bluuebunny/crossref_metadata_2025 huggingface dataset:
Efek Model Pembelajaran Inkuiri Menggunakan Media Animasi Untuk Meningkatkan Hasil Belajar Siswa Di Sma Negeri 1 Namorambe
Authors: Patresya Helena , Manurung Sondang R.
Published: May 2019

ABSTRAK Penelitian ini bertujuan untuk mengetahui  efek model pembelajaran inkuiri menggunakan media animasi untuk meningkatkan hasil belajar siswa pada materi gerak lurus kelas X semseter I di SMA Negeri 1 Namorambe T.P 2015/2016. Jenis penelitian ini adalah quasi experiment. Populasi dalam penelitian  adalah seluruh siswa kelas X Semester I SMA Negeri 1 Namorambe yang terdiri dari 5 kelas berjumlah 162 orang. Pengambilan sampel dilakukan dengan teknik cluster random sampling dengan mengambil 2 kelas dari 5 kelas secara acak yaitu kelas X-4 sebagai kelas eksperimen dan kelas X-5 sebagai kelas kontrol. Kedua kelas berjumlah 60 orang. Instrumen yang digunakan untuk mengetahui hasil belajar siswa adalah tes hasil belajar dalam bentuk essai dengan jumlah soal 10 item yang telah divalidkan oleh validator. Berdasarkan hasil penelitian di kelas eksperimen diperoleh nilai rata-rata pretes sebesar 18,2 dan di kelas kontrol diperoleh nilai rata-rata sebesar 18,37. Hasil uji hipotesis menggunakan uji t diperoleh ada pengaruh yang signifikan dari efek model inkuiri terhadap hasil belajar siswa. Kata Kunci: quasi experiment, model pembelajaran inkuiri, konvensional,  hasil belajar
PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH TERHADAP HASIL BELAJAR SISWA SMA NEGERI 4 MEDAN T.P. 2014/2015
Authors: Hutabarat Andryani , Ginting Eva Marlina
Published: May 2019

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran berbasis masalah pada materi pokok Suhu dan Kalor di kelas X Semester II SMA Negeri 4 Medan T.P. 2014/2015. Jenis penelitian ini adalah quasi eksperimen. Populasi dalam penelitian adalah seluruh siswa kelas X Semester II SMA Negeri 4 Medan yang terdiri dari 11 kelas. Pengambilan sampel dilakukan dengan cara cluster random sampling dengan mengambil 2 kelas dari 11 kelas secara acak yaitu kelas X-11 yang berjumlah 31 siswa sebagai kelas eksperimen dan kelas X-10 yang berjumlah 37 sebagai kelas kontrol. Instrumen yang digunakan untuk mengetahui hasil belajar siswa adalah test hasil belajar dalam bentuk essay tes dengan jumlah 8 soal. Kelas eksperimen diberikan perlakuan dengan penerapan model pembelajaran berbasis masalah dan kelas kontrol dengan model pembelajaran konvensional. Berdasarkan hasil penelitian setelah dilakukan perlakuan menunjukkan bahwa terdapat perbedaan yang signifikan antara hasil belajar siswa dengan menggunakan model pembelajaran berbasis masalah dengan hasil belajar siswa dengan menggunakan pembelajaran konvensional. Kata Kunci : Pembelajaran Berbasis Masalah, Hasil Belajar, Aktifitas
PENGARUH MODEL PEMBELAJARAN INQUIRY TRAINING TERHADAP HASIL BELAJAR SISWA
Authors: Manurung David , Sirait Makmur
Published: May 2019

