bluuebunny/crossref_metadata_2025 huggingface dataset:
THE ROLE OF THE MA KAUMAN PADANG PANJANG IN PRINTING THE MUHAMMADIYAH ASSOCIATION CADRE IN PABASKO
Authors: Irwansyah Irwansyah
Published: May 2022

This research was conducted entitled The Role of The MA KMM Kauman Padang Panjang in printing the Muhammadiyah Organization cadres in Pabasko. This research was conducted with the formulation of the problem 1. Efforts of MA KMM Kauman Padang Panjang in printing organizational cadres 2. Efforts of MA KMM Kauman Padang Panjang in printing community cadres 3. Efforts of MA KMM Kauman Padang Panjang in producing national cadres. This research was conducted in order to address the perceived shortage of cadres in the Padang Panjang area of ​​Batipuh X Koto. By conducting this research, the writer was able to know the role of MA KMM Kauman Padang Panjang in producing Persarikatan Muhammadiyah cadres, Ummat cadres and Nation cadres in MA KMM Kauman Padang Panjang.This research was conducted by field research method (Field Research) and is descriptive qualitative by conducting observations and interviews as data collection methods. As for the analysis and techniques for testing the validity of the data, it is done by grouping, presenting and drawing conclusions from the data obtained, then triangulation will be carried out for the validity and accuracy of the data obtained.Muhammadiyah business charity is a forum or a means to print and develop Muhammadiyah cadres which will then be transformed into organizational cadres, ummah cadres and national cadres. Those who have competencies and main characters as characteristics of their cadres.The result of this research is that MA KMM Kauman Padang Panjang has made various efforts in producing and producing cadres of the organization, the ummah and the nation. MA KMM Kauman Padang Panjang. as the charity of Muhammadiyah MA KMM Kauman Padang Panjang always makes innovation efforts to realize the target as a cadre school in the Muhammadiyah charity business environment. To achieve this goal, it is deemed necessary to have cooperation and collaboration between the leaders of the association and the leaders of business charities. In addition, as a business charity that focuses on preparing the younger generation of Muhammadiyah, MA KMM Kauman Padang Panjang should actually make the values ​​championed by Muhammadiyah be internalized and inspired by all its teaching staff.
Study of the kinetics of the process of producing pellets from red mud in a hydrogen flow
Authors: Khalifa Akhmed , Bazhin Vladimir , Ustinova Yana , Shalabi Mokhamed
Published: May 2022

The reduction kinetics of serial phase transitions of iron oxides during reduction to a metallized state with different modes of technical hydrogen supply has been studied and substantiated. The results of the pellets formation when 3-5 % molasses is added to the red mud as a binding reagent are presented. The dependences of the reduction rate of iron oxides on the hydrogen flow rate are obtained. Based on the results of the experiments, a kinetic model was constructed, and with the help of X-ray phase and spectral analysis, it was proved that the agglomerates formed after heat treatment received high strength due to the adhesion of reduced iron particles with red mud particles. The use of a new type of charge materials in melting units will reduce the amount of emissions and dust fractions, as well as increase the metal yield.
STUDI KELAYAKAN PENYERTAAN MODAL KABUPATEN PEKALONGAN KEPADA PIHAK KETIGA
Authors: Mahirun Mahirun , Sakhowi Akhmad
Published: May 2022

This study aims to examine the investment feasibility of Pekalongan Regency Government to third parties. Objects of this study are Bank Central Java, BPR BKK Bank Pekalongan Regency, BKK Kajen, and PDAM Tirta Pekalongan Regency. Data analysis tool uses Average Rate of Return, Net Present Value and Internal Rate of Return. The results showed that Bank Jateng, the feasibility study of the capital participation of the Regency of Nomenclature to PT Bank Jateng was feasible with ARR reaching an average of 129.33%, the IRR reaching 62.50%, and a positive NPV of Rp. 56,626,000,000. BPR BKK Pekalongan Regency, the feasibility study of equity participation in Peklaongan Regency to BPR BKK in Pekalongan Regency is feasible to be carried out with ARR reaching an average of 50.18%, IRR reaching 14.10%, and positive NPV of Rp. 2,851,417,641. BKK Kajen, the feasibility study of the equity participation of Peklaongan Regency to the BKK Kajen is feasible to carry out with ARR reaching an average of 10.04%, the IRR reaching 5.16%, and a positive NPV of Rp 20,474,809. PDAM Tirta Pekalongan Regency, the feasibility study of the equity participation of Peklaongan Regency to PDAM Tirta in Pekalongan Regency is feasible to be carried out with ARR reaching an average of 24.43%, an IRR of 19.48%, and a positive NPV of Rp. 2.711,894,398.
PENGARUH PENGGUNAAN HIDROKSI PROPIL METIL SELULOSA (HPMC) SEBAGAI GELLING AGENT TERHADAP SIFAT FISIK MASKER PEEL OFF EKSTRAK DAUN SIRIH (Piper betle L.)
Authors: Istiqomah Nurul , Anindhita Metha Anung
Published: May 2022

Peel off mask are cosmetic that use for facial skincare. Piper betle L. leaf has the properties to kill Staphylococcus epidermidis bacteria that cause acne. Peel off mask is a gel drug delivery system which requires gelling agent material. HPMC is one of the gelling agent that preferred properties. This study aims to examine the physical properties of Piper betle L. leaf peel off mask with HPMC as g gelling agent. The active substance used is Piper betle L. leaf extract that using maseration method. To determine the effect of using HPMC variation on physical properties it is carried out by organoleptic testing, viscosity, adhesion, dispersion, homogeneity, pH and irritation. The result of this study showed that the variation of HPMC had effect on organoleptic, viscosity, adhesion, dispersion and rate of drying and has no effect on homogeneity, pH, and irritation.

