bluuebunny/crossref_metadata_2025 huggingface dataset:
A Comparison of Clinical Skill Performance between the Methods of Education
Authors: Kim Min Young , Kim Woo Jeong
Published: May 2022

This study was designed to compare clinical skill performances between the methods of education. In practice of cardiopulmonary resuscitation (CPR) during clerkship of emergency medicine, 50 medical students were randomized to three groups according to the methods of education. 1st groups were educated with video-based lecture, 2nd groups with slide lecture and instructor's demonstration, 3rd groups with practice while watching (PWW) program. After each education, general clinical skill performance was checked by international checklists for CPR and the variables on the accuracy of chest compression were measured by computer program such as skill reporter system. There was no difference between three groups in general clinical skill performance. But, 2nd group educated with slide lecture and instructor's demonstration showed the significant differences in the accuracy of chest compression compared with the other two groups. For more accurate performance of clinical skill, education including instructor's demonstration would be needed.
Anesthetic management of neurofibromatosis type 1 patient
Authors: Ha Su Hyeon , Yun So Hui , Choi Yun Suk , Cho Woo Jin , Park Jong Cook
Published: May 2022

Neurofibromatosis type 1 is an autosomal dominant neurocutaneous disorder. It is multisystemic disorder with multifacetedimplications throughout nearly every organ system. Anesthesiologists must perform a through preoperative evaluation of patient.Moreover the anesthesiologist must consider the possibility of each of the multisystemic complications when evaluating andmanaging the patient for surgical procedures.
Characteristics of Viral Hepatitis in Jeju Island
Authors: Cho Yoo-Kyung , Song Byung-Cheol
Published: May 2022

On Jeju Island, located far from the Korean peninsula, there are different characteristics of viral hepatitis from the mainland.On Jeju Island, the seropositivity of hepatitis B surface antigen (HBsAg) was the highest in Korea (Jeju 5.9%; national average4.0%). To prevent of hepatitis B virus (HBV) vertical transmission, intensive antenatal supervision for HBV infected pregnantwomen, especially HBeAg positive, high viremic mother and scheduled vaccination with hepatitis B immunoglobulin (HBIG) forneonatal baby should be enforced. About hepatitis C virus (HCV), genotype 2a is most common in Jeju, followed by genotype1b. Genotype 2a has been reported 82~96% of sustained virologic response. And treatment for chronic hepatitis C patientsshould be actively considered in Jeju.
Effect of Extract of Citrus Sunki Peel on Gluconeogenesis in H4IIE Hepatoma Cells
Authors: Lee Young-Ki , Park Deok-Bae
Published: May 2022

Peel of Citrus sunki traditionally has a potential anti-inflammatory activity and traditionally has been used to alleviaterespiratory symptoms in Jeju, Korea. However, little is known about the metabolic function of Citrus sunki peel. The presentstudy investigated whether the extract of the fermented Citrus sunki peel might affect glucose production (gluconeogenesis) inH4IIE rat hepatoma cells. When H4IIE cells were incubated in glucose-free medium overnight, concentration of glucose inculture medium were elevated and treatment with ethanol extract of Citrus sunki peel (SE) significantly suppressed the glucoseproduction. Protein levels of phosphoenolpyruvate carboxykinase (PEPCK) were also decreased by treatment with SE.Hesperidine and rutin, flavonoids present in SE, however, failed to suppress the glucose production. Addition of hydrogen peroxidedecreased the viability of H4IIE cells. SE, hesperidin, rutin protected H4IIE cells against the cytotoxicity induced by hydrogenperoxide. In summary, SE can suppress glucose production in glucose-deficient conditions and protect cells against oxidativestress. It should be further studied which compounds are responsible for the gluconeogenic activity of SE.
Analysis of Blood Wastage at an Island Hospital
Authors: Gil So yeon , Kim Sun Hyung , Kim Young Ree , Kang Sung Ha
Published: May 2022

With the blood donor population shrinking as the number of senior citizens rise, the effective use of blood products isbecoming more and more important. In this study, we analyzed the rate and causes of discarded blood components in order tohelp reduce the rate of unnecessary wastage. From January 2010 to June 2013, the number and rate of and reasons fordiscarded blood components at Jeju national university hospital were analyzed using computerized medical records andarchived documents. The number of blood products issued during the period was 49,330 units and the number of discardedblood was 304 units (0.6%). The wastage rate of red blood cell (RBC), fresh frozen plasma (FFP) and platelet (PLT) was 0.2%,1.4% and 0.9%, respectively. The most common cause of discarded RBC was a preparing for operation or procedure. That ofFFP was a death of patient and that of PLT was an improvement in the patient’s condition. The decreasing rate of bloodwastage was recently increased. The wastage rate of FFP was high due to unnecessary excessive order. Because of thegeography of island, PLT and Rh-negative RBCs have been overbooked and so often discarded.
Prevalence and Associatedfactors of Alcohol use Disorder and
Depressive Disorder in Jeju
Authors: Kim Sang-Hee , Kim Moon-doo , Kwak Young-suk , Lee Chang-In , Kang Ji-eon , Song Jeong-Kuk , Park Joon Hyuk
Published: May 2022