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran inquiry training terhadap hasil belajar siswa pada materi listrik dinamis. Jenis penelitian ini adalah quasi experiment dengan populasi seluruh siswa kelas X SMA Negeri 11 Medan yang berjumlah 8 kelas. Sampel penelitian ini terdiri dari 2 kelas yang ditentukan dengan teknik cluster random sampling, yaitu kelas X-8 sebanyak 40 orang sebagai kelas eksperimen dengan menggunakan model pembelajaran inquiry training dan kelas X-5 sebanyak 39 orang sebagai kelas kontrol dengan menggunakan pembelajaran konvensional. Setelah dilakukan perlakuan pada masing-masing kelas diperoleh rata-rata nilai postes pada kelas eksperimen sebesar 75,60 dan rata-rata postes kelas kontrol sebesar 62,18. Dari hasil pengamatan observer diperoleh rata-rata peningkatan aktivitas n-gain siswa cukup baik dari pertemuan I ke pertemuan II sebesar 0,58 dengan kategori sedang dan dari pertemuan II ke pertemuan III sebesar 0,86 dengan kategori tinggi. Dari hasil uji hipotesis diperoleh ada pengaruh yang signifikan model pembelajaran inquiry training terhadap hasil belajar siswa. Kata Kunci :Model Pembelajaran Inquiry Training, Pembelajaran Konvensional, Aktivitas, Hasil Belajar
PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE GROUP INVESTIGATION (GI) TERHADAP PENGETAHUAN KONSEPTUAL SISWASMA MUHAMMADIYAH 2 MEDAN T.P. 2015/2016
Authors: Siregar Evitamala , Harahap Mara Bangun
Published: May 2019

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe Group Investigation (GI) terhadap pengetahuan konseptual siswa pada materi pokok suhu dan kalor di kelas X semester II SMA Muhammadiyah 2 Medan T.P. 2015/2016.Jenis penelitian ini adalah penelitian quasi eksperimendengan menggunakan two group pretest-posttest design.Sampel penelitian terdiri dari dua kelas, yang masing-masing berjumlah 35 siswa, pengambilan sampel dilakukan dengan teknik cluster random sampling.Instrumen yang digunakan adalah tes hasil belajar berupa pengetahuan konseptual siswa dalam bentuk pilihan berganda sebanyak 15 soal. Berdasarkan hasil penelitian, diperoleh kesimpulan bahwa model pembelajaran kooperatif tipe GI memiliki pengaruh yang lebih baik terhadap hasil belajar pengetahuan konseptual siswa  daripada pembelajaran konvensional pada materi pokok Suhu dan Kalor di kelas X SMA Muhammadiyah 2 Medan T.P 2015/2016.   Kata Kunci: model pembelajaran kooperatif, group investigation (GI), pengetahuan konseptual, suhu dan kalor.
PENGARUH MODEL PEMBELAJARAN INKUIRI TERBIMBINGBERBANTUAN ANIMASI PhETTERHADAP AKTIVITAS DANHASIL BELAJAR SISWA PADA MATERI FLUIDA STATIS KELAS XISEMESTER IISMANEGERI 1 BATANG KUIS T.P 2015/2016
Authors: Lasmita Shinta Surya , Manurung Sondang R.
Published: May 2019

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh model Inkuiri Terbimbing berbantuan animasi PhET terhadap aktivitas dan hasil belajar siswa pada materi pokok Fluida Statis  di kelas XI semester II SMA Negeri 1 batang Kuis  T.P. 2015 / 2016.Jenis penelitian ini adalah quasi experiment dengan desain two group pre-test dan post-test, Pengambilan sampel dilakukan dengan cara cluster random sampling dengan mengambil dua kelas dari empat kelas yaitu kelas XI-IPA2 sebagai kelas eksperimen yang berjumlah 34 orang dan kelas XI-IPA3 sebagai kelas kontrol yang berjumlah 34 orang. Data penelitian diperoleh dengan menggunakan Instrumen tes hasil belajar berupa Essay test sebanyak 10 soal yang telah di validasi oleh validator serta uji ramalan. Data penelitian diperoleh dari tes hasil belajar, Lembar penilaian observasi untuk mengukur sikap, keterampilan dan aktivitas. Berdasarkan hasil penelitian di kelas eksperimen diperoleh rata-rata sikap, keterampilan dan aktivitas masing-masing dalam kategori baik dan juga di kelas kontrol rata-rata persentase perkembangan sikap dan aktivitas dalam kategori baik.Berdasarkan hasil penelitian diperoleh nilai rata-rata pretes kelas eksperimen adalah 25,82 dan kelas kontrol adalah 22,38. Setelah pembelajaran selesai diberikan postes dengan hasil rata-rata kelas eksperimen 79,05 dan kelas kontrol 72,08. Dari hasil uji t diperoleh thitung = 2,55 sedangkan ttabel = 1,67. Karena thitung> ttabel (2,55>1,67) maka Ho ditolak. Melalui uji t tersebut diperoleh hasil signifikan bahwa hasil belajar menggunakan model pembelajaran inkuiri terbimbing berbantuan animasi PhET lebih baik dibandingkan kelas kontrol yang menggunakan pembelajaran konvensional.   Kata kunci : model inkuiri terbimbing, hasil belajar, konvensional
PENERAPAN MODEL PEMBELAJARAN INKUIRI TERBIMBING TERHADAP HASIL BELAJAR SISWA DI SMA PANCA BUDI MEDAN
Authors: Rosita Rosita , Juliani Rita
Published: May 2019

