bluuebunny/crossref_metadata_2025 huggingface dataset:
Cutter-disc consumption during earth pressure balance tunnelling in mixed strata
Authors: Elbaz Khalid , Shen Shui-Long , Cheng Wen-Chieh , Arulrajah Arul
Published: February 2018

The wear of excavation tools is considered to be one of the critical factors affecting the scheduling of shield tunnel construction. There is presently no effective countermeasure to prevent severe wear of excavation tools during tunnelling operations in complex geological formations. In addition, such wear is likely to lead to other problems, such as face instability and an unfavourable rate of tunnel advancement. The study reported in this paper analysed the various factors that affected the wear and performance of excavation tools during earth pressure balance machine tunnelling at the Ma-Lian section of line 9 of the Guangzhou metro, China. It was found that tunnelling in mixed ground conditions (upper soft and lower hard strata) led to severe wear of the cutter discs, resulting in additional costs and schedule delays. The foam expansion ratio, concentration of foaming agent and the foam injection ratio were measured to be 20, 2·5% and 40% respectively. Pre-grouting and effective soil conditioning were also found to prevent excessive wear of the cutter discs and surface collapse incidents caused by face instability.
Anticoagulant therapy in patients with atrial fibrillation and reduced kidney function of diabetic and non-diabetic etiologies
Authors: Sokolova A A , Daabul I S , Tsarev I L , Napalkov D A , Fomin V V
Published: February 2018

Aim. To evaluate the efficacy and safety of direct oral anticoagulants (DOACs) in patients with atrial fibrillation (AF) and stages I-III chronic kidney disease (CKD). Subjects and methods. The cohort parallel-group study included 92 patients with AF and stages I-III diabetic and non-diabetic CKD, who were treated with DOACs (dabigatran, rivaroxaban, or apixaban) and vitamin K antagonists (warfarin). The follow-up duration was 12 months. Results. Thromboembolic events and bleeding, which required patient hospitalization or blood transfusions, were not recorded during 1-year follow-up. There was no clinically significant progression of CKD in the groups of therapy with vitamin K antagonists or DOACs. Just the same, a more intense decrease in glomerular filtration rate and a high rate of hemorrhagic complications were revealed in the subgroup of patients with diabetes mellitus (DM) versus those with non-diabetic CKD. Conclusion. In patients with non-valvular AF and diabetic and non-diabetic CKD, the use of DOACs effectively and safely prevents thromboembolic events, irrespective of the stage of CKD. At the same time, in patients taking anticoagulants, CKD progresses more rapidly in the presence of DM than in its absence, regardless of a specific anticoagulant. Hemorrhagic complications are more common in patients with AF, DM, and CKD, which requires more frequent monitoring of their kidney function.
Role of neutrophil dysfunction in the pathogenesis of systemic lupus erythematosus
Authors: Smirnova E V , Krasnova T N , Proskurnina E V , Mukhin N A
Published: February 2018

Neutrophil dysfunction plays a considerable role.in systemic lupus erythematosus (SLE) The protective function of neutrophils is carried out through various mechanisms: isolation of granular antimicrobial peptides (gAMP), microbial phagocytosis with subsequent degradation via reactive oxygen species inside the phagolysosomes; as well as bactericidal action due to the release of networks from chromatin and gAMP, also called neutrophil extracellular traps (NECTs). The development of neutropenia in SLE has multiple causes, including the formation of antibodies directly to leukocytes; that of neutralizing autoantibodies to the growth factors of neutrophils and cells - myeloid precursors; bone marrow suppression; involvement of neutrophils in the processes of apoptosis and NETosis. Neutrophils in SLE are characterized by reduced phagocytic ability and pathological oxidative activity. In SLE, there is a decrease in the ability to remove the products of neutrophil apoptosis, which is correlated with disease activity. SLE patients are noted to have a higher expression level of the genes specific for low-density granulocytes, an abnormal immature neutrophil population. The impaired processes of formation of NECTs and removal NETosis products play a substantial role in the pathogenesis of SLE. It is shown that the abnormal formation of NECTs also causes endothelial injury and increases the risk of thromboses. The design of novel drugs that act on the specific parts of the formation of NECTs or contribute to their removal from the extracellular environment can propel therapy for SLE and other autoimmune diseases to new heights. There is evidence for further investigations of neutrophil-mediated pathogenetic processes in SLE in order to identify potential therapeutic targets and to understand the mechanisms of action of drugs used in clinical practice.
Melatonin and hypertension: a possible role in combination therapy
Authors: Budnevsky A V , Ovsyannikov E S , Rezova N V , Shkatova Ya S
Published: February 2018

This literature review gives the results of clinical trials studying the association of the level of endogenous melatonin and blood pressure (BP), the effects of exogenous melatonin on BP (particularly at night) in relation to the used rapid- or controlled-release formulation of melatonin.
Forecasting medium-term electricity demand in a South African electric power supply system
Authors: Sigauke Caston
Published: February 2018

The paper discusses an application of generalised additive models (GAMs) in predicting medium-term hourly electricity demand using South African data for 2009 to 2013. Variable selection was done using least absolute shrinkage and selection operator (Lasso) via hierarchical interactions, resulting in a model called GAM-Lasso. The GAM-Lasso model was then extended by including tensor product interactions to yield a second model, called GAM- -Lasso. Comparative analyses of these two models were done with a gradient-boosting model to act as a benchmark model and the third model. The forecasts from the three models were combined using a forecast combination algorithm where the average loss suffered by the models was based on the pinball loss function. The results showed significantly improved accuracy of forecasts, making this study a useful tool for decision-makers and system operators in power utility companies, particularly in maintenance planning including medium-term risk assessment. A major contribution of this paper is the inclusion of a nonlinear trend. Another contribution is the inclusion of temperature based on two thermal regions of South Africa.
IHC-F Protocol v2
Authors: Xia Cj
Published: February 2018

