bluuebunny/crossref_metadata_2025 huggingface dataset:
Perfection of a modelling method of cold rolling mill rollers profiling to increase accuracy of rolled strip cross profile forming
Authors: Antonov P. V. , Bolobanova N. L. , Garber E. A.
Published: July 2019

Profiling of rollers, apart from the means of inter-rollers gap control, determines the accuracy of rolled strip cross profile forming and their flatness. A number of articles is devoted to the items of rollers profiling modelling. Based on their study a task of development of strip mill rollers profiling modelling methodology formulated. The methodology based on working rollers generating lines building by geometric summarizing of grinding curves, curves of thermal profile and wear profile curves with elastic deformation curves and further elaboration of a perfected profiling of the 2100 mill roller system to provide the quality world level, characterized by δhпоп index. The elastic deformation curves defined by the finite elements method. Results of modelling of convexconcave CVC profiling of cold rolling mill working rollers quoted. The elaborated and adopted to implementation at the 4-high 2100 mill perfected CVC profiling of working rollers presented, which provides increase of accuracy of rolled strips cross profile forming. The solution based on the mathematical description of quarto roller system loading and deformation, accounting the convex-concave CVC rollers profiling and axes shifting of working rollers. Simulation of loads and elastic deformation of the PAO “Severstal” 4- high cold mill roller system accomplished by application of SIMULIA Abaqus program complex. Accounting symmetry of the task, only one roller half-set considered – the upper working and bearing rollers with CVC profiling. The barrel edge slope taken into consideration in the bearing roller model. Application of the new working rollers profiling will increase the efficiency of their axes shifting and hydro-bending during rolling of 900–1300 mm wide strips, which account the main share of the rolled metal at the mill, with the guaranteed provision of the strip cross crown, not exceeding 2% of the nominal thickness.
Electro-plastic metal cutting
Authors: Troitskii O. A. , Stashenko V. I.
Published: July 2019

In the process of cutting of steels, high strength and heat-resistant alloys a strong warming-up of the cutting instrument takes place, necessitating its cooling by special emulsions and resulting in quick wear and increase of products cost. It was determined by experiment, that during a metal with current cutting, an electro-plastic effect arises. During the lector-plastic cutting, the plastic deformation of a metal under pulse current effect becomes easier, making the friction force between the metal chips and the cutting instrument front edge lower. The electro-plastic metal cutting method accounting the current polarity, current density vector directions, as well as pulse current parameters, can considerably improve the cut surface microstructure and increase the instrument service life. At that, the thermal regime of the cutting can be lowered due to cutting force lowering and heating zone shifting inside the piece or the instrument due to Thomson effect. It was shown, that during the electro-plastic metal cutting the friction force can decrease by 25–30% at the favorable current density vector orientation, as it takes place during electro-static metal drawing and rolling. The current plasticizing action results in decreasing friction force and the chips twisting radius, which can be confluent even for cast iron. At the example of metal drilling with the pulse current, the important current effects on the cutting mechanical parameters revealed. The conditions of metal electro-plastic cutting stated. Results of the experiment study of metal electro-plastic cutting quoted for the processes of steel and cast iron drilling.
Prospects and limits of shared economics principles application at steel industry plants in the context of digitalization
Authors: Pleshchenko V. I.
Published: July 2019

Digitalization of production and economic activity stimulates arising of new organization and economic mechanisms of cooperation interaction of the economy subjects. The plants of steel industry are also involved in the process. In particular, the steel corporations realize projects to implement digital mechanisms of material flows control, creation of production aggregates and processes digital doubles, integration of finance and economic activity control processes. The changes at the goods markets are expressed in the increase of competitive pressure on the goods producers, rationalization the production and economic activity, decreasing material and energy costs, as well as development new forms of cooperation interaction, in particular, economics of shared consumption, which means a collective utilization of various assets. The concept of economics of shared consumption based on application specialized digital platforms. It was successfully proved at the subjects’ interaction (at the level of physical entities) and at present is widely utilized by industrial consumers. The rationalization of consumption, diversification of supply channels, increase of existing assets returns, decrease of things in handling are the positive effects, which can make additional input into financial and economic result of production companies. An adaptation of existing models of shared economics is necessary, which are stipulated by specific goods-exchanging processes in the industry, as well as by peculiarities of consumer behavior of industrial purchasers, including those in the steel industry. For example, application of the shared economics paradigm and correspondent digital infrastructure is not recommended at the raw materials and main technological equipment supply, selling of finished products of steel industry plants, since traditional forms of long-time inter-companies coordination are more acceptable variants, as well as integration and union. At the same time outsourcing of auxiliary processes, horizontal cooperation within the frame of production clusters, as well as collective utilization nonmaterial resources in remote regime, such as joint accumulation and utilization of “big data”, production simulation at “digital plants”, purchase of software licenses, development of virtual prototypes for 3D-printing.
APPLYING RISK PROFILE, GOOD CORPORATE GOVERNANCE, EARNING AND CAPITAL (RGEC) METHOD TO PREDICT THE BANK HEALTH (CASE STUDY ON PT. BANK TABUNGAN NEGARA)
Authors: Zainuddin Zainuddin , Djaelani Yustiana
Published: July 2019