We investigated the prevalence and associated factors of alcohol use disorder and depressive disorder and the influence ofthose diseases on quality of life. 507 adults participated in the study. Using the scores of Alcohol Use Disorder IdentificationTest-Korea (AUDIT-K) and the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria, theparticipants were categorized into one of three diagnostic groups: social drinking, harmful drinking and alcohol use disorder.Using scores of Center for Epidemiological Studies-Depression Scale (CES-D) scores, we classified individual scoring 16 to 24as having probable depression and those scoring≥25 as having definite depression. Prevalence of social drinking, harmfuldrinking and alcohol use disorder were estimated to be 72.0%, 22.1%, 5.9%, respectively. Gender, age, educational level,religion and AUDIT-K score were associated with greater risk of alcohol problem. Mental component score (MCS) of alcohol usedisorder was lower than that of social drinking. Prevalence of normal, probable depression, and definite depression wereestimated to be 77.5%, 13.0%, 9.5%, respectively. Religion, job, cohabitants and medical insurance state were associated withgreater risk of depression. Both physical component score (PCS) and mental component score (MCS) were lower in patients withdepressive disorder than normal group. Alcohol use disorder and depressive disorder were very common and may cause poormental and physical health. More attention should be paid to detection and management of alcohol use disorder and depressivedisorder.
Alcohol and Health
Authors: Song Byung-Cheol
Published: May 2022

In general, heavy alcohol consumption increased the risk of liver disease, accident, violence and cancer development in oropharynx, larynx, esophagus, liver, breast and coIorectum. However, many epidemiological studies consistently showed an inverse correlation between moderate alcohol drinking and cardiovascular disease and its related mortality. Therefore, the aim of this article is to review the available data about the association between alcohol drinking and health, thereby, to provide the evidence-based knowledgement to the health professionals.
Expression of Matrix Metalloproteinases and Tissue Inhibitor of Metalloproteinase-1 in Carotid Stenosis
Authors: Maeng Young-Hee , Chang Jee Won , Choi Jay Chol , Kim Su Wan
Published: May 2022

It is still controversial whether the specific subtypes of matrix metalloproteinases are related to clinical characteristics in carotid stenosis patients. Carotid atherosclerotic plaques were obtained from 34 patients, 21 males and 13 females with mean age of 71.1. Carotid endarterectomy was performed under the monitoring of EEG and carotid stump pressure. Expression of matrix metalloproteinase-2, 8, 9, and tissue inhibitor of metalloproteinase-1 in the atherosclerotic plaque was assessed by immunohistochemical slides stained with primary antibodies semi-quantitatively. Twenty patients (58.8%) were symptomatic stenosis and 15 (44.1%) had stable plaques without evidence of fibrous cap rupture. Strong stain (degree 3) of matrix metalloproteinase-2 and 9 was dominant in asymptomatic group (P= 0.026 and P= 0.0007, respectively). Strong stain of matrix metalloproteinase-2 was dominant in stable plaque group (P= 0.026). Specific subtypes of matrix metalloproteinases can be related to clinical characteristics such as symptoms or plaque morphology.
A Case of Clear Cell carcinoma of the Ovary
Authors: Park Jae-hwi , Kim Sung-yob
Published: May 2022

Although Clear cell carcinoma of ovary is a rare epithelial ovarian tumor, prevalence in Asian is higher than other ethnicity. Recently, Clear cell carcinoma has increased in its incidence. Clear cell carcinoma of the ovary constitutes 5-6% all ovarian malignancies. Clear cell carcinoma is frequently present at early stage with unilateral large pelvic mass, deep vein thrombosis, hyper kalemia. Atypical endometriosis is a malignant precursor which associated with clear cell carcinoma 35.9%. Microscopic feature are multiple papillae, densely hyaline basement membrane and hyaline bodies. Mitosis are less frequent than in other types of ovarian carcinomas. Clear cell carcinoma of ovary was known poor prognosis compared to other epithelial ovarian carcinoma because of Platinum based chemotherapy resistance. We experienced a case of clear cell adenocarcinoma of the ovary in 40 years old woman. Clinicopathologic findings of one case with a brief review related literatures are presented.
Establishment of Assay Model for the Trophoblast Cell-line Proliferation
Authors: Shim Soon-Sup
Published: May 2022

Preeclampsia is one of the major causes of pregnancy-related mortality and morbidity. While the pathophysiology is not wellexamined, it is known that impeded early placental formation may be one etiologic step. The cytotoxic effect of lymphocytes onthe trophoblast may be one of immunological explanations. This study was designed to find out the optimal condition of cellconcentration and to establish an experimental model of cytotoxic effect of lymphocytes on the trophoblast cell-line proliferation.In various conditions of cell concentration, the interaction between trophoblast cell-line and lymphocytes were measured byCCK-8 kit, which assesses cell proliferation by absortiometry. The optimal condition (trophoblast cell-line: 105 cells/mL,lymphocyte: 106 cells/mL) was selected for this model. We established a model for assessing the interaction between thetrophoblast cell-line and lymphocytes by measuring the cell proliferation.
Arthroscopic Treatment Versus open Reduction Technique for Fracture
of Greater Tuberosity of Humerus
Authors: Oh Wonsuk , Son In-seok , Kang Hyungseong , Choi Sungwook
Published: May 2022

Purpose of study is to analyze clinical effectiveness by comparing results about arthroscopic treatment versus open reductiontechnique for fracture of greater tuberosity of Humerus. Methods is that from Oct. 2009 to Mar. 2013, 14 patients (group A)who got arthroscopic treatment and 9 patients (group O) who got open reduction technique for fracture of greater tuberosity ofHumerus, all 23 patients, were analyzed retrospectively. Clinical and functional evaluation were fulfilled by final range of motion,Constant score and The university of California at Los angeles(UCLA) score. Bone union was evaluated by radiologic finding. Of23 patients, female were 20 patients and male were 3 patients. Mean age was 62.6(39-81) years. From followed-up group A,Union period was mean 33.5(28-38) days, UCLA score was mean 30.8(28~33) points, forward flexion range was170.7°(150~180°), abduction range was 156.8°(110~180°), constant score was mean 61.0(43~73) points. From followed-upgroup O, Union period was mean 34.4(31~38) days, UCLA score was mean 30.8(28~33) points, forward flexion range was166.1°(150~180°), abduction range was 151.1°(130~180°), constant score was mean 64.7(56~74) points. There was nostatistical difference between the group A and group O.Conclusion is that arthroscopic treatment is effective treatment in aspects of bone union and clinical result comparing openreduction technique for fracture of greater tuberosity of Humerus, Besides, hospitalization period and pain could be reduced byarthroscopic treatment
Granulosa Cell Tumor Presenting with Massive Ascites
: a Case Report and Reviews of the Literature
Authors: Han Jisuk , Kim Misun , Kim Sung‐yob
Published: May 2022