Telah dilakukan penelitian untuk mengetahui hasil belajar siswa dengan menggunakan model pembelajaran inkuiri terbimbing. Jenis penelitian adalah  quasi eksperiment. Populasi penelitian seluruh siswa kelas X Semester genap SMA Panca Budi Medan terdiri dari empat kelas. Sampel penelitian dua kelas yang dilakukan dengan teknik cluster random sampling, kemudian diberikan perlakuan yang berbeda, kelas eksperimen dengan model pembelajaran inkuiri terbimbing dan kelas kontrol dengan pembelajaran konvensional. Data yang digunakan dalam penelitian adalah tes essay berjumlah 10 item yang telah divalidkan oleh validator.  Hasil penelitian diperoleh nilai rata-rata pretes kelas eksperimen adalah 37,03 standar deviasi 9,06 dan kelas kontrol adalah 33,59 standar deviasi 8,4. Analisis uji t menunjukkan bahwa nilai pretes kelas ekperimen dan kelas kontol mempunyai kemampuan awal yang sama.  Nilai rata-rata postes kelas eksperimen 67,5 standar deviasi 9,3 dan kelas kontrol 56,75 standar deviasi 8,7. Analisis uji t dapat disimpulkan ada perbedaan hasil belajar siswa akibat menerapkan model pembelajaran inkuiri terbimbing. Kata Kunci: quasi eksperimen, pembelajaran inkuiri terbimbing, konvensional.
PENGARUH MODEL PEMBELAJARAN LATIHAN INKUIRI TERHADAP HASIL BELAJAR SISWA PADA MATERI POKOK USAHA DAN ENERGI DI KELAS X SEMESTER II
Authors: Barus Eviyona L. , Sani Ridwan A.
Published: May 2019

Penelitian ini bertujuan untuk mengetahui hasil belajar siswa menggunakan model pembelajaran Latihan Inkuiri dan pembelajaran konvensional, serta mengetahui aktivitas belajar siswa menggunakan model pembelajaran Latihan Inkuiri. Jenis penelitian adalah quasi experiment. Instrumen yang digunakan dalam penelitian adalah tes pilihan berganda dengan jumlah soal 20 butir dan lembar aktivitas belajar. Kedua kelas yang menjadi penelitian adalah kelas eksperimen X MIA3 dan kelas kontrol X MIA1 yang berjumlah masing-masing 37 siswa. Hasil pretes kelas eksperimen sebelum diberi perlakuan sebesar 37.70 dan kelas kontrol 36.89. Penelitian diakukan dengan memberikan perlakuan yang berbeda. Kelas eksperimen menggunakan model pembelajaran latihan inkuiri sedangkan kelas kontrol menggunakan pembelajaran konvensional. Hasil postes kelas eksperimen mengalami peningkatan sebesar 73.24 dan kelas kontrol sebesar 70.94. Berdasarkan hasil observasi aktivitas siswa diketahui rata-rata aktivitas belajar siswa pada pertemuan I adalah 65,07%, pertemuan II adalah 70,23%, dan pertemuan III adalah 79,40%. Berdasarkan analisis dapat bahwa disimpulkan ada pengaruh model pembelajaran latihan inkuiri terhadap hasil belajar siswa pada materi pokok Usaha dan Energi di kelas X semester II SMA Swasta Katolik Budi Murni 2 Medan T.P. 2016/2017. Kata Kunci: latihan inkuiri, Hasil belajar, konvensional
PENGARUH STRATEGI PEMBELAJARAN KOOPERATIF DAN KREATIVITAS TERHADAP HASIL BELAJAR MATEMATIKA SISWA SMA SANTO YOSEPH MEDAN
Authors: Tampubolon Poltak Rianto
Published: May 2019