 
Keyword : Piper beatle leaf, peel off mask, HPMC
IDENTIFIKASI BAKTERI PADA AIR LIMBAH PENCUCIAN PEMBUATAN BATIK DI PEKALONGAN SELATAN
Authors: Oktaviani Nila
Published: May 2022

Batik di dareah Jenggot lebih banyak pembuatan batik cap, pembuatan batik tersebut memerlukan beberapa tahapan yaitu: pencucian kain mori terlebih dahulu dengan air sampaisemua kanjinya hilangsama sekali, penggambaran pola dengan cetakan tembaga yang dilapisimalam dan menggambar dengan cantingcap,proses pewarna dasar, proses pewarna lanjut dan proses pencucian kain dengan air mendidih. Pada prosespewarnaan batikmenggunakan pewarna kimia yang sangat berbahaya dan beracun (Sasongko dan Wildan, 2010). Penelitian ini dilakukan untuk identifikasi bakteri yang masih terdapat pada perairan yang tercemar limbah pewarnaan batik. Berdasarkan hasil  dari  ketiga  sampel air limbah  bak penampungan pencucian pewarna batik cap ada 2 bakteri yang konsisten teridentifikasi dalam air limbah tersebut diantaranya adalahKlebsiella pneumoniae dan Pseudomonas aeruginosa.Dari sampel yang diuji dengan tiga kali replikasi menunjukan ada beberapajenis bakteri yaitusampel pertama E.coli, Klebsiella pneumoniae, Pseudomonas  aeruginosa  kedua  dan  ketiga  hanya  Klebsiella  pneumoniae, Pseudomonas aeruginosa. Dimana dalam keadaan  keadaan normal memang dijumpai didalam tanah, maka bisa digunakan untuk bioremidiasi mengurai bahan organik dan logam yang dihasilkan oleh sisa pencucian batik.

 
Kata kunci : air limbah, bakteri, pencucian batik.
Assessment of the RIPASA Score in the Diagnosis of Acute Appendicitis in Khartoum State Hospitals, Sudan
Authors: Ahmed Mohammed Hashim Yousif , Hamza Aamir Abdallah , Mohammed Mansour Alawia , Abuaagla Khalid Yousif
Published: May 2022

Appendectomy is a common cause of emergency hospitalization, and appendectomy is one of the most common emergency procedures performed in modern medicine. Although it is a common problem, acute appendicitis remains a complex condition to diagnose, especially in the young, the elderly, and women of childbearing age. The aim was to evaluate the accuracy of the RIPASA score for patients with right iliac fossa pain (RIF) and suspected appendicitis. This study is an observational, analytic, and prospective cohort study conducted for one year. All patients suspected of having acute appendicitis and who underwent appendectomy were included in this study. All resected appendages were sent for histological examination. RIPASA scores were calculated for all patients. The study results in the 105 patients studied, 60 (57.1%) were predominantly male. The M/F ratio is 1.3/1. Most of the 98 patients (93.3%) were 40 years old. Most patients had symptoms within 48 hours 79 (75.2%). The most common symptom was anorexia (83.8%). All patients had RIF tenderness (100%). 95 (90.5%) patients had a score >7.5. On gross examination, three patients (2.9%) had a non-inflammatory appendix, 83 patients (79.0%) had a simple inflammatory appendix, the perforated appendix was found in 9 patients (8.6%), appendix mass was found in 6 patients (5,7%), and only four patients (3.8%) had an appendiceal abscess. The appendix was histologically inflamed in 69 patients (65.7%). The sensitivity of the RIPASA scoring system in our study was 69.5%, and the specificity was 70%. The diagnostic accuracy was calculated and was 69.5%. Our study's positive and negative predictive values (PPV, NPV) were 95.7% and 19.4%, respectively. Research conclusion RIPASA value of 7.5 is beneficial and easy to use. Therefore, surgeons can use it as a diagnostic guide for acute appendicitis to reduce the rate of misdiagnosis.
Utility of Neutrophil Lymphocyte Ratio (NLR) and Platelet Lymphocyte Ratio (PLR) as A Predictor of Mortality in COVİD-19
Authors: Sunil Riya , Ramesh Preethi Chikkanayakanahalli , Nagaraj Ashwini Hosahalli , Kadarappa Krupa
Published: May 2022

