bluuebunny/crossref_metadata_2025 huggingface dataset:
Protective immunization against Treponema pallidum using specific immune complexes--an attempt
Authors: Engel S , Diezel W , Sönnichsen N.
Published: August 2023

Rabbits were immunized using isolated and dissolved specific immune complexes obtained from patients suffering from early syphilis. After immunization the rabbits were infected intradermally with living Treponema pallidum. Some of them did not develop lesions at the infection sites. In comparison to controls there was a delayed and reduced production of antibodies. The effect of immunization may be induced by a treponemal protein antigen as a constituent of the specific immune complexes.
Psychological predictors of pruritus during mental stress
Authors: Fjellner B , Arnetz BB.
Published: August 2023

Experimentally-induced mental stress activates the psychoneuroendocrine systems. The cutaneous (itch and flare) responses of human skin to intradermal injection of histamine remain despite this unaltered. Major interindividual differences, however, exist in both neurophysiological reactions and cutaneous reactivity. The individual skin responses are interrelated to the urinary adrenaline response pattern. Psychosomatic status and psychosocial factors were in this study observed to be good predictors of skin responsiveness assessed by a multivariate model. We suggest that future studies on stress and pruritus should take these aspects into consideration. Knowledge of individual characteristics and coping strategies might help us understand why some patients suffer form itching in response to stress while others do not.
Persistent generalized lymphadenopathy: immunological and mycological investigations
Authors: Torssander J , Wasserman J , Morfeldt-Månsson L , Petrini B , Von Stedingk LV.
Published: August 2023

Immunological and mycological investigations were carried out in 21 Swedish homosexual males. One of them had AIDS, one pre-AIDS and 19 lymphadenopathy of whom 18 fulfilled the criteria of persistent generalized lymphadenopathy (PGL) as defined by the Centers for Disease Control, Atlanta, (CDC). The patients were investigated immunologically with respect to their in vitro lymphocyte reactivity to various mitogens. The patients with AIDS and pre-AIDS belonged to the group of 8 patients with low response to mitogens. Blood helper T cell percentages and serum beta 2-microglobulin concentrations correlated with the PHA reactivity. Three patients, with the diagnoses AIDS, pre-AIDS and PGL respectively, had clinical signs of oral candidiasis with rich growth of Candida albicans in culture. These were all low responders to mitogen stimulation. Six cases of tinea pedis were diagnosed and seemed to be distributed among the patients irrespectively of the severity of their immunological disorders.
PUVA therapy for palmoplantar pustulosis
Authors: Agren-Jonsson S , Tegner E.
Published: August 2023

Forty patients suffering from pustulosis palmoplantaris were treated with PUVA therapy. Thirty-six patients had palmar lesions which cleared in 31 cases; in 18 cases after an initial course of 3 sessions of treatment per week during an average period of 10 weeks, and in another 13 only after additional, less frequent continuation of the PUVA therapy. The average total UVA dose at clearing of the palmar lesions was 191 and the final UVA dose 7.3 J/cm2. After 2 years, 9 out of the 31 cases of palmar lesions were still completely healed, and the average duration of remission was greater than or equal to 15 months. For plantar lesions the results of PUVA therapy, using essentially the same procedure, were less satisfactory: healing being obtained in only 5 out of 34 cases. However, for palmar and plantar lesions alike, most patients have reported long-standing improvement from PUVA therapy. A surprisingly high frequency of nausea was noted as a side-effect.
Topical nitrogen mustard in early mycosis fungoides. A 12-year experience
Authors: Zachariae H , Thestrup-Pedersen K , Søgaard H.
Published: August 2023

A 12-year experience in thirty-three patients suffering from early mycosis fungoides in plaque stage confirms the effectiveness of topical nitrogen mustard therapy. Fourteen patients were in complete remission at the latest time of observation and 7 in partial remission. The probability of freedom from relapse was approximately 50% after 6 and 12 years. Three deaths attributable to mycosis fungoides were recorded. Three patients had to discontinue treatment due to contact dermatitis to nitrogen mustard. Specific precautions were undertaken in order to protect personnel handling the drug. No damaging or toxic effects were observed among staff personnel and no hematological side-effects were observed among the patients. The treatment as a whole was well tolerated.
Ultrastructural studies on experimental hair infections in vitro caused by Trichophyton mentagrophytes and Trichophyton rubrum
Authors: Kaaman T , Forslind B.
Published: August 2023

Experimental infections with Trichophyton mentagrophytes and Trichophyton rubrum were performed on human hair in vitro and studied by conventional light microscopy, scanning (SEM) and transmission (TEM) electron microscopy. The penetrations visible by light microscopy in hair infected with T. mentagrophytes appeared at SEM as disrupted surface areas with perforating holes. T. rubrum-infected hair displayed minute perforations and less conspicuous cuticular damages seen at SEM and TEM. In both organisms multiple tiny perforating holes were observed at SEM previously unnoticed in experimental hair infections. From a morphological point of view the differences between the fungi investigated in this experimental system seem to be more of a quantitative nature than involving different mechanisms of action.
A rapid fixation technique of epidermis for electron microscopy
Authors: Andersson A.
Published: August 2023

