bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh kualitas pelayanan dan produk terhadap kepuasan konsumen di the rice table indonesian restaurant desamuda villas seminyak bali
Authors: Heryana I Putu Agus , Aprinica Ni Putu Isha , Wardana Miko Andi
Published: February 2023

Kepuasan konsumen menjadi hal penting terhadap kinerja hotel. Untuk itu dalam memperoleh kepuasan konsumen dapat dilihat dari jumlah penjualan produk dan kualitas dari suatu produk, serta tingkat kepuasan konsumen terhadap pelayanan. Kepuasan konsumen dipengaruhi oleh kualitas pelayanan dan kualitas produk yang dilakukan oleh karyawan baik waiter dan waitress dalam memberikan pelayanan kepada konsumen. Penelitian ini dilakukan di The Rice Table Indonesian Restaurant Desamuda Villas Seminyak Bali. Teknik yang digunakan dalam pengambilan sampel adalah proportionate stratified random sampling. Sampel yang digunakan adalah konsumen The Rice Table Indonesian Restaurant dengan jumlah sebenyak 50 responden. Metode penelitian yang digunakan adalah kuantitatif dengan IBM SPSS Statistics 24. Hasil dari penelitian ini menunjukkan bahwa: 1) Pengaruh kualitas pelayanan berpengaruh positif dan signifikan terhadap kepuasan konsumen. 2) Pengaruh kualitas produk berpengaruh positif dan signifikan terhadap kepuasan konsumen. Manfaat dari penelitian ini adalah untuk mengetahui kualitas pelayanan dan kualitas produk yang diberikan waiter atau waitress terhadap kepuasan konsumen.
 
Consumer satisfaction is important to hotel performance. For this reason, in obtaining consumer satisfaction, it can be seen from the number of product sales and the quality of a product, as well as the level of customer satisfaction with services. Consumer satisfaction is influenced by the quality of service and product quality carried out by employees both waiters and waitresses in providing services to consumers. This research was conducted at The Rice Table Indonesian Restaurant Desamuda Villas Seminyak Bali. The technique used in sampling is proportionate stratified random sampling. The sample used is the consumer of The Rice Table Indonesian Restaurant with a total of 50 respondents. The research method used is quantitative with IBM SPSS Statistics 24. The results of this study indicate that: 1) The effect of service quality has a positive and significant effect on customer satisfaction. 2) The effect of product quality has a positive and significant effect on consumer satisfaction. The benefit of this study is to determine the quality of service and product quality provided by the waiter or waitress on customer satisfaction.
Pengaruh pemahaman konsep standard operating procedure terhadap produktivitas kerja room service di melia bali hotel spa and resort
Authors: Sandinata I Wayan Raditya Wira , Purnantara I Made Hadi , Arnawa I Gst Made Suka
Published: February 2023

Penelitian ini bertujuan untuk mengetahui pengaruh Standard Operating Procedure (SOP) terhadap Produktivitas Room service di Melia Bali Hotel SPA and Resorts. Penelitian dilakukan di Melia Bali Hotel SPA and Resorts dengan mengambil responden adalah karyawan bagian Food and Beverages Service. Penelitian dilakukan dengan menyebar kuesioner kepada karyawan. Teknik analisis yang digunakan untuk menganalisis data, yaitu analisis regresi linier sederhana, uji T, dan uji koefesien determinasi. Analisis regresi linier sederhana dilakukan untuk mengetahui ada atau tidaknya pengaruh SOP terhadap produktivitas kerja. Metode penelitian yang digunakan adalah statistik deskriptif kuantitatif. Hasil dari penelitian menunjukkan bahwa SOP berpengaruh positif dan signifikan terhadap produktivitas Room Service. Dalam peningkatan produktivitas karyawan alangkah baiknya pihak manejemen hotel tetap memberikan sosialisasi atau mengingatkan kepada karyawannya untuk lebih menerapkan Standard Operating Procedure sesuai dengan tujuan pihak organisasi dan manajemen
 
This study aims to determine the effect of Standard Operating Procedure (SOP) on Productivity Room service at Melia Bali Hotel SPA and Resorts. The research was conducted at Melia Bali Hotel SPA and Resorts by taking respondents who were employees of the Food and Beverages Service. The research was conducted by distributing questionnaires to employees. The analytical technique used to analyze the data, namely simple linear regression analysis, T test, and coefficient of determination test. Simple linear regression analysis was conducted to determine whether or not the influence of SOP on work productivity. The research method used is quantitative descriptive statistics. The results of the study indicate that SOP has a positive and significant effect on the productivity of Room Service. In increasing employee productivity, it would be better if the hotel management continued to provide socialization or remind employees to better implement Standard Operating Procedures in accordance with the goals of the organization and management.
Pengaruh brand image dan promosi traveloka terhadap minat beli kamar hotel di kabupaten badung
Authors: Sia Irena Eldryanti Ating , Yani Ni Wayan Mega Sari Apri , Susanti Luh Eka
Published: February 2023