Immunohistochemistry (IHC) is a method that combines biochemical, histological and immunological techniques into a simple but powerful assay for protein detection. IHC provides valuable information as it visualizes the distribution and localization of specific cellular components within cells and in proper tissue context. This protocol describes the steps for performing the immunohistochemistry method with frozen tissue sections.
IHC-P Protocol v2
Authors: Xia Cj
Published: February 2018

Immunohistochemistry (IHC) is a method that combines biochemical, histological and immunologicaltechniques into a simple but powerful assay for protein detection. IHC provides valuable information as itvisualizes the distribution and localization of specific cellular components within cells and inproper tissue context. This protocol describes the steps for performing the immunohistochemistry method with paraffin-embedded tissue sections.
Serological Survey of Rabies Virus Infection among Bats in Brazil
Authors: Horta Marco Aurelio , Oliveira Dayse G. , Miranda Eliane M. C. , Fernandes Jorlan , Ferreira Michelle , Guterres Alexandro , Cordeiro Jose L.P. , Brandão Martha , Novaes Roberto , Barreira Jairo D. , Oliveira Renata , Lassance Arnaldo L. , Moratelli Ricardo , Lemos Elba R.S. , Romijn Phyllis
Published: February 2018

Rabies is a disease caused by a virus belonging to the family Rhabdoviridae, genus Lyssavirus (RABV), and is characterized as a progressive and acute encephalitis that presents high lethality. Between 2002 and 2012, 2149 wild animals were found positive for RABV in Brazil where 79% were associated with the aerial cycle of the disease. As part of the active surveillance of rabies in Brazil, the objective of this study was to investigate the presence of RABV infection in bats captured in two different regions of Brazil. Bat specimens were collected in (i) the metropolitan region of Rio de Janeiro city, (ii) Igrapiúna Municipality, Bahia State, and (iii) Serra do Tabuleiro State Park (PEST) in Santa Catarina State. Forty-four bats from the two first areas were tested for RABV at Institute Jorge Vaitsman (IJV), reference laboratory for rabies in Rio de Janeiro State. Of the individuals captured and sent for the diagnosis of rabies, a total of 15 were identified as being hematophagous, all of them belonging to the species Desmodus rotundus. Twenty-four individuals were considered as frugivorous, four as insectivores and one individual (Lonchophylla peracchii) identified as having a pollen/nectar feeding habit. All specimen sent to RABV diagnosis presented negative results. Considering the active surveillance for RABV in Brazil, studies of fauna survey with serological characterization are important in the strengthening of epidemiological surveillance and protection of human life.
ACTORS DEFINING ROLE IN DEVELOPMENT OF ARCHITECTURAL AND HISTORICAL ENVIRONMENT IN SAMARA VOLGA REGION
Authors: VAVILONSKAYA Tatyana V.
Published: February 2018

On the example of Samara Region actors are identified that influence on the priority vector and the development level of architectural and historical environment, the scope of their interests is defined. The article analyzes the interests of the authorities, the subjects of urban planning and conservation management, as well as ordinary people. The model of interaction between different actors is created, it is shown that these actors are consolidated into local communities, depending on the kind of activities. The heterogeneity of environment conceptions of local communities and of actors inside the same community is revealed. Renewal vector has the priority in the Samara Volga. The efforts correlation of different actors for the conservation and renovationl of environment is achieved by changing of value judgments of ordinary people.
ARCHITECTURE AND COMPOSITION PRINCIPLES OF KUIBYSHEV DEVELOPMENT ACCORDING TO GENERAL PLAN OF 1949
Authors: TEMNIKOVA Elena A.
Published: February 2018

This article details the concept of development of the General Plan of the city of Kuibyshev of 1949. The necessity of quick reaction development of city master plan is highlighted. Natural potentials of territory are in the core of urban development idea as well as residential areas location in the most «advantageous» in terms of architecture and sanitary sciece. The existing city composite scheme that allowed to project on an elevated area parallel to r. Volga main road - Novo- Sadovaya street is revealed. Functional division of the city is shown. The basic principle of the residential areas solution - the creation of architectural ensembles not only outside the quarter, but also inside it maintaining the functionality of all the elements - is determined.
CRITERIA FOR EVALUATION OF VENTILATED FACES QUALITY
Authors: NETISHINA Kristina A. , RYAZANOVA Galina N.
Published: February 2018

The article describes an approach to probabilistic and physical modeling of walling reliability taking into account temperature, moisture and operation conditions, structural elements load specifi cation, reliability indicators and failure probability. The durability (service life) is taken as the main reliability indicator. The man-made and climatic impact on building construction durability is studied. It is proved that ventilated faces are a modern design solution for construction of new buildings as well as reconstruction.
DESIGN TECHNOLOGIES ROLE IN ARCHITECTURAL ENVIRONMENT AND SOCIAL PROGRESS
Authors: SHUVALOVA Ekaterina M. , MALYSHEVA Svetlana G.
Published: February 2018

