bluuebunny/crossref_metadata_2025 huggingface dataset:
Strategies for closing the posterior rectus sheath during enhanced view totally extraperitoneal Rives-Stoppa repair
Authors: Baig Sarfaraz Jalil , Gandhi Jignesh A. , Gajjar Aarsh P. , Priya Pallawi , Sane Devashree
Published: September 2023

Introduction:

The popularity of endolaparoscopic extraperitoneal repairs has been on the rise due to advantages such as sublay mesh placement and early return to daily activities. However, the procedure requires overcoming a learning curve, and with increased adoption, new complications have emerged. One significant complication is the rupture of the posterior rectus sheath (PRS). In this article, we present our modifications of the technique to reduce tension during PRS closure.

Patients and Methods:

The study included 105 patients who underwent endolaparoscopic extraperitoneal repairs for ventral hernias using two different techniques. Group A (n = 68) underwent the original technique, whereas Group B (n = 37) underwent the modified technique. The modifications in Group B included preserving the peritoneal bridge between the two PRS and the hernia sac, conducting a complete dissection of the space of Bogros and adopting a transverse or oblique closure of PRS along the lines of least tension. To assess the efficacy of these modifications in preventing PRS rupture, we compared the results of both groups.

Results:

Our findings indicate that following all the technical steps of the modified technique resulted in a reduced need for transversus abdominis release for PRS closure and a lower incidence of PRS rupture in the postoperative period. However, to further validate the effectiveness of these modifications, a larger follow-up period and a bigger sample size are required.

Conclusions:

The adoption of the modified technique can help achieve a tension-free PRS closure.
Feasibility and safety of redo laparoscopic repair of recurrent inguinal hernia following previous endolaparoscopic repair
Authors: Shenoy K. Ganesh , Makam Ramesh
Published: September 2023

Background:

Laparoscopic redo inguinal hernia (LRIH) repairs are fraught with challenges as the pre-peritoneal space is violated due to previous surgery and the presence of mesh. The purpose of this study was to present the feasibility and safety of LRIH in a series of patients with recurrent inguinal hernia following previous endolaparoscopic repair and present technical experiences and clinical outcomes in this subset of patients.

Patients and Methods:

This was a retrospective study from a prospective database of 16 patients who underwent LRIH between March 2014 and December 2020. The decision to do a redo laparoscopic surgery was undertaken after a detailed discussion with the patient. The operative details, challenges faced and tips to overcome difficulties have been explained in detail.

Results:

Out of 16 patients (mean age 49.5 years, all men), 15 underwent laparoscopic redo trans-abdominal pre-peritoneal (TAPP) mesh repair and 1 underwent laparoscopic enhanced-view totally extra-peritoneal (eTEP) mesh repair. The mean operating time was 68.5 min for unilateral, 115 min for bilateral TAPP and 90 min for eTEP. The main contributing factors for recurrences were mesh migration, insufficient size of the mesh and inadequate fixation. There was no conversion to open repair. The duration of stay was 1–2 days. There was no documented re-recurrence during the follow-up period of 2–9 years.

Conclusion:

Based on our experience, redo laparoscopic inguinal hernia mesh repair after previous endolaparoscopic repair is feasible, effective and safe in experienced hands.
Long-term outcomes of laparoscopic longitudinal pancreatojejunostomy and modified Frey’s procedure for patients of chronic pancreatitis: A 10-year experience
Authors: Rege Sameer , Banker Amay , Shah Sulay , Bhesania Dhaval
Published: September 2023

Introduction:

To mitigate the morbidity associated with open procedures for chronic pancreatitis (CP), there is a paradigm shift towards the laparoscopic approach. However, since these procedures are technically demanding, literature is still limited. We present our experience and long-term outcomes in the management of CP with laparoscopic surgical procedures.

Patients and Methods:

This is a retrospective observational study of patients who underwent a laparoscopic surgery for CP between 2009 and 2019. Pain scores using the Visual Analogue Scale (VAS) were compared pre- and postoperatively. In patients with diabetes, the pre- and post-operative insulin requirement was compared.

Results:

Data of 62 patients were analysed. The mean duration of follow-up was 69 (±22) months. All patients had pain relief post-surgery. The relief of pain was sustained, with the median VAS scores being 1 at 3- and 5-year follow-up. There was a decrease in the median insulin requirement of diabetic patients, which was significant at 3-month and 1-year follow-up (P < 0.05).

Conclusion:

Our study demonstrates that laparoscopic surgical procedures offer long-term pain control with low morbidity. Effective ductal decompression may result in a short-term improvement of the endocrine function of the gland.
What is the ideal preconditioning time to reduce laparoscopic-induced oxidative stress?
Authors: Yazicioglu Murat Burc , Eraldemir Fatma Ceyla , Gunes Abdullah , Turgut Hamdi Taner , Ciftci Ali
Published: September 2023

Introduction:

Ischaemic preconditioning is the most effective method for the prevention of ischaemic-reperfusion injury; however, no study has examined the question of the ideal time for ischaemic preconditioning.