Kehadiran Online Travel Agent (OTA) memudahkan konsumen untuk mencari, membandingkan harga sampai akhirnya melakukan pemesanan kamar sebelum melakukan perjalanan wisata. Salah satu website yang berperan penting dalam industri pariwisata adalah Traveloka. Penelitian ini bertujuan untuk mengetahi pengaruh brand image dan promosi terhadap minat beli kamar hotel di Kabupaten Badung. Jenis sampling yang digunakan adalah non-probability sampling dengan teknik purposive sampling dengan jumlah sampel penelitian sebanyak 100 respoden. Teknik analisis menggunakan uji validitas, uji reabilitas, uji asumsi klasik, analisis regresi linear berganda, pengujian hipotesis melalui uji F dan uji T, serta analisis koefisien determinasi. Brand image dan promosi Traveloka berpengaruh positif dan signifikan terhadap minat beli kamar hotel di Kabupaten Badung dengan hasil F hitung secara simultan adalah sebesar 91,892 > F tabel = 3,09. Brand image berpengaruh positif dan signifikan terhadap minat beli kamar hotel di Kabupaten Badung dengan nilai t hitung sebesar 2,565 > t tabel = 1,661. Promosi Traveloka berpengaruh positif dan signifikan terhadap minat beli kamar hotel di Kabupaten Badung dengan diperoleh nilai t hitung sebesar 6,728 > t tabel = 1,661.
 
compare prices and finally make a room reservation before traveling. One website that plays an important role in the tourism industry is Traveloka. This study aims to determine the effect of brand image and promotion on the purchase intention of hotel rooms in Badung Regency. The type of sampling used is non-probability sampling with purposive sampling technique with a total sample of 100 respondents. The analysis technique uses validity test, reliability test, classical assumption test, multiple linear regression analysis, hypothesis testing through F test and T test, and coefficient of determination analysis. Traveloka's brand image and promotions have a positive and significant effect on buying interest in hotel rooms in Badung Regency with the results of the calculated F simultaneously being 91.892 > F table = 3.09. Brand image has a positive and significant effect on buying interest in hotel rooms in Badung Regency with a t-count value of 2.565 > t table = 1.661. Traveloka promotions have a positive and significant effect on buying interest in hotel rooms in Badung Regency with the obtained t value of 6.728 > t table = 1.661.
Pengaruh gaya kepemimpinan transformasional dan kepuasan kerja terhadap turnover intention karyawan di golden tulip jineng resort bali
Authors: Prabawa Made Bagus Setya , Wiyasha Ida Bagus Made , Muliadiasa I Ketut
Published: February 2023

Turnover intention merupakan suatu pemikiran yang dimiliki oleh setiap karyawan untuk berhenti bekerja. Pada Golden Tulip Jineng Resort Bali terdapat permasalahan yaitu tingginya tingkat turnover karyawan. Tujuan penelitian ini adalah untuk mengetahui pengaruh gaya kepemimpinan transformasional dan kepuasan kerja secara parsial turnover intention. Populasi yang digunakan dalam penelitian ini adalah seluruh karyawan non manajerial Golden Tulip Resort Bali sebanyak 64 orang karyawan dengan menggunakan teknik non probability sampling menggunakan sampel jenuh. Pengumpulan data dilakukan dengan metode observasi, wawancara, dan kuisioner. Teknik analisis yang digunakan yaitu menggunakan uji asumsi klasik, analisis regresi linier berganda, koefisien determinasi, uji t, dan uji F. Hasil analisis menunjukan bahwa gaya kepemimpinan transformasional berpengaruh negative dan signifikan terhadap turnover intention karyawan dengan koefisiesn regresi sebesar - 0,233. Kepuasan kerja berpengaruh negatif dan signifikan terhadap turnover intention karyawan dengan koefisiesn regresi sebesar -0,348. Secara stimultan gaya kepemimpinan transformasional dan kepuasan kerja berpengaruh signifikan terhadap turnover intention karyawan. Manajemen Golden Tulip Jineng Resort Bali perlu meningkatkan kenyamanan karyawan dalam bekerja dan kepada pemimpin untuk lebih memperhatikan karyawan sehingga karyawan tidak memiliki keinginan untuk pergi meninggalkan perusahaan.
 
Turnover intention is a thought possessed by every employee to stop working. The purpose of this study is to determinate the effect of transformational leadership style partially and job satisfaction partialy and simultaneously on turnover intention. The population used in this study were all non- managerial employees of Golden Tulip Jineng Resort Bali, totaling to 64 employees by using non probability sampling and saturate sample.. Data collection is done through observation, interviews, and questionnaires. The analysis technique used is the classical assumption test, multiple linear regression analysis, coefficient of determination analysis, t-test, and f test. The result of analysis shows that transformational leadership style has a negative and significant effect on turnover intention with regression coefficient of -0,233. Job satisfaction has a negative and significant effect on turnover intention with regression coefficient of -0,348. While simultaneously transformational leadership style and job satisfaction significantly influence turnover intention. Golden Tulip Jineng Resort Bali management need to improve employees comfort at work and for the leaders to pay more attention to employees so the employees don’t have the desire to leave the company.
Implementing a web service for cartographic monitoring of the geological exploration field stage using open-source software
Authors: Loginov D.S.
Published: February 2023