This study aimed to analyze the health of PT. Bank Tabungan Negara (Persero) Tbk over period of 2013 to 2017 RGEC method approach (Risk Profile, Good Corporate Governance, Earnings, Capital). This research is quantitative descriptive method. The variables in this study include Risk Profile using the ratio of Non Performing Loans (NPLs) and loan to Deposits Ratio (LDR), GCG using Composite Rating GCG, Earnings use ratios Return on Assets (ROA) and Net Interest Margin (NIM) and Last Capital uses Adequacy Capital ratio (CAR). The results showed Bank BTN predicate healthy enough where banks are still quite capable of carrying out risk-based banking management well, so they deserve to be trusted community. However, the calculation of the proportion of Loan to Deposits Ratio (LDR) is below standard bank of Indonesia with the predicate less healthy.
PENGARUH KUALITAS PELAYANAN, HARGA DAN FASILITAS YANG DIBERIKAN KENARI WATERPARK BONTANG TERHADAP TINGKAT KEPUASAN PELANGGAN
Authors: Irfan Andi Muhammad
Published: July 2019

Tujuan penelitian ini adalah untuk mengetahui pengaruh 3 variabel independen tersebut terhadap kepuasan pelanggan. Penelitian ini dilakukan dengan kuesioner yang menggunakan metode analisis linear berganda terhadap 100 responden yaitu pengunjung kenari waterpark. Analisis terhadap data yang diperoleh berupa analisis kuantitatif dan kualitatif. Analisis kuantitatif meliputi uji validitas dan reliabilitas, uji asumsi klasik, analisis regresi berganda, uji f, uji t serta analisis koefisien regresi (R2). Analisis kualitatif merupakan interpretasi data yang diperoleh dalam penelitian serta hasil pengolahan data yang sudah dilaksanakan dengan memberi keterangan-keterangan dan penjelasan-penjelasan. Hasil dari penelitian ini adalah secara parsial variabel kualitas pelayanan dan fasilitas berpengaruh singnifikan terhadap tingkat kepuasan pelanggan namun variabel harga tidak berpengaruh signifikan , secara simultan variabel kualitas pelayanan, harga dan fasilitas memiliki pengaruh yang signifikan terhadap kepuasan pelanggan kenari water park Bontang dengan nilai probabilitas signifikansi sebesar 0,000.
PROSTHETIC REHABILITATION OF DENTULOUS HEMIMANDIBULECTOMY PATIENT - A CLINICAL CASE REPORT
Authors: Daniel Dr. Angleena Y. , Vinod Dr. B
Published: July 2019

The deformity associated with maxillofacial defects causes more of a psychological imbalance than the actual structural and functional loss. Mandible is the only bone that supports the lower face and aids in performing oral functions. Maxillofacial defects that interrupt the continuity of the mandible results in mandibular deviation and rotation which are evident esthetically as well as occlusally. The prime aims of prosthetic rehabilitation are to restore the patient with improved esthetics and acceptable occlusion. These aims   are related to the extent of the mandibular resection, the amount of soft tissue loss, and presence or absence of natural teeth. Mandibular discontinuity defects that are immediately restored with grafts have better prognosis as the continuity of mandible is retained. Maxillofacial prosthesis  that can camouflage these defects to restore the facial symmetry,   normal appearance   and   an acceptable occlusion, can not only boost the patient’s morale and assist in bringing them back to the society but also aid in performing their functions more efficiently . This clinical case report describes the prosthetic rehabilitation with a cast partial denture for a patient who underwent a hemimandibulectomy and reconstruction with bone (rib) graft.

Key words: Hemimandibulectomy, Prosthetic rehabilitation, Amoeloblastoma, Cast Partial denture.
ASSOCIATION OF LIPID PROFILE WITH BODY MASS INDEX IN GALL STONE DISEASE
Authors: Shirke Dr. Pravin , Nagtilak Dr. Suryakant
Published: July 2019

Introduction: Gall stone disease is common in northern regions of India including Uttarakhand. It is traditionally seen in fat, fertile, female of fourty. Apart from this, age, obesity, hyperlipidemia, smoking & diabetes are other risk factors. Gall stones show more association with elevated levels of triglyceride and low high density lipoprotein (HDL-C) where less association with total cholesterol and low density lipoprotein (LDL-C). Increased prevalence of gall stone reported in overweight. This present study conducted with an aim to find out the co-relation of lipid profile, BMI (body mass index) and gall stones in Uttarakhand population attending Shridev Suman Subharti Medical College Teaching Hospital, Dehradun.

Material & Methods: Total 120 patients (10 M, 110 F) were included in the study following confirmation of diagnosis of gall stones on ultrasound. Age, sex, dietary habits, occupation, medical history and drug history of each patient were recorded in predesigned, tested proforma. The BMI calculated as weight in Kg/height in meter square. BMI of 18 to 24.9 were regarded as normal, whereas, 25 to 29.9 as overweight, 30 to 39.9 as obese and above 40 as morbid obese. The serum cholesterol, LDL, HDL and Triglyceride were estimated on a fasting sample by keeping patient nil orally for 12hrs after their normal meal.

Results: Out of total 120 patients, 110(91.67%) were female & 10(8.33%) were male, with female to male ratio 9:1. The age-group of 21 to 40 years was the most common, with 64(53.33%) patients belonging to this group. Triglyceride was raised in 35(29.17%) patients, total cholesterol was raised in 7(5.83%) patients and LDL was raised in 5(4.17%) patients. The cholesterol was lowered in 13(10.83%) patients, HDL was lowered in 8(6.66%) patients and triglyceride was lowered in 3(2.5%) patients. Triglyceride & LDL were raised in 4(3.3%) patients, cholesterol and triglyceride were raised in 3(2.5%) patients and cholesterol and HDL were lowered in 4 (3.33%) patients. Patients with BMI of 18.0-24.9 were 72(60.00%), BMI of 25-29.9 were 36(30.00%) and BMI of 30-39.9 were 9(7.50%) respectively.