In the article the role of design and its instruments in architectural environment is viewed, design goals are scheduled, design place in social progress is determined. The research deals with key aspects of profession of designer in context of modern environment and cultural necessity. The problem of design methods integration in society by means of involvement principles is studied. It is proved that designer plays a role of communicator and new technologies provider and this fact conditions specifi city of design methods in designer profession. The solution for the problem of architectural environment depersonalization and its subject fi lling is proposed on the base of latest achievements of technology and humanities.
DEVELOPMENT TRENDS AND CREATION OF NEW BUILDING MATERIALS
Authors: LITVINOVA Yulia V.
Published: February 2018

Trends, regularities and eventual development ways of construction materials, items and structures revealed on the base of patents fond and recent researches analysis are shown in the article. Scientifi c literature sources analysis proves that construction materials and structures development and their production technologies are obeyed some regularities which can be studied and used for construction materials and structures perfecting. It should also be taken into account that materials from production to use in construction undergo signifi cant changes - from liquid, pseudoliquid and fl uid state to hard state. Final product should meet requirements of strength, durability, damage tolerance. The most advantageous ways of constructional materials perfecting are revealed. Based on the research results every next step in especial materials and structures development can be predicted.
INFLUENCE OF TYPE OF CRIMEAN QUARRIES CARBONATE WASTE ON DURABILITY, СURING TIME AND STRUCTURE FORMATION OF SLAG-LIME CONCRETE ON THE BASIS OF SOLUBLE GLASS WITH SILICATE MODULE 1,5-1,7
Authors: SVISHCH Igor S. , NOSATOVA Elena V.
Published: February 2018

In the article the infl uence of carbonate waste on durability, curing time and structure formation of slag-lime concrete of diff erent compositions with diff erent curing conditions on the basis of soluble glass with silicate module Mc=1,5-1,7 is considered as well as Crimean quarries stone-cutt ing waste. Slag-lime binders are diffi cult in-use because of curing time and its infl uence on concrete brick durability. One of ways of sett ing time regulation lies in introduction of some stone-cutting waste in blast-furnace grained slag before grinding. The studies of stone-cutt ing waste infl uence on curing time, durability and structure formation of slag-lime binder and concretes on its basis are able to show mechanism of curing time regulation and it will work to correct technological parameters of construction items production. The phase composition is studied with help of the diff erential thermal, x-ray diff raction and microstructural analyses.
DEFINING FIRE AND TECHNICAL CHARACTERISTICS OF A STEEL BEAM WITH CORRUGATED WEB AND ITS COMPLEX LINING
Authors: ILYIN Nikolay A. , PANFILOV Denis A. , ILDIYAROV Evgeny V. , LUKIN Alexey O.
Published: February 2018

This new technical solution introduced in the paper is related to the area of fi re safety and involves the method of determining required indicators of constructional fi re-proof characteristics of a steel beam with corrugated web which in itself is a composite welded I-beam with large sheet and plate lining. The paper also delivers results of patent research on the problem of steel constructions fi re protection and describes other similar technical solutions. The authors analyze shortcomings of these solutions and their technical level, identify tasks and objectives of their new technical solution and demonstrate technical eff ects of the new technology (such as devices, inventions, utility models). Further in the paper activities and measures to achieve the proper technological eff ect are outlined and application peculiarities of fi re and technical characteristics of the integrated steel lining are indicated. The researchers also stress specifi cs of the I-beam components performance evaluation and put forward new analytical equations to calculate fi re resistance characteristics of steel elements as well as a new methodology for determining geometric and heat-technical characteristics of complex fi re-proof lining. There is also an example of calculations according the developed algorithm given in the paper.
ARCHITECTURAL-SPATIAL SOLUTION FOR CHERNOVSK HIGHWAY BUILDING DEVELOPMENT OF KUIBYSHEV CITY
Authors: VOSTRIKOV Vladimir N.
Published: February 2018

This paper considers issues of residential area (which is next to Chernovsk Highway) construction (Yuriy Gagarin str.) which took place in the1960s according to Kuibyshev-city general lay-out. The features of this design decision have been described in the context of general trends in urban planning and architecture and their development. The paper focuses on functional processes in the living environment and objective laws of their management, on user-friendly transport and pedestrian accessibility, and on the creation of an enabling and aesthetically sound environment. It defi nes a type of building development and features of architectural and planning solutions of using typical residential buildings and public facilities, as well as specifi cs of composite construction providing visual communications.
ARCHITECTURAL TOWN-PLANNING DEVELOPMENT OF COSSACK FORTRESS VERKHNEYAITSKAYA
Authors: PONOMARENKO Elena V.
Published: February 2018

The peculiarities of the location of the sett lements of Cossacks. The work is devoted to the analysis of the occurrence and development of Cossack fortress Verkhneyaitskaya and sett lements Verkhneuralsk. Explores the formation of architectural Wednesday. Examines the mutual infl uence of cultures and traditions in the formation of architectural Wednesday. On the basis of the XIXth century eyewitnesses’ recollections, archive investigations and analysis of general sett lements planning schemes, the researcher discovers the peculiarities of planning and housing systems.
RESOURCE-SAVING TECHNOLOGIES IN ARCHITECTURE
Authors: KOTENKO Irina A. , MORDVINOVA Marina V.
Published: February 2018

The article is devoted to the review of the main directions of resource saving in architecture. Along with traditional methods of rational use of material resources in form-education, the authors consider the know-how of high-rise construction using the example of some well-known buildings in the world. Particular att ention in the review is given to the prospective tendencies in the design of energy-effi cient residential buildings, novelties in engineering systems of buildings that allow to economically expending energy and heat. In particular, the authors describe the technology of recuperation, which allows to return some of the heat to the needs of the building. A separate direction of resource conservation is the design and application of energy-effi cient enclosing and window structures, as well as heat-insulating materials. The article contains illustrations of energy-effi cient architecture and its structures.
CENTRALIZED HEAT SUPPLY SYSTEM AND TECHNIQUES OF PLANNING ITS LOADS
Authors: CHICHERIN Stanislav V. , GLUKHOV Sergey V.
Published: February 2018