Patients and Methods:

The patients were divided into five groups, each group including of 20 patients. The precondition was applied as 1, 5, 10 and 15 min in Groups I, II, III and IV and Group V was the control group. Repeated blood samples were taken to measure the total antioxidant status (TAS), total oxidant status and oxidative stress index (OSI) values, just before insufflation, at the end of the operation and at 6 and 24 h of the post-operative period.

Results:

A significant difference was observed between the TAS values at the end of the operation and at the sixth post-operative time of the four groups (P = 0.001, 0.000, 0.001, 0.019 and 0.033, respectively). Furthermore, a significant difference was observed between TAS values at the post-operative 24th h of Group III and Group V, and also a significant difference was observed between the OSI values at the post-operative 6th h of Groups III and V.

Conclusion:

The low OSI and TAS values may interpret as a low degree of oxidative damage. The OSI values at the post-operative 6 h of Groups I and II were lower than those of other groups. We accept this result as low oxidative damage.
Laparoscopic limited hemicolectomy for descending colo-colic intussusception in an adult
Authors: Akash Akash , Kumar Aditya , Gupta Nikhil
Published: September 2023

Intussusception in adults represents 1% of bowel obstructions and up to 0.02% of all hospital admissions. Amongst these, colo-colic intussusception of the descending colon forms the rarest of causes due to the fixed nature of the descending colon. Most of adult intussusceptions follow a lead point and are commonly due to colonic malignancy which may get missed on pre-operative evaluation. Surgery is usually warranted as these patients are usually symptomatic and at risk of vascular compromise, leading to perforations and obscure malignancies. We present a case of laparoscopic limited hemicolectomy and primary anastomosis in a middle-aged male who presented with colo-colic intussusception, which appeared to be following a malignant mass on imaging and lipoma on colonoscopic biopsy done twice. Keeping in mind the possibility of a malignant lead point, no attempt was made to reduce the intussusception and a vessel first approach with 5 cm margin on either side was performed.
A clinical study to evaluate the efficacy of Ayurvedic intervention in management of chronic bronchitis
Authors: Tomar Rinku , Yadav Babita , Singh Harbans , Hetalben Amin , Khanduri Shruti , Sharma Bhagwan Sahay , Rana Rakesh , Singhal Richa , Chandrasekhararao Bhogavalli , Srikanth Narayanam , Dhiman Kartar Singh
Published: September 2023

INTRODUCTION:

Talisadi Churna (TC) is an Ayurveda formulation indicated in managing Kaphaja Kasa. The symptoms of Kaphaja Kasa, narrated in the Ayurveda classical texts, resembles with chronic bronchitis (CB). This open-label, single-arm, prospective study was planned to evaluate the efficacy of TC in the management of CB.

MATERIALS AND METHODS:

Seventy-five patients who fulfilled the inclusion criteria for CB were enrolled at Central Ayurveda Research Institute for Respiratory Disorders, Patiala. They were treated by oral administration of TC 3 gm thrice a day for 12 weeks with a post-treatment follow-up after four weeks. The results were assessed by change in Leicester Cough Questionnaire (LCQ) Score, episodes of acute exacerbation, change in St. George’s Respiratory Questionnaire (SGRQ) Score for Quality-of-life, Functional/Exercise capacity [change in peak expiratory flow rate (PEFR) and FEV1%] and occurrence of adverse events.

RESULTS:

Sixty-eight participants completed the study. Significant results (P < 0.001) is found in wheezing, nausea, etc and in the cardinal symptoms such as breathlessness, cough, and expectoration. Statistically significant changes were found in LCQ, SGRQ, and PEFR parameters. No adverse events were reported during the study period.

CONCLUSION:

Talisadi Churna may be found effective in conditions such as Chronic Bronchitis. Based on the promising results of this study, randomized controlled trials with adequate sample size may be planned on Talisadi Churna in Chronic Bronchitis compared to standard care or as an add-on therapy with conventional medicine. Therefore TC can be further evaluated for incorporating it under the standard measure for management of CB.
Cross sectional study to assess the impact of COVID-19 infection on pulmonary function tests in children
Authors: Kumari Archana , Saxena Romit , Dabas Aashima , Kumar Deepak , Jhamb Urmila , Pallavi Pallavi
Published: September 2023

Context:

Pediatric data on long-term sequalae of Coronavirus disease 2019 (COVID-19) on pulmonary functions (PFT) are lacking from South east Asia.

Aim:

To assess the long-term effect of pediatric COVID-19 disease on PFT.

Study design:

Prospective cohort trial with follow-up of COVID-19 positive children with PFT at Department of Pediatrics, Lok Nayak Hospital, New Delhi, Delhi, India.

Methods:

Pulmonary function test was performed after an average duration of 8.3 ± 2 months (range 7–14) following COVID-19 in 20 children (age 7–18 years) with different disease severity. Findings were recorded and compared among the subgroups. A pre-structured proforma was used for clinical examination and scoring systems.

Statistical analysis:

Categorical data were presented as counts and percentage, and skewed distribution as median/interquartile ranges. Relevant tests of significance were applied for comparison between groups.