A rapid processing technique for ultrastructural studies of human epidermis has been devised in order to reduce dislocation of soluble compounds and to make available sections for diagnostic purposes within reasonable time (ca 4 hours). The morphology of cellular components agreed with or improved upon that obtained after commonly used methods. Thus, for example, the substance in the intercorneal space was better preserved and the cytomembrane and certain of its specializations appeared more distinct.
Urinary excretion of melanocytic metabolites in fertile women
Authors: Carstam R , Hansson C , Rorsman H , Rosengren E , Sjöberg NO , Wirestrand LE.
Published: August 2023

Pregnant women and women taking oral contraceptives show urinary excretion values of 5-S-cysteinyldopa and of 6-hydroxy-5-methoxyindole-2-carboxylic acid in the same range as nonpregnant women not taking oral contraceptives. The excretion of these melanoma markers can therefore be used in in the biochemical diagnosis of metastatic melanoma in pregnancy and in women taking oral contraceptives.
Contact allergy to 3-methylol phenol, 2,4-dimethylol phenol and 2,6-dimethylol phenol
Authors: Bruze M , Zimerson E.
Published: August 2023

Thirteen patients with contact allergy to phenol-formaldehyde resins (P-F-R) were patch tested with 3-methylol phenol, 2,4-dimethylol phenol and 2,6-dimethylol phenol. Nine patients reacted to at least 1 compound, all giving positive test responses to 2,4-dimethylol phenol. Seven patients reacted simultaneously to 2,6-dimethylol phenol while only 1 patient reacted to 3-methylol phenol. Negative test responses were noted in 20 controls. Chemical investigation by high pressure liquid chromatography indicated that the compounds tested were pure and separable. The 3 reported sensitizers may, theoretically, be generated during the manufacture of P-F-R. 2,4-Dimethylol phenol and 2,6-dimethylol phenol have been demonstrated and there has been chromatographic evidence of 3-methylol phenol in the P-F-R used in the routine test series at the department.
Retinoid dermatitis mimicking progression in mycosis fungoides: a report from the Scandinavian Mycosis Fungoides Group
Authors: Molin L , Thomsen K , Volden G , Lange Wantzin G.
Published: August 2023

A dermatitis occurring during the treatment of mycosis fungoides with A vitamin analogues (13-cis-retinoic acid and etretinate) and mimicking a progression of the disease is described. It is considered to be a skin reaction due to the treatment. Its benign nature is revealed by histology showing a lymphocytic infiltrate without any atypical sign.
Sweet´s syndrome and pyoderma gangrenosum associated with ulcerative colitis
Authors: Benton EC , Rutherford D , Hunter JA.
Published: August 2023

A young woman with ulcerative colitis developed pyoderma gangrenosum during the active phase of the disease and Sweet´s syndrome (acute febrile neutrophilic dermatosis) three months after panproctocolectomy.
What students value in their teachers – an analysis of nominations to a teaching award
Authors: Wennerberg Jeanna , Bolander Laksov Klara , West Tore
Published: August 2023

Teaching awards have become a way to acknowledge the importance of high-quality teaching for many higher education institutions. The purpose of this study is to investigate which images of the “good educator” emerge in students’ nominations for a teaching award at a Swedish university, and how these images relate to the gender of nominees and nominating students. We want to explore possible bias linked to gender and stereotypical notions of female and male in teaching. All 194 nominations (made in 2018) were analysed and clustered into categories. The results are discussed from a critical theoretical perspective and show qualitative differences regarding the traits and skills used to describe male and female teachers, and that male teachers were nominated more by both male and female students. We believe that becoming aware of possible bias will help decision-makers of teaching awards become more gender sensitive.
The Inlay of San La Muerte as Configurations of the Passionate State of Faith
Authors: Ivan Bonda Cesar
Published: August 2023

In this presentation we explore the relationships between human bone and the magical-religious ritual use in Northeastern Argentina and southern Paraguay; we approach this problem from the conceptualization of the santera practice as producer of popular sacred art, attending to (a) the use of bone in the carving of the imagery of San La Muerte and (b) its valuation as powerful talisman beyond having been, or not, sculpted in the form of the Saint. We intend to contribute to the description and understanding of part of the religious imagination of Northeastern Argentina and Southern Paraguay, and its derivations and relations with the production of sacred material culture. For the treatment of this problem, fieldwork has been carried out among the population of Catholic faith, prioritizing the ethnographic method were implemented in-depth interviews with devotees and santeros, observations with varying degrees of participation, records in journals and field notes, as well as documentary analysis and varied images.In this presentation we explore the relationships between human bone and the magical-religious ritual use in Northeastern Argentina and southern Paraguay; we approach this problem from the conceptualization of the santera practice as producer of popular sacred art, attending to (a) the use of bone in the carving of the imagery of San La Muerte and (b) its valuation as powerful talisman beyond having been, or not, sculpted in the form of the Saint. We intend to contribute to the description and understanding of part of the religious imagination of Northeastern Argentina and Southern Paraguay, and its derivations and relations with the production of sacred material culture. For the treatment of this problem, fieldwork has been carried out among the population of Catholic faith, prioritizing the ethnographic method were implemented in-depth interviews with devotees and santeros, observations with varying degrees of participation, records in journals and field notes, as well as documentary analysis and varied images.
The Religiously-Inspired Political Polarization of South Asia the Genesis of the Creation of Pakistan
Authors: Raza Ahmed
Published: August 2023