Conclusion: The present study on presence of Gall stones which are more commonly found in females aged 21 to 40 years. Raised levels of Triglyceride and lower levels of cholesterol are associated with gall stones. There is no association between Increased BMI & presence of gall stones. BMI is associated with higher level of   Triglyceride.

Key Words: Gall stone, BMI, Triglyceride, Cholesterol, and HDL-C.
NADI SHODHANA PRANAYAMA AND ITS IMPACT ON PARAMETERS OF CARDIOVASCULAR, PULMONARY, AND BRAIN FUNCTIONS
Authors: Vaksh Dr. Shreyasi , Pandey Dr. Mukesh
Published: July 2019

Background: Practice of pranayama has been recognized to control cardiac autonomic status with an improvement in cardio-respiratory functions.

Objective: To determine impact of Nadi-shodana pranayama practice for 20 minutes on heart rate, systolic and diastolic blood pressure, peak expiratory flow rate.

Methods: Ninety normal healthy subjects aged between 17-20 years of first year MBBS course volunteered for this study out of total 150. Among them 40 were females and 50 were males. They did not have any previous training in Pranayama. All the selected physiological parameters were measured before and after performing ‘Nadi-shodhana Pranayama’. Epi-info 7 was used for analysis.

Results: Following nadi-shodhana pranayama a significant decline in basal heart rate and systolic blood pressure was observed. Peak expiratory flow rate was significantly improved (P<0.01). No significant changes in respiratory and other cardiovascular parameters were seen.

Conclusion: Nadi-shodhana Pranayama swiftly alters cardiopulmonary response. Further studies on a larger sample size need to illustrate the underlying mechanisms involved in this alteration.

Keywords: Nadi-shodhana pranayama, heart rate, blood pressure, peak expiratory flow rate.
COMPARISON OF ESMOLOL, LABETALOL AND LIGNOCAINE FOR ATTENUATION OF SYMPATHOMIMETIC RESPONSES TO LARYNGOSCOPY AND ENDOTRACHEAL INTUBATION
Authors: Kirankumar Dr. H.
Published: July 2019

INTRODUCTION: In some individual’s suffering from hypertension, coronary artery disease, cerebrovascular disease, myocardial infarction and thyrotoxicosis, these hemodynamic stress responses can turn into life-threatening conditions like left ventricular failure, myocardial ischemia, cerebral hemorrhage, and ruptured cerebral aneurysm. Different drugs like lidocaine, vasodilator agents inhibiting sympathoadrenal response, α-and β-adrenergic blockers, and opioids can be administered prior to tracheal intubation to prevent hemodynamic responses. But higher dose of lignocaine may lead to hypotension, bradycardia, and hypoxia in patients. Due to various effect of these drugs on hemodynamic changes in patients this study was carried out to evaluate the effects of IV esmolol, lignocaine, and labetalol for attenuation of hemodynamic response to laryngoscopy and intubation.

MATERIAL AND METHODS: A total of 90 consecutive patients were included in the study and were grouped in to, lignocaine group, labetalol and esmolol group containing 30 patients each. Age group 21–65 years of either sex or American Society of Anesthesiologists (ASA) Grade I or II scheduled for various general surgical procedures under endotracheal anesthesia were included in this study. Patients excluded were pregnant and lactating women, morbid obesity, and hypertension.

RESULTS: Mean Age in Group 1, group2 and group 3 was 40.38 ± 7.25, 43.8 ± 9.24 and 42.56 ± 8.71 respectively while weight was 62.41 ± 7.32, 63.63 ± 8.11 and 60.74 ± 6.92 respectively. There were 17 male and 13 female in group 1, 19 male and 11 female in group 2 and 16 male and 14 female in group 3. Attenuation of blood pressure was more in labetalol group. Reduction of heart rate in labetalol group was significant. It is seen that Labetalol was more effective at attenuation of diastolic blood pressure among all drugs. Mean arterial pressure was not much reduced lignocaine and esmolol group as compared to labetalol.

CONCLUSION: Haemodynamic alterations are usually observed during laryngoscopy and endotracheal intubation. In our study it was found that as labetalol is a safe and effective drug, for attenuation of sympathomimetic response.
RETROSPECTIVE ANALYSIS OF MULTIPLE MYELOMA PATIENTS IN A TERTIARY CARE CENTRE OF UTTARAKHAND
Authors: Shukla Sushil Kumar , Shrivastava Vikas , Kala Mansi , Das Kunal , Kusum Anuradha
Published: July 2019

Introduction: Multiple myeloma (MM) is a hemato-lymphoid malignancy of B-cell type. It occurs due to the accumulation of malignant monoclonal plasma cells. The exact incidence of MM in India is not well-known. The current study presented the clinical characteristics, radiological findings and laboratory findings of MM patients who were initially treated at the tertiary care centre, Dehradun, Uttarakhand (India).

Material and methods: Retrospective analysis of the medical records of 123 consecutive patients with MM who were initially presented to Hemato-Oncology department during the period from January 2014 to December 2018.  Peripheral blood finding, bone marrow diagnosis, flow-cytometry analysis, serum protein and immunofixation electrophoresis finding, biochemical parameter, histo-pathological and cytological diagnosis, if any, urine examination finding and radiological examination of cases shall be compiled and tabulated. Diagnosis of symptomatic multiple myeloma was done based on The International Myeloma Working Group criteria for the diagnosis of MM.