Results:

At baseline, fever (80%) and associated cough, headache, myalgia, and fatigue were the most common presenting clinical features (≥50% of cases). Concomitant gastrointestinal disturbances were identified in 10%–30% of cases. On follow-up, respiratory rate, SpO2, and single breath count along with chest auscultation were normal in all children. Mean saturation on follow-up was 98.5 ± 0.76. The PFT revealed that forced expiratory volume in 1s (FEV1), 0.5s (FEV0.5), FEV1/forced vital capacity, and peak expiratory flow rate remained normal (>80% predicted). This was comparable across subgroups (mild vs. moderate/severe and ground glass opacity, ground glass opacities [GGO] vs. non GGO group; P value ≥ 0.05).

Conclusions:

These observations suggest that children with mild/moderate infection may not develop long-term sequelae as evaluated in this study.
CRAB score for prediction of colectomy within 2 years following admission for acute severe ulcerative colitis
Authors: Devadas Krishnadas , Giri Suprabhat , Varghese Jijo , George Antony
Published: September 2023

Background:

The Oxford and Swedish indexes were developed to predict in-hospital colectomy in acute severe ulcerative colitis (ASUC), but not long-term prediction, and all these indexes were based on Western data. Our study aimed to analyze the predictors of colectomy within 3 years of ASUC in an Indian cohort and derive a simple predictive score.

Methods:

A prospective observational study was conducted in a tertiary health care center in South India over a period of 5 years. All patients admitted with ASUC were followed up for a period of 24 months after the index admission, to look for progression to colectomy.

Results:

A total of 81 (47 male) patients were included in the derivation cohort. Fifteen (18.5%) patients required colectomy during a follow-up period of 24 months. On regression analysis, C-reactive protein (CRP) and serum albumin were independent predictors of 24-month colectomy. The CRAB (CRP + AlBumin) score was obtained by multiplying coefficient of beta to albumin and CRP (CRAB score = CRP x 0.2 – Albumin x 0.26). The CRAB score demonstrated an AUROC of 0.923 and a score of >0.4 with a sensitivity of 82% and specificity of 92% for the prediction of 2-year colectomy following ASUC. The score was validated in a validation cohort of 31 patients, and at >0.4, the score had a sensitivity of 83% and a specificity of 96% in predicting colectomy.

Conclusion:

CRAB score is a simple prognostic score that can predict 2-year colectomy in ASUC patients with high sensitivity and specificity.
Study of Robot Manipulator Control via Remote Method
Authors: Tuan Nguyen
Published: September 2023

INTRODUCTION: The study introduces a novel approach to the design and management of industrial robots using virtual reality technology, enabling humans to observe a wide range of robot behaviors across various environments.OBJECTIVES: Through a simulation program, the robot's movements can be reviewed, and a program for real-world task execution can be generated. Furthermore, the research delves into the algorithm governing the interaction between the industrial robot and humans.METHODS: The robot utilized in this research project has been meticulously refurbished and enhanced from the previously old version robotic manipulator, which lacked an electrical cabinet derived.RESULTS: Following the mechanical and electrical upgrades, a virtual setup, incorporating a headset and two hand controllers, has been integrated into the robot's control system, enabling control via this device.CONCLUSION: This control algorithm leverages a shared control approach and artificial potential field methods to facilitate obstacle avoidance through repulsive and attractive forces. Ultimately, the study presents experimental results using the real robot model.
A Hybrid Fuzzy Factor Analysis Model for Evaluation of Fiscal Proficiency
Authors: Poonam  , Mangla Monika , Sharma Nonita , Yoosuf Mohamed Sirajudeen
Published: September 2023

Fiscal Proficiency is one of the most significant priority for mankind as it has a key role in the escalation of the lifestyle. Hence, it plays an important role in the growth of individual, family and finally leads to the growth of the national economy. Here in this manuscript, authors present a fuzzy factor analysis model to determine and evaluate the factors that influence the fiscal proficiency. The application of fuzzy concepts to the statistical analysis deemed appropriate while investigating a nondeterministic report. Resultantly, authors present a Mamdani-based fuzzy model to evaluate the fiscal proficiency through various factors. The proposed model is proved to be an effective model and hence can be widely implemented in real life. Further, authors also recommend that the regulatory authorities should take efforts to promote fiscal proficiency that will lead towards escalation of national economy.
Generalized effective completeness for continuous logic
Authors: Camrud Caleb
Published: September 2023

In this paper, we present a generalized effective completeness theorem for continuous logic. The primary result is that any continuous theory is satisfied in a structure which admits a presentation of the same Turing degree. It then follows that any decidable theory is satisfied by a computably presentable structure. This modifies and extends previous partial effective completeness theorems for continuous logic given by Calvert and Didehvar, Ghasemloo, and Pourmahdian.
The relationship of sinus opacification, olfaction and dupilumab efficacy in patients with CRSwNP
Authors: Lee S E , Amin N , Mannent L P , Bachert C , Gross G , Cho S H , Praestgaard A , Siddiqui S , Nash S , Kamat S , Khan A H , Jacob-Nara J A
Published: September 2023