This case of ovarian granulosa cell tumor is characterized by massive ascites and its early recurrence. It aimed for reviewingthe diagnosis and management of granulosa cell tumor from the reported literature. A 13?year?old Asian female waspresented with abdominal distension and massive ascites. Pathologic report was a juvenile granulosa cell tumor of the ovary,FIGO stage 1A. The patient treated with pelviscopic right salpingo?oophorectomy. After eighteen months follow up, recurrencewas detected. Granulosa cell tumors have known diagnostic features on cytology and image studies. However those featureswere not helpful in this case.
Helicobacter pylori Eradication Rate of Quadruple Theraphy in Jeju Island in the Middle of the First Decade of 2000 years
Authors: Kim Heung Up , Na Soo-Young , Boo Seon Jin , Jeong Seung Uk , Song Hyun Joo , Choi Eun Kwang , Cho Yoo-Kyung
Published: May 2022

Background/Aims: On previous study, the H. pylori eradication rate by triple therapy was 68.2 % in Jeju. We perform thisstudy to estimate the eradication rate of quadruple therapy fo rthe treatment failure group of the triple therapy.Methods: From January 1, 2005 to August 31, 2007, We investigated the medical record for adult patient received quadrupletherapy including proton pump inhibitor (PPI), bismuth, tetracycline, metronidazole because of failed OAC triple therapy. Wecollected data and compared the eradication rate for sex, age,p lace of residence, kind of PPI, and treatment periods.Results: Total 105 patient was enrolled (M:F=60:45, Mean age±SD 58.0±12.5). The overall eradication rate was 79.0%. Therewere no significant difference of eradication rate in differen tgroup of sex, place of residence, age, PPI, duration of treatemnt.Conclusions: The H. pylori eradication rate of quadruple therapy was 79.0% in Jeju island. We could not found any significantfactor influencing to quadruple therapy.
DRESS syndrome due to Anti-Tuberculous Drug
Authors: Yoo So Yeon , Lee Jaechun , Lee Jong Hoo , Kim Mi Ok
Published: May 2022

DRESS (Drug Rash with Eosinophilia and Systemic Symptoms) is a potentially life threatening syndrome caused by exposureto certain medications. That may cause skin rash, fever, inflammation of internal organs, lymphadenopathy, and characteristichematologic abdnormalities such ad eosinophilia, thrombocytopenia, and typical atypical lymphocytosis. The interval between thestarting of drug therapy and the onset of cutaneous reactions may be at least one month. Aromatic anticonvulsants(phenytoin, phenobarbital, carbamazepine) and sulfonamides are the most common causes of DRESS. There has been only afew case reports of DRESS syndrome induced by anti-tuberculous medication, Ethambutol, Rifampin, Isoniazid, Pyrazinamide. Wereport a case of Ethambutol induced DRESS syndrome and multiple drug hypersensitivity to other antituberculosis drugs thatwere used at after DRESS syndrome developed.
Age-Related Hearing Loss: Pathophysiology and Recent Researches
Authors: Jung Soo Young , Kim Dong Young , Song Chan Il , Kim Se-Hyung
Published: May 2022

Age-related hearing loss (ARHL), known as presbycusis, is the term encompasses all conditions that lead to hearing loss inelderly people. ARHL is characterized by gradual deterioration of auditory sensitivity, loss of the auditory sensory cells, andcentral processing functions. ARHL is thought to result from age-related degeneration of the cochlea with the cumulative effectsof extrinsic damage. If left untreated, ARHL significantly decreases the autonomy of affected older persons by increasing theirreliance on community or family support. And a loss of hearing can not only lead sufferers to reduce the quality of life but alsoaffect the healthy people around. For most hearing-impaired people, the hearing loss has physical, social and psychologicalconsequences including isolation, depression and dementia. ARHL is becoming a severe social and health problem in thedeveloped countries including the Republic of Korea, therefore, optimal management not only requires early recognition andproper rehabilitation, but it also should be patient-centered and individualized.
Atypical fibroxanthoma: report of a case and review of the literature
Authors: Mun Gawon , Cheon Minseok , Kim Jae-Wang
Published: May 2022

Atypical fibroxanthoma (AFX) is a rare, dermal-based, superficial fibrohistiocytic tumor of the mesenchymal origin. Despite itshistopathological similarity to malignant fibrous histiocytoma, it is generally considered to be a tumor of intermediate malignantpotential. AFX usually presents as a rapidly growing nodule or ulcer and it has a relatively excellent prognosis. However, AFXshould be histopathologically differentiated from many tumors with variable grade of malignancy. Herein, we represent a case ofAFX occurring in a 69-year-old female with a clinico-pathologic review of the literature.
Epidural Anesthesia for Cesarean Section in a Patient with cerebral vascular disease
Authors: Park Byeong Seon , Cho Suk Ju , Park Jong Cook
Published: May 2022