In 1880, Sir William Patrick Andrew published “Our Scientific Frontier”, a book containing the essence of his colossal work stretched over four decades of career as the father of British India Railways. Conceding to his recommendations, dogged by obsessive fear of the Russian invasion of India (Thorburn, 1894), the northwest frontier region of the Indian Peninsula, popularly known as the “Borderlands” was separated from the mainland India and, created as an independent state; named Pakistan in 1947 to serve as a “Frontline State” juxtaposed to the “Buffer State” of Afghanistan (Andrew, 1880) under the garb of an independent homeland for Muslims in India on religious grounds (Wink, 1991) (Chandra, 1997 ). However, being suspicious of imminent revolt by the local population, especially the Punjabi peasantry resulting from the British purge during their rule, Sir Andrew strategized the concept of fragmenting the “already polarised” Muslim community into two distinct segments; the elite class as the ruling component unflinchingly loyal to the British and the non-elite segment, though in majority but clutched by “the devised mechanism” of the religion of Islam. Conceiving the idea of “Bigoted Fanaticism”, he envisaged an impenetrable demographic defensive line against any invader from the northwest (Afghanistan) and the west (Iran) (Andrew, 1880). Based on his conclusion that “in these border lands (Pakistan) to have a rival in prestige and power would be dangerous; to have a superior would be impossible”, the British nurtured the chosen elite to rule the country but, geo-strategically serve the western interests. This is how the legacy of the British rule is still entrenched in which “the ReligioPopulist Dogmatism” plays the most crucial role in the national politics. A study had been conducted to investigate the genesis of the religio-populist dogmatism in Pakistan which has always been employed as the most potent instrument in political campaigns in Pakistan by every political party irrespective its religious inclinations.
Consider Zinc Deficiency in Infants with Periorificial Lesions
Authors: Sara El-ammari
Published: August 2023

Background: Zinc is an essential trace element required for proper bodily function. Its deficiency can lead to various manifestations, including dermatological issues. There are two forms of zinc deficiency: hereditary and acquired. Case Report: We present two cases. The first case involved a child with a family history of two brothers who passed away at the age of 1 year, exhibiting a similar symptomatology. The second case involved a patient with hereditary epidermolysis bullosa and malnutrition. Both cases presented with erosive erythematous lesions around the mouth and extremities, which were unresponsive to symptomatic treatments. Additionally, they experienced diarrhea. A definitive diagnosis was made by measuring the levels of zinc in their blood, which were found to be low. Treatment with oral zinc sulfate was prescribed. The first patient showed rapid improvement with the treatment, but experienced recurrence when it was discontinued and subsequently improved again upon reinstatement. Unfortunately, the second infant passed away due to complications from an infection. Conclusion: The presence of periorificial and extremity lesions in infants should raise suspicion of zinc deficiency. Measuring zinc levels in the blood can help confirm the diagnosis and guide appropriate treatment
A Rare Manifestation of Porokeratosis
Authors: Singh Shreya
Published: August 2023

A 45-year-old female presented with multiple dark coloured, severely itchy lesions all over the body since three years. On examination, there were multiple discrete as well as coalescing geographical plaques with central clearing and hyperpigmented raised irregular borders distributed over face including post auricular area, neck, upper chest, lower abdomen, groins, buttocks as well as bilateral upper and lower limbs (Figures A-F).
Palmar Tinea nigra Non-Invasive Diagnosis with Dermoscopy, Reflectance Confocal Microscopy and Microbiology
Authors: Carmo Gabriella Campos-do-
Published: August 2023

Tinea nigra is an uncommon superficial mycosis caused by the darkly pigmented fungus Hortaea werneckii. which occurs mainly in tropical and subtropical regions. Clinically, it is characterized by a brown-to-black asymptomatic macule, with well- defined edges, most commonly affecting the palms and soles. We report a case of palmar Tinea nigra and the features found on dermoscopy, reflectance confocal microscopy and microbiology. It is important to recognize this disease early for proper treatment and to distinguish it from other melanocytic lesions with worse prognoses, such as melanoma.
Augmented Reality Technology Applied to Surgical Planning in Oncological Colorectal Surgery
Authors: Fernando Trebolle Jose
Published: August 2023