Result: The study included 123 cases of multiple myeloma with male: female ratio of 2:1, mean age of 59.88 ±11.08 years and range of 32-87 years. The back pain (n=106, 86.2%) was the common presenting complaint followed by inability to walk (n=90,73.2%). CT scan and/or MRI scan finding of MM patients, the lytic lesion was found in 107 patients (87%) and was found significant with its correlation with ISS/DS plus staging system (pvalue 0.013). The most location was dorso-lumbar spine (n=72, 67.28%) followed by skull (n=37, 34.58%) and ribs (n=19, 17.75%). Hemoglobin (Hb) analysis showed 92.7 % (n=114) cases were anemic with mostly had normocytic (n=95,77.2%). 62.6%(n=77) of cases showed rouleaux formation while 23.57% (n=29) cases were circulating plasmacytoid lymphocytes or plasma cells. The raised ESR values was found in 89.33% (n=67) of cases. Diagnosis of cases shows 99.2% (n=122) of cases diagnosed as secretory MM while 1 (0.8%) case diagnosed as non-secretory MM.

 Conclusion: MM is a disease with a inconsistent clinical presentation with multiple system involvement. Younger age of disease onset is some noteworthy features of myeloma in Uttarakhand state of India. Bony pain associated with generalized weakness is the commonest presentation, normocytic normochromic anemia with rouleaux formation, raised ESR, raised total protein with hypoalbuminemia, hypercalcemia, presence of M band and presence of >10% plasma cell in bone marrow is clue to diagnosis in MM cases .

 Keywords: Multiple Myeloma, Uttrakhand, Hemato-lymphoid malignancy
The Genetic Diversity and Structure of Linkage Disequilibrium of the MTHFR Gene in Populations of Northern Eurasia
Authors: Trifonova E. A. , Eremina E. R. , Urnov F. D. , Stepanov V. A.
Published: July 2019

The structure of the haplotypes and linkage disequilibrium (LD) of the methylenetetrahydrofolate reductase gene (MTHFR) in 9 population groups from Northern Eurasia and populations of the international HapMap project was investigated in the present study. The data suggest that the architecture of LD in the human genome is largely determined by the evolutionary history of populations; however, the results of phylogenetic and haplotype analyses seems to suggest that in fact there may be a common old mechanism for the formation of certain patterns of LD. Variability in the structure of LD and the level of diversity of MTHFR haplotypes cause a certain set of tagSNPs with an established prognostic significance for each population. In our opinion, the results obtained in the present study are of considerable interest for understanding multiple genetic phenomena: namely, the association of interpopulation differences in the patterns of LD with structures possessing a genetic susceptibility to complex diseases, and the functional significance of the pleiotropic MTHFR gene effect. Summarizing the results of this study, a conclusion can be made that the genetic variability analysis with emphasis on the structure of LD in human populations is a powerful tool that can make a significant contribution to such areas of biomedical science as human evolutionary biology, functional genomics, genetics of complex diseases, and pharmacogenomics.
Study on carburized steel used in maritime industry: The influences of carburizing temperature
Authors: Chowwanonthapunya Thee , Mu Xin , Peeratatsuwan Chaiyawat
Published: July 2019

This paper aims to examine the influence of carburizing temperature on carburized mild steel. Carburizing treatment was carried out at carburizing temperatures of 800 and 900 °C with fixed carburizing time of 1 h. The results indicated that carburization treatment could improve the hardness of the samples. However, it was found that the hardness profile of mild steel was almost unchanged after treatment at the carburizing temperature of 800 °C. Carburization treatment carried out at the carburizing temperature of 900 °C could significantly enhance the hardness conditions and also increase the case depth of carburized mild steel. Carburized steel can provide a tough and durable surface to protect against severe degradations, such as marine erosion, wear, and cavitation in maritime applications.
The Dynamics of Education on the Development of an Intellectual Citizenry in Africa
Authors: Dzvimbo Munyaradzi A.
Published: July 2019

This article explores the importance of education and schooling precisely, as the catalyst for the development and transformation of citizens within, the African context. Historically, intellectual and citizenship education has always been seen as a western concept within the African continent. Hence, this exacerbated the myopic view that intellectual education is new as its approach in schools is often western oriented. Drawing from post-colonial theory, this study opines that though education and learning in particular have played a pivotal role in the enhancement and transformation of citizens in Africa as a whole during the post-independence era, citizenship education is not a new concept. Further, I expound and interrogate the African governments’ efforts and initiatives in fostering citizenship through learning. More so, this study points out that if we do move beyond any labelling essentialities, intellectualism has always been part and parcel of the nucleus of education among these nations and schools have also served as catalyst of social change. This is clearly reflected in various tasks and projects found in educational policies and frameworks which include enhancing the provision and access to education, language policies, indigenous knowledge systems and the indigenisation of the school curriculum  to enable it to be relevant to the current national ideals and vision. Conclusively, these programmes and initiatives were obviously implemented towards citizenship development aimed at empowering pupils with specific kind of education ideal for intellectual and national development within the countries of the Global South. Thus, the paper opines that the teaching of new learning areas through heritage studies in secondary schools, national and strategic studies in tertiary institutions should further be reconceptualised to reflect the local context and their ways of understanding and deconstructing the colonial narratives and mind set.
Planting Base Value of Hardworking Character Education through Ulid Novel
Authors: Septiadi Hidayat Nur , Andayani Andayani , Wardani Nugraheni Eko
Published: July 2019