The author presents the results of a web service development aimed at implementing a conceptual model of field geophysical surveys mapping monitoring. The issues of adapting the open source software DBMS PostgreSQL and JavaScript library Leaflet for centralized data gathering, systematization, updating and cartographic visualization of the geological exploration’s field phase progress are considered. The web service was tested during the seismic acquisition at the license areas in the Russian Federation and the Republic of India. It was used as the main tool for spatial analysis of the field crews’ productivity and considering natural and anthropogenic objects that prevent the timely execution of planned volumes of topographic and geodetic and seismic surveys, as well as a means of communication between specialists and administrative decision making. The results of the approbation showed an increase in the efficiency of geological exploration works’ field phase cartographic support. The experience of using open source software, a systematic approach to forming the server space and storing information in the database presented in the article enables developing web-mapping of exploration work carried out simultaneously in several territories through different methods of geophysical exploration.
Insignificant parameters in inverse photogrammetry tasks
Authors: Voronin E.G.
Published: February 2023

The third article in this series of publications deals with solving inverse problems of photometry. The matter of reducing the dimension of the original inverse task with excluding insignificant parameters from the equation is considered. The main known ways of identifying those ones having the greatest and least influence over the main characteristics of the equalization results are noted. Their disadvantages are indicated at solving poorly conditioned issues and problems with initial measurements, the actual accuracy of which is unknown. The characteristics of the results include indicators of precision and statistical quality of the equalization. The main indicators its exactness are the average square deviations of the indirect measurements’ residuals, primarily the coordinates of the reference and connecting points. Those of the statistical quality are estimates of the direct and indirect measurements statistical quality equalization, as well as evaluating the mean square error of the weight unit after that. An algorithm was developed to refine the initial weights of direct measurements, identify and first eliminate insignificant parameters based on the analysis of intermediate data of the task being solved. An addition to the algorithm for adjusting the weights of direct measurements during equalization was formulated; it provides identification and secondary screening of insignificant parameters. Experimental approbation of the identified ways is carried out. The necessity of adjusting the weights of indirect measurements was established.
A Novel Shape Descriptor for Object Recognition
Authors: ÇAKI Elif Ebru , GÖKÇE Celal Onur
Published: February 2023

In this study a novel shape descriptor for object recognition is proposed. As a preprocessing stage, Canny edge detection [4] is applied to input images. Output of Canny edge detector, namely edge image, is sampled and various number of points are selected. Chosen points are input to the new shape descriptor. Proposed shape descriptor is composed of deviations from average range and average angle. Shape descriptor is used as a feature extractor output of which is fed to linear classifier. Linear classifier is trained using pseudo-inverse and gradient descent techniques. Full MNIST dataset is used to test the system and results are reported.
CFD SIMULATION FOR AIRSPEED AND TURBULENCE VALIDATION IN MAIN DUCTING OF OFFICE BUILDING
Authors: Pradana Sabilly Handi , Khaerudini Deni Shidqi
Published: February 2023

This paper focuses on the calculation of sizing ducting based on cooling load requirements the main ducting of office building following regulation airspeed requirements using American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) and Computational Fluid Dynamics (CFD) simulations. The purpose of this research is to validate the airspeed and turbulence that occurs in the main ducting between manual calculations and CFD simulations. From the calculation, the cooling load requirement is 58.22 kW, for the cooling process an air flowrate of 7117 L/s is needed which is designed to pass through the main ducting in rectangular shape. The main ducting size uses 1200 mm x 500 mm at a speed of 12.7 m/s according to ASHRAE. Autodesk Inventor software is used for ducting modeling and Autodesk CFD is used for airflow simulation. CFD simulations are performed by applying boundary conditions and input parameters. The results showed that the velocity of the ducting design was suitable at 12.7 m/s with laminar flow. The ducting geometry must be designed aerodynamically to reduce the pressure drop which can cause the speed to increase so that it is outside the required limits. Thus, the CFD simulation results have verified the validity of manual calculations.
EVALUATION ENERGY SAVINGS AT MALUKU PROVINCE OFFICE BUILDING IN JAKARTA
Authors: Syauta Tommy Martin , Khaerudini Deni Shidqi
Published: February 2023

The electricity is very important to support activities in office building .The equipment like AC ( Air conditioning ) needs more electricity to be operated. The is almost 60%  is use to support this system (AC). This percentage describe that air condition system is an equipment that needs more electricity in the office and its become inefficiency in using electricity. To take overcome for this problem we need to efficiency in using energy. One of the method that now used to efficient that energy is called “ energy conversation” This method is using to saving the energy There is one thing that must be done in this activity which is “ energy audit “. Audit energy is one of method calculate IKE (  Intension Consumption  Energy) at on the building.The first preliminary audit shown that more energy, which 60% is use to operated the air conditioning (AC) system and 30% to operate lighting system. IKE for the lighting system is still below from maximum standard  which is 15 watt/m²The opportunity of saving energy on audit energy in AC system is done by cleaning up consist of : cleaning up filter, propeller corner fin of the evaporator, and the grill of in door unit.
Service Quality And Brand Awareness Intervention In Affecting Customer Satisfaction At The Bri Bank Pomalaa Unit
Authors: Titing Andry Stepahnie , Sudarnice Sudarnice , Wonua Almansyah Rundu
Published: February 2023

