hotel rooms in the new normal. Throughout the challenges, hotels created a way to remain on track and resume their operation. This research revealed that hotels in Cabanatuan City mostly utilized hotel group sales strategy, destination marketing sales strategy and guest reward sales strategy to increase hotel room sales as their basis for sustainable operation.
Vidas truncadas: muertes de personas migrantes centroamericanas en tránsito por México
Authors: Jasso Vargas Rosalba
Published: June 2023

Esta obra tiene como propósito presentar un estudio sobre la mortalidad de personas migrantes, provenientes del norte de Centroamérica, en territorio mexicano con principal énfasis en la frontera sur de México. Se busca cubrir cuatro campos fundamentales: el primero, identificar los principales espacios de estancias prolongadas durante el tránsito, el segundo, describir el comportamiento temporal y espacial de las muertes de centroamericanos en México; el tercero, describir las principales ausencias en las estadísticas de muerte; el cuarto, hacer una propuesta técnico-metodológico para el estudio de la mortalidad y finalmente, aludir a la relación entre las muertes y las estrategias de políticas de control migratorio.
El efecto del origen étnico en el mercado laboral mexicano: un análisis de la discriminación salarial en la población indígena
Authors: De la Luz-Tovar Christian , Samario-Zarate Jonathan
Published: June 2023

Bajo la hipótesis de que en México las diferencias salariales en contra de la población indígena se explican por la discriminación y subestimación de sus capacidades laborales, el presente estudio analiza la brecha salarial entre los trabajadores que se identifican como indígenas y aquellos que no. Con los datos de la Encuesta Nacional de Ingresos y Gastos de los Hogares de 2018 (ENIGH), se realizó la descomposición de Oxaca-Blinder y se encontró que la diferencia salarial en contra de los indígenas es del 36%. De ella, el 61% se explica por las características observables en los trabajadores, mientras que el 39% restante, se atribuye a otros elementos no observados, como la discriminación. Tanto las características sociodemográficas consideradas en el análisis estadístico de los dos grupos de trabajadores, como la parte no explicada de la brecha, sugieren un comportamiento discriminatorio en el mercado laboral mexicano.
Determinantes del nivel de efectivo en un grupo de emisoras de la Bolsa Mexicana de Valores
Authors: Gurrola Ríos César , Hernandez Vargas Carlos Javier , Ruiz Chávez Ramón
Published: June 2023

Desde los argumentos de Keynes sobre las funciones del dinero, las decisiones financieras de corto plazo, en especial el nivel de efectivo, es de interés por su impacto en el desempeño financiero de las empresas y en las expectativas de diversos agentes económicos. Evidencia previa sugiere que el nivel de efectivo depende de aspectos endógenos y exógenos, dentro de estos últimos cabría la pandemia por Covid-19, por su efecto en la dinámica empresarial. El presente estudio ofrece un análisis del comportamiento de los niveles de efectivo en una muestra de 29 emisoras que cotizan en la Bolsa Mexicana de Valores a partir de una serie de determinantes propuestos, evaluando el efecto que tuvo la pandemia en tal relación. Mediante un modelo para datos en panel se estudia el periodo entre el 1T2001 y el 1T2022. Los principales resultados del análisis realizado demuestran que la incertidumbre, el flujo y tamaño de las empresas son los factores de mayor impacto directo sobre el nivel de efectivo, mientras que la relación es inversa para el apalancamiento, la inversión en activos fijos y el comportamiento del mercado de capitales. Los resultados tienen implicaciones en las decisiones de inversión y financiamiento de administradores, inversionistas y reguladores.
Análisis espacial de la desigualdad salarial y la precariedad laboral en el sector turístico mexicano
Authors: Andrés Rosales Roldán , Mendoza González Miguel Ángel , Quintana Romero Luis
Published: June 2023

La desigualdad salarial y la precariedad laboral han sido objeto de estudio en las últimas décadas en México. Son problemas que se han generalizado más para las mujeres trabajadoras mexicanas en las Zonas Metropolitanas (ZMs) del país que para los hombres. Esta situación es aún más grave en el sector turístico, en donde el empleo formal es temporal y es altamente dependiente de los flujos de turistas. Mediante la estimación de un modelo econométrico de panel espacial y haciendo uso de la información de la Encuesta Nacional de Ocupación y Empleo de México, en este trabajo se presenta evidencia de que las mujeres son las que más predominan como fuerza laboral en el sector turístico y son también las que ocupan los empleos más precarios. Las mujeres perciben remuneraciones por debajo de dos salarios mínimos en las distintas ZM, mientras que los hombres obtienen más de tres salarios mínimos en el mismo sector. Aunado a lo anterior, los destinos que atraen a turistas internacionales y que son los mejores pagados, tienen también una predominancia de hombres, mientras que las mujeres son relegadas al resto de los destinos turísticos.
Incidencia de la educación y comunicación para la conservación del Parque Nacional Natural Tinigua (Colombia)
Authors: Pedraza Suárez Betty Rocío
Published: June 2023