This paper describes the application of augmented reality technology from three-dimensional colon models as a method of preoperative planning in oncological colorectal surgery. We have developed holograms of augmented reality from threedimensional anatomical models of the colon, obtained from computed tomography images (Siemens Somatom Perspective 64) with abdominal image cuts 3 mm thick. The recovery of the images was in DICOM format. The processing to achieve the threedimensional reconstruction was performed with the program OsiriX, which made a complete segmentation of the colon surface and modified the image density. 3D models were obtained of the isolated colon and in relationship with the bony structures. The smartphone Colon 3D AR application was designed (increased hyper experience- visualizer with SLAM technology) to apply augmented reality technology. An individualized hologram of augmented reality (scale 1:1) was created from each three-dimensional model. A projection with the smartphone on the patient's abdomen was made by modifying the position in the height of the reconstruction, using the pelvic bones as an anatomic reference point to calibrate the hologram's orientation. Three-dimensional reconstruction of the tumor in the preoperative plan of oncological colorectal surgery, combined with hyperreality technology, allows developing augmented reality models to improve colon anatomy knowledge and plan the surgical technique. The application is easy to use and may have advantages in preoperative colon surgery planning.
Tuberous Sclerosis with Typical Neuroimaging Findings-A Case Report
Authors: Kumar Dinesh
Published: August 2023

Tuberous sclerosis (TS) is an autosomal dominant disorder, also known as Bourneville-Pringle disease. The disease is classically characterized by the presence of hamartomatous growths in multiple organs. TS and tuberous sclerosis complex (TSC) are different terms for the same genetic condition. The major sign and symptoms include, central nervous system manifestations including epilepsy, cognitive impairment and autism spectrum disorders, cutaneous, cardiac, renal and ophthalmic manifestations with Epilepsy being the most common symptoms and affects 70% - 90% of patients.
The Hidden Dance of Gut Neurons: Unraveling Neurogen
Authors: J Kumar
Published: August 2023

“The findings are noteworthy because they provide a better knowledge of how our stomach neural system works. The continual turnover and regeneration of nerve cells is critical to the health of the stomach. This research may also have implications for understanding and treating diseases involving the neural system of the stomach, such as gastrointestinal problems. Overall, it's an interesting discovery that calls into question our assumptions about nerve cells in the adult stomach and opens up new avenues for future research”
Machine Learning Prediction of Time Series Covid-19 Data in West Java, Indonesia
Authors: Yulita Intan Nurma , Afrida Helen  , Mira Suryani
Published: August 2023

In 2019, the COVID-19 pandemic appeared. There have been several efforts to curb the spread of this virus. West Java, Indonesia, employs social restrictions to prevent the spread of this disease. However, this method destroyed the economy of the people. If no instances were detected in the region, the World Health Organization (WHO) authorized the social restrictions to be relaxed. If the government lifts the social limitation, the decision must also consider the potential of future confirmed instances. By utilizing machine learning, it is possible to forecast future data. This work utilized the following algorithms: linear regression (LR), locally weighted learning (LWL), multi-layer perceptron (MLP), radial basis function regression (RBF), and support vector machine (SVM). The study investigated daily new instances of COVID-19 in West Java, Indonesia, from March 2, 2020, to October 15, 2020. The RBF algorithm was the best in this investigation. Mean absolute error (MAE), root mean squared error (RMSE), mean absolute percentage error (MAPE), and relative absolute error (RAE) were 48.85, 89.73, 88.67, 62.99, and 60.88, respectively. The RBF prediction model may be proposed to the government of West Java for assessing data on COVID-19 instances, particularly in social restriction management. It is anticipated that West Java would have a minimum of 275 new cases every day for the following 30 days beginning on October 16, 2020. Consequently, the easing of societal limitations requires careful consideration.
Knowledge Management System Evaluation Using DeLone McLean Model: A Case Study of IT Service Desk Bank XYZ
Authors: Desiana Nurul Maftuhah  , Lia Ellyanti  , Dana Indra Sensuse  , Damayanti Elisabeth  , Nadya Safitri  , Sofian Lusa
Published: August 2023

Bank XYZ is one of the biggest banks in Indonesia. It has IT Service Desk function under Information Technology Division that specifically handles complaints or problems related to IT. Knowledge management in IT service desk can help to increase the availability of information and knowledge for the IT service desk team who must provide explanations to users. IT Service Desk of Bank XYZ has built knowledge management system using open-source platform since 2017. It is called SDKPedia which was developed inhouse by IT Service Desk team and never been evaluated since it was built. The objective of this study is to evaluate SDKPedia as knowledge management system used in IT Service Desk Bank XYZ. Evaluation was carried out based on Delone and McLean assessment criteria. Survey is distributed to IT Service Desk worker and 31 valid feedback is used in this study. To determine the indications that have a substantial impact and result in a net advantage for SDKPedia, the PLS-SEM algorithm is utilized. Service quality is the only exogen latent variable that affected intension of use. While the other two exogen latent variable are system quality and information quality, did not have significant impact for intention to use or user satisfaction. Considering the findings of this study, several improvements can be made by the IT Service Desk manager to make the quality of SDKPedia better. The points that need more attention are information quality and system quality.
Comparison Performance of K-Medoids and K-Means Algorithms In Clustering Community Education Levels
Authors: Dwi Aulia Diana , Nurahman Nurahman
Published: August 2023

Education is a mandatory right of all citizens and the key to the nation's superiority in global competition that must get top priority to be examined critically and comprehensively. It is known that compulsory education is at least 12 years, but not all people can do it because of minimal economic conditions. In past years, COVID-19 has also had an impact on the economy, school dropout rates, and falling academic achievement, for example in Central Kalimantan. The size of Central Kalimantan, however, makes it difficult for the government to identify the areas with the worst levels of education. To determine which regions fall into the low and high education categories, it is required to group the province's educational levels. This study also compares two algorithms by measuring their accuracy. By looking at which algorithm has the lowest Davies Bouldin Index (DBI) value, the best degree of performance can be ascertained. To process the data from as many as 1,565 sources, data mining techniques, including the clustering method, were used. K-Means and K-Medoids algorithms were employed in this work as clustering techniques. Based on the outcomes of the cluster created, both algorithms are also put to the test for performance. The results of this study obtained 6 clusters in K-Means with the lowest DBI value of -0.439, while the results in K-Medoids were in 3 clusters with the lowest DBI of -0.866. Based on accuracy testing using DBI, it is known that K-Means results are more optimal with the lowest DBI value in the grouping of education levels compared to K-Medoids. It is also known from the formation of 6 clusters of the K-Means algorithm that the low education level is in cluster_0 which is 1484 villages and the higher education level is as many as 3 villages in cluster_3.
Sentiment Analysis of Nanovest Investment Application Using Naive Bayes Algorithm
Authors: Pradana Lelianto Eko , Ruldeviyani Yova
Published: August 2023

Various applications provide simple ways for individuals interested in investing in crypto assets or stocks - both domestic and international - to do so. One of the companies in this industry, Nanovest, has launched the Nanovest investment application. Since its release in 2022, numerous positive and negative responses have been on Google Play, the App Store, and Twitter. However, Nanovest faces two main problems regarding the use of its application. First, they often receive complaints submitted to the operational team, indicating dissatisfaction or problems faced by users. Second, Nanovest has never conducted formal research regarding user experience in using their application. This indicates a lack of understanding of the perspectives, needs and challenges faced by users. This study tries to find out how the public responds to the Nanovest application through a sentiment analysis. This study used tweet and review data from January 1, 2022, to February 17, 2023. The data underwent sentiment analysis, employing the Naïve Bayes algorithm, and were classified into positive and negative sentiments. The findings revealed that 96.07% of the sentiments expressed towards Nanovest were positive, while 22.11% were negative, with these percentages calculated based on the total number of sentiments detected in the data. To evaluate the model's performance, a 10-fold cross-validation approach was utilized alongside the Naïve Bayes algorithm, resulting in an impressive accuracy rate of 94.8391%. This positive sentiment suggests that users are highly favorable towards the crypto assets and global stock investment services offered by the Nanovest application. Nevertheless, 3.93% of users still expressed dissatisfaction with the app due to some flaws that existed when Nanovest was initially launched. Based on the results that have been obtained and analyzed for the development team, it is recommended to make three improvements, namely reducing application size to minimize memory usage, increasing overall application performance, and increasing access speed across all features to allow application users to access more efficiently. It is recommended for the product team and stakeholders to consider developing the Candlestick chart feature into the application. This also increases the competitiveness of the Nanovest application against other applications.
Method of normal oscillations and substantiation of the choice of parameters for certain nonlinear systems with two degrees of freedom
Authors:   Hetman Petro Sahaidachnyi National Ground Forces Academy, Sokil B. I. , Senyk A. P. ,   Lviv Polytechnic National University, Sokil M. B. ,   Lviv Polytechnic National University, Lisnichuk A. Ye. ,   Lviv Polytechnic National University
Published: August 2023

On the example of the plane model of wheeled vehicle oscillations with adaptive power characteristic of the suspension system, the methodology for selecting its main parameters that would maximize the movement smoothness is developed. To solve this problem, the mathematical model of relative oscillations of the sprung part is constructed, provided that they are carried out in the vertical plane. The latter represents the system of two nonlinear differential equations describing the relative displacement of the center of mass of the sprung part and the angle of rotation of the latter around the transverse axis passing through the center of mass of the specified part. To construct the approximate analytical solution of this equations system, and thus to describe the main parameters that determine the relative position of the sprung part under reasonable assumptions, the method of normal oscillations of nonlinear systems with concentrated masses is used. This made it possible to obtain the system of ordinary differential equations of the first order that describe the amplitude–frequency characteristics of the sprung part vibrations. Due to the analysis of the latter it is determined that at a certain ratio between the parameters describing the power characteristics of the suspension system, it can perform isochronous vertical and longitudinal–angular oscillations, and thus it is possible to achieve maximum comfort in transporting passengers or dangerous cargo over rough terrain. The main obtained results can be used to create the software product for adaptive suspension, and their validity is confirmed by: a) in passing to the limit, obtaining results known from literary sources; b) generalization, based on the use of periodic Ateb-functions, of widely tested analytical methods for constructing solutions of differential equations with strong nonlinearity.
Modeling and mathematical analysis of drug addiction with the study of the effect of psychological and biological treatment
Authors:   Laboratory of Analysis, Modeling and Simulation, Department of Mathematics and Computer Science, Faculty of Science Ben M'sik, University of Hassan II, Casablanca, Morocco, Moumine E. M. , Balatif O. ,   Laboratory of Fundamental Mathematics and Their Applications, Department of Mathematics, Faculty of Sciences El Jadida, Chouaib Doukkali University, El Jadida, Morocco, Rachik M. ,   Laboratory of Analysis, modeling and simulation, Department of mathematics and computer sciences, Faculty of sciences Ben M'Sik, University Hassan II of Casablanca
Published: August 2023

In this article, we propose a discrete mathematical model which describes the propagation of the drug phenomenon in a human population. The population is unscrewed in five compartments: "S" People likely to become drug addicts, "M" Moderate drug addicts, "H" Heavy drug addicts, "T" People receiving drug addiction treatment, "R" The recovered people who have completely abstained from drug addiction. Our goal is to find a better strategy to reduce the number of heavy addicts and to maximize the number of people receiving full treatment. The tools of optimal control theory were used in this study, in particular the Pontryagin maximum principle.
Comparison of the efficacy of LigaSure and laser for grade 2-3 hemorrhoids
Authors: Taşkin Ali Kemal , Özçetin Bülent
Published: August 2023

Aim: The aim of this study is to compare the efficacy of LigaSure and LH procedures in the treatment of grade 2-3 hemorrhoids.

Material and methods: Demographic and clinical data of the patients were recorded retrospectively. A visual analogue scale (VAS) was used to evaluate the pain intensity of the patients after the procedure and a Likert-type scale was used to evaluate patient satisfaction surveys 6 months after the procedure.

Results: Of the 66 patients, (mean age: 42.12±11.92 years, %72,7 male) 34 underwent LH procedure whereas 32 underwent LigaSure procedure. Spinal anesthesia was applied for 64 patients and general anesthesia was applied for 2 patients. Procedure time and time to return to work were significantly shorter in the LH group compared to the LigaSure group (900 vs. 1200 seconds, p<0.001, and 3.64±1.29 vs. 14.46±3.73 days, p<0.001). Late complications (abscess, relapse, pruritus, and seromucous discharge) were more common in the LH group, but the difference was not statistically significant (23.5% vs. 6.3%, p=0.08). VAS pain scores were significantly lower in the LH group (p<0.001). Although there was no significant difference between the treatment groups in terms of patient satisfaction, relapse was significantly less common in the LigaSure group (p=0.045).

Conclusion: In patients with grade 2-3 hemorrhoids, LH may be preferred over LigaSure due to greater patient comfort, higher satisfaction rates, and fewer early complications. However, close follow-up of these patients is important due to the higher incidence of late complications with LH.
Evaluation of early functional outcome of arthroscopic decompression in chronic primary sub-acromial impingement syndrome
Authors: Samanta Pritam , Chopra Rajesh Kumar , Prakash Jatin , Jaiman Ashish
Published: August 2023

Background: Sub-Acromial Impingement Syndrome (SAIS) spectrum ranges from acute inflammation to chronic degeneration of the bursa and of rotator cuff tendons in sub-acromial space. It may lead to a full-thickness tear of rotator cuff tendons and degenerative joint disease of the shoulder girdle leading to functional loss and disability if not treated early and adequately. This study aimed to determine the early functional outcome of arthroscopic sub-acromial decompression in chronic SAIS due to mechanical causes.

Material and methods: This was a prospective cohort study. Patients were operated on arthroscopically for sub-acromial decompression between September 2018 and March 2020. Thirty-five patients with a range of 20 to 65 years of age diagnosed clinically with primary chronic sub-acromial impingement syndrome meeting the inclusion criteria were included in this study. All the patients under study were initially kept for at least four weeks of a course of conservative treatment and persisted in having symptoms were treated surgically with arthroscopic sub-acromial decompression. The UCLA (The University of California at Los Angeles) shoulder rating scale was used to assess shoulder function. The assessment was done in the pre-operative period, four weeks, 12 weeks, and 16 weeks post arthroscopic sub-acromial decompression surgery.

Results: Compared to pre-operative UCLA shoulder function score at the end of non-operative conservative treatment, the patients under study showed a statistically significant improvement at the end of the 16th week of post-arthroscopic subacromial decompression (p<0.0001).

Conclusion: This study concludes that arthroscopic sub-acromial decompression provides a good functional outcome in patients having primary shoulder impingement due to extrinsic mechanical causes such as shape and slope of the acromion in the absence of significant (total or near total) rotator cuff tear after 16 weeks of follow-up.
Side effects after first and second doses of Covid-19 vaccine among health care providers in tertiary care hospital
Authors: Singh Preeti , Choudhary Ruchi , Matreja Prithpal Singh , Patrick Shilpa , Kumar Devesh , Singh V K
Published: August 2023

Background: Acceptance of Covid-19 vaccination among the general population is one topic that has been discussed worldwide. Large number of doses of vaccine has been administered throughout the world, but, concerns about safety of Covid-19 vaccination still persists. There have been reports of adverse effects with Covid-19 vaccination which are mild and resolve spontaneously. This study was done to evaluate the side effects after first and second doses of Covid-19 vaccine among health care providers in tertiary care hospital.

Material and methods: This cross-sectional, questionnaire based study was done among health care workers after first and second dose of vaccine in Teerthanker Mahaveer Medical College & Research Center, Moradabad, India between January 2021 to July 2021. In this survey, post Covid-19 vaccination questionnaire was designed using Google Forms and was shared to vaccinated participants through social media and mail. Snowball sampling method was used for gathering a total of 485 responses. Informed consent was obtained from all research participants and the study was approved by the Institutional Review Board (IRB)

Results: The respondents were health care professionals which included Physician, Surgeons, and Other Health Care Workers.  The most common adverse effects reported after both doses of vaccination were fever, chills and rigor, headache, myalgia, malaise and pain at site of injection. The results showed that 65% (n=338) of participants had mild symptoms like headache, fever, pain at injection site, malaise, myalgia, dizziness, nausea and vomiting after first dose of vaccination. In comparison 39% (n=190) of participants reported mild symptoms after the administration of second dose of vaccination. A total of 63% (n=330) and 41% (n=197) participants took medication for relief of symptoms during post-vaccination period after the first and second dose of vaccine with slight female preponderance.

Conclusion: The most prevalent adverse effects following vaccination were nausea and vomiting, headache, dizziness, fever, chills, fatigue, including pain, redness and swelling at the injection site with more female preponderance. The adverse effect encountered were higher in number after the first dose of vaccination.
Mesin Carnot Quantum dengan Dua Partikel Tidak Berinteraksi dan Tidak Berdekatan
Authors: Fahmi Khazali
Published: August 2023

In this article, we study the quantum Carnot engine using a one-dimensional infinite well potential model in which two particles are non-interacting, indistinguishable and have the same mass. We find that the efficiency of this model is the same as that of the one-dimensional infinite potential well model in which there is one particle. Moreover, efficiency can be measured only when L_C/L_A≥2, where L_A and L_C are the potential well widths during isothermal and adiabatic expansion, respectively.
Pengaruh Variasi Waktu Pemanasan Sintesis Perak Nitrat (AgNO3) Menggunakan Metode Reduksi Kimia
Authors: Junaidi Junaidi , Rizki Muhammad , Abdul Malik Daffa , Asmi Dwi , Marjunus Roniyus , Karo Karo Pulung
Published: August 2023

Synthesis of silver nitrate using the chemical reduction method with variations in heating time for 1 hour, 2 hours and 3 hours has been successfully carried out. This study aims to determine the effect of variations in heating time on the phase structure, elemental concentration, morphology, and mass percentage of elements. The synthesis process was carried out by heating a mixture of silver and nitric acid at T = 85 °C for 1 hour, 2 hours and 3 hours, then the evaporation process was carried out at T = 125 °C for 10 minutes. The results of the XRF analysis on the AgNO3 samples showed differences in the percentage of Ag concentrations, with the largest percentage of Ag concentrations produced, namely 98.839% at a 2 hour heating time variation, the presence of impurities in the XRF results of AgNO3 samples at a concentration of more than 1%, with a concentration of impurities the largest is copper (Cu), this is what causes the synthesized sample to turn blue. The results of the XRD analysis showed that the AgNO3 phase had an orthorhombic structure with the largest percentage of AgNO3 produced, namely 27.85% at 2 hours of heating time variation.
Real-time Visualisasi Temperatur Pada NTC Sensor Array menggunakan Metode Interpolasi Gaussian berbasis Python
Authors: Joni Joni , Sabar Sabar , Pertiwi Kisna , Ikhsanudin M. , Sinambela Leo
Published: August 2023

Thermal camera technology has been rapidly advancing in the process of remotely measuring temperature. In addition, thermal cameras can also be used to detect gas, water, and other fluid leaks by measuring the temperature changes in the measured object, such as water pipes within walls that cannot be seen directly with the naked eye. However, thermal cameras have limitations in directly measuring dynamic temperature, such as in electric motors mounted on engine blocks. Moreover, there is a need for acquiring data on temperature changes that can be stored and displayed in real-time. The aim of this research is to develop a basic prototype capable of measuring the temperature of the target object and displaying it directly, with the displayed data also being stored in a database. The hardware used for measurements in this study consists of an array of 36 NTC sensors, which are read by the ADC on each ESP-12K microcontroller. The measured data is sent from the microcontroller to the computer via serial communication in the form of voltage values, which are then converted into resistance and temperature values on the computer. For the temperature array visualization process, the author uses Python programming language and the Gaussian Interpolation method.
Identifikasi Sebaran Asap Kebakaran Hutan di Wilayah Jambi dengan Menggunakan Radar C-BAND
Authors: Amiral Faqi Ekky , Nur Cahyo Kholis , Redha Nugraheni Imma
Published: August 2023

Forest and land fires along with the distribution of smoke are one of the disasters threats in the Jambi region which has tropical forests. By knowing the lowest level of visibility from observations, this study was conducted on September 23, 2015. Weather and satellite radar have ability to detect particles and the distribution of smoke from forest and land fires with great spatial and temporal resolution, supported by HIMAWARI-8 satellite data as comparison. C-Band Doppler radar and default strategy scanning are used to identify smoke in Jambi. Wind layer analysis uses CAPPI V products to display smoke distribution and CMAX dBZ with palette changes to identify smoke particles, which then will be carried out vertical cross section to see smoke reflectivity values, identify smoke vertical profiles, and patterns of smoke distribution of forest and land fires. The smoke reflectivity index value can be seen from the dBZ value. The results of the identification show that the smoke material reaches a maximum reflectivity value of 30 dBZ at the centre of the fire point and the minimum value of very fine smoke particles reaches -24.4 dBZ which scattered with the dominant velocity distribution direction to the northwest.
Efektivitas Tungsten sebagai perisai radiasi foton
Authors: Yani Sitti
Published: August 2023

Tungsten is a material that has a high density and atomic number which is a potential candidate for photon shielding. In this study, Tungsten material with a thickness of 10 cm was used as a shield for photon with energies of 2 MeV, 3.3 MeV, and 5 MeV. This material shielding was simulated with Monte Carlo based software, Particle and Heavy Ion Transport System (PHITS). The dimensions of the shield material are 40×40×10 cm3 which are placed at various distances from the source:20 cm, 50 cm, and 100 cm. The results obtained show that these photons with energies of 2, 3.3, and 5 MeV can be attenuated by the shield at all defined source distances. The flux of particles passing through the shield decreases with increasing distance. Therefore, Tungsten material can be a candidate for photon shielding in the medical physics field.
Identifikasi Karakteristik Accumulator Menggunakan Citra Termal Berbasis Pengolahan Citra
Authors: Ratna Sulistiyanti Sri , Arinto Setyawan F.X. , Muthia Tiya , Eka Putra Yudi
Published: August 2023

Batteries are an important part of the power generation system, both solar power plants and motorized vehicle electrical systems. Battery capacity is something that must be considered for these various activities, because a decrease in battery capacity results in disruption of power distribution to users. The battery in this study is a battery or accumulator. The sample image is obtained using a thermal camera to determine the characteristics of the battery based on color. The basis for identifying characteristics is obtained by separating the RGB color components in the thermal image. Each color component will calculate the average pixel intensity value and see the difference in the resulting value. The results showed that the distinguishing characteristic between the sampling conditions was that the green pixel intensity mean value when the battery was being charged was higher than the condition of the battery before being charged and the condition of the battery when it was loaded. The average value when the battery is on the power side is 107 pixels green, while the average value when the battery is before charging is 81 pixels green and when the battery is loaded the average green value is 82 pixels.
Problems of Optimizing Costs to Reduce the Risk of Accidents
Authors:   Mendeleev University of Chemical Technology, Kovalskiy F.S. , Granovskiy E.A. ,   LLC «Center for the Study of Technogenic Risks «Rizikon»,   Russian Chemical Technical University named after D.I. Mendeleev, Akinin N.I. ,   Russian Chemical Technical University named after D.I. Mendeleev
Published: August 2023

With the development of production, the costs of investments in safety are growing, which requires the use of more efficient technologies to reduce risk. It is shown that already in the USSR in the normative legal acts they tried to take into account that safety is both a social and economic problem. The legislation of the Russian Federation implements two approaches to solving the problem of safety based on risk analysis. In accordance with the first approach, the rules are mandatory, but deviation from their requirements is allowed by a Safety Case based on a risk assessment. In the second, the rules are voluntary and the risk analysis is performed in order to justify the sufficiency of the applied safety solutions, as the absence of an unacceptable risk. The basis for comparison when establishing an acceptable risk can be the background risk created by people, the environment, property and other recipients from sources of hazard existing in the region where the hazardous production facility is located, independent of the hazardous production facility under consideration. If the risk, created by sources of hazard independent of the hazardous production facility, is higher than the risk created by the hazardous production facility itself, then further costs for its reduction do not affect the total risk of the recipient. It is shown that in this case, risk reduction decisions can be made in accordance with the ALARP principle. The purpose of applying the ALARP principle, combined with the search for new and better solutions, is to continuously identify best practices as they emerge, to ensure that they become the good practice of tomorrow. The more effective and less costly decisions made can be used to continuously improve safety standards (set of rules). In the process of quantitative risk assessment using the fault tree (FTA) and event tree (ETA), taking into account the cost of the selected safety systems and the expected damage in accordance with the ALARP principle, real optimization dependencies can be built for optimizing safety costs.