This study aims to determine the effect of service quality and Brand Awareness  toward customer satisfaction of Bank BRI Unit Pomalaa. The type of research used is Explanatory Research with a quantitative approach. The population in this study are the customers of Bank BRI Unit Pomalaa. The data collected using a questionnaire with samples taken as many as 74 respondent. In analyzing the data in this study using SmartPLS. The result of the partial analysis showed that service quality and Brand Awareness  has a positive and significant influence on customer satisfaction. Variables of service quality and Brand Awareness  has a positive and significant on customer satisfaction of 82,1%
The Effect of Covid 19 on Bitung Micro Business Performance
Authors: Layman Chrisanty Victoria
Published: February 2023

Microbusinesses under Dinas Koperasi Usaha Kecil Menengah Bitung faced plenty of struggles to make ends meet given the uncertainty of the Covid19 pandemic. The micro-business owners have to adapt and adjust their businesses for survivability.Objectives: This study aims to analyze the effect of Covid19 and market competition on these micro and small enterprises in Bitung, Indonesia which survived and still has business performance, either financial or non-financial. In addition, this study seeks to analyze the effect of Covid19 on the adoption of digital marketing that might influence business performance.Methodology: The study uses data from 38 micro-business in Bitung that are currently active and has been surviving through the Covid19 pandemic. Data analysis and hypothesis testing are done using Partial Least Squared Modelling (PLS-SEM) using SMART PLS.Finding: Results of this study shows that competition intensity has a positive influence on the adoption of digital marketing. In addition, digital marketing adoption positively influences both financial and non-financial performances.Conclusion: Contrary to common belief, it is competition intensity rather than the perception of Covid19 that has contributed to the adoption of digital marketing which in turn contributed to the business financial performance of micro businesses in Bitung.
Impact of Work-School Conflict to Employee Performance: Moderation of Perception Organizational Support and Work Characteristics
Authors: Nurhayati Mafizatun , Saputra Asep Rokhyadi Permana , Santosa Awan , Rahmani Shinta , Ariyanto Eny
Published: February 2023

Objectives: This study aims to analyze the role of perceived organizational support and job characteristics in the effect of work-school conflict on employee performance.Methodology: The population of this study is employees who work in several agencies in Jakarta, who are also master’s degree students in private universities which are excellence accredited, located in region of Jakarta, with a total sample of 275 respondents. The data analysis was conducted through Partial Least Square-Structural Equation Model (PLS-SEM).Finding: The results showed that work-school conflict has a negative effect on employee performance. Perceived organizational support has a positive effect on employee performance. This study found that organizational support was not able to weaken the effect of work-school conflict on employee performance in employees who were also students. Job characteristics have a positive effect on employee performance.Conclusion: The condition of a person playing multiple roles can cause stress, busy activities, and disturbances that have an impact on sub-optimal performance. Employees believe that the organization cares for and supports them, which is shown fairly in the decisions taken, the existence of good rewards, good working conditions, and support from superiors that will improve employee performance. Variation in skills, task identity, task autonomy, and feedback can affect employee performance, because the greater the diversity of work activities carried out, the more meaningful a person will feel. If a worker who is also a student is not able to manage the role conflict between work and school, the job characteristics will not be able to reduce the conflict, and it will impact to the decrease of employee performance.
Empirical Causality of Employee Work Productivity
Authors: Ni Bulan Tapi Rondang , Junita Audia , Fadillah Ridayati
Published: February 2023

Objectives: This study aims to determine the relationship between superior-subordinate communication on work productivity with work enthusiasm and positive work attitudes as mediating variables at the Department of Transportation of North Sumatra Province. Methodology: This research uses associative research type with quantitative paradigm. The population and sample used in this study, namely all employees/staff at the Department of Transportation of North Sumatra Province, totaling 118 staff. The saturated sampling technique is used to determine the research sample. Path analysis research design is used as an analytical tool to determine the direct or indirect relationship, between independent and dependent variables. Descriptive statistics are also used to discuss the research findings in greater depth. Primary data were processed using IBM SPSS 23 software.Finding: The superior-subordinate communication has a positive significant impact on work productivity either directly or indirectly through work enthusiasm and positive work attitudes. The results justify the significant contribution of superior-subordinate to work enthusiasm.Conclusion: The results of research related to superior-subordinate communication relations, work enthusiasm, and positive work attitudes towards work productivity in general have shown good conditions. However, in particular, there needs to be a better improvement regarding the communication relations between superiors and subordinates, work enthusiasm, and positive work attitudes of employees to increase the work productivity of employees at the Department of Transportation of North Sumatra Province.
Conceptual Understanding of Critical Factors That Drive Technopreneur Success in West Java
Authors: Cahyani Leni , Marcelino Dandy
Published: February 2023