Coronavirus-19 pandemic has stricken our world since December 2019; the disease, first reported in China, is now a pandemic. More than 400 million people have been affected, and 5 million people have succumbed to the disease. Hence, it is the need of the era to find readily available laboratory parameters to assess the mortality chances in these patients. Our study aims to determine the utility of NLR and PLR ratios as a predictor of severity and clinical outcome of COVID-19 patients.100 patients admitted to a tertiary care hospital in Karnataka, India, during the months April to July 2020 were studied. Only patients with a positive RT-PCR (Reverse Transcriptase Polymerase Chain Reaction) report for COVID-19 were included. Demographic data, comorbidities, and mortality status were collected from electronic hospital records. Lab parameters including- Total Count (TC), Absolute count of neutrophils and lymphocytes, platelet count were taken. NLR and PLR were derived from available lab parameters. Patients were categorized into varying severity depending on their SpO2 levels at admission. Neutrophil count (P=0.001) and NLR (P=0.002) were associated with an increased risk of mortality and disease severity. An increase in PLR ratio (P=0.05) shows a mild association with mortality but not with disease severity (P=0.096). In contrast, comorbidities, increasing age, and gender did not show any statistical significance for mortality. The presence of statistical significance concerning NLR and PLR should be utilized as an aid by clinicians to assess disease severity and chances of mortality. As new variants of the disease are uprising and a single therapeutic measure is not available currently for the treatment of COVID-19, clinicians should be well informed about how to monitor the disease in a cost-effective and easily accessible way to reduce the disease mortality and morbidity.
The Relationship Between Prior Cancer Diagnosis and All-Cause Dementia Progression Among US Adults
Authors: Fowler Mackenzie E. , Wright Nicole C. , Triebel Kristen , Rocque Gabrielle B. , Irvin Marguerite R. , Kennedy Richard E.
Published: May 2022

Background: Cancer-related cognitive impairment (CRCI), a frequent effect of cancer and its treatments, shares common cognitive symptoms with dementia syndromes. Cross-sectional studies demonstrate an inverse relationship between cancer and dementia. However, the longitudinal relationship between dementia decline and cancer has not been investigated. Objective: To evaluate the association between cancer and longitudinal progression of dementia. Methods: We extracted electronic health record data from July 2003 to February 2020 from a single academic medical center. We identified dementia and cancer history prior to dementia using ICD-9/10 codes. We measured cognitive decline with the Alabama Brief Cognitive Screener (ABCs). We used adjusted linear mixed models to estimate baseline cognition and rate of progression by cancer history, including differences by race. Results: The study included 3,809 participants with dementia, of which 672 (17.6%) had cancer history. Those with cancer history had higher baseline cognition (β: 1.07, 95% CI: 0.45, 1.69), but similar rate of decline. Non-Hispanic Blacks had lower cognitive scores at baseline and throughout follow-up regardless of cancer status compared to non-Hispanic Whites and other races/ethnicities with and without cancer history. Conclusion: In this longitudinal retrospective study, participants with cancer history demonstrate better cognition at dementia diagnosis and no difference in cognitive decline than those without cancer history. Smoking and comorbidities attenuate this association and results indicate non-Hispanic Blacks have worse cognitive outcomes in dementia regardless of cancer history than other race/ethnicity groups. Further exploration of the role of smoking, comorbidities, and race/ethnicity on cancer and dementia-related cognitive decline is needed.
Secular Trends in Dementia Free Cognitive Function in Older Adults: A Systematic Review
Authors: Stephan Blossom C.M. , Tang Eugene Y.H. , Pakpahan Eduwin , Biswas Bijetri , Gupta Alisha , Fairley Andrea , Bosco Alessandro , Richardson Connor D. , Robinson Louise , Siervo Mario
Published: May 2022

Background: Although numerous studies have reported a decrease in dementia risk in the last two decades, it is unclear whether dementia-free cognitive function is also changing across generations. Objective: The objective was to systematically evaluate the published data on generational differences in cognitive function in the older population. Methods: Searches were performed on PubMed, Embase, and PsychInfo for articles published in English before 28 June 2021. Included studies were from population-based samples that reported generational differences in cognition in individuals without dementia, aged ≥60 years. Results: 28,101 studies were identified and 15 selected covering the period from 1971 to 2015: including studies from China, Europe, and the USA. The results show generally consistent findings of improvements or stability in dementia free cognitive function in later versus earlier born generations, but not for all cognitive domains. Prevalence of mild cognitive impairment and cognitive impairment no dementia has remained stable in the USA, UK, and China over the last two decades. Results: Prevalence of vascular related mild cognitive impairment has increased in China. Improvements in cognition may only partially be explained by increased educational attainment across generations. Conclusion: This review provides evidence for generational effects in dementia-free cognitive function, predominately stability or improvements in performance, in later compared to earlier born individuals across different world regions. There is an urgent need to determine the factors driving such changes and whether they are being experienced in all world regions, particularly low- and middle-income countries where the burden of cognitive impairment is greatest and rising.
Improved randomized response technique for estimating population proportion of a sensitive characteristic
Authors: Kaur Manpreet , Grewal Inderjit Singh , Sidhu Sukhjinder Singh
Published: May 2022

Getting correct answers to sensitive questions from the respondents and estimating the population parameters on variables that are sensitive in nature is prevailing problem in survey sampling. In the present research paper, the problem of estimation of the population proportion of sensitive characteristics has been studied. For this, an improved randomized response device has been developed by taking the two cases of the unrelated question, case-I: ‘when the proportion of unrelated characteristic is known’ and other case-II: ‘when the proportion of unrelated characteristic is not known’. Two estimators of the population proportion of a sensitive characteristic have been proposed, one for a known value of unrelated characteristic πy and the other for an unknown value, which were found to be unbiased. The expression for variances and unbiased estimates for the variances of the proposed estimators have been obtained. The optimum value of sample sizes has been worked out for which the minimum variance for the proposed estimators has also been obtained. An empirical study has been conducted and concluded graphically that proposed estimators are better than the estimators of Mangat (1992) and Tiwari and Mehta (2016).
Multivariate statistical methods: A brief review on their modifications and applications
Authors: Lipovetsky Stan
Published: May 2022