Background: Loss of sense of smell is one of the most burdensome symptoms of chronic rhinosinusitis with nasal polyps (CRSwNP) but its relationship to sinus disease on imaging is unclear. Dupilumab improves sense of smell and radiographic severity of sinus disease in patients with CRSwNP. We investigated the relationship of sinus opacification severity and loci to olfactory impairment and dupilumab efficacy in patients with CRSwNP from the SINUS-24/SINUS-52 (NCT02912468/NCT02898454) studies. Methods: Sinus opacification was evaluated using the Lund-Mackay computed tomography (LMK-CT) score and sense of smell using patient-reported loss of smell (LoS) score, University of Pennsylvania Smell Identification Test (UPSIT) score and the 22-item Sino-Nasal Outcome Test (SNOT-22) smell/taste item. Results: At baseline, 95% of patients (688/724) had impaired sense of smell and opacification was extensive across all sinuses. Greater olfactory impairment was associated with greater opacification, especially in the ethmoid, sphenoid and frontal sinuses. At Week 24, reductions in LMK-CT total score and ethmoid and sphenoid sinus scores with dupilumab were weakly correlated with improvements in sense of smell assessed by LoS, UPSIT and SNOT-22 smell/taste item. More dupilumab than placebo pa- tients achieved clinically meaningful (≥5-point) improvement in LMK-CT total score at Week 24 and Week 52. Conclusion: Radiographic disease severity on imaging was associated with smell outcomes in this cohort. Opacification of the ethmoid, sphenoid and frontal sinuses was associated with severe smell loss. These data suggest that dupilumab effects on smell may be partly mediated through reduced sinus inflammation.
Meta-Analysis on the Association between Echo Intensity, Muscle Strength, and Physical Function in Older Individuals
Authors: Yuan Han , Kim Maengkyu
Published: September 2023

Background: The use of ultrasonographic echo intensity (EI) to evaluate skeletal muscle quality and its effects on strength, explosive power, and physical function (PF) in older individuals remains unclear. This meta-analysis evaluated the associations among EI, muscle strength (MS), and PF in older individuals.Methods: We conducted a systematic search of the PubMed, Embase, Web of Science, SPORT Discus, and CINAHL databases through October 2022 to identify primary studies examining the association between EI and MS/PF. Effect sizes were computed using a random-effects model and presented using forest plots. Pearson correlation coefficient (r) and I2 statistics were used to measure heterogeneity.Results: This meta-analysis included 24 patients. EI demonstrated a negative association with maximal strength (r=-0.351; 95% confidence interval [CI], -0.411 to -0.288; p<0.001) and explosive power (r=-0.342; 95% CI, -0.517 to -0.139; p=0.001) in older individuals. Handgrip strength also showed a significant negative correlation with EI (r=-0.361; 95% CI, -0.463 to -0.249; p<0.001). However, we observed only a small and non-significant negative association between EI and gait speed (r=-0.003; 95% CI, -0.083 to -0.077; p=0.943), and a weak non-significant correlation with the chair stand test (r=0.072; 95% CI, -0.045 to 0.187; p=0.227).Conclusion: Increased EI was associated with lower strength and power but not with gait speed or chair test performance in older individuals. Further large-sample studies with long-term follow-up are needed to improve frailty prediction and risk assessment in this population.
Association between Toe Pressure Strength in the Standing Position and Maximum Walking Speed in Older Adults
Authors: Kamasaki Taishiro , Otao Hiroshi , Hachiya Mizuki , Tanaka Shinichi , Ochishi Kohei , Shimokihara Suguru , Maruta Michio , Han Gwanghee , Akasaki Yoshihiko , Hidaka Yuma , Tabira Takayuki
Published: September 2023

Background: Considering concerns about conventional toe grip strength, we devised a method to measure toe pressure strength in the standing position, which is close to the actual motion. This study examined the association between toe pressure strength in the standing position and walking speed among older adults.Methods: This cross-sectional study included 150 community-dwelling older adults (81±8 years, 73% female) who participated in the physical fitness test. We analyzed the correlation between the participants’ maximum walking speed and physical function. Furthermore, we performed regression analysis with the maximum walking speed as the dependent variable to examine the association with toe pressure strength in the standing position. We also examined the association between maximum walking speed and toe pressure strength in the standing position by introducing a covariate.Results: Correlation analysis revealed a significant positive correlation between maximum walking speed and toe pressure strength in the standing position, with a moderate effect size (r=0.48, p<0.001). Moreover, multiple regression analysis with covariates showed an association between maximum walking speed and toe pressure strength in the standing position (standardization factor=0.13, p<0.026).Conclusion: Toe pressure strength in the standing position was associated with maximum walking speed. This finding clarifies the significance of assessing toe pressure strength in the standing position and suggests that enhanced toe pressure strength in the standing position may increase maximum walking speed.
A Health Survey Revealing Prevalence of Vector-Borne Diseases and Tuberculosis in Papua New Guinea Defence Force Personnel and Families
Authors: McCallum Fiona , Mond Krond , Cheng Qin , Furuya-Kanamori Luis , Auliff Alyson , Kaminiel Peter , _ _
Published: September 2023