Objectives: Technology-based entrepreneurship is required in the globalization age. To accomplish this achievement, researchers must understand what factors might impact it. The purpose of this research is to identify what factors can drive the success of digital entrepreneurs (technopreneurs) in West Java. Methodology: This study use explanatory statistics, with Structural Equation Model analysis technique through SMART PLS 2.0. Sampling technique chosen was accidental sampling with 400 respondents. Finding: Partially and simultaneously, all factors have a positive and significant effect on business success. Therefore they have identified the following factor variables: entrepreneurial behavior, skills, educational background, and service quality. Conclusion: Technopreneurs in West Java are encouraged to continue to improve all factor variables as a capital for success. Considering that this research is only conducted on digital entrepreneurs in West Java, other researchers who want to conduct research with similar variables are advised to choose different objects with a wider scope for comparison.
Analysis of Intervening Variables of New Product Performance affected by Tacit Knowledge and Strategic Flexibility
Authors: Hamdani Nizar Alam , Ridwan Muhammad , Maulani Galih Abdul Fatah , Permana Intan
Published: February 2023

Objectives: Global Innovation Index revealed that the innovation performance of Indonesia is relatively poor compared to several ASEAN countries. The lowest indicator of innovation performance is related to business sophistication. In business activities, some experts identify innovation as the key factor in company competitiveness. The author plans to analyze product innovation, innovation processes, and organizational innovations as intervening variables.Methodology: This study is causal research with a 95%  confidence interval in collecting and constructing data structures to evaluate the cause-and-effect relationship of the variables. The primary data was obtained through a survey of 90 small-scale leather apparel companies in Indonesia. Subsequently, the data was analyzed using a structural equation model and multiple.Finding: Compared to the previous studies, the results of this study indicated a novelty, product innovation, and process innovation can be intervening variables if there is strategic flexibility as exogenous variables and new product performance. To improve new product performance, every leather apparel industry in Indonesia must first increase tacit knowledge, strategic flexibility, product innovation, and process innovation.Conclusion: Based on the findings, the researcher suggests further research to examine the path analysis research framework are exogenous variables (strategic flexibility and tacit knowledge), endogenous variables (organizational innovation and new product performance), and intervening variables (product innovation and process innovation).
MSMEs and Fintech: A Comparison of Theory of Trying and Theory of Planned Behavior
Authors: Widokarti Joko Rizkie , Patiro Shine Pintor Siolemba , Tantri Sakina Nusarifa , Budiyanti Hety
Published: February 2023

Objectives: This study aims at examining the factors that trigger the intention of MSMEs owners to use fintech. The theories used in this study are Theory of Planned Behavior (TPB) and Theory of Trying (TT). This study compares the abilities of TT and TPB in predicting MSMEs and investors’ intentions in Indonesia when they use fintech services.Methodology: The population in this study are MSME owners spread across Jakarta, Jogjakarta, Semarang, and Surabaya. The sample size in this study was 427 respondents. To collect the data, this study used a purposive sampling technique and a quantitative method through questionnaires. Structural Equation Modeling (SEM) with a two-stage approach is used to analyze the data.Finding: The results of this study shows that TT fits better than TPB to explain the MSME’s owners’ intentions and behavior in using fintech services.Conclusion: The conclusion of this study showed that attitudes, subjective norms, and perceived behavioral control are significant predictors of intention based on TPB. Furthermore, the results of this study support that social norms, frequency, and attitudes are significant predictors of intention in TT.
Successful treatment of radiation-induced vaginal soft tissue radionecrosis with HBO2
Authors:   Division of Hyperbaric Medicine & Wound Care, Department of Emergency Medicine, SUNY Upstate Medical University, Syracuse, New York US, McGlynn John , Heyboer Marvin ,   Division of Hyperbaric Medicine & Wound Care, Department of Emergency Medicine, SUNY Upstate Medical University, Syracuse, New York US
Published: February 2023

Introduction: Radiation therapy to the pelvis can result in radiation-induced vaginal soft tissue necrosis. This significantly impacts quality of life. Studies evaluating the efficacy of HBO2 are limited. Methods: In this retrospective report, we reviewed the medical records of patients treated with once-daily HBO2 for radiation-induced vaginal soft tissue necrosis. We included females between the ages of 18 to 90 with history of pelvic cancer treated with radiotherapy and resultant soft tissue radionecrosis. Data collected included age, comorbid disease, cancer type, radiation dose, HBO2 treatment pressure, time, and total treatments. Primary outcome was improvement of radionecrosis; secondary outcomes were improvement of pelvic pain, reduction in need for analgesia, and improvement of vaginal bleeding. Results: Seven patients were identified, of which six received HBO2. One patient had a vaginal fistula. Four patients had documented improvement of radionecrosis. Four out of five patients with pelvic pain had resolution of their pain, with two patients no longer requiring opioid analgesia. Two patients who presented with vaginal bleeding showed improvement with one resolved and one significantly decreased requiring no further hospitalization or transfusion. One patient experienced no documented improvement in any of the measured outcomes. Conclusion: In this case series, five out of six (83%) patients treated with HBO2 for radiation-induced vaginal necrosis improved in at least one outcome measure. While the sample size is small, these results add to the data available that supports the use of HBO2 in suitable candidates without contraindications who have symptoms related to radiation-induced vaginal soft tissue necrosis.
Effects of hyperbaric oxygen therapy on periodontal disease: a literature review
Authors:   Department of Pediatric Otolaryngology, Head and Neck Surgery, Chairs of Pediatric Surgery, The Independent Public Clinical Hospital No. 6 of the Medical University of Silesia in Katowice John Paul II Upper Silesian Child Health Centre, Katowice, Poland, Latusek Katarzyna , Słotwińska Adrianna ,   Department of Pediatric Otolaryngology, Head and Neck Surgery, Chairs of Pediatric Surgery, The Independent Public Clinical Hospital No. 6 of the Medical University of Silesia in Katowice John Paul II Upper Silesian Child Health Centre, Katowice, Poland, Michniak Anna ,   Dental office for Periodontal and Mucosa Diseases Dental Clinic Zbigniew Zak, Cracow, Poland, Orzechowska-Wylęgała Boguslawa ,   Department of Pediatric Otolaryngology, Head and Neck Surgery, Chairs of Pediatric Surgery, The Independent Public Clinical Hospital No. 6 of the Medical University of Silesia in Katowice John Paul II Upper Silesian Child Health Centre, Katowice, Poland
Published: February 2023