The work considers various multivariate statistical techniques in their modifications and applications to management, information systems, economics, decision making, and marketing research problems. The methods include eigenvectors for many-way matrices, dual partial lest squares, modified factor and cluster analyses, and enhanced canonical correlation analysis. These approaches have been applied in numerous real projects and proved to be useful for data analysts, managers, and decision makers in solving practical problems.
Using default logic for agent behavior testing
Authors: Douha Djamel , Mokhtari Aicha , Guessoum Zahia , Berghout Yasser Moussa
Published: May 2022

An agent is an autonomous entity that can perform actions to achieve its goals. It acts in a dynamic environment that may engender failures regarding its behavior. Therefore, a formal testing/verification approach of the agent is required to ensure the correctness of its behavior. In this paper, we propose a Default Logic formalism to abstract an agent behavior as knowledge and reasoning rules, and to verify and test the consistency of the behavior. The considered agents are implemented with JADE framework. Also, agent abstraction is translated into Answer Set Programming and solved by Clingo to generate dynamic and adaptive test cases of the agent behavior. The dynamic test cases allow predicting the agent behavior when a new information arises in the system.
Effects of multiple risk factors on upper limb musculoskeletal disorders among workers in inner Brazil
Authors: Lima da Silva Iris , Machado de Souza Eloyse Ricely , Karine Dias Silva Lara , Claudino da Silva Alline Thamyres , Norte da Silva Jonhatan Magno
Published: May 2022

BACKGROUND: The literature discussing musculoskeletal diseases of inner northeastern workers is scarce, although 67,559 cases were reported in Brazil between 2007 and 2016. OBJECTIVE: This study aimed to evaluate the effect of multiple risk factors that influence the symptoms of work-related musculoskeletal disorders (WMSDs) in wrists, elbows, and shoulders in workers from four different economic sectors. METHODS: A sample included 420 workers from the inner regions of the Brazilian states of Alagoas and Bahia. The Nordic Musculoskeletal Questionnaire was used to capture pain symptoms on both sides of the body (left and right). Sociodemographic variables, items from the biomechanical exposure and organizational conditional, in addition to other questionnaires (JCQ, COPSOQ II, ERI) were used to assess the characteristics and occupational risks of the respondents. Ordinal logistic regression model was using to identify the relationship between symptoms and factors. RESULTS: This study highlights the psychosocial, biomechanical, occupational, and sociodemographic variables contributed to development of WMSDs. Use of hand-vibrating tool increased the likelihood of symptoms manifesting on the body. On the other hand, high job control and high job insecurity reduced the likelihood of developing symptoms. On the other hand, high job control and job satisfaction reduced the likelihood of developing symptoms. Factors such as age, curved spine, high job insecurity and excessive commitment contributed to the development of WMSDs only on one side of the body. CONCLUSIONS: The development of WMSDs is multifactorial. Sociodemographic, occupational, biomechanical, and psychosocial factors may commonly contribute to WMSD manifesting only on one side of the body more than on both sides.
Different pattern of menstrual in patients with COVID-19 infections
Authors: Bakr Omnia B. , El-keky Alaa H. , Gamal Rania
Published: May 2022

OBJECTIVE: To investigate the impact of COVID-19 infection on menstrual pattern with or without use of anticoagulation therapy.

METHODS: A retrospective study was conducted on 175 female patients, diagnosed with COVID-19 to assess the pattern of menstrual changes after infection using an online based questionnaire.

RESULTS: There is highly significant results between number of menstruation days before and after COVID infection with P value (p<0.001) among the studied patients without use of anticoagulation. No statistically significant difference between without anti-coagulation and with anti-coagulation according to the effect of COVID-19 infection on menstrual flow, the number of menstrual flow days’ post COVID-19 infection, the number of pads per day post-COVID-19 infection, post-COVID-19 menstrual irregularity, if there is abnormal menstrual pattern after COVID-19 infection and action after abnormal menstrual pattern, with p-value (p>0.05 NS).

CONCLUSION: COVID-19 infection has a direct effect of menstrual pattern regarding the duration of menstruation in infected females irrespective of the use of anticoagulants in the treatment plane. However, it hasn’t direct effect on regularity or amount of menstrual flow.
Prototype of Monitoring and Controlling System on Gondola Cage Security Based Android Application
Authors: Dionova Brainvendra Widi , Junesco Vresdian Devan , Ananda Hapsari Anindya , Budi Priyono Sigit , Haryudiniarti Ayu Nurul
Published: May 2022