The Papua New Guinean Defence Force (PNGDF) and the Australian Defence Force (ADF) work and train closely. Infectious diseases pose a health threat to both forces, but recent knowledge about the risk at military bases in Papua New Guinea is limited. To improve understanding, a collaborative cross-sectional survey was conducted (March–April 2019) at Lombrum Naval base (Manus province) and Moem Army barracks (Wewak, East Sepik province) plus its Vanimo outpost (Sandaun province). Clinical data, venous blood, and sputum were collected from PNGDF personnel (DF) from the three sites, with point-of-care testing conducted for malaria (microscopy and rapid diagnostic test [RDT]), lymphatic filariasis (RDT), glucose-6-phosphate-dehydrogenase (G6PD) deficiency (RDT), tuberculosis (GeneXpert), and hemoglobin level. Finger prick blood collected from family members residing at the Wewak base was tested for malaria and hemoglobin level. Overall, 235 DF and 793 family members completed the survey. Microscopy revealed malaria prevalence as 0.4% Plasmodium falciparum and 3.1% Plasmodium vivax among DF and 3.5% P. falciparum, 14.3% P. vivax, and 0.3% mixed P. falciparum/P. vivax among family members. Among DF, 3.9% were G6PD deficient and none tested positive for tuberculosis or for lymphatic filariasis antigen. Anemia was present in 6.5% of DF and 47.3% of family members, predominantly females. Results suggest ongoing exposure to malaria, particularly P. vivax, at study sites, whereas infections of lymphatic filariasis and tuberculosis were not detected. Survey results will inform the PNGDF and the ADF regarding vector-borne disease risk for future sustainable health and disease control interventions.
Screening for K13-Propeller Mutations Associated with Artemisinin Resistance in Plasmodium falciparum in Yambio County (Western Equatoria State, South Sudan)
Authors: Molina-de la Fuente Irene , Sagrado Benito María José , Ousley Janet , Gisbert Francisco de Bartolomé , García Luz , González Vicenta , Benito Agustín , Chol Buai Tut , Julla Ahmed , Bakri Abubakr , Nanclares Carolina , Berzosa Pedro
Published: September 2023

Artemisinin-combined treatments are the recommended first-line treatment of Plasmodium falciparum malaria, but they are being threatened by emerging artemisinin resistance. Mutations in pfk13 are the principal molecular marker for artemisinin resistance. This study characterizes the presence of mutations in pfk13 in P. falciparum in Western Equatoria State, South Sudan. We analyzed 468 samples from patients with symptomatic malaria and found 15 mutations (8 nonsynonymous and 7 synonymous). Each mutation appeared only once, and none were validated or candidate markers of artemisinin resistance. However, some mutations were in the same or following position of validated and candidate resistance markers, suggesting instability of the gene that could lead to resistance. The R561L nonsynonymous mutation was found in the same position as the R561H validated mutation. Moreover, the A578S mutation, which is widespread in Africa, was also reported in this study. We found a high diversity of other pfk13 mutations in low frequency. Therefore, routine molecular surveillance of resistance markers is highly recommended to promptly detect the emergence of resistance-related mutations and to limit their spread.
SNSF Datastory - Start-ups: what is the contribution of research funding?
Authors: Manuel Klaus
Published: September 2023

A study has shown: with their research funding, the SNSF and Innosuisse facilitate the founding of start-ups. Many business ideas originate at higher education institutions and other research centres. This benefits society as a whole.
PENGARUH ZAKAT DIGITAL TERHADAP PENGENTASAN KEMISKINAN DI ERA DIGITAL
Authors: Farid Diana , Abdulah Pakarti Muhammad Husni , Fathiah Iffah , Hendriana Hendriana
Published: September 2023

This study aims to investigate the effect of digital zakat on poverty alleviation in the digital era. In the context of growing digitalization, digital zakat becomes an attractive alternative in the collection and distribution of zakat to help those in need. The research method involves searching and analyzing published literature, including scholarly articles, research reports, and books related to digital zakat and poverty alleviation. The data collected will be analyzed qualitatively by identifying key themes that emerge in the relevant literature. These themes will be used to compile research findings that will provide in-depth insights into the influence of digital zakat in alleviating poverty in the digital era. The results of this study show that digital zakat has significant potential in alleviating poverty in the digital era. One of the main advantages of digital zakat is the ease of access and transparency in the collection and distribution of zakat. Through digital platforms, individuals can easily collect and transfer their zakat directly to needy recipients. This reduces the cost and time involved in the traditional process of zakat collection and distribution. In addition, digital zakat also enables a more inclusive approach in alleviating poverty, with more individuals able to participate in giving zakat. This research contributes to the understanding of the effect of digital zakat on poverty alleviation in the digital era. The findings and recommendations from this research can serve as a guideline for zakat institutions, government, and other related organizations in designing and implementing effective digital zakat. It is hoped that this research can encourage further development and wider application of digital zakat for poverty alleviation in the future.
STUDY OF THE STRESS-STRAIN STATE OF THE MATERIAL AT THE CRACK TIP, LOCATED IN THE AREA OF THE STRUCTURAL CONCENTRATOR
Authors:   Peter the Great St. Petersburg Polytechnic University, TULIN Daniil E.
Published: September 2023