The paper analyses heat-supply systems of four major Russian cities and heat-supply regulatory documents. The authors investigated company documents providing information on construction objects prospective connection and on unconnected consumers for each heating season. The information contained in the documents was summarized and made anonymous to preserve confi dentiality of consumers. The researchers also studies data from the offi cial site of the Municipal Service Department of Omsk Administration. The data showed housing stock structure and its coverage with centralized heating services. The following percentage rating for reasons causing the thermal load removal is detected: thus, 31 of 47 construction objects with a total load of 80.8% (of the total load removed during the period under review) were switched off the system because of "The resett lement program for citizens from the emergency housing stock" in 2016. Typical problems of a large sett lement centralized heating system operation are also described in the paper. It is shown that there is a tendency towards a signifi cant increase in the amount of annual heat consumption decline underway. This increase in decline may be 32-multiple in some regions, and it may go slow in the others. Making recommendations based on the results of the design calculation will clarify diameters of trunk and intra networks, which the authors see a task for the future. In general, this methodology should help to adjust industrial strategies for consumer needs.
APPLICABILITY OF WATER ζ - POTENTIAL AS ITS POLLUTION DENSITY CHARACTERISTICS
Authors: KICHIGIN Viktor I. , SKOROKHODOV Sergey N.
Published: February 2018

The paper discusses advantages and disadvantages of existing methods for determining water quality. It proposes to use electro-kinetic capacity as a key indicator together with cluster analysis of obtained results. It is shown, that according to such indicators as pH, turbidity, alkalinity, general rigidity, content of ion Ca2+, Mg2+, the quality of drinking water in Samara is stable and consistent with existing standards. The research reveals some zeta-potential (ZP) dependence on water pollution density. It was shown that the link between zeta-potential and various kinds of contamination in drinking water is underexplored and requires further detailed study.
Bibliometrics of Information Technology: Yesterday, Today and Tomorrow
Authors: Garg K.C. , Bebi  , Kavita
Published: February 2018

The study presents a bibliometric analysis of 270 papers presented at the international conference “Information Technology: Yesterday, Today and Tomorrow” organized by the Defence Scientific Information and Documentation Center (DESIDOC), Delhi, of the Defence Research and Development Organization (DRDO) during February 19-21, 2015. The study indicates that more than half of the total presentation was contributed by academic institutions (universities and colleges). Distribution of contributions by country and Indian States indicates that out of 270 papers, only seven were from foreign countries and rest 263 from India. Delhi topped the list among the contributing cities, while DESIDOC topped the list among the contributing institutions. Output of authors by gender indicates that male authors contributed more than female authors. The distribution of references cited in the papers shows that among the different information sources, journal citations were the highest and highest number of cited journals was in the discipline of library and information science. The highest number of cited journals was being published from the USA.
El Pacífico suramericano y su integración con China y Asia
Authors: Torres González Jaime
Published: February 2018

El presente trabajo confronta las políticas industriales seguidas por las naciones suramericanas con las de los países del Sureste del Asia y plantea que la influencia del Consenso de Washington en las primeras permitió desvertebrar su desarrollo industrial, mientras que el tipo de desarrollo económico en Asia ha sido más exitoso, enmarcado en las últimas décadas en lo que se conoce como Consenso de Beijing.Para ello se hace un estudio comparativo de la evolución de diferentes indicadores económicos y sociales de las naciones suramericanas, así como de Malasia, Tailandia y Vietnam, utilizando datos de comercio de las Naciones Unidas-Comtrade e indicadores del World Development Report 2015 del Banco Mundial. Se encuentra que la persistencia de las políticas industriales y gran vinculación al comercio internacionalexplican parte importante de los resultados asiáticos. Una recuperación de dichas políticas en Suramérica podría ayudar a activar la dinámica económica que no ofrece la exportación de recursos naturales.
Graphical Methods For Detecting Dependence
Authors: Guarín-Escudero Julieth V. , Jaramillo-Elorza Mario C. , Lopera-Gómez Carlos M.
Published: February 2018

Copulas have become a useful tool for modeling data when the dependence among random variables exists and the multivariate normality assumption is not fulfilled. The copulas have been applied in several fields. In finance, copulas are used in asset modeling and risk management. In biomedical studies, copulas are used to model correlated lifetimes and competitive risks [1]. In engineering, copulas are used in multivariate process control and hydrological modeling [2]. The interest in modeling multivariate problems involving dependent variables is generalized in several areas, making this methodology in a convenient way to model the dependence structure of random variables. However, in practice there is not a standard method for selecting a copula among several possible models, so that the choice of an appropriate copula is one of the greatest challenges facing the researcher. In this paper some graphical methods for detecting dependencies among random variables are discussed.
A new Generalization of Extended Beta and Hypergeometric Functions
Authors: Nisar Kottakkaran Sooppy , Rahman Gauhar , Mubeen Shahid
Published: February 2018

A new generalization of extended beta function and its various properties,integral representations and distribution are given in this paper. In addition, we establishthe generalization of extended hypergeometric and con uent hypergeometric functionsusing the newly extended beta function. The properties these extended and con uenthypergeometric functions such as integral representations, Mellin transformations, dif-ferentiation formulas, transformation and summation formulas are also investigated.
Aplikasi Kalkulator Fisika untuk Sekolah Menengah Tingkat Pertama (SMP) Berbasis Adobe Flash Pro CS6 Sebagai Pengembangan Media Pembelajaran
Authors: T.W. Alhidayatuddiniyah
Published: February 2018