Important hard work characters are taught for the younger generation today so that researchers are interested in describing and explaining the values of character education in hard work in Ulid's novel by Mahfud Ikhwan. This novel tells the story of the struggle of poor families to send their eldest children from kindergarten to high school with various struggles and hard work in his life. The actions that the characters to bring out the character values of hard work that are proven through the attitude and every dialogue of the characters. This study included descriptive qualitative with note-taking techniques and literature studies. The results of data analysis of hard work character values are known to 9 frequencies, including unyielding characters, passionate characters, active working characters, earnest characters, the full character of confidence in acting, the full character of the struggle for life, independent practice character, cooperative character, and characters fight together.
Analysis of Elementary School Teachers' Ability in Using ICT Media and Its Impact on the Interest to Learn of Students in Banda Aceh
Authors: Yusrizal Yusrizal , Hajar Ibnu , Tanjung Samsidar
Published: July 2019

This study aims to determine: 1) Primary School Teachers' Ability in utilizing ICT-based learning media in Banda Aceh City; and 2) Differences in the average of students interest in learning taught by high, medium and low competence teachers in utilizing ICT-based learning media.This research is conducted in Banda Aceh City. The population in this study are public elementary schools equipped with wifi and at least B accredited consisting of 42 schools. The research method used is a quantitative method with a comparative type. Data collection techniques ae carried out by observation techniques, and questionnaires. The data analysis technique in this study uses one-way ANAVA. The results of the study show that: (1) The ability of elementary school teachers to utilize ICT-based learning media in Banda Aceh is in the medium category. (total score = 170.22, this is in the range 140 ≤ X <220); and (2) There is a significant difference between the average of students interest in learning taught by high, medium and low competence teachers in utilizing ICT-based learning media. (F count = 40,205 with sig. = 0,000 <0,05).
The Effect of Group Counseling (BKP) And Self-Efficiency on Improving Students' Social Skills in Junior High School 2 Tanjung Tiram
Authors: Munir Abdul
Published: July 2019

The aim of this study is to determine the effect of group counseling (BKP) on students' social skills. Knowing the effect of self-efficacy on students' social skills. Knowing the interaction between BKP and self-efficacy towards students' social skills. This study is a quasi-experimental study with factorial 2x2 design. The subjects of this study is 8th grade student of Junior High School 2 Tanjung Tiram which amounted 43 students consisting of two class groups, where the first class as an experimental class was applied to BKP Modeling and the second class as a control class was applied to BKP Homeroom. The instrument used in this study is a questionnaire that is declared valid and reliable. Data are analyzed using two-way ANAVA analysis. From the results of the study it can be concluded that there is an effect of group counseling (BKP) on the social skills of students in Junior High School 2 Tanjung Tiram. There is a difference between BKP Modeling and BKP Homeroom in affecting students' social skills. There is no difference between low self-efficacy and high self-efficacy in affecting students' social skills. BKP Modeling is very good to use in improving students' social skills.
The Effects of Learning Models of Discovery Learning and Learning Interest on Social Science Learning Outcomes in Grade VII of Junior High School of Al-Azhar Medan
Authors: Irawan Andi , Ruslan Dede , Simare mare Aman
Published: July 2019

This study deals with the effects of learning models of discovery learning and learning interest on social science learning outcomes in grade VII of Junior High School of Al-Azhar Medan. This study was conducted in the Even Semester of the Learning Year 2018/2019, which began in April to May 2019 with stages: observation, determining the experimental class and the control class, preparation of research instruments, instrument testing, pre-test administration, giving questionnaires of interest, treatment, giving post-tests, processing data, analyzing data, drawing conclusions. The conclusion of this study were there is a significant effects of learning models of discovery learning on social science learning outcomes in grade VII of Junior High School of Al-Azhar Medan (Fcount = 306,594; P = 0,000). There is a significant effects of learning interest in social science learning outcomes in grade VII of Junior High School of Al-Azhar Medan (Fcount 69,071; P = 0,000). There is a significant interaction between Discovery Learning models and learning interest in social science learning outcomes in grade VII of Junior High School of Al-Azhar Medan (Fcount = 5,288; P = 0,012).
PENGEMBANGAN BUKU PENUNTUN PRAKTIKUM IPA SD BERBASIS KETERAMPILAN PROSES SAINS PADA MATA KULIAH PRAKTIKUM IPA SD UNTUK MAHASISWA PENDIDIKAN GURU SEKOLAH DASAR (PGSD)
Authors: Dewi Tisrin Maulina
Published: July 2019

Buku Penuntun Praktikum IPA SD Berbasis Keterampilan Proses Sains masih sangat dibutuhkan oleh Mahasiswa PGSD sebagai panduan dalam pelaksanaan praktikum. Penelitian ini bertujuan untuk mengetahui tingkat kelayakan buku penuntun Praktikum IPA SD berbasis keterampilan proses sains untuk mahasiswa PGSD. Jenis penelitian ini adalah penelitian pengembangan dengan model pengembangan produk Borg dan Gall, yang dimodifikasi sesuai kebutuhan. Subjek uji coba terdiri dari tim ahli materi, ahli desain, 1 dosen pengampu mata kuliah, 3 mahasiswa PGSD pada uji coba perorangan, 6 mahasiswa PGSD pada uji coba kelompok kecil dan 15 mahasiswa PGSD pada uji coba kelompok lapangan terbatas. Data tentang kualitas produk pengembangan ini dikumpulkan dengan angket. Hasil penelitian menunjukkan bahwa: (1) Validasi tim ahli materi berada pada kriteria “sangat baik” (84%); (2) Validasi tim ahli desain berada pada kriteria “baik” (78%); (3) Penilaian dosen pengampu mata kuliah berada pada kriteria “sangat baik” (84%); (4) Respon mahasiswa berada pada kriteria “sangat baik” dengan nilai persentase sebesar 83%, sehingga dapat disimpulkan bahwa produk pengembangan penelitian buku penuntun praktikum IPA SD berbasis keterampilan proses sains yang dikembangkan ini layak untuk digunakan sebagai bahan ajar oleh dosen dan mahasiswa Pendidikan Guru Sekolah Dasar (PGSD).
Uji Kelayakan Teh Herbal Kulit Batang Tali Kuning (Arcangelsia flava (L.) Merr)
Authors: Futwembun Alowisya , Yabansabra Yuliana Rut , Nurhairi Nurhairi , Sitokdana Desinta O
Published: July 2019