The influence of the stress concentrator is studied due to the design features of the welded metal structure of a loader crane on the stress-strain state of the material in the fracture process zone. Within the framework of the research, a physical criterion using the basic mechanical properties of the material is applied. A normal tear-off crack is considered under uniaxial loading conditions. FEM analysis of T-joint and lap welded joint models, as creating the highest stress concentration in metal structures of loader cranes, is carried out. A comparative analysis of calculation results for models with a crack in the concentrator area and models with a crack in a smooth plate is performed. The influence of the concentrator and its several parameters on the stress stiffness at the crack tip is shown. A general averaged estimation of the concentrator influence on the material stress state in the fracture process zone is proposed. Recommendations on taking into account the presence of the concentrator in analytical calculations are given.
OPTIMIZATION OF CONCENTRATION OF ANTIOXIDANT ADDITIVE IN PLASTIC LUBRICANT BASED ON RAPESEED OIL
Authors:   V.A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus, GRIGORIEV Feodor A. , PODGORNAYA Viktoriya V. ,   V.A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus, MARCHANKA Larysa N. ,   Francisk Skorina Gomel State University, KAVALIOVA Inna N. ,   V.A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus
Published: September 2023

Plastic lubricant with rapeseed oil dispersion medium is considered with addition of diphenylamine antioxidant additive. Analysis of tribotechnical, chemical and physicо-mechanical characteristics of the obtained lubricants with content of antioxidant additive from 0.5 to 10.0 wt.% is carried out. The effect of the additive concentration and temperature of introduction on the functional characteristics of lubricants is shown. A comprehensive method is proposed for evaluating the optimal concentration and temperature of the antioxidant additive introduction using an integral indicator, according to the lubricant total functional characteristics. It is noted that for plastic lubricant with a rapeseed oil dispersion medium and a dispersion phase based on a complex calcium thickener, the optimal temperature range for introducing an antioxidant additive is 85–95 °C at the cooling stage, at a concentration of 1.0 wt.%. In this case, the best combination of the finished product functional characteristics is achieved. Based on the proposed methodology and taking into account the experimental data, using expert criteria it is possible to optimize the concentration and temperature of introduction of antioxidant additive diphenylamine, to obtain a plastic lubricant with given characteristics.
MECHANICAL AND MATHEMATICAL MODELS OF ONE TYPE OF BLOCK ELEMENTS FOR PROBLEMS OF UNDERGROUND GEOMECHANICS
Authors:   Belarusian State University, ZHURAVKOV Michael A. , NIKOLAITCHIK Mikhail A. ,   Belarusian State University, ZHANG Shiqi ,   Belarusian State University
Published: September 2023

The article presents a procedure for constructing mechanical and mathematical models to describe the stress-strain state of one type of block element, taking into account its own deformation. On the basis of this type of block element, it seems promising to build an implementation of the discrete element method for modeling the mechanical state of rock masses in areas of a clear violation of the continuity hypothesis. The introduced block element can be used both for issues under static loading and in the case of dynamic problems.
IMPACT OF THE COVID-19 PANDEMIC ON EMBRYO TRANSFER ACTIVITIES IN EUROPE
Authors: CIORNEI Stefan Gregore , DRUGOCIU Dan , NECHIFOR Florin , ROSCA Petru
Published: September 2023

This review highlights to what extent the embryo transfer (ET) activity in Europe was affected by the COVID-19 pandemic. The ET represents a procedure of modern reproductive biotechnologies that is increasingly applied in farms animals. Commercial ET is applied to cattle and, albeit to a lesser extent, to other species. For this study, official data reported by each country to the European (AETE) and international (IETS) forums, regarding ET activities, were accessed. Each country has an official rapporteur, but the procedures are not mandatory. The reported data included the total number of ET sessions, the type of embryos obtained in vivo derived (IVD) or in vitro produced (IVP), the collection rate of oocytes and embryos and transferable embryos produced both in cattle and other species. For comparison, the data of two similar pre-pandemic (2017 and 2018) and pandemic (2019 and 2020) periods were analysed. The pandemic period (2019) started with a record decrease in all categories of ET, most likely because of less reports by veterinaries since reporting took place in May 2020, already pandemic time Europe, indicating a false negative decrease in Europe, the total ET activities reported decreased by 31.59%. In 2019, the in vivo ET procedures in cattle decreased by 26,421 sessions compared to 2018 (approximately 20%). Surprisingly, during the pandemic, in vivo ET in equines increased by almost 40%.
First report of Pink Disease of Ficus benghalensis L. caused by Erythricium salmonicolor (Berk. & Broome) Burds. (Corticiaceae) from India.
Authors:   Department of Botany, Rajaram College, Kolhapur, Maharashtra, India. 416004, Patil Anjali Rajendra , Patil Yogesh Sadashiv ,   Department of Botany, Rajaram College, Kolhapur, Maharashtra, India. 416004, Vedpathak Mrunalini Ajitkumar ,   Department of Botany, Rajaram College, Kolhapur, Maharashtra, India. 416004
Published: September 2023