Abstract:. The purpose of this research is to: (1) produce application of Physics Calculator for Junior High School (SMP) based on Adobe Flash Pro CS6 and (2) to know the feasibility of Physics Calculator application. This application presents a model of physics formula based on basic competence with animation on each material and practice questions with the model referring to UN-CBT standard (National Test-Computer Based Test), in addition to the completion of output in Physics Calculator application showing how to solve . The research and development method used refers to the concept of ADDIE. The feasibility test of Physics Calculator application is done by distributing assessment sheet or validation to two media experts, two material experts, and 9th grade student SMPN 102 Jakarta responses. The percentage of respondents' assessment of Physics Calculator app by media experts, material experts, and students is 93.45%, 94.10%, and 92.44%. From the tests performed known menu and application features in accordance with the design and work well on Windows 10 operating system, and learning media becomes more interesting and innovative.

Abstrak: Tujuan penelitian ini untuk: (1) menghasilkan aplikasi Kalkulator Fisika untuk Sekolah Menengah Tingkat Pertama (SMP) berbasis Adobe Flash Pro CS6 dan (2) mengetahui kelayakan aplikasi Kalkulator Fisika. Aplikasi ini menyajikan model perhitungan rumus fisika yang berdasarkan kompetensi dasar dengan animasi pada setiap materi dan soal-soal latihan dengan model yang mengacu pada standar UN-CBT (Ujian Nasional-Computer Based Test), selain itu output penyelesaian pada aplikasi Kalkulator Fisika menampilkan cara penyelesaiaanya. Metode penelitian dan pengembangan yang digunakan mengacu pada konsep ADDIE. Pengujian kelayakan aplikasi Kalkulator Fisika dilakukan dengan membagikan lembar penilaian atau validasi kepada dua ahli media, dua ahli materi, dan respon siswa kelas IX SMPN 102 Jakarta. Hasil persentase penilaian responden terhadap aplikasi Kalkulator Fisika oleh ahli media, ahli materi, dan siswa sebanyak 93.45%, 94.10%, dan 92.44%. Dari pengujian yang dilakukan diketahui menu dan fitur aplikasi sesuai dengan rancangan dan berfungsi dengan baik pada operating system Windows 10, serta media pembelajaran menjadi lebih menarik dan inovaif.
Pengembangan Asesmen Keterampilan Berpikir Kreatif Siswa SMP Negeri 5 Madiun pada Materi Cahaya dan Alat Optik
Authors: Kristiani Kornelia Devi , Mayasari Tantri , Kurniadi Erawan
Published: February 2018

Abstract: The purpose of this research is developing the assessment of creative thinking skill of SMP Negeri 5 Madiun students in light material and optical asesment. The assessment consists of a number of essay questions that require students' creative thinking skills that are developed using indicators of creative thinking skills such as fluency, flexibility, originality, and elaboration. The development research procedure adapts from the limited Four-D development model that includes Define, Design, and Develop. Selected expert subject (expert) as the validator of students' creative thinking skill assessment. The subjects of the experiment are students of class VIII A SMP Negeri 5 Madiun. Assessment of creative thinking skills involves experts, including creative thinking experts, learning experts, and content physics experts (criticizing the depth and truth of physics matter). Experts validate content, rate products and questionnaire student responses. The result of this research is validation assessment and get expert suggestion as validator, revised and tested again until calculated by CVR and CVI calculation with acquisition of CVR is 1 and CVI is 1, hence the result of validity about student creative thinking skill declared valid and very appropriate to be used as an assessment of creative thinking skills.

 

Abstrak: Tujuan dari penelitian pengembangan ini yaitu mengembangkan asesmen keterampilan berpikir kreatif siswa SMP Negeri 5 Madiun pada materi cahaya dan alat optik. Assesmen yang dibuat terdiri dari sejumlah soal essay yang menuntut keterampilan berpikir kreatif siswa yang disusun menggunakan indikator keterampilan berpikir kreatif seperti kemampuan berpikir lancar (fluency), luwes (flexibility), orisinil (originality), dan memperinci (elaboration). Prosedur penelitian pengembangan mengadaptasi dari model pengembangan Four-D terbatas yang meliputi Define, Design, dan Develop. Dipilih subyek ahli (expert) sebagai validator asesmen keterampilan berpikir kreatif siswa. Subyek uji coba yaitu siswa kelas VIII A SMP Negeri 5 Madiun. Asesmen keterampilan berpikir kreatif melibatkan para ahli, antara lain ahli berpikir kreatif, ahli pembelajaran, dan ahli konten fisika (mengkritisi dari kedalaman dan kebenaran materi fisika). Para ahli memvalidasi isi,  menilai produk dan angket respon siswa. Hasil penelitian ini yaitu asesmen yang telah di validasi dan mendapatkan saran dari ahli (expert) sebagai validator, direvisi dan diujikan kembali hingga dihitung dengan perhitungan CVR dan CVI dengan perolehan CVR sebesar 1 dan CVI sebesar 1, dengan demikian hasil validitas soal keterampilan berpikir kreatif siswa dinyatakan valid dan sangat sesuai untuk dijadikan assesmen keterampilan berpikir kreatif.
Studi Eksperimental Pengaruh Frekuensi Bunyi dan Panjang Resonator Lurus Terhadap Penurunan Suhu Dalam Alat Pendingin Termoakustik Tipe Gelombang Berjalan
Authors: Gupita Mega C. , Setiawan Ikhsan , Utomo Agung B. S.
Published: February 2018