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh strategi pembelajaran dan kreativitas terhadap hasil belajar matematika. Penelitian ini dilakukan pada siswa kelas XI IPS SMA Santo Yoseph Medan. Teknik pengambilan sampel dilakukan dengan Cluster Random Sampling, dan diperoleh masing-masing terdiri dari 39 untuk kelas eksperimen dan 37 orang untuk kelas kontrol. Metode penelitian  yang digunakan adalah quasi eksperimen dengan faktorial 2 x 2. Teknik analisis yang digunakan adalah analisis varian dua jalur dengan taraf signifikansi α = 0,05, pengujian lanjut menggunakan Uji Scheffe. Hasil penelitian menunjukkan : (1) Hasil belajar matematika siswa yang diajarkan dengan strategi pembelajaran kooperatif Tipe Jigsaw lebih tinggi daripada siswa yang diajar dengan strategi pembelajaran kooperatif Tipe STAD, (2) Hasil hasil belajar matematika antara kelompok  dengan kreativitas tinggi berbeda dengan kreatifitas rendah pada taraf signifikansi α = 0,05, (3) Terdapat interaksi antara strategi pembelajaran dengan kreativitas terhadap hasil belajar. Semakin tepat strategi pembelajaran yang digunakan, maka semakin tinggi hasil belajar matematika siswa. Semakin tinggi kreativitas siswa semakin tinggi pencapaian kompetensi yang diperoleh siswa, interaksi antara strategi pembelajaran dan kreativitas akan memberikan dampak positif dalam meningkatkan hasil belajar matematika siswa. Kata kunci: Pembelajaran kooperatif, pembelajaran matematika, kreatifitas siswa
PENERAPAN PENDEKATAN KONSTRUKTIVISME DENGAN METODE BRAINSTORMING SEBAGAI UPAYA MENINGKATKAN HASIL BELAJAR SISWA
Authors: Rani Helvia Leonita Jamalum Purba,
Published: May 2019

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh metode brainstorming pada pendekatan konstruktivisme terhadap peningkatan hasil belajar siswa pada pokok bahasan laju reaksi siswa XI IPA SMA RK Serdang Murni Lubuk Pakam. Populasi dalam penelitian sebanyak 4 kelas. Sampel penelitian sebanyak 2 kelas diambil secara acak, satu kelas sebagai eksperimen 1 dan satu kelas sebagai eksperimen 2. Pembelajaran kelas eksperimen 1 dengan pendekatan konstruktivisme menggunakan metode brainstorming dan pembelajaran kelas eksperimen 2 dengan pendekatan konstruktivisme tanpa menggunakan metode brainstorming. Rata-rata peningkatan hasil belajar kelas eksperimen 1 sebesar 52 % dan rata-rata peningkatan hasil belajar kelas eksperimen 2 adalah 38 %. Uji  normalitas dan homogenitas sebagai prasyarat uji hipotesis, diperoleh hasil bahwa peningkatan hasil belajar siswa kelas eksperimen 1 dan siswa kelas eksperimen 2 dinyatakan  berdistribusi normal dan homogen. Data hasil penelitian menunjukkan bahwa peningkatan hasil belajar siswa yang diajarkan dengan metode brainstorming dan pendekatan konstruktivisme lebih besar dibandingkan dengan kelas yang diajarkan dengan pendekatan konstruktivisme tanpa brainstorming. Dengan selisih gain  sebesar 14% dan perbedaan peningkatan keaktifan belajar siswa  sebesar 11,98%. Kata kunci: Konstruktivisme, brainstorming, hasil belajar
Germany and Transformation Processes in Security: the Approach of Angela Merkel
Authors:   Institute of Europe, Russian Academy of Sciences, Sindeev Aleksey Aleksandrovich
Published: May 2019