En esta investigación, el autor determinó algunos aspectos de incidencia de los procesos e intervenciones en educación y comunicación para la conservación, desarrollados en el Parque Nacional Natural Tinigua en el periodo 2016-2020. Se usó una metodología cualitativa para conocer la percepción de los actores estratégicos del territorio respecto a la incidencia de los procesos de educación ambiental en los que han participado, a través de la aplicación de una encuesta semiestructura a una muestra de 30 personas. Como resultado, se observó una amplia cobertura de los procesos educativos en áreas urbanas fuera del área protegida, con un contenido temático muy apropiado a los objetivos de conservación; pero, una cobertura reducida en los centros educativos del área protegida. El lenguaje y guion tecnicista tradicional de la conservación no alcanza a irrumpir en los puntos de anclaje de las redes de comunicación social rural; este no trasciende a los esquemas conductuales y actitudinales, y genera baja incidencia en el marco de una comunicación bidireccional y educación continua. La violencia que aún persiste en el área de estudio, en la actual etapa del posconflicto, afecta la participación comunitaria necesaria en la construcción e implementación conjunta de estrategias de educación para la conservación de la naturaleza.
Exploring the World of Game Development: A Python-based Space Shooter Game
Authors: . Manuj
Published: June 2023

Abstract: This research paper discusses the development of a Space Shooter game using Python programming language. The objective of the game is to shoot and destroy alien spaceships while avoiding their attacks. The game is designed using Pygame,a Python module specifically created for game development. The paper begins with an introduction to the project, followed by a literature review of related work in game development using Python. The details of the project, including the game’s features, design, and code implementation, are then presented. The future scope of the project is discussed, highlighting potential improvements and enhancements. Finally, the paper concludes bysummarizing the project’s key findings and contributions. The development of a Space Shooter game using Python provides an exciting opportunity for game enthusiasts to explore the world of game development using a popular and versatile programming language. The result of coding a space shooter game is a fully functional and interactive game where players control a spaceship to combat enemy ships in a dynamic space environment. Players can move theirspaceship horizontally, shoot projectiles, and avoidobstacles. The game features multiple levels, increasing difficulty, and keeps track of scores and lives. The graphics and animations are rendered, creating an immersive space-themed experience. Collision detection accurately detects when projectiles hit enemies or obstacles, providing a satisfying gameplay experience. The game includes game over conditions and allows players to restart or quit, providing a complete and enjoyable gaming experience
A Study on Effect of Mustard Husk Ash on Properties of Porous Concrete
Authors: Kumar Er. Ravi , Sood Dr. Hemant
Published: June 2023

Abstract: Mustard Husk Ash (MHA), a by-product of the mustard oil extraction process, has gained attention as a potential supplementary cementitious material in the construction industry. The incorporation of MHA in porous concrete offers the dual benefits of waste management and sustainable construction practices. The environmental advantages of utilizing MHA, such as reducing landfill waste and conserving natural resources. The review paper synthesizes the findings from various research studies that have investigated the influence of RHA on the properties of porous concrete. The impact of different percentages of Rice Husk Ash (RHA) as a partial replacement for cement is analysed. The fresh and hardened properties of porous concrete, including workability, compressive strength, water absorption, and porosity, are examined in light of the incorporation of RHA. The review paper identifies key trends and observations from the existing literature. It discusses the influence of water content and size of coarse aggregates on the performance of RHA-based porous concrete. It also addresses the challenges and limitations associated with the use of RHA, such as its effect on the water demand and workability of concrete mixes. By synthesizing the collective findings, the review paper provides valuable insights into the effectiveness and feasibility of RHA as a sustainable alternative in porous concrete production. It identifies knowledge gaps and areas for further research, emphasizing the need for long-term durability studies and performance assessments on MHA based on porous concrete under different environmental conditions. In conclusion, this review paper contributes to the understanding of the effect of mustard husk ash on the properties of porous concrete. It underscores the potential of MHA as a viable option for enhancing the sustainability and performance of porous concrete. The comprehensive analysis serves as a valuable resource for researchers, engineers, and practitioners seeking to explore the application of MHA in porous concrete and promote environmentally friendly construction practices.