Gondola is one of the facilities used in high-rise buildings that are used to access the outside of the building. Gondola has a maximum load limit that is safe to transport it. Gondola is also often damaged in the cage caused by collisions on the side of the building. Until now, the gondola control still uses buttons which also often experience problems. This study aims to provide monitoring of the cage load and provide information about the distance of the cage to surrounding objects. Gondola control through an android application also includes this research in order to provide an alternative if the buttons on the gondola control experience problems. The short-term goal of this research is to carry out an innovation in the gondola field by conducting experiments through prototypes. The medium term goal is to apply the results of this research into a gondola. The results of this study control and monitoring can function properly even though the results produced are not yet accurate due to the imperfect quality of components, materials and assembly.
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI PRODUKSI PINANG DI KELURAHAN KUALA LAHANG KECAMATAN GAUNG KABUPATEN INDRAGIRI HILIR
Authors: Ramli  , Sawitri Nina , Afiza Yeni
Published: May 2022

Pinang merupakan tanaman perkebunan yang banyak di kembangkan oleh masyarakat Kabupaten Indragiri Hilir, khususnya di Kelurahan Kuala Lahang. Oleh karena itu perlu dilakukan analisis faktor-faktor yang mempengaruhi produksi pinang di Kelurahan Kuala Lahang Kecamatan Gaung Kabupaten Indragiri Hilir. Tujuan penelitian ini adalah : (1) untuk mengetahui faktor-faktor yang mempengaruhi produksi pinang di Kelurahan Kuala Lahang, (2) untuk mengetahui besarnya pengaruh faktor-faktor produksi pinang di Kelurahan Kuala Lahang. Metode ini yang digunakan adalah analisis regresi linear berganda. Penelitian ini menghasilan nilai R2 sebesar 84,6%, variabel yang berpengaruh signifikan terhadap produksi pinang di Kelurahan Kuala Lahang adalah luas lahan (α = 15%), herbisida (α = 1%) dan irigasi (α = 1%). Koefesien regresi masing-masing variabel adalah dengan nilai luas lahan sebesar 0,08, herbisida sebesar 241,04 dan irigasi sebesar 3,46.Kata kunci : Pinang, Faktor Produksi, Regresi Linear Berganda.The betel nut is commodity that many developed by the people in Indragiri Hili District, especially in Kuala Lahang sub-district. So necessary to analyze the factors that influencing the betel nut production.The aims of this study are : (1) to know the factors that influencing the betel nut production in Kuala Lahang, (2) to know how significant the influencing factors of the betel nut production in Kuala Lahang. The method used is multiple linear regression analysis. From regression analysis R2 is 84,6%, the variable that significant influence the betel nut production in Kuala Lahang is the land area (α = 15%), herbicides (α = 1%) and irrigation (α = 1%). Coofficient of regression of each variable is with a value land area of 0,08, herbicides of 241,04 and irrigation of 3,46.
ANALISA NILAI GIZI DAN UJI ORGANOLEPTIK BOLU PEPAYA SEBAGAI ALTERNATIF MAKANAN SELINGAN PADA HIPERKOLESTEROLEMIA
Authors: Nurhamidah  , Asmira Sepni , Anggia
Published: May 2022

According to the World Health Organization (WHO) in 2018, it was recorded that people with high cholesterol in Indonesia increased every year by 28%, this number is likely to increase to 29.25 in 2025. Papaya fruit is rich in nutrition, contains high fiber and antioxidants. Papaya fruit will be processed into sponge, which is a very popular food as a snack for hypercholesterolemia. The purpose of the study was to know the average value of the color, aroma, texture, taste of the sponge and to know the value of the fiber content of the best sponge. The method used in this study is an experiment using a Completely Randomized Design method consisting of four treatments and two replications. Treatment A (25 grams of papaya), treatment B (50 grams of papaya), treatment C (75 grams of papaya) and treatment D (100 grams of papaya). This research was conducted in July 2021. Sampling was carried out at the researcher's house, while organoleptic tests were carried out at the Perintis Indonesia University campus and the fiber content inspection site at Baristand (Industrial Research and Standardization Center Padang). Based on the results of the organoleptic test, it showed that the panelists' assessment of the papaya sponge product had a very significant effect on the color, aroma, texture, and taste of the papaya sponge. Based on the panelists' assessment, treatment A (pawpaw 25 grams) was the best product, namely color 4.3; fragrance 4.56; texture 4.42 and taste 4.72 with the highest average value of 18. Treatment A contained fiber content of 5.53 with a weight of 50 grams of papaya sponge. In this study it can be concluded that the best papaya sponge is treatment A, the best papaya cake contains fiber content which is very beneficial for hypercholesterolemic patients so that it can meet fiber levels per person in a day.
STUDI KADAR TANIN DAN INHIBISI OKSIDAN HASIL MASERASI BIJI PINANG WANGI DENGAN PERLAKUAN DAN TANPA PERLAKUAN ULTRASONIK
Authors: Rosalina  , Hibrah  , Yahya Agung Kurnia , Ikhsandy Ferry
Published: May 2022