The paper continues a series of studies on current approaches to transforming security in the Federal Republic of Germany. The novelty of the research is to systematize the views of A. Merkel on this prob-lem. The study identifies that the Chancellor seeks to slow down the pace of supranational security and defense reforms until the general principles of up-coming transformations are established and the consensus on the matter among most countries of the European Union is reached. All the speeches by A. Merkel from January 2018 to March 2019 are ana-lyzed. The author refrains from the theoretical analy-sis of the subject matter and practical advice since the approach of A. Merkel is one possible option, notwithstanding its official nature.
Security Factor in the EU Energy Policy Development
Authors:   St. Petersburg State University, Parakhulev Ivan Bogdanovich
Published: May 2019

The energy policy of the European Union has been actively developing for the past few years with an increased attention paid to the energy security. The need for security becomes crucial when it comes to crisis and current practices prove ineffective. The study discusses the impacts of the security factor on the development of energy policy, including the Energy Union. The goal of security in the energy sector substantiates a significant number of initia-tives in this regard. It is argued that the securitiza-tion of relationships, i.e. presenting an issue as a security threat, remains a mechanism that can be used to change the line of energy policy. At the same time, the EU energy policy evolution may min-imize such risks.
Political Strategies of Democratic Opposition in a Struggle Power in Modern Russia
Authors:   Ufa State Petroleum Technological University, Saetov Arslan Almazovich
Published: May 2019

The research deals with the strategy of democratic opposition parties as an actor of the political pro-cess in modern Russia based on the concepts of hybrid regimes, electoral authoritarianism, and de-fective democracy. The system-based, institutional approaches and the analysis of relevant literature are employed. In the author’s opinion, Russian demo-cratic opposition parties and movements can be classified as parliamentary parties (Fair Russia, Lib-eral Democratic Party of Russia, Communist Party of the Russian Federation), non-parliamentary regis-tered (Yabloko (Russian United Democratic Party), Civic Platform) and non-parliamentary unregistered parties (Russia of the Future). The research looks at their priorities for the development of society and the state being of particular relevance to modern political science and practice. The author concludes that, firstly, the strategies of democratic opposition parties depend, as a rule, on whether they are em-bedded in the system of power or not, whether they are parliamentary or not. Secondly, today, the main Russian political strategy of the democratic opposi-tion in a power struggle is to support Western politi-cal values and strategies, criticize the current gov-ernment, focus on decommunization, and strive to build a parliamentary state.
Criminal Law Counter to Inducement to Use Narcotic Drugs, Psychotropic Substances or Their Analogs
Authors:   University of Prosecutor’s Office of  the Russian Federation, Savinkov Anton Andreevich
Published: May 2019

The research deals with the responsibility for in-ducement to use narcotic drugs and summarizes modern case laws in relation to Article 230 of the Criminal Code of the Russian Federation (100 sen-tences handed down by the courts in 34 constituent entities of the Russian Federation, criminal proceed-ings in Moscow, Moscow and Kaluga regions), ex-pert opinion, and international practices. The author concludes that the characteristics of a victim, a crim-inal act, and a mental element of this crime are dif-ferently interpreted in scientific discourse and case laws. This is due to the lack of legislative elaboration of these characteristics. The research substantiates the need to fill the gaps in Article 230 in this regard. The author proposes the new wording of the above-mentioned characteristics. Information on the most common groups of purposes and motives of in-ducement to use narcotic drugs, psychotropic sub-stances or their analogs should be regarded as a basis for the typology of these crimes.
Preparation and Characterization of