Abstract:. Traveling wave thermoacoustic refrigerators are alternative and environmentally friendly cooling devices which use traveling sound wave in heat removing process to have some cooling. The structure of these devices usually have a combination of a straight resonator tube and a loop tube. In this experiment, we used PVC (polyvinyl chloride) pipe with inner diameter of 55 mm to construct the resonator and loop tubes. The working gas inside the tubes is atmospheric air. The regenerator has 40 mm length and 53 mm diameter, it is made of a tight stack of stainless-steel wire-mesh screens with mesh number of 60 mesh/inch. A 10-inch loudspeaker and an audio amplifier are used as the sound source. Audio signal and frequency are provided and controlled by using a function generator. In this research, the influences of sound frequency and resonator length on the temperature decrease of air are studied experimentally, with the loop tube length is constant at 390 cm. The sound frequency is varied in the range of 26 Hz – 43 Hz, while the resonator range is varied into 40cm, 55cm, 80cm, 105cm, and 130cm. Experimental results show that the maximum temperature decrease of 21.4°C (i.e. from 26.5°C down to 5.1°C) is obtained by using 105 cm resonator length and 31 Hz sound frequency.

 

Abstrak: Peranti pendingin termoakustik gelombang berjalan merupakan alat pendingin alternatif ramah lingkungan yang menggunakan gelombang bunyi berjalan untuk melakukan pemindahan kalor sehingga menghasilkan pendinginan. Alat pendingin termoakustik ini umumnya memiliki struktur berupa gabungan pipa resonator lurus dan pipa simpal. Pada eksperimen ini, pipa yang digunakan adalah pipa PVC (polyvinyl chloride) memiliki diameter-dalam 55 mm. Pipa resonator dan simpal berisi udara biasa sebagai gas kerja. Regenerator yang digunakan memiliki panjang 40 mm dengan diameter sekitar 53 mm dan terbuat dari lembaran-lembaran kasa kawat stainless-steel berukuran 60 mesh/inchi yang disusun rapat. Sebuah loudspeaker 10 inci serta sebuah unit penguat audio digunakan sebagai sumber bunyi. Sinyal dan frekuensi audio diberikan dan diatur dengan sebuah unit function generator. Pada penelitian ini, pengaruh frekuensi bunyi dan panjang pipa (resonator) lurus terhadap besar penurunan suhu udara dipelajari secara eksperimen dengan panjang (keliling) simpal dibuat tetap sebesar 390 cm. Frekuensi bunyi divariasikan dalam interval 26 Hz – 43 Hz, sedangkan pipa resonator memiliki variasi panjang 40 cm, 55 cm, 80 cm, 105 cm, dan 130 cm. Hasil eksperimen menunjukkan bahwa penurunan suhu terbesar yaitu 21,5 °C (dari 26.5 °C menjadi 5.1 °C) diperoleh dengan panjang resonator 105 cm dengan frekuensi bunyi 31 Hz.
Physics Comprehensive and Contextual Teaching Material (PhysCCTM) untuk Meningkatkan Higher Order Thinking Skill (HOTS) Siswa SMA
Authors: Adi Nugroho Prasetya , Suparno Suparno , Mudilarto Mudilarto , Istiyono Edi , Alpin Y Rattiwizal , Zaini Muhammad , M.J.A Syayid Qosim
Published: February 2018

Abstract: This study aimed to: (1) produce Physics Comprehensive and Contextual Teaching Material (PhysCCTM) which was reasonably for physics learning in SMA, and (2) examine the effectiveness of Physics Comprehensive and Contextual Teaching Material (PhysCCTM) to increase students Higher Order Thinking Skill (HOTS). This research used R&D methods with 4D models consisting of (1) Define, (2) Design, (3) Developt, and (4) Disseminate. The resulted product is PhysCCTM. The data were colleted by using an evaluation sheet of product, and test of HOTS. The data were analyzed using Aiken V to assess the product quality, and N-Gain analysis. The result of this research produced teaching material PhysCCTM which: (1) was reasonably to increase students HOTS with very good category based on expert, teachers, and good category based the response of students, and (2) effective to increase students HOTS significantly by effectivity on Partial Eta Squared in Multivariate Test with the value is 90,4%.

 

Abstrak: Penelitian ini bertujuan: (1) untuk menghasilkan Physics Comprehensive and Contextual Teaching Material (PhysCCTM) yang layak untuk pembelajaran fisika di SMA, dan (2) menguji efektivitas Physics Comprehensive and Contextual Teaching Material (PhysCCTM) dalam meningkatkan Higher Order Thingking Skill (HOTS) siswa SMA. Penelitian pengembangan ini menggunakan metode R&D dengan model 4D yang meliputi tahap (1) Define, (2) Design, (3) Develop, dan (4) Disseminate. Produk yang dihasilkan adalah PhysCCTM. Instrumen pengumpulan data yang digunakan adalah lembar penilaian perangkat pembelajaran, dan lembar penilaian HOTS. Teknik analisis data yang digunakan adalah Aiken V untuk melihat kualitas produk dan analisis General Linier Model (GLM). Hasil penelitian menunjukkan bahwa telah dihasilkan produk PhysCCTM yang: (1) layak digunakan untuk meningkatkan HOTS dengan kategori sangat baik berdasarkan penilaian ahli dan guru, serta kategori baik berdasarkan respon siswa, dan (2) efektif untuk meningkatkan HOTS siswa secara signifikan berdasarkan efektivitas pada Partial Eta Square di Multivariate Test dengan nilai 90,4%.
Media Pembelajaran Fisika Modern Berbasis Android Menggunakan Adobe Flash CS6 dengan Animasi Tiga Dimensi pada Materi Model Atom untuk Siswa Kelas XII SMA
Authors: Susilawati Susilawati , Oktova Raden , Lestari Della Putri Nindi
Published: February 2018