Teh adalah minuman yang mengandung kafein, sebuah infusi yang dibuat dengan cara menyeduh daun, pucuk daun, atau tangkai daun yang dikeringkan dari tanaman Camellia sinensis dengan air panas. Teh Herbal adalah sebutan racikan bunga, daun, biji, akar, atau buah kering untuk membuat minuman yang juga disebut teh herbal. Penelitian ini bertujuan untuk mengetahui kelayakan ekstrak kulit batang tali (akar) kuning (A.flava.Merr) sebagai teh herbal. Hasil yang didapatkan dari penelitian ini yaitu : kadar air 0,24 %, kadar ekstrak dalam air 42,38 %, kadar serat kasar 1,04 %, kadar abu larut dalam air dari abu total 3,37 %, kadar alkalinitas abu larut dalam air (sebagai KOH) %, kadar abu total 1,78 %, kadar abu tak larut dalam asam 0,01 % dan juga terdapat senyawa metabolit sekunder seperti: tanin, saponin dan flavanoid yang berguna dan bermanfaat bagi tumbuhan dan manusia. Uji kualitatif tersebut telah menghasilkan delapan parameter yang sesuai dengan SNI 3836:2013 Teh Kering dalam Kemasan.
STATUS KONSERVASI BURUNG PADA RESORT COBAN TRISULA DAN BLOK IRENG-IRENG, TAMAN NASIONAL BROMO TENGGER SEMERU
Authors: Herdiawan Boni , Mubarrok Muhammad Musthofa , Ambarwati Reni , Prasetya Koestriadi Nugra
Published: July 2019

Taman Nasional Bromo Tengger Semeru merupakan salah satu kawasan konservasi di Jawa Timur. Taman Nasional Bromo Tengger Semeru merupakan kawasan dengan keragaman hayati yang tinggi, salah satunya adalah burung. Resort Coban Trisula dan Blok Ireng-Ireng diketahui merupakan kawasan dengan keragaman burung yang tinggi di Taman Nasional Bromo Tengger Semeru. Penelitian ini bertujuan untuk mengidentifikasi status konservasi burung di Resort Coban Trisula dan Blok Ireng-Ireng, Taman Nasional Bromo Tengger Semeru. Penelitian ini menggunakan metode pendekatan birdwatching dengan mengacu pada IUCN Red List, CITES Appendix, Peraturan Pemerintah Nomor 7 Tahun 1999 dan Peraturan Menteri LHK Nomor 106 Tahun 2018 sebagai database status konservasi burung yang teridentifikasi. Hasil penelitian menunjukkan bahwa dari 62 jenis yang terobservasi di kawasan Resort Coban Trisula dan Blok Ireng-Ireng, terdapat 16 jenis yang memiliki status konservasi diatas Least Concern menurut IUCN, CITES dan Peraturan Menteri LHK Nomor 106 Tahun 2018. Adanya burung-burung yang dilindungi dan memiliki status konservasi yang penting menguatkan peran kawasan Taman Nasional Bromo Tengger Semeru sebagai kawasan konservasi. Terdapat tujuh jenis burung di atas status Least Concern menurut IUCN yaitu tiga jenis berstatus Near Threatened, tiga jenis berstatus Vulnurable, dan satu jenis berstatus Endangered. Delapan jenis yang masuk pada CITES Appendix dengan rincian satu jenis tergolong Appendix I dan tujuh jenis tergolong Appendix II. 15 jenis dilindungi oleh Peraturan Menteri LHK Nomor 106 Tahun 2018.
Isolasi, Identifikasi, Dan Uji Antibakteri Kitosan Cangkang Bekicot (Achatina fulica) Terhadap Staphylococcus aureus dari Penderita Ulkus Diabetikum
Authors: Umarudin Umarudin , Surahmaida Surahmaida
Published: July 2019

Salah satu bakteri penyebab ulkus diabetikum adalah Staphylococcus aureus. Pengunaan antibiotik yang tidak tepat menyebabkan munculnya S. aureus yang resisten terhadap antibiotik atau bertahan hidup karena adanya perubahan genetic. Bahan alam yang memiliki sifat sebagai antibakteri adalah kitosan cangkang bekicot.Penelitian ini bertujuan untuk melakukan isolasi dan uji antibakteri kitosan cangkang bekicot terhadap Staphylococcus aureus dari penderita ulkus diabetikum dan juga dilakukan uji sensitifitas S. aureus terhadap kitosan cangkang bekicot. Pada penelitian inidilakukan secara true eksperimental. S. aureus diisolasi dari penderita ulkus diabetikum dan diidentifikasi berdasarkan sifat biakan, pewarnaan Gram, uji biokimiawi dan uji gula-gula. Isolat selanjutnya diuji sensitifitasnya terhadap kitosan cangkang bekicot. Hasil penelitian menunjukkan bahwa isolasi bakteri yang tumbuh dan dapat memfermentasi plat mannitol salt agar, sel berbentuk bulat bergerombol, bersifat Gram +, memfermentasi maltosa dan laktosa, mengkoagulasi plasma kelinci dan bereaksi positif terhadap uji clumping faktor dan Voges Proskouer. Pada penelitian ini, hasil uji terhadap kitosan cangkang bekicot pada kosentrasi 300-700 ppm adalah sensitif. Penelitian ini dapat disimpulkan bahwa penderita ulkus diabetikum yang diidentifikasi adalah Staphylococcus aureus. Isolat S. aureus sebagian besar sensitif terhadap kitosan cangkang bekicot (Achatina fulica).
Ghazals, Bhajans and Hymns: Hindustani Christian Music in Nineteenth-Century North India
Authors: Guenther Alan M.
Published: July 2019