Cerebrovascular disease is relatively rare in women of childbearing age, but women do present for peripartummanagement with a variety of other vascular disorders. Moyamoya disease is a rare progressive occlusive disease of thecircle of Willis and the proximal intracranial vessels. We report the anesthetic management of a 28-year-old femalepatient with moyamoya disease using epidural anesthesia for a cesarean section. Epidural anesthesia was performedusing endtidal carbon dioxide level monitoring in order to avoid hyperventilation that may induce ischemic attacks inmoyamoya patients. The patient was kept stable hemodynamically and there was no postoperative pain, and nopostoperative neurological defects.
Bilateral striopallidodentate calcinosis in a patient with myasthenia gravis
Authors: Shin Ji-Yong , Kang Sa-Yoon
Published: May 2022

Bilateral symmetric calcification involing striatum, pallidum with or without deposit in dentate nucleus is reported fromasymptomatic individuals to a variety of neurological conditions. Clinically it may present with an array of movement disorders,dementia, cerebellar impairment and speech disorder. We report a myasthenia gravis patient with dysarthria which did notrespond to pyridostigmin. Brain MRI showed bilateral striopallidodentate calcinosis (BSPDC). To our knowledge, there is noreported case having anti-acetylcholine receptor antibody and massive intracranial calcifications. This case indicates thatBSPDC may develop in diverse neurological disorders.
What We Should Know For The Evaluation And Management Of Undescended Testis
Authors: Kim Suhyeon , Kim Sung Dae , Park Kyung Kgi , Kim Young-Joo , Huh Jung-Sik
Published: May 2022

Undescended testis or cryptorchidism is one of the most common diseases in pediatric urology field, it is a diseasethat is not fixed in the normal scrotal site. Most of testicles are in normal scrotal site but sometimes they can be foundanother area or cannot be found. The prevalence are 9.2-30.0% in preterm infant, 3.4-5.5% in live birth and 0.8% in 1year, it highly dependent on developmental stage of the fetus. If birth weight of neonate is lower than 2.5Kg, theprevalence will higher. Although testicles are not perceived by touch in physical examination in 20% of these, mostcase of undescended testicle is diagnosed by careful physical examination and corrected by surgery. The otherdiagnostic modalities of cryptorchidism are testicular sonography, testicular scan, angiography, and abdominalexploration. The causes of orchiopexy, is prevention of infertility and cancer, cosmetic aspects. The adequate age oforchiopexy is 6 months of baby.
A Case of Spontaneous Pneumomediastinum in children during swimming
Authors: Hwang In Sun , Yun So Hui , Cho Suk Ju
Published: May 2022

Spontaneous pneumomediastinum(SPM) is relatively rare in children without chest or neck trauma and it is a uncommondisease characterized by the presents of interstitial air in the mediastinum. This is an uncommon complication of exerciseactivity. Herein, we report a case of SPM presented in a 8-year-old male, who complained of chest discomfort and sorethroat after swimming in the ocean.
A case of opsoclonus after upper respiratory infection
Authors: Ko Keun Hyuk , Kang Ji-Hoon , Oh Jung-Hwan
Published: May 2022

Opsoclonus is a type of saccadic intrusion characterized by involuntary, repretitive, and multidirectional conjugate ocularmovements. Opsoclonus may be associated with a variety of etiologies, such as paraneoplastic, parainfectious, or toxic,metabolic conditions. We present the case of a 17-year-old girl with opsoclonus after upper respiratory infection.
Architecture of the License Software Manager using Blockchain technology
Authors:   Lviv Polytechnic National University, Liubinskyi B. B. , Demediuk M. S. ,   Lviv Polytechnic National University, Topylko P. I. ,   Lviv Polytechnic National University
Published: May 2022

The paper considers Blockchain technology and the possibility of its use to prevent software piracy. There is proposed an approach using Blockchain technology. An architecture of the License Software Manager has been developed using Blockchain technology. The software code is available at https://github.com/maksym-demediuk-clicense/clicense.
A new mathematical model for contrast enhancement in digital images
Authors:   Laboratory LAMAI, Faculty of Science and Technology, Cadi Ayyad University, Alaa N. E. , Alaa K. ,   Laboratory of Applied Mathematics and Information Systems, Multidisciplinary Faculty of Nador, University of Mohammed First, Atounti M. ,   Laboratory of Applied Mathematics and Information Systems, Multidisciplinary Faculty of Nador, University of Mohammed First, Aqel F. ,   IR2M Laboratory, Faculty of Sciences and Technics, Hassan First University
Published: May 2022

The aim of this work is to propose a new mathematical model for optimal contrast enhancement of a digital image. The main idea is to combine the Divide-and-Conquer strategy, and a reaction diffusion mathematical model to enhance the contrast, and highlight the information and details of the image, based on a new conception of the Sine-Cosine optimization algorithm. The Divide-and-Conquer technique is a suitable method for contrast enhancement with an efficiency that directly depends on the choice of weights in the decomposition subspaces. Methods: in this paper, a new algorithm has been used for the optimal selection of the weights considering the optimization of the enhancement measure (EME). Results: in order to evaluate the effectiveness of the proposed algorithm, experimental results are presented which show that the proposed hybridization technique is robustly effective and produces clear and high contrast images.
Solving a class of nonlinear delay Fredholm integro-differential equations with convergence analysis
Authors:   Faculty of Mathematical Sciences, Shahrood University of Technology, Shahrood, Iran, Mahmoudi M. , Ghovatmand M. ,   Faculty of Mathematical Sciences, Shahrood University of Technology, Shahrood, Iran, Noori Skandari M. H. ,   Faculty of Mathematical Sciences, Shahrood University of Technology, Shahrood, Iran
Published: May 2022