Abstract:. Developments in educational technologies are influenced by developments  of technologies in general, including the use of android-based smartphones as a learning medium. At high schools android-based learning provides an attractive alternative to conventional independent learning using work sheets. This paper reports the development of a practical, interactive and attractive android-based modern physics learning medium on atomic models using Adobe  Flash CS6 with three-dimensional animations for twelfth year high school students.  The development was based on the ADDIE model (Analysis-Design-Development-Implementation-Evaluation). The feasibility of the medium was validated using questionnaires by medium (IT) experts, subject experts, and twelfth year high school students as users. The feasibility level of the medium given by the medium experts, the subject experts, and the students are, respectively, 95.0 %, 93.0 %, dan 85.0 %. It is concluded that the medium developed is feasible for independent learning.

 

Abstrak: Perkembangan teknologi pendidikan tidak terlepas dari perkembangan teknologi pada umumnya, termasuk penggunaan telepon pintar berbasis android sebagai media pembelajaran. Di SMA, pembelajaran berbasis android dapat menjadi salah satu alternatif yang menarik dibandingkan pembelajaran mandiri konvensional dengan mengerjakan lembar kerja siswa (LKS). Tujuan penelitian ini adalah untuk menghasilkan media pembelajaran Fisika Modern berbasis android menggunakan Adobe  Flash CS6 dengan animasi tiga dimensi pada materi Model Atom untuk siswa Kelas XII SMA yang praktis, interaktif dan menarik untuk belajar secara mandiri. Model pengembangan yang digunakan adalah ADDIE (Analysis-Design-Development-Implementation-Evaluation). Untuk mengetahui kelayakan media dilakukan validasi dengan angket oleh ahli media (TI), ahli materi, dan pengguna siswa Kelas XII SMA. Tingkat kelayakan media yang diberikan oleh ahli media, ahli materi  dan pengguna berturut-turut adalah sebesar  95,0 %, 93,0%, dan 85,0 %. Dapat disimpulkan bahwa media yang dikembangkan layak digunakan untuk belajar secara mandiri.
Metode Analisis Model Peluruhan Bahan Radioaktif dengan Menggunakan Sensor Gaya dan Rekaman Video
Authors: Apriati Yosephine Novita , Santosa Ign Edi
Published: February 2018

Abstract: The number of decayed radioactive materials each time leads to the exponential law. Process of the decaying radioactive materials can’t easily be seen, so it can be modeled using the flow of water from a vertical column through a pipe. A force sensor can be used to collect data that showing the decline of water surface in a column. A pipe inserted in a tube contain of water is suspended in the force sensor. The force sensor is connected to a computer. The output shows an exponential graph identical to the exponential law of radioactive decay graph. Another method to collect data for height of water surface each time is using a camera. A video of the declining water surface can be analyzed using video analyzer from Logger Pro. The graph result is also identical with the radioactive decay graph. From both of the methods the decay constant can be found. By using a pipe with radius cm the decay constant for force sensor and camera methods consequently are  and  The method using a video record that being analyzed by video analyzer is easier to be done because the tools are easy to get. A camera can even be found in a cellphone and an application providing video analysis also can easily be downloaded from the internet.

 

Abstrak: Jumlah bahan radioaktif yang meluruh setiap waktu mengikuti grafik eksponensial. Peristiwa peluruhan bahan radioaktif yang sulit diamati dapat dimodelkan dengan menggunakan peristiwa penurunan air dalam suatu tabung yang diberi pipa keluaran. Salah satu metode pencatatan data peristiwa penurunan tersebut dilakukan dengan menggunakan sensor gaya. Sebuah tabung berisi air yang diberi pipa keluaran digantungkan pada sebuah sensor gaya yang dihubungkan dengan komputer. Hasil grafik berat air setiap waktu menunjukkan grafik eksponensial yang identik dengan grafik peluruhan bahan radioaktif. Metode lain yang dapat dilakukan adalah dengan merekam ketinggian air setiap waktu di dalam tabung menggunakan kamera. Hasil rekaman dianalisis dengan menggunakan aplikasi video analyzer dari software Logger Pro. Hasil analisis menunjukkan ketinggian air setiap waktu mengikuti grafik peluruhan bahan radioaktif. Dengan menggunakan pipa keluaran berukuran  cm diperoleh nilai konstanta peluruhan dengan metode sensor gaya dan metode rekaman secara berturut-turut adalah  dan  Metode dengan rekaman video yang dianalisis dengan aplikasi video analyzer dari software Logger Pro  lebih mudah dilakukan karena hanya membutuhkan sebuah kamera perekam. Aplikasi video analyzer juga mudah diunduh di internet.
Profil Kesalahan Siswa dalam Menyelesaikan Soal Getaran dan Gelombang Berbasis HOTS (Higher Order Thinking Skill)
Authors: Ekawati Fitrianing , Handhika Jeffry , Huriawati Farida
Published: February 2018