When American missionaries from the Methodist Episcopal Church arrived in India in the middle of the nineteenth century, they very soon published hymn-books to aid the Christian church in worship. But these publications were not solely the product of American Methodists nor simply the collection of foreign songs and music translated into Urdu. Rather, successive editions demonstrate the increasing participation of both foreigners and Indians, of missionaries from various denominations, of both men and women, and of even those not yet baptised as Christians. The tunes and poetry included were in both European and Indian forms. This hybrid nature is particularly apparent by the end of the century when the Methodist press published a hymn-book containing ghazals and bhajans in addition to hymns and Sunday school songs. The inclusion of a separate section of ghazals was evidence of the influence of the Muslim culture on the worship of Christians in North India. This mixing of cultures was an essential characteristic of the hymnody produced by the emerging church in the region and was used in both evangelism and worship. Indian and foreign evangelists relied on indigenous music to draw hearers and to communicate the Christian gospel.
From Missionary Translation to Local Theological Inquiry: A Narrative History of the Lisu Bible
Authors: Arrington Aminta
Published: July 2019

The Lisu are a largely Christian minority group in south-west China who, as an oral culture, express their faith more through a set of Christian practices done as a group and less through bible reading as individuals. Even so, the Lisu practice of Christianity specifically, and Lisu culture more generally, was profoundly impacted by the written scriptures. During the initial evangelisation of the Lisu by the China Inland Mission, missionaries created a written script for the Lisu language. Churches were constructed and organised, which led to the creation of bible schools and the work of bible translation. In the waves of government persecution after 1949, Lisu New Testaments were hidden away up in the mountains by Lisu Christians. After 1980, the Lisu reclaimed their faith by listening to the village elders tell the Old Story around the fires and reopening the churches that had been closed for twenty-two years. And they reclaimed their bible by retrieving the scriptures from the hills and copying them in the evening by the light of a torch.

The Lisu bible has its own narrative history, consisting of script creating, translating, migrating, and copying by hand. At times it was largely influenced by the mission narrative, but at other times, the Lisu bible itself was the lead character in the story. Ultimately, the story of the Lisu bible reflects the Lisu Christian story of moving from missionary beginnings to local leadership and, ultimately, to local theological inquiry.
Dietary Chitooligosaccharide Inclusion as an Alternative to Antibiotics Improves Intestinal Morphology, Barrier Function, Antioxidant Capacity, and Immunity of Broilers at Early Age
Authors: Li Jun , Cheng Yefei , Chen Yueping , Qu Hengman , Zhao Yurui , Wen Chao , Zhou Yanmin
Published: July 2019

This study aimed to investigate the effects of chitooligosaccharide (COS) inclusion as an alternative to antibiotics on growth performance, intestinal morphology, barrier function, antioxidant capacity, and immunity in broilers. In total, 144 one-day-old Arbor Acres broiler chicks were randomly assigned into 3 groups and fed a basal diet free from antibiotics (control group) or the same basal diet further supplemented with either chlortetracycline (antibiotic group) or COS, for 21 days. Compared with the control group, inclusion of COS reduced the feed to gain ratio, the jejunal crypt depth, the plasma diamine oxidase activity, and the endotoxin concentration, as well as jejunal and ileal malondialdehyde contents, whereas increased duodenal villus height, duodenal and jejunal ratio of villus height to crypt depth, intestinal immunoglobulin G, and jejunal immunoglobulin M (IgM) contents were observed, with the values of these parameters being similar or better to that of the antibiotic group. Additionally, supplementation with COS enhanced the superoxide dismutase activity and IgM content of the duodenum and up-regulated the mRNA level of claudin three in the jejunum and ileum, when compared with the control and antibiotic groups. In conclusion, dietary COS inclusion (30 mg/kg), as an alternative to antibiotics, exerts beneficial effects on growth performance, intestinal morphology, barrier function, antioxidant capacity, and immunity in broilers.
Optimization of Ultrasound-Assisted Extraction of Phenolic Compounds from Black Locust (Robiniae Pseudoacaciae) Flowers and Comparison with Conventional Methods
Authors: Savic Gajic Ivana , Savic Ivan , Boskov Ivana , Žerajić Stanko , Markovic Ivana , Gajic Dragoljub
Published: July 2019