The main idea proposed in this article is an efficient shifted Legendre pseudospectral method for solving a class of nonlinear delay Fredholm integro-differential equations. In this method, first we transform the problem into an equivalent continuous-time optimization problem and then utilize a shifted pseudospectral method to discrete the problem. By this method, we obtained a nonlinear programming problem. Having solved the last problem, we can obtain an approximate solution for the original delay Fredholm integro-differential equation. Here, the convergence of the method is presented under some mild conditions. Illustrative examples are included to demonstrate the efficiency and applicability of the presented technique.
Investigation of drying the porous wood of a cylindrical shape
Authors:   Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, National Academy of Sciences of Ukraine, Gayvas B. I. , Dmytruk V. A. ,   Lviv Polytechnic National University
Published: May 2022

In the presented study, the mathematical model for drying the porous timber beam of a circular cross-section under the action of a convective-heat nonstationary flow of the drying agent is constructed. When solving the problem, a capillary-porous structure of the beam is described in terms of a quasi-homogeneous medium with effective coefficients, which are chosen so that the solution in a homogeneous medium coincides with the solution in the porous medium. The influence of the porous structure is taken into account by introducing into the Stefan–Maxwell equation the effective binary interaction coefficients. The problem of mutual phase distribution is solved using the principle of local phase equilibrium. The given properties of the material (heat capacity, density, thermal conductivity) are considered to be functions of the porosity of the material as well as densities and heat capacities of body components. The solution is obtained for determining the temperature in the beam at an arbitrary time of drying at any coordinate point of the radius, thermomechanical characteristics of the material, and the parameters of the drying agent.
Mathematical modeling of non-stationary gas flow modes along a linear section of a gas transmission system
Authors:   Department of Applied Mathematics, Kharkiv National University of Radio Electronics, Husarova I. H. , Tevyashev A. D. ,   Department of Applied Mathematics, Kharkiv National University of Radio Electronics, Tevyasheva O. A. ,   Department of Computer Mathematics and Data Analysis, National Technical University “Kharkiv Polytechnic Institute”
Published: May 2022

Article demonstrates the applicability of modeling non-stationary non-isothermal gas flow along a linear section of a gas transmission system by means of using various numerically simulated models and sophisticated numerical techniques. There are described several models of non-stationary non-isothermal regimes of gas flow along the pipeline section. They are included in the considered general model and their comparative analysis is carried out by the virtue of numerical simulation. The finite difference algorithm is used to solve the simultaneous equations of the numerically simulated model for the pipeline section. The results of calculating the gas flow parameters using various models are presented: both with and without taking into account kinetic energy, as well as both with and without taking into account the Joule–Thompson effect. The matter of choosing the appropriate model is discussed. The obtained results can be used at the stage of transfer pipeline system operation in order to develop scientifically well-founded recommendations for improving the safety and efficiency of the pipeline transportation system.
To the kinetic theory of dense gases and liquids. Calculation of quasi-equilibrium particle distribution functions by the method of collective variables
Authors:   Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, Tokarchuk M. V. ,   Lviv, Ukraine Lviv Polytechnic National University
Published: May 2022

Based on a chain of BBGKI equations with a modified boundary condition that takes into account multiparticle correlations, kinetic equations in the approximate "pairs" collisions and in the polarization approximation, taking into account the interaction through the third particle, obtained. The specifics of the model representation of the pair potential of particle interaction through short-range and long-range parts were taken into account. In the case of the short-range potential in the form of the potential of solid spheres, the contribution of Enskog's revised theory to the complete integration of the collision of the kinetic equation is obtained. The collision integrals include paired quasi-equilibrium distribution functions that depend on the nonequilibrium mean values of the particle number density and the inverse temperature. The method of collective variables Yukhnovskii is applied for the calculation of pair quasi-equilibrium distribution function with an allocation of short-range and long-range parts in the potential of the interaction of particles. In this case, the system with short-range interaction is considered as a frame of reference.
Determination of coordinates of unmanned aircrafts by means of kinematic projection
Authors:   Lviv Polytechnic National University, Svidrak I. G. , Aftanaziv I. S. ,   Lviv Polytechnic National University, Shevchuk L. I. ,   Lviv Polytechnic National University, Strogan O. I. ,   Lviv Polytechnic National University
Published: May 2022

A methodology for determining the mechanical trajectory and spatial coordinates of unmanned aircrafts by means of kinematic projection is described. The suggested methodology consists in the formation of two moving independent centers of kinematic projection by launching intercepting drones into space. Electromagnetic radio waves emitted by unmanned aircrafts pierce an unknown flying object and generate two independent projecting rays intersecting at the place of searching a flying object. At that, the instantaneous (at a certain moment) projection of the point of spatial location of the searched object will be located in an imaginary `picture plane' on the line connecting the projections of the points created by projecting rays of the intercepting drones. Since all the objects of projection are mobile in this case, the whole projection of the trajectory of the searched object will be displayed on the operator's monitor. The formation of a `more picture-like plan' perpendicular to the main one will allow us to build an axonometric view not only for the projection, but directly for the aircraft spatial movement trajectory. Every point of this trajectory gives us information about `instant' coordinates of the location of the aircraft in space. Velocity is calculated as the ratio of spatial displacement of a flying object to the duration of movement. The scientific novelty of the method of determining the trajectories, velocities, and coordinates of an unmanned aircraft consists in the combination of radar detection of a moving object with kinematic design used for its implementation in order to calculate instantaneous coordinates of the object. This methodology solves the problem of determining more accurately the coordinates of flying objects that are not clearly and qualitatively displayed on radar monitors due to small size, mass, and specific materials used in manufacture. At the same time, the influence on the accuracy of determining the coordinates of unmanned aircrafts reflected from the fixed obstacles placed on the relief surface of earth was established. The results of this study can be used in practice in military science, for example, during the anti-terrorist operation in the occupied territories of Ukraine, with the aim to detect and neutralize enemy reconnaissance unmanned aircrafts. The use of this method in aerial photography for clear fixation of drone coordinates during aerial surveys for terrain topography is also promising.
Pengaruh Strategi Pembelajaran Inkuiri Dan Tutor Sebaya Terhadap Self Efficacy Dan Penguasaan Konsep Matematis
Authors: Yulianto Dwi
Published: May 2022