Erythricium salmonicolor (Berk. & Broome) Burds. causes a canker and die-back disease, commonly known as pink disease, on many tree species. During the field survey, typical symptoms of pink disease were observed on the dead branches of Ficus benghalensis L. trees. The pathogen isolated from host tree and identified as Erythricium salmonicolor (Berk. & Broome) Burds. was confirmed on the basis of macro-micro morphological analysis. To our knowledge, this is First report of Pink Disease of Ficus benghalensis L. caused by Erythricium salmonicolor (Berk. & Broome) Burds. from India.
Evaluating Tourism Digital Marketing Activities: Case Study of Moc Chau, Son La, Viet Nam
Authors:   University of Labour and Social Affairs, Van Anh Ph.D. Nguyen Thi , Anh Ho Hien ,   Hanoi Amsterdam Highschool for the Gifted
Published: September 2023

In the context of 4.0, Digital Marketing is becoming more and more important for all aspects of life, including tourism. This study aims to examine the tourist’s evaluation of the use of tourism digital marketing (digital marketing tools) by travel agencies in Moc Chau, Son La. The results show that “Social Media Marketing” has the maximum level of appearance, level of attraction and level of influence. In addition, “Video Marketing” and “Multimedia Marketing” also have a high frequency of appearance, level of attraction, and high level of influence. From studying the theoretical basis of Digital Marketing, with the survey results and in-depth interviews, the research team proposes to make some suggestions to improve the efficiency of using digital marketing tools for Moc Chau tourism and government agencies.
Identifying Energy Literacy Understanding of Physics Teacher Candidate Students Using a Four-Tier Test Instrument Based on Energy Literacy
Authors:   Program Studi Pendidikan Fisika, FKIP, Universitas Muhammadiyah Makassar, Indonesia, Fiskawarni Tri Hastiti , Rahmawati Rahmawati ,   Program Studi Pendidikan Fisika, FKIP, Universitas Muhammadiyah Makassar, Indonesia, Saad Rezkawati ,   Program Studi Pendidikan Fisika, FKIP, Universitas Muhammadiyah Makassar, Indonesia, Handayani Yusri ,   Program Studi Pendidikan Fisika, FKIP, Universitas Muhammadiyah Makassar, Indonesia
Published: September 2023

This research aims to identify the energy literacy abilities of prospective physics teacher students using a test instrument in the form of a four tier test. This type of research is quantitative descriptive research. The population of this study was one class of prospective physics teacher students at the first level, totalling 30 students. The data collection technique was carried out using a test technique using a test instrument in the form of a four-tier test with a total of 40 questions. The four-tier test has the advantage of being able to capture more accurate information with diverse answer patterns, which is one of the reasons for its use. The analysis technique in this research is descriptive statistical analysis. The level of understanding of students' energy literacy is categorized into three categories, namely understanding, not understanding, and misunderstanding. The energy literacy indicators measured in this research consist of six indicators which include: (1) basic energy knowledge; (2) understanding energy sources and their relationships; (3) awareness of the importance of energy use for individuals and social life; (4) knowing trends in energy use in Indonesia and global energy sources-supply and use; (5) understand the influence of the development of energy sources and the implementation of their use in society; and (6) understand the influence of the development of energy sources and their use on the environment. The research results show that the level of understanding of energy literacy among students is in the category of not understanding as much as 5.83% of students. Furthermore, the level of understanding of students' energy literacy in the understanding category was 31.38% of students. Meanwhile, there were 62.79% of students who had a level of understanding of energy literacy in the misunderstanding category.
A Model of Community Empowerment in Increasing Welfare in the Border Area through the District Program
Authors:   Universitas Tanjungpura, Pontianak Indonesia, Sikwan Agus
Published: September 2023

This study analyzes the Community Empowerment Model in improving the community's welfare in the border area through the district's regional program. Welfare conditions in border areas are quite apprehensive, especially about social welfare; it is necessary to accelerate the development of underdeveloped regions. This research method is included in descriptive research with a qualitative approach. This research tries to describe the Community Empowerment Model in improving the welfare of people in border areas through regional programs. The results of the study of the Community Empowerment Model in enhancing the interest of the community in the border area through the district regional program show that the district government's strategy in dealing with underdeveloped villages in the border area is only limited to designing local economic development such as development in the field of SMEs and infrastructure development, empowering village communities in its implementation developing independence and community welfare by utilizing resources through the establishment of Village development policies and programs. In addition, the provision of village facilities and infrastructure. Increasing the institutional capacity of the business world government, such as MSMEs and village cooperatives. The design that has been formed has yet to be implemented effectively by the government, so i t has not impacted increasing economic resilience in society.
SELECTION OF THE BEST B-SPLINE REGRESSION MODEL FOR ESTIMATING BITCOIN PRICE INCREASES BASED ON ORDER AND OPTIMAL KNOT POINT
Authors: Faridza Mohammad Dandi
Published: September 2023

The cryptographic virtual currency, bitcoin, is considered the main originator of cryptocurrencies that emerged due United States financial crisis in 2008. The idea was sparked by Nakamoto by introducing an alternative currency system that really refers to the strength of supply and demand. Based on INDODAX data, the bitcoin exchange rate during October 2020 to February 2021 is a condition of a large increase in a short time with a percentage increase of 450%. The increase in bitcoin prices can be modelled using the b-spline nonparametric regression method based on order and optimal knot points based on the smallest Generalized Cross Validation value. The resulting b-spline 4 degree and the number of knots points 5 as the best model with each bases described recursively.
ESTIMATED AVERAGE TIME TO HIRE EMPLOYEES OF THE COMPANY BASED ON KUMARASWAMY DISTRIBUTION
Authors: Usraini Laisa
Published: September 2023