Areca nut from Padang Pariaman as an export commodity is rich in tannin content and its ability as an antioxidant is used as the object of this research. The extraction of fragrant betel nut seeds has been carried out using the usual kinetic maceration method and the kinetic maceration method with ultrasonic wave irradiation pretreatment. The purpose of this study was to study the effect of ultrasonic irradiation on the tannin content, total phenol and antioxidant inhibition of the ethanol extract of areca nut seeds. A total of 20 grams of areca nut powder in a mesh variation of 20, 40 and 70 was extracted in 200 ml of ethanol with a solvent variation of 65% and 80%. Using three treatments, namely maceration treatment without ultrasonic irradiation, maceration with 15 minutes of ultrasonic irradiation pretreatment and the third treatment with 30 minutes of ultrasonic irradiation. The solvent was evaporated in a rotary evaporator and then tested for tannin levels using Follin Denish and DPPH reagents to measure antioxidants. The results of the highest tannin content were obtained in the third treatment, namely maceration with ultrasonic irradiation treatment 30 minutes, areca nut powder size 40 mesh, ethanol solvent 80% obtained tannin content of 12.5%. Meanwhile, the highest antioxidant activity was obtained at 70 mesh size, 80% ethanol solvent and the same treatment, which was 81.78.
Напружено-деформований стан пластини, яка послаблена круговим вирізом та посилена двома круглими накладками
Authors: Курєннов Сергій Сергійович , Барахов Костянтин Петрович , Вамболь Олексій Олександрович , Степаненко Володимир Миколайович
Published: May 2022

The problem of axisymmetric deformation of a structure was solved in this article. This structure consists of a plate that was weakened by a circular cutout and at the same time reinforced by two concentric round patches. The patches are glued overlapping on both sides of the plate, in the place of the cutout. The patches are joined to the main plate by a thin adhesive layer and perceive shearing and tearing forces. To solve the problem, some hypotheses were used, namely: it was assumed that the stresses were distributed uniformly over the thickness of the adhesive layer. For patches, the Kirchhoff-Love hypothesis is adopted. The adhesive layer is considered an elastic Winkler base. An axisymmetric problem is considered. It is assumed that the displacement of the layers depends only on the radial coordinate and doesn’t depend on the angular coordinate. The main plate is not subjected to bending due to the symmetry of the structure. This problem is a generalization of the classic model of the stress state of the adhesive joint for the rods to an area with radial symmetry. These assumptions have allowed obtaining a solution to the problem in an analytical form. The problem is considered separately in the adhesive joint area and as well as the outside of the adhesive joint area. In the area of gluing, the problem is reduced to a seventh-order differential equation concerning shear stresses. The solution to this problem is presented as an expansion into a functional series in terms of modified Bessel functions of the second kind. The obtained shear stresses make it possible to obtain normal stresses, as well as radial and transverse displacements of the layers in the adhesive joint zone. The displacements outside the adhesive joint zone were obtained from the well-known differential equations for the deformation of round plates in the absence of shear forces. The unknown coefficients in both cases are found from the boundary and conjugation conditions. The model task was solved. A finite element model of an adhesive joint has been developed. The largest size of the adhesive layer element is chosen to be sufficiently small and equal to half the thickness of the adhesive layer because of the enormous stress gradients in the adhesive layer. The results of the analytical model were compared with those results of the finite element model. The comparison showed the high accuracy of the proposed model.
Підвищення продуктивності фрезерування профільних пазів за рахунок удосконалення системи видалення стружки
Authors: Гнитько Олександр Миколайович , Кузнецова Анна Вадимівна
Published: May 2022

Among the effective, but insufficiently used at this time, reserves for improving the system of forced chip removal include the significant energy potential of the lubricating and cooling technological agent, which is fed into the cutting zone to lubricate and cool the cutting tool. A reason for this situation is the lack of a coherent concept for improving the chip removal system, as well as the practical lack of knowledge of the laws of their working processes when exercising a forced effect on the separated chips precisely when processing profile grooves. The foregoing testifies to the relevance and importance for the mechanical engineering of Ukraine of the task of creating high-performance forced chip removal systems for profile slot milling operations based on the development of a theory of their functioning. Because of the research performed, an important task has been solved, which is to increase the productivity of milling profile slots by using a forced chip removal system with rational parameters. Developed technical solutions for the chip removal system, which provides an increase in the productivity of profile slot milling. A systematic representation of the process of forced chip removal during profile slot milling has been developed, which made it possible to identify the required number of mathematical models. Particular and integral mathematical models of the functioning of the main subsystems and modules of the forced chip removal system have been developed. A simulation of the process of forced removal of chips is carried out. Based on modeling, a technique has been developed for determining the rational parameters of the forced chip removal system when milling profile slots. Experimental studies have been conducted aimed at determining the effectiveness of the proposed technical solutions and confirming the adequacy of the developed mathematical models. The created chip removal system provides an increase in the productivity of milling profile slots by approximately 2 times while maintaining the quality of surfaces and increasing the durability of the cutting tool by at least 3 times due to the use of a forced chip removal system with rational parameters.
Підвищення ефективності запалювання вакуумно-дугового розряду в джерелах плазми
Authors: Сисоєв Юрій Олександрович , Широкий Юрій Вячеславович , Торосян Олена Василівна
Published: May 2022