Pengaruh Strategi Pembelajaran Terhadap Self Efficacy dan Penguasaan Konsep Matematis Siswa. Tujuan dari penelitian ini adalah untuk mengetahui: 1) Pengaruh strategi pembelajaran terhadap self efficacy dan penguasaan konsep Matematis secara multivariat siswa SMA Swasta di Kabupaten Tangerang. 2) Pengaruh strategi pembelajaran terhadap self efficacy siswa SMA Swasta di Kabupaten Tangerang. 3) Pengaruh strategi pembelajaran terhadap penguasaan konsep Matematis siswa SMA Swasta di Kabupaten Tangerang. Metode penelitian yang digunakan adalah metode eksperimen. Populasi terjangkau pada penelitian ini adalah siswa kelas X pada SMA swasta di Kabupaten Tangerang dengan sampel sebanyak 88 siswa. Eksperimen dilakukan pada dua kelompok/sampel dimana masing-masing kelompok setiap sekolah diberikan perlakuan (treatment) yang berbeda strategi pembelajaran yaitu Inkuiri dan Tutor Sebaya. Setelah selesai eksperimen, masing-masing kelompok perlakuan tersebut diukur self efficacy dan penguasaan konsep Matematis. Jenis pengujian hipotesis yang digunakan adalah Multivariate analysis varian (MANOVA). Setelah selesai eksperimen, masing-masing kelompok perlakuan tersebut diukur sikap ilmiah dan penguasaan konsep Matematis. Hasil penelitian membuktikan bahwa: 1) Terdapat pengaruh yang signifikan strategi pembelajaran terhadap self efficacy dan pemahaman konsep Matematis secara multivariat siswa SMA Swasta di Kabupaten Tangerang. Hal tersebut dibuktikan dengan nilai Sig. 0,000 < 0,05 dan Fhitung = 18,606. 2) Terdapat pengaruh yang signifikan strategi pembelajaran terhadap self efficacy siswa SMA Swasta di Kabupaten Tangerang, hal tersebut dibuktikan oleh nilai Sig. 0,000 < 0,05 dan Fhitung = 21,188. 3) Terdapat pengaruh yang signifikan strategi pembelajaran terhadap penguasaan konsep Matematis siswa SMA Swasta di Kabupaten Tangerang, hal tersebut dibuktikan oleh nilai Sig. 0,000 < 0,05 dan Fhitung = 15,055. Hal ini menunjukkan terdapat perbedaan yang signifikan antara rata-rata self efficacy dan penguasaan konsep Matematis siswa dengan strategi pembelajaran Inkuiri dan Tutor Sebaya. Implikasi dalam penelitian ini adalah jika strategi pembelajaran yang digunakan sesuai, maka self efficacy dan penguasaan konsep Matematis akan mendapatkan hasil yang lebih baik.
Sikap Siswa dalam Belajar Matematika Melalui Model Pembelajaran Learning Cycle 5E
Authors: Sriyanti Ika
Published: May 2022

Tujuan dari penelitian ini adalah untuk mengetahui sikap siswa terhadap penerapan model pembelajaran Learning Cycle 5E. Kurangnya sikap siswa dalam proses  pembelajaran matematika di sekolah SMP Negeri 2 Dawuan sehingga peneliti ingin melakukan suatu penelitian dengan model Pembelajaran Learning Cycle 5E. Sikap adalah suatu tindakan atau tingkah laku sebagai reaksi atau respon terhadap suatu rangsangan atau stimulus, yang disertai suatu pendirian atau perasaan. Sebagai reaksi dalam sikap, maka sikap selalu berhubungan dengan dua alternatif, yaitu senang atau tidak senang, menerima atau menolak, mendekati atau menjauhi dan sebagainya. Maka dari tiap-tiap orang mempunyai sikap yang berbeda-beda terhadap suatu perangsang yang sama. Indikator  sikap yang di gunakan sebagai tolak ukur untuk mengetahui sikap belajar matematika terutama dalam model pembelajaran Learning Cycle 5E. Metode yang di gunakan adalah pendekatan kualitatif. Instrumen dalam penelitian ini yaitu jenis non tes berupa angket. Angket di susun dengan menggunakan skala Likert, dengan tujuan untuk mengetahui setiap indikator  dari sikap siswa dengan mengunakan pembelajaran Learning Cycle 5E. Berdasarkan hasil perhitungan Skalar Likert tiap indikator maka Sikap percaya diri siswa saat pembelajaran matematika memiliki skor rata-rata 3,93, Sikap yang menunjukan minat siswa terhadap pembelajaran matematika memiliki skor rata-rata 4,26, dan untuk indikator Sikap siswa terhadap pembelajaran matematika yang menggunakan model pembelajaran Learning Cycle 5E  memiliki skor rata-rata 3,87. Secara keseluruhan skor rata-rata pada pernyataan positif dan pernyataan negatif untuk seluruh indikator adalah 4,02 yang lebih besar dari 3,00. Hal ini menunjukan sikap positif. Sehingga dapat disimpulkan bahwa Sikap siswa dalam pembelajaran dengan menggunakan model Learning Cycle 5E berjalan dengan  baik. Dalam proses pembelajaran berlangsung  siswa terlibat aktif dikelas. Sehingga secara keseluruhan sikap siswa terhadap pembelajaran yang menggunakan model pembelajaran Learning Cycle 5E bersikap positif.
Meningkatkan Kemampuan Komunikasi Matematis Melalui Strategi
Every One Is A Teacher Here Dengan Pendekatan Metakognitif
Siswa SMA
Authors: Piadi Reky
Published: May 2022