Background and objective: Hyperbaric oxygen (HBO2) has been the subject of research in many areas of dentistry. HBO2 seems to be a useable, additional treatment method. However, there are still no certain conclusions and clear guidelines for procedures. The aim of the study was to collect current literature assessing the use of hyperbaric oxygen therapy in the treatment of periodontitis. Materials and Methods: The following review was performed using medical databases Medline via PubMed and Google Scholar. The review presents articles which assess the effect of hyperbaric oxygen therapy in combination with non-surgical scaling and root planing (SRP) in patients with periodontitis as an adjunctive method to standard protocols. Results: There are potentially plausible mechanisms by which HBO2 could be beneficial. Further welldesigned science research and clinical trials are needed. Due to a small body of literature, differences in methodology and observation periods the data are not sufficient for statistical analysis. Conclusion: The use of HBO2 seems to be reasonable as an adjunct method of the periodontitis treatment. However, authors of this literature review could not unambiguously state that hyperbaric oxygen therapy could be commonly recommended as a potential method of periodontitis treatment. It is essential to develop consistent protocols for the procedure and further research in this area.  DOI: 10.22462/01.01.2023.17
A fully automated algorithm for heart rate detection in post-dive precordial Doppler ultrasound
Authors:   Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill & North Carolina State University, US, Hoang Andrew , Le David Q. ,   Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill & North Carolina State University, US, Blogg S. Lesley ,   Department of Emergency Medicine, University of California, San Diego, California, US,   SLB Consulting, Newbiggin-on-Lune, Cumbria, UK, Azarang Arian ,   Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill & North Carolina State University, US, Dayton Paul A. ,   Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill & North Carolina State University, US, Lindholm Peter ,   Department of Emergency Medicine, University of California, San Diego, California, US, Papadopoulou Virginie ,   Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill & North Carolina State University, US
Published: February 2023

Background: Doppler ultrasound is used currently in decompression research for the evaluation of venous gas emboli (VGE). Estimation of heart rate from post-dive Doppler ultrasound recordings can provide a tool for the evaluation of physiological changes from decompression stress, as well as aid in the development of automated VGE detection algorithms that relate VGE presence to cardiac activity. Method: An algorithm based on short-term autocorrelation was developed in MATLAB to estimate the heart rate in post-dive precordial Doppler ultrasound. The algorithm was evaluated on 21 previously acquired and labeled precordial recordings spanning Kisman-Masurel (KM) codes of 111–444 (KM I–IV) with manually derived instantaneous heart rates. Results: A window size of at least two seconds was necessary for robust and accurate instantaneous heart rate estimation with a mean error of 1.56 ± 7.10 bpm. Larger window sizes improved the algorithm performance, at the cost of beat-to-beat heart rate estimates. We also found that our algorithm provides good results for low KM grade Doppler recordings with and without flexion, and high KM grades without flexion. High KM grades observed after movement produced the greatest mean absolute error of 6.12 ± 8.40 bpm. Conclusion: We have developed a fully automated algorithm for the estimation of heart rate in post-dive precordial Doppler ultrasound recordings.
Modelling and estimating volatilities in exchange rate return and the response of exchange rates to oil shock
Authors: Umoru David , Effiong Solomon Edem , Ugbaka Malachy Ashywel , Akhor Sadiq Oshoke , Iyaji Danjuma , Ofie Francis Ejime , Ihuoma Chineleobi Chris , Okla Emmanuel Steelman , Obomeghie Muhammed Adamu
Published: February 2023