The aim of this study was to optimize the ultrasound-assisted extraction of phenolic compounds from black locust (Robiniae pseudoacaciae) flowers using central composite design. The ethanol concentration (33–67%), extraction temperature (33–67 °C), and extraction time (17–33 min) were analyzed as the factors that impact the total phenolic content. The liquid-to-solid ratio of 10 cm3 g−1 was the same during extractions. The optimal conditions were found to be 59 °C, 60% (v/v) ethanol, and extraction time of 30 min. The total phenolic content (TPC = 3.12 gGAE 100 g−1 dry plant material) and antioxidant activity (IC50 = 120.5 µg cm−3) of the extract obtained by ultrasound-assisted extraction were compared with those obtained by maceration (TPC = 2.54 gGAE 100 g−1 dry plant material, IC50 = 150.6 µg cm−3) and Soxhlet extraction (TPC = 3.22 gGAE 100 g−1 dry plant material, IC50 = 204.2 µg cm−3). The ultrasound-assisted extraction gave higher total phenolic content and better antioxidant activity for shorter extraction time so that it represents the technique of choice for the extraction of phenolic compounds. The obtained extract, as the source of antioxidants, can be applied in the pharmaceutical and food industries.
Influence of the Nasometric Instrument Structure on Nasalance Score
Authors: Woo Seong Tak , Park Young Bin , Oh Da Hee , Ha Ji-Wan
Published: July 2019

Owing to the development of medical technology, devices to assess resonance (hypernasality and hyponasality) which result from conditions such as cleft palate and brain injury are being studied. In general, nasometric instruments are used to support clinical judgments of these disorders. For conventional separation-type nasometric instruments, there is an acoustic feedback effect between oral and nasal sounds. Recently, a mask-type nasometric instrument was developed for acoustic feedback insensitivity, but it has not yet been popularized. In this study, we analyzed the acoustic characteristics of the mask-type structure according to existing nasometric instruments. We evaluated the acoustic collection characteristics of the structure through the lumped-element model with an electromechanical-equivalent circuit. The analysis confirmed that the optimum area of the acoustic hole was obtained and a closed-type mask structure could be designed. In addition, we obtained voice data from a healthy control group and examined significant differences in the structure of the separation-type and mask-type nasometric instruments. Consequently, we confirmed a significant difference in nasalance according to the acoustic collection structure of the nasometric instruments.
Mechanism of Catalytic CNTs Growth in 400–650 °C Range: Explaining Volcano Shape Arrhenius Plot and Catalytic Synergism Using both Pt (or Pd) and Ni, Co or Fe
Authors: Lobo Luis Sousa
Published: July 2019

The Arrhenius plot of catalytic carbon formation from olefins on Ni, Co, and Fe has a volcano shape in the range 400–550 °C with reaction orders 0 (at lower T: Below ~500 °C) and one (at higher T: Above ~500 °C) at each side of the maximum rate. The reaction follows a catalytic route with surface decomposition of the gas (olefin) on the catalyst nanoparticle, followed by the bulk diffusion of carbon atoms and carbon nanotube growth on the opposite side. At the higher temperature region (500–550 °C), the initial surface reaction step controls the rate and the reaction order is one, both in olefins and hydrogen (H). This confirms that H is essential for the surface reaction to occur. This is very valuable information to get faster CNT growth rate at relatively low temperatures. The apparent activation energy observed must correspond with the surface reaction Ea corrected for the temperature dependence of the two molecules involved (olefin and H). Adding a noble metal (Pt, Pd) to the carbon formation catalyst is frequently found to increase the reaction rate further. This effect has been described as an H spillover since 1964. However, there is evidence that the bulk diffusion of H atoms prevails and does not “spillover” the surface diffusion. Diffusion of H atoms through the solids involved is easy, and the H atoms remain single (“independent”) until emerging on a surface.
Prediction of Fault Fix Time Transition in Large-Scale Open Source Project Data
Authors: Sone Hironobu , Tamura Yoshinobu , Yamada Shigeru
Published: July 2019

Open source software (OSS) programs are adopted as embedded systems regarding their server usage, due to their quick delivery, cost reduction, and standardization of systems. Many OSS programs are developed using the peculiar style known as the bazaar method, in which faults are detected and fixed by developers around the world, and the result is then reflected in the next release. Furthermore, the fix time of faults tends to be shorter as the development of the OSS progresses. However, several large-scale open source projects encounter the problem that fault fixing takes much time because the fault corrector cannot handle many fault reports. Therefore, OSS users and project managers need to know the stability degree of open source projects by determining the fault fix time. In this paper, we predict the transition of the fix time in large-scale open source projects. To make the prediction, we use the software reliability growth model based on the Wiener process considering that the fault fix time in open source projects changes depending on various factors such as the fault reporting time and the assignees to fix the faults. In addition, we discuss the assumption that fault fix time data depend on the prediction of the transition in fault fixing time.
A Structure-Reconfigurable Soft-Switching DC-DC Converter for Wide-Range Applications
Authors: Huo Xianxu , Xu Ke , Liu Ruixin , Chen Xi , Li Zhanchun , Yan Haiyun
Published: July 2019

In this paper, a structure-reconfigurable resonant DC-DC (direct current – direct current) converter is presented. By controlling the state of the auxiliary switch, the converter could change the resonant structure to acquire a high efficiency and wide voltage gain range simultaneously. The characteristics of the LLC (inductor-inductor-capacitor) resonant converter are firstly analyzed. Based on this, through introducing additional resonant elements and adopting the topology morphing method, the proposed converter can be formed. Moreover, a novel parameter selection method is discussed to satisfy both working states. Then, a detailed loss analysis calculation is conducted to determine the optimal switching point. In addition, an extra resonant zero point is generated by the topology itself, and the inherent over-current protection is guaranteed. Finally, a 500 W prototype is built to demonstrate the theoretical rationality. The output voltage is constant at 400 V even if the input voltage varies from 160 to 400 V. A peak efficiency of 97.2% is achieved.