This study investigated the improving of students’ mathematical communication
skill between the ones who has been taught using Every One is a Teacher Here
(ETH) as learning strategy with Metacognitive Approach (PM), with the students
who learned mathematics in their usual learning style, in terms of students’
initial math ability (superior and inferior) as well overall aspects. The method
used in this study was embedded design type of mixed methods. The findings of
this study indicates that 1) The mathematical communication skill of students
who applied Every One is aTeacher Here (ETH) with Metacognitive Approach
(PM) has been improved better than students who applied regular learning (PB)
in terms of Students’ Initial Mathematical Ability Category (superior and
inferior), 2) The mathematical communication skill of students who applied
Every One is a Teacher Here (ETH) with Metacognitive Approach (PM) has been
improved better than students who applied regular learning (PB) in terms of
overall aspects.
Pendekatan Methaporical Thinking Untuk Meningkatkan Kemampuan Penalaran Matematis Siswa Smp
Authors: Malik Rena Fadilah
Published: May 2022

Tujuan penelitian ini adalah untuk mengetahui peningkatan kemampuan penalaran matematis siswa yang belajar melalui pendekatan methaporical thinking dan siswa yang memperoleh pembelajaran konvensional. Selain itu, dikaji juga aktivitas guru dan siswa terhadap pembelajaran dengan pendekatan methaporical thinking. Populasi dalam penelitian ini adalah siswa kelas VIII SMPN 2 Rancaekek dengan sampelnya diambil secara acak dua kelas, satu kelas diberikan perlakuan dengan pembelajaran methaporical thinking dan kelas yang satunya lagi dengan pembelajaran konvensional. Instrumen yang digunakan dalam penelitian ini adalah tes kemampuan penalaran matematis serta lembar observasi aktivitas guru dan siswa. Analisis data menggunakan metode Mixed Method Embedded. Berdasarkan analisis data diperoleh kesimpulan bahwa (1) Peningkatan kemampuan penalaran matematis siswa yang mendapatkan pembelajaran melalui pendekatan metaphorical thinking lebih baik daripada siswa yang mendapat pembelajaran konvensional ditinjau secara keseluruhan; (2) Peningkatan kemampuan penalaran matematis siswa yang mendapatkan pembelajaran melalui pendekatan metaphorical thinking lebih baik daripada siswa yang mendapat pembelajaran konvensional ditinjau secara KAM.
Metode Mood-Understand-Recall-Digest-Expand-Review (Murder) Berbasis E-Learning Untuk Meningkatkan Kemampuan Berpikir Kritis, Pemecahan Masalah Matematis Siswa Serta Sikap Belajar Siswa Kelas VI
Authors: Syaripudin Arip
Published: May 2022

Penelitian ini bertujuan untuk menganalisis pengaruh pembelajaran matematika dengan model pembelajaran mood-understand-recall-digest-expand-review (murder) berbasis e-learning terhadap berpikir kritis, pemecahan masalah matematis siswa serta sikap belajar siswa kelas VI. Metode penelitian yang digunakan dalam penelitian ini adalah penelitian campuran (mixed method) dengan tipe embedded desaign. Populasi dalam penelitian ini adalah seluruh siswa SDIT Al-Irsyad Bandung kelas VI tahun pelajaran 2017/2018. Sedangkan sampel yang diambil dalam penelitian ini yaitu kelas VI A dan VI B. Hasil penelitian menunjukkan bahwa: (1) Peningkatan kemampuan berpikir kritis matematis siswa yang mendapatkan pembelajaran matematika dengan menggunakan metode tipe Mood-Understand-Recall-Digest-Expand-Review (MURDER) berbasis e-learning lebih baik daripada siswa yang menggunakan pembelajaran konvensional; (2)peningkatan kemampuan pemecahan masalah matematis siswa yang mendapatkan pembelajaran matematika dengan menggunakan metode Tipe Mood-Understand-Recall-Digest-Expand-Review (MURDER) berbasis e-learning lebih baik daripada siswa yang menggunakan pembelajaran konvensional; (3)terdapat pengaruh positif sikap belajar terhadap kemampuan berpikir kritis matematis dan kemampuan pemecahan masalah matematis; (4) terdapat hubungan antara kemampuan berpikir kritis matematis, kemampuan pemecahan masalah matematis, dan sikap belajar siswa.
Pembelajaran Matematika Dengan Menggunakan Metode Penemuan Terbimbing Untuk Meningkatkan Kemampuan Penalaran Induktif Siswa SMP
Authors: Septiani Nurul Intan , Solehudin Sutresno
Published: May 2022

This research is motivated by the low inductive reasoning ability of junior high school students. The purpose of this quasi-experimental study is to analyze: 1) whether the increase in the inductive reasoning ability of junior high school students whose learning uses the guided discovery method is better than students who have learned mathematics with expository methods, 2) students' responses to the application of the guided discovery method. Indicators of inductive reasoning ability measured in this study, namely: 1) determining the relationship between patterns for patterns of images or numbers, 2) estimating between those forming these patterns. The population in this study were all eighth grade students of SMP Negeri 44 Bandung. While the sample chosen was not random, but through a purposive technique based on the consideration of researchers and teachers, class VIII H was chosen as the experimental class and class VIII J as the control class. The subject that is used as teaching material is a circle. The instruments used were tests of inductive reasoning abilities, student questionnaires and observation sheets. Based on the analysis of all stages of the research it can be concluded that: 1) the increase in the inductive reasoning ability of junior high school students who obtain learning by using the guided discovery method is better than the increase in the inductive reasoning ability of junior high school students who obtain learning by using the expository method; 2) students give a positive response to learning by using the guided discovery method.
Sistem Presensi Siswa Berbasis Android Menggunakan Pemodelan Zachman Framework
Authors: Widiati Ina Sholihah , Widiyanti Sri
Published: May 2022