The analysis of the existing vacuum-arc discharge ignition systems showed the following ways to improve their efficiency: development of new design solutions for both individual units and the entire ignition system as a whole; the use of composite materials to fill the discharge gaps of starting devices; creation of new circuit solutions for power supplies of starting discharges; the use of non-traditional methods of ignition of a vacuum-arc discharge - the transition of a glow discharge into an arc one; using laser radiation to ignite the arc. Criteria for evaluating the reliability and durability of vacuum-arc discharge initiation systems in technological plasma sources are proposed, based on which complex studies of contact-type arc excitation systems with spark surface breakdown and two-stage launch systems with an autonomous plasma injector. Based on the performed studies, designs of vacuum-arc plasma sources with contact-type systems have been developed that ensure their performance in a certain range of technological parameters; The design of the ignition system turned out to be the most effective, in which the ignition electrode and the auxiliary anode are made as a single structural element in the form of a cut cone-shaped spiral. These design features, firstly, do not prevent the condensation on the surface of the starting discharge gap of a part of the metal evaporated by the cathode spot (CS) of the arc during the operation of the device, and secondly, they greatly facilitate the output of the CS from the place of initiation to the working end of the cathode. Here, the magnetic field, under the action of the CS moves, created by the current of the starting discharge itself, flows along with the turns of the cone-shaped spiral. This ignition system does not require a separate power supply and can operate in an automatic mode from the arc power source. To implement a non-contact method of arc excitation using a plasma injector, various designs of it were studied, when the discharge gap was filled with different materials; it was found that the resource of starting injectors when filling the discharge gap with M-7 ceramics does not exceed 104 operations, with 22XC ceramics at the level of 105 operations, and when using a composite material (CM), it exceeds 106 operations at ignition energy of 5 J, an operating pulse frequency of 1 Hz and arc duration 2 s. The developed composite materials are distinguished by increasing resistance to electric discharges and low surface breakdown voltage (up to 100…200 V/mm). Such characteristics are provided by the features of the CM structure, which is a dielectric glassy matrix filled with finely dispersed conductive particles and semiconductor components. The theoretical and experimental dependence of the arc ignition probability on the ignition energy during the operation of the injector in the electric film explosion mode are compared, showing satisfactory agreement between the results.
Алгоритм обробки сигналів для вертолітного широкосмугового шумового некогерентного радіовисотоміру
Authors: Волосюк Валерій Костянтинович , Павліков Володимир Володимирович , Жила Семен Сергійович , Церне Едуард Олексійович , Одокієнко Олексій Володимирович , Дьомін Андрій Павлович , Гуменний Андрій Михайлович , Попов Анатолій Владиславович
Published: May 2022

The algorithm for a helicopter or an unmanned aerial vehicle flight altitude measuring based on the processing of broadband and ultra-wideband pulsed stochastic signals has been synthesized for the first time by the maximum likelihood method. When formulating the initial data, mathematical models of the probing signal and the received observation are given, taking into account both various options for input path implementation, which impose restrictions on the observation equation form, and the geometry of the problem. When solving the problem, the statistical characteristics of the given models were found and studied. The calculated observation correlation function contains information about both the signal delay time and the radio pulse envelope, which makes it possible to obtain the algorithm for desired altitude parameter determining by one of two ways: differentiating the likelihood functional by the delay time or by the radio pulse envelope. At the same time, for the first time, the inversion equation for the statistical characteristics of the studied non-stationary processes in the frequency domain has been obtained. Such processes arise due to the presence of a radio pulse envelope. An important feature of the solved synthesis problem is a noise pulse transmitter use that implements the function of the underlying surface sounding, as well as taking into account the fact of the signal structure destruction during its radiation, propagation and reflection. Such a destruction of the signal shape doesn’t make it impossible to synthesize a radar with internal coherent processing algorithms when working on one receiving antenna and requires the search for other signal processing options. The use of a non-deterministic signal in the system also complicates the formalization of the delay time parameter in the likelihood function, since in this case the reference signal cannot be represented as a model or an analytical equation. Following the synthesized algorithm, a simulation model of a pulsed radar with a stochastic probing signal has developed and the results of its modeling are presented. The obtained output effect of the system fully corresponds to the classical theoretical calculations.
Comercio exterior en la frontera colombo-ecuatoriana: Pronósticos matemáticos de la balanza comercial
Authors: Mera Rodríguez Willington Gerardo , Vera Cepeda Luis Arturo
Published: May 2022

Las provincias de Esmeraldas, Carchi y Sucumbíos, por el lado ecuatoriano, y los departamentos de Nariño y Putumayo, por el lado colombiano, presentan unos fenómenos económicos oscilatorios interdependientes y recíprocos que generan temporadas de crisis y de auge comercial a cada lado de la frontera. El objetivo de este trabajo, en primer lugar, es indagar cuáles son las variables que determinan esos comportamientos tan particulares; y, en segundo lugar, proponer mecanismos de estabilización que, desde la generación de políticas locales, permita detener el péndulo de oscilación económica entre ambas franjas fronterizas, para generar así estabilidad económica.
Work-Life Management Challenges for Graduate Students of Color at an HBCU During a Pandemic
Authors: Allen- Milton Sharlene , Caldwell Nia , Popat Deval , Prout Tavril , Godwin Cherése
Published: May 2022

This article expands the student work-life discussion to include nontraditional graduate students of color. The Afrocentric theory is used as a conceptual framework. A collaborative inquiry approach was used to capture the reflections and experiences of three urban graduate students of color matriculating at a historically Black university during a pandemic. Six themes emerged: COVID-19, ties that bind, financial responsibility, linked fate, mental and physical well-being, and student work-life management. The article concludes with implications for education, research, and policy.
Unheard Voices: Transformative Workplace Learning and Support Experiences of Racialized Migrant Women English Instructors in Ontario Higher Education in Canada
Authors: Jun Justine
Published: May 2022