Developing countries have persistently witnessed volatile exchange. Such volatility triggered instability in their exchange rates which induced colossal fluctuations in currency rates leading to uncertainty for both the consumers and firms. All these have instigated changes in official exchange rates that are harmful to underlie trade patterns in these countries. This study estimated fluctuations in daily exchange rate returns of ten African countries using generalized autoregressive conditional heteroskedasticity (GARCH) models, having ascertained the significance of autoregressive conditional heteroskedasticity (ARCH) effects. Structural vector autoregression (SVAR) estimator was utilized. Results showed Kenya shilling is the most relatively stable currency, whereas the Malawian kwacha is the most volatile among the currencies. There had been a series of random spikes in the exchange rate of Ghanaian cedi. Ghana and Kenya exchange rates are best projected using EGARCH, whereas SGARCH may be more efficient in estimating the volatility of Morocco and Zambia exchange rates. Leverage effects indicated a considerable magnitude of the adverse impact of bad news in the foreign exchange (FX) markets of Ghana and Zambia. Volatility shocks are expected to last in the future in those countries.
The role of Multidisciplinary Team and stepwise pelvic devascularisation to minimise blood loss during total pelvic exenteration for patients refusing blood transfusion
Authors: LeThanh Valentina , Bell Richard , Symons Nicholas , maid Hooman Soleymani
Published: February 2023

We describe the case of a Jehovah’s witness patient undergoing pelvic
exenteration for recurrent endometrial carcinoma, focusing on the
preoperative, intraoperative and postoperative measures that allowed
uncomplicated surgeries. Our case shows that pelvic exenteration is
feasible in patients refusing blood products, if performed with a
multidisciplinary team and careful planning.
A Large Intracardiac Hydatid Cyst with Concomitant Cervical and Hepatic Involvement: A Case Report
Authors: Faramarzpour Maryam , Jafari Sirous , Rahmanian Mehrzad , Sardari Akram , Larti Farnoosh
Published: February 2023

Cardiac hydatidosis is a relatively rare complication of echinococcosis,
with a potentially life-threatening condition. Here, we reported a large
interventricular septal hydatid cyst with bulging in the left ventricle
accompanied by a huge cervical lamp with recurrent hepatic cysts that
underwent cardiac surgery to excise the cyst uneventfully.
Isolated JUP Plakoglobin Gene Mutation with Left Ventricular Fibrosis in Familial Arrhythmogenic Right Ventricular Cardiomyopathy
Authors: Sood Michael R. , Zinkovsky Daniel
Published: February 2023

Introduction: Arrhythmogenic Right Ventricular Cardiomyopathy
(ARVC) is a rare inherited disorder usually affecting the right
ventricle (RV), characterized by fibro-fatty tissue replacement of the
healthy ventricular myocardium. It often predisposes young patients to
ventricular tachycardia, heart failure, and / or sudden cardiac death.
However, recent studies have suggested predominantly left
ventricle (LV) involvement with variable and / or atypical
manifestations. Cardiac Magnetic Resonance (CMR) imaging has emerged as
the non-invasive gold standard for the diagnosis of ARVC. Case
summary: A 21-year-old athletic male with a family history of unknown
ventricular arrhythmias, presented with near syncope, chest pain and
exertional palpitations. He had an initial work-up that was grossly
unremarkable including, electrocardiography (ECG), echocardiography and
CMR imaging. Six months later, he presented again with recurrent
symptoms during exercise and his ECG demonstrating a new epsilon wave.
He had markedly elevated cardiac biomarkers, (troponin I
>100 ng/dl, normal value < 0.04 ng/dl). A
subsequent coronary angiogram was performed, which was normal. Holter
monitoring further showed subsequent episodes of ventricular tachycardia
with a right bundle branch morphology. An endomyocardial biopsy was
performed, which was negative. A follow-up CMR demonstrated the
new development and prominent left ventricular epicardial scar
in the lateral wall. The patient underwent familial genetic testing,
which confirmed the presence of an isolated JUP gene mutation and showed
multiple genes consistent with ARVC in his mother. Thus, he manifested a
partial transmission of only one abnormal gene for ARVC and exhibited a
markedly different expression in his disease without evidence of typical
right-sided heart pathology. A third CMR study was performed, which
showed partial improvement in myocardial fibrosis after exercise
cessation. Conclusion: We present a case of a young male with a
newly diagnosed isolated JUP gene mutation and a genetically diagnosed
family history of ARVC. During his course, he demonstrated the
progression of a characteristic epsilon wave on ECG and the presence of
new, atypical, left ventricular fibrosis on repeat CMR imaging.
This case demonstrates a complex interplay between variable genetic
penetrance, phenotypical heterogeneity, and lifestyle factors including
exercise, in his disease expression and provides insight on the natural
course of an isolated JUP mutation. Although rare, clinicians should
have a high threshold for the suspicion of ARVC or variants of this
disorder even in the absence of classic right sided pathologies and /or
an initially normal work-up.
Stable Carbon Isotope Signature of Methane Released from Phytoplankton
Authors: Klintzsch Thomas , Geisinger Hannah , Wieland Anna , Langer Gerald , Nehrke Gernot , Bizic Mina , Greule Markus , Lenhart Katharina , Borsch Christian , Schroll Moritz , Keppler Frank
Published: February 2023