Recruitment of employees in a company is a process starting from selecting and receiving prospective employees, in order to find workers who are able to work in a company. However, companies must know when recruitment will open. The purpose of this research is to find out how long the average opportunity time of recruitment is. The method used is the Kumaraswamy distribution with three parameters as benchmarks for the estimated recruitment time, in order to find out how long the chances of the recruitment lasting using a simplified survival function using the properties of the Laplace transform. Based on the estimation of the average time of recruitment, the results show that the greater the value of the parameters the less chance the average recruitment time is or the tighter the prospective employees are accepted.
Mean-Variance Investment Without Risk-Free Assets in PT Company Shares PT Ace Hardware (Aces.Jk), PT Mayora Indah (Myor.Jk), PT Bri (Bbri.Jk), PT Siloam Hospital (Silo.Jk), PT Eterindo Wahanatama (Etwa.Jk)
Authors: Raharjanti Amalia
Published: September 2023

Portfolio is a form of strategy that investors often apply in risky investment conditions. The essence of portfolio construction is to allocate funds to various investment options to minimize investment risk. Therefore, the aim of this discussion is to construct an investment portfolio of several shares using an average variable portfolio optimization model without risk-free assets. To obtain an optimal portfolio, a mean-variance investment optimization model without risk-free assets or what is called the Basic Markowitz model is used. This involves investors measuring the risk of an asset using its â€œvarianceâ€ and then comparing it to the asset's average. It is hoped that this discussion can help investors to obtain an optimal portfolio, especially from the five selected shares.Â
Determining The Optimal Portfolio Markowitz Model on Moving Stock Prices Using Brown Motion Geometry
Authors: Suhariman Fikrianto , Prabowo Agung , Wardayani Ari
Published: September 2023

Stock price movements that fluctuate and follow a stochastic process will make it difficult for investors to start investing. For that, we need a stochastic mathematical model. The Brownian geometry motion model is one of the stochastic models that can be used to display the condition of a stock's price movement. Investment is related to the rate of return (return) and the risk obtained. The higher the rate of return obtained, the higher the risk obtained. Therefore, a portfolio calculation is needed, one of which is using the Markowitz model. The Markowitz model can be used to determine the optimal portfolio. The purpose of this study is to model stock prices and form an optimal portfolio. The stock price data used are BBRI, TLKM, and ADRO for the period from 1 July 2021 to 31 August 2022. The results obtained from this study are that there are three portfolio preferences. If investors like high risk to get high returns, then the combined allocation of funds for BBRI, TLKM and ADRO shares is 10.51%, 42.05% and 47.44% respectively. If investors do not like high risk but still want to get a return that is balanced with risk, then the combination of fund allocation for shares of BBRI, TLKM and ADRO is 22.62%, 46.63% and 30.75%, respectively. If the investor chooses minimum risk, the combined allocation of BBRI, TLKM and ADRO shares is 34.73%, 51.21% and 14.06%, respectively.
Sport and exercise sciences students’ and teaching assistants’ perceptions of rubrics in tertiary education
Authors: Anderson Neil
Published: September 2023

Little is known about the use that sport and exercise sciences students of different levels of study at university make of grading rubrics. The aims of this study were to develop a greater understanding of the perceptions students and teaching assistants (TAs) have of grading rubrics when writing and grading laboratory reports, respectively. Results showed that students in the earlier stage of their academic careers had more positive perceptions of rubrics and that students in the later part of their academic careers wanted more specific information from rubrics. Despite having positive perceptions of the rubric, nearly a third of teaching assistants chose not to use the rubric to inform their grading. Grading rubrics were generally well received by students at each level of study and benefits of rubrics included planning and enabling students to understand what to include in a report. Grading rubrics should be presented to sport and exercise students to enhance the educational scaffolding within the learning environment.
Gender differences in academic buoyancy among first-year undergraduate university students
Authors: Aloka Peter
Published: September 2023

First-year students at universities continue to experience adjustment challenges which are an indication of low academic buoyancy. Academic buoyancy is a student’s ability to succeed amidst academic difficulties and setbacks in academic settings. This study examined the gender differences in academic buoyancy among first-year undergraduate students in one public university in western Kenya. Within the positivist research paradigm, the study adopted a cross-sectional survey research design. The sample size of the study comprised 213 first-year students, selected using a simple random sampling method. The Academic Buoyancy Scale was used to collect data. An independent samples t-test was used to test the hypothesis. The results indicate that there is a statistically significant difference in the academic buoyancy scores for males and females [t (211) = -5.178, p <.001], but the magnitude of the differences in the mean was moderate (eta squared=.113). Thus, the male first-year students registered comparatively higher academic buoyancy than their female counterparts. This implies that male students have better coping mechanisms for environmental stressors at the university as compared to their female counterparts. The study recommends that counselling staff at universities should develop gendered orientation programmes to enhance the academic buoyancy of female first-year students. Moreover, universities should develop more focused academic orientation and nurturing among all first-year students to uplift academic buoyancy in all the courses for which they are registered.