Abstrak: Penelitian yang dilakukan bertujuan untuk mengidentifikasi kesalahan-kesalahan yang dilakukan siswa dalam  menyelesaikan soal-soal fisika pada materi getaran dan gelombang. Penelitian yang dilakukan menggunakan metode deskriptif kualitatif. Penelitian dilaksanakan SMPN 2 Geger.  Subyek penelitian yang dipilih adalah siswa kelas VIII A. Analisis data dilakukan terhadap 26 siswa. Teknik pengumpulan data dengan metode observasi dan metode tes. Validasi data dilakukan dengan triagulasi data yaitu membandingkan data hasil observasi dan data hasil tes. Analisis data dilakukan melalui tahap reduksi data, penyajian data, dan penarikan kesimpulan. Berdasarkan analisis data dan pembahasan diperoleh kesimpulan: kesalahan dalam memahami konsep dan kesalahan interpretasi, siswa tidak dapat memahami simbol yang digunakan dalam  menjawab soal.
Pengembangan Lembar Kerja Siswa (LKS) Fisika Berbasis Contextual Teaching and Learning (CTL) Untuk Meningkatkan Prestasi Belajar Siswa
Authors: Bahri Muadin Wasis Saeful , Widodo Widodo
Published: February 2018

Abstrak: Penelitian ini bertujuan untuk mengetahui adanya peningkatan prestasi siswa dalam pembelajaran fisika dengan lembar kerja siswa berbasis contextual teaching and learning (CTL). Jenis penelitian ini adalah penelitian pengembangan dengan subjek penelitian siswa kelas VIII SMP Muhammadiyah Pakem Yogyakarta tahun 2017/2018.Data yang diperoleh dianalisis menggunakan uji t pada taraf signifikan 5% dengan hasil sebesar P=0,000, artinya ada perbedaan prestasi belajar kelas yang menggunakan LKS berbasis CTL dibanding dengan kelas dengan pembelajaran konvensional.Rata-rata nilai N-Gain diperoleh melalui data posttest dan pretest. Nilai rata-rata kelas kontrol sebesar 0,5462 sedangkan kelas eksperimen sebesar 0,6662. Hal ini menunjukkan bahwa penerapan LKS berbasis CTL yang telah dikembangkan berpengaruh positif untuk meningkatkan prestasi belajar fisika siswa kelas VIII sehingga LKS berbasis CTL tersebut dapat dikembangkan lebih luas.
HYDROLOGY OF THE ABANDONED UNDERGROUND CORNING COAL MINE, PERRY COUNTY, OHIO
Authors:   s Associate Professor of Geology, Ohio U., Athens, OH 45701, Stoertz Mary W.
Published: February 2018

Abstract. The Corning mine complex, a suite of abandoned partially flooded room-and-pillar mines in Perry County, Ohio, contributes nearly 100% of the annual acidity load to upper Sunday Creek. Discharge, which issues from a single hole, averages 73 liters/s (2.6 cfs); acidity load averages 590 kg/day; and metal (Fe, Al and Mn) loads average 260, 2 and 13 kg/day respectively. The discharge is a high priority for remediation, but is not well suited for treatment by passive systems. Source-control strategies require knowing recharge sources, flow paths, underground pool interconnections, and mine residence times. This paper describes the development of both conceptual and quantitative models of the mine system, based on mine and soil water budgets, an equivalent-porous-medium numerical model, a barometric efficiency model, and a chemical mixing model. The models were based on monthly water sampling, continuous mine-pool and discharge hydrographs, borehole logs, meteorological data and mine maps. The recharge rate is 20 cm/yr (13% of precipitation). Stream capture contributes 13% of the mine’s annual recharge, with diffuse recharge accounting for 87%. During intense rainfall events, however, 50% of recharge can occur by stream capture. Mine storage varies seasonally, depending on recharge, which in turn depends on not just precipitation but also evapotranspirative demand and soilmoisture storage. Consequently, mine storage and discharge are highest in the late spring and lowest in the late summer and early fall. The mine aquifer is a gently dipping grid of rooms and tunnels that collectively provide hydraulic resistance to flow, and it does not form a single hydrostatic pool. Assuming that mines are fully interconnected and that water is well mixed yields a residence time of 5.1 years. However, barometric pressure response shows that the eastern 40% of the mine is separate and partially confined, with exceptionally poor water quality. The eastern portion accounts for only 10% of the flow, but contributes 50% of the chemical load. Excluding the weakly-connected eastern 40%, residence time is 3.9 years. Barometric responses of heads in various parts of the mine show unconfined behavior, confined behavior, or “displacement” behavior, in which heads increase with barometric pressure.
A PRELIMINARY STUDY ON THE SPECIATION OF SELENIUM IN A WEST VIRGINIA WATERSHED
Authors:   Soil Science Division, Department of  Renewable Resources, University of Wyoming, Laramie, WY 82071, Vesper Dorothy J.
Published: February 2018

Abstract. The presence and chemistry of selenium (Se) has undergone considerable investigation in the western U.S. coal mining regions and in irrigated agricultural lands. Se is also present in West Virginia coals but its distribution and transport has received little attention to date. The recently completed Environmental Impact Statement (EIS) on Mountaintop Mining and Valley Fills (MTM/VF) reported Se in stream waters at concentrations up to 50 µg/L (USEPA, 1999). The streams with the elevated Se concentrations are located in watersheds impacted by MTM/VF in south-central West Virginia. Our ongoing work reviews the literature on Se in mine settings, and applicability of this largely western U.S. literature to the Appalachian geologic setting. This paper also reports our preliminary data for Se speciation in streams in southern West Virginia.