Aquatic ecosystems play an important role in global methane cycling and
many field studies have reported methane supersaturation in the oxic
surface mixed layer (SML) of the ocean and in the epilimnion of lakes.
The origin of methane formed under oxic condition is hotly debated and
several pathways have recently been offered to explain the ‘methane
paradox’. In this context, stable isotope measurements have been applied
to constrain methane sources in supersaturated oxygenated waters. Here
we present stable carbon isotope signatures for six widespread marine
phytoplankton species, three haptophyte algae and three cyanobacteria,
incubated under laboratory conditions. The observed isotopic patterns
implicate that methane formed by phytoplankton might be clearly
distinguished from methane produced by methanogenic archaea. Comparing
results from phytoplankton experiments with isotopic data from field
measurements, suggests that algal and cyanobacterial populations may
contribute substantially to methane formation observed in the SML of
oceans and lakes.
Channel Impulse Response Measurement for Characterizing The Ionosphere Communication Channel Over Java Island Indonesia
Authors: Dear Varuliantor , Iskandar Iskandar , Abadi Prayitno , Purnomo Cahyo , Husin Asnawi , Kurniawan Adit
Published: February 2023

For designing a digital High Frequency (HF) radio communication system
in the skywave propagation mode, Delay spread and Doppler spread are the
fundamental parameters of ionosphere channel characteristics that need
to be known. Although the International Telecommunication Union (ITU)
already provides general classification values for three different
regions and conditions as a recommendation, the empirical Delay spread
and Doppler spread values are still needed for an optimum design. As the
role of HF communication in Indonesia is still important and its
development technology is continued, the empirical data of ionosphere
channel characteristics are also needed. However, the comprehensive
empirical data of ionosphere channel characteristics over Indonesia is
difficult to find. In this research, we developed an Ionosphere Channel
Impulse Response (CIR) measurement system based on Software Defined
Radio (SDR) with purpose to obtain the empirical values of Delay spread
and Doppler spread. The measurement system is placed in Java Island
Indonesia, which is in the Low latitude - Equatorial Ionosphere Anomaly
(EIA) region. The specification of the system was determined based on
the increased values of ITU parameters for low-latitude regions in order
to be able to capture the possibility of higher values. The early
measurement result shows slightly different values from ITU
recommendation which is probably due to the EIA regions effect. This
system is ready to collect further data to characterize the ionospheric
communication channel comprehensively and investigate the space weather
impact on HF communication systems.
Micromechanics modeling on the prediction of soil-water characteristic curves
Authors: Guo Yadong , Bullard Jeffrey , Birgisson Bjorn
Published: February 2023

The soil-water characteristic curve (SWCC) plays an important role in
the prediction of soil performance. To predict the water film thickness
on the surface of grains, a chemical model is proposed by considering
the effects of van der Waals forces and electric double-layer forces.
Then a liquid bridge model is proposed to predict the relationship
between water content and matric suction of two contacted spherical
grains. By studying the microstructure and incorporating the liquid
bridge model into the representative volume element of soils, the SWCC
of soils is derived and the volume of water films corresponds to the
residual water content. The contact angle hysteresis is considered to
capture the SWCC hysteresis, and the concept of equivalent grain radius
is proposed to consider the effect of grain-size distribution. By
comparing test data and model predictions, it is found that the proposed
model captures the SWCC of soils well. Model predictions also reveal a
new swelling and shrinkage mechanisms of expansive soils. At a low water
content, the suction is huge for fine grains, and this causes the
shrinkage of expansive soils. When the water content approaches to be
saturated, the matric suction is negative and it forces the separation
of contacted grains. This contributes to the swelling of expansive
soils. It also reveals that the change of SWCC after wetting-drying
cycles arises from the microstructure change of soils. At a given water
content, the matric suction decreases with the increase of porosity.
The association of cusp-aligned arcs with plasma in the magnetotail implies a closed magnetosphere
Authors: Milan Stephen E. , Mooney Michaela K , Bower Gemma E. , Taylor Matthew G. G. T. , Paxton Larry J. , Dandouras Iannis S , Fazakerley Andrew , Carr Christopher M. , Anderson Brian J. , Vines Sarah Kimberly
Published: February 2023

We investigate a fifteen-day period in October 2011. Auroral
observations by the SSUSI instrument onboard the DMSP F16, F17, and F18
spacecraft indicate that the polar regions were covered by weak
cusp-aligned arc emissions whenever the IMF clock angle was small,
|θ|<45°, which amounted to 30% of the time.
Simultaneous observations of ions and electrons in the tail by the
Cluster C4 and Geotail spacecraft showed that during these intervals
dense (1 cm-3) plasma was observed, even as far from the equatorial
plane of the tail as |ZGSE| = 13 RE. The ions had a
pitch angle distribution peaking parallel and antiparallel to the
magnetic field and the electrons had pitch angles that peaked
perpendicular to the field. We interpret the counter-streaming ions and
double loss-cone electrons as evidence that the plasma was trapped on
closed field lines, and acted as a source for the cusp-aligned arc
emission across the polar regions. This suggests that the magnetosphere
was almost entirely closed during these periods. We further argue that
the closure occured as a consequence of dual-lobe reconnection at the
dayside magnetopause. Our finding forces a significant re-evaluation of
the magnetic topology of the magnetosphere during periods of northwards
IMF.