Racialized migrant women English instructors in higher education have been an underrepresented minority group of teaching professionals in Ontario, Canada. This study investigates highly experienced racialized migrant instructors’ workplace learning and support experiences. It aims to reveal how transformative their professional learning experiences are and how transformative their workplaces are in including them as newcomer community members. This article provides the literature review to demonstrate why this study was necessary and preliminary findings answering two research questions to display how equitable and inclusive Ontario higher education workplaces are to these understudied teaching professionals in Ontario. The study findings suggest that online professional communities can create a learning and development space for them by serving their unfulfilled needs in the workplace.
The Linguistic Phenomenon of Politeness in Trevor Le Gassick’s Translation of Ibn Kathir’s As-Sīra an-Nabawiyya (The Life of the Prophet Muhammad) (2006)
Authors: V Dina
Published: May 2022

The linguistic phenomenon of politeness has been studied as an area that flourished through the increasing body of knowledge in the field of cross-cultural pragmatics. As Blum-Kulka (1981) notes, “systems of social politeness seem to represent culturally colored interpretations of basic notions of tact, (e.g., face concerns) as conventionalized in any given culture or even speech event type” (p.258). Religious discourse has not received the attention it deserves as far as the linguistic analysis of the socio-pragmatic and pragma-linguistic politeness formulas in translation is concerned. By investigating selected passages for analysis from Trevor Le Gassick’s (2006) translation of Ibn Kathir’s As-Sīra An-Nabawiyya (The Life of the Prophet Muhammad), I aim to explore how the pragma-linguistic and socio-pragmatic functions of politeness formulas are rendered in translation. The methodology of analysis is based upon Blum-Kulka's two proposed dimensions of the means available for mitigating FTAs, as well as her model of cultural variation. First, I locate the polite utterance or redressive strategy to one of the two means, which are 1) directness/indirectness and 2) internal or external mitigation. Second, I examine the TT to find out whether the same linguistic forms exist in the target language, whether they have the same function, and whether their pragmatic value can be expressed by other means if their equivalents are not found in the target language. Third, I attempt to account for the difference or similarity in the use of that strategy using one or more of the four parameters identified by Blum-Kulka as constituting a model of cultural variation. These parameters are; 1) social motivation, 2) expressive modes, 3) social differentials, and 4) social meanings. The purpose is to highlight the (in)appropriate transfer of source language norms to target language situations, which is an important factor in the success or failure of the translation process. The analysis reinforces Blum-Kulka’s (1981) view that translation, as an attempt to render the locutionary and illocutionary acts, very rarely would have the same perlocutionary force on the target reader. Further, the results discussed in the analysis section go in line with her observation that “the more universal the rules governing the performance of any indirect speech act, the easier it will be to reconstruct it in a different language (p.98).
Menanamkan Kesadaran Bela Negara pada Anak Usia Sekolah
Authors: Permana Iman , Liswandi Liswandi , Azzahra Aulia , Tampubolon Bunga A.B , Liana Evita , Oeripan Kentaro Victor , Haliza Lila Nur , Felichia Lyanni , Anjeli Nyayu Tiara Berlian , Putri Pooja Maulaya , Munthe Ribka Hidayati , Apriliani Sabillia Orchida , Basyasyah Salwa Salsabila , Sembiring Sarah Dameria , Wijayanti Tabitha Vivi , Wibisono Yanuardi
Published: May 2022

Defending the State of Indonesia is the attitude and behavior of Indonesian citizens who are imbued with their love for the Unitary State of the Republic of Indonesia (NKRI) based on Pancasila and the 1945 Constitution. Socialization of defending the State is an effort to embed the values of defending the State towards the individuals of the Indonesian society. This socialization activity to embed the awareness of defending the State is directly aimed to the school-aged children to embed the importance of defending the State since early age. The socialization that has been carried out through online and offline methods is expected to be one of the key steps aimed at making the next generations love their own nation since early age, so they become individuals who love NKRI when they grow up in the future.
Optimalisasi Penggunaan Aplikasi Google Meet dan Zoom Meet Di Masa Pandemi Covid 19 Di Lingkungan Keluarga Besar Group C Paspampres
Authors: Dhamayanti Sylvia Kartika
Published: May 2022

This community service focuses on counselling the extended family of Group C Paspampres Lawang Gintung, Bogor, West Java. It was carried out to optimize the use of Google meet and Zoom cloud meetings in official activities, organizational activities for the wives of Paspampres members, and distance education for the sons and daughters of Paspampres members. This community service is expected to be able to contribute in the form of benefits, namely the opening of an understanding of the use of the Google meet and Zoom cloud meetings applications about how the Zoom cloud meetings and Google meet applications can be optimally used in activities both formally and informally without having to meet face to face during the Covid-19 pandemic. The specific goal of this community is to train the participants so that they can transfer the ability to their children. This community service is aimed at representatives of Paspampres members, civil servants, and wives of Paspampres members in the Paspampres Group C environment to be able to operate the Google meet and Zoom cloud meeting applications optimally so that they can be adapted to their individual needs. To be able to answer the goals of community service, this community service activity was carried out for one face-to-face and demo. The meetings were more focused on limited discussions to gather information about current conditions and expectations in the future, followed by demos using Google meet and Zoom cloud meetings.