Sistem presensi menjadi salah satu hal penting dalam dunia pendidikan khususnya pada proses pengajaran. Pada sebuah Lembaga Ketrampilan dan Pelatihan (LKP), presensi tidak hanya sebagai rekap kehadiran siswa saja, tetapi juga untuk keperluan manajemen lainnya. Sehingga perlu adanya sistem informasi presensi yang mudah digunakan dan dapat mendukung pengambilan keputusan dalam sisi manajemen. Untuk mencapai tujuan tersebut, pada penelitian ini, sistem presensi yang dikembangkan mengacu pada kerangka kerja Zachman (Zachman Framework). Kerangka kerja tersebut memungkinkan pengembangan sistem lebih memperhatikan detail dari 6 perspektif dan 6 fokus komponen. Sistem presensi yang dihasilkan berupa aplikasi android dan web sebagai server. Teknologi yang digunakan untuk membaca data siswa yaitu menggunakan QR Code. QR Code yang ada pada Kartu Siswa akan discan menggunakan fitur scan pada aplikasi android yang dikembangkan untuk melakukan presensi. Administrator dapat mengelola segala data presensi di web. Kesimpulan dari penelitian ini yaitu pengembangan sistem dengan mengacu pada kerangka kerja Zachman, sistem presensi yang dihasilkan sesuai dengan kebutuhan pengguna dengan memperhatikan detail fungsionalitasnya.Kata Kunci – Sistem Presensi, Zachman Framework, Aplikasi Android, QR Code
Application Design of Optical Network Defect Tracking based on Location-Based Service
Authors: Sutrisno Eko Setyo , Hantoro Kusdarnowo
Published: May 2022

To maintain good service quality, network maintenance is needed. Device maintenance must be carried out as quickly and accurately if supported by an application device that can find the right location as fast as possible. Maintenance devises related to defective optical network cables, optical distribution point (ODP) panel, and ODC (Optical Distribution Cabinet) panel, to FTM (Fiber Termination Management) room. Through the three existing locations, maintenance technicians often  difficulties to find the exact location of the ODC and to find out the status of the ports that are in the ODC. By utilizing features on mobile devices. LBS communicates from two-way interactions and can combine three technologies: Geographic Information System, Internet Service, and Mobile Device
Mathematical Modelling of a Laboratory Drying Process: Case Study for Experimental Design Project
Authors: Al Zubaidi Isam
Published: May 2022

The drying process was chosen as a case study for the experimental design project. This design project is related to a heat and mass transfer laboratory for undergraduate students. The drying process was performed at different operating variables such as sample drying temperatures, air velocities, and sample particle size. Many runs were performed for each operating variable and the work was twice repeated for consistency. Each experimental run was continued until no further mass change was observed. The mass of material, wet and dry bulb temperature and air velocity were collected as a function of time. Many mathematical formulas were applied. The kinetics and the model of the drying process were estimated. The heat and mass transfer coefficients were calculated and related to the air temperature, moisture content, velocities, and the size of the sample. It was found that the drying process of wet sand followed the proposed model by Wang and Singh. Many other drying relations were studied as shown in the entire paper. This is a non-ending design project work.
Bilateral Isolated Transverse Facial Cleft Repaired by Straight Line Closure: About Two Cases
Authors: Raherison Aristide R. , Andriamanarivo Lala R. C. , Randriamanantena Tahiry , Razafindrabe John A. B. , Andriamanarivo Mamy L.
Published: May 2022

Transverse facial cleft or congenital macrosomia is a rare facial malformation. It is more common in men than in women. Unilateral form is the most frequent and appears to be associated in most cases with additional facial deformities. Bilateral form is rare and is more often isolated. The cosmetic damage it causes can be source of psychological stress. Sever form can cause oral functional disorders. These consequences justify early repair. We report two cases of isolated bilateral transverse facial cleft in a 6 month old girl and a 5 month old boy. The straight-line technique was used. Mucosal flaps from the lower lip were used to reduce the suture of the labial mucosa to 5 mm from the commissures on the upper lip. The aesthetic and functional outcomes were satisfactory.
Pelatihan Manajemen Stres untuk Menurunkan Stres Pada Santri Pesantren ArRaudhatul Hasanah Medan
Authors: Suryani Sri
Published: May 2022

Tujuan dari penelitian ini adalah untuk mengetahui perbedaan tingkat stres sebelum dan setelah pelatihan manajemen stres pada santri ArRaudlatul Hasanah. Subjek penelitian berjumlah 42 subjek yang terbagi dalam dua kelompok yaitu 21 orang sebagai kelompok eksperimen dan 21 orang sebagai kelompok kontrol. Subjek penelitian merupakan santri kelas 1 Tsanawiyah yang mempunyai stress pada tingkat tinggi. Pengumpulan data dilakukan dengan menggunakan skala stres.Rancangan penelitian yang digunakan adalah pretest-posttest, non equivalent kontrol group design. Analisis penelitian yang digunakan adalah analisis kuantitatif. Analisis kuantitatif dengan uji hipotesis menggunakan analisis uji t-test untuk mengetahui ada tidaknya pengaruh pelatihan manajemen stres dalam menurunkanstres pada kelompok eksperimen. Hasil penelitian yaitu pada pre test dan post test stres menunjukkan bahwa ada perbedaan stres pada kelompok ekperimen dengan nilai t= 8,388, p=0,000, p<0,05. Kesimpulan daripenelitian ini adalah adaperbedaan tingkat stres yang signifikan pada kelompok eksperimen setelahdiberikan pelatihan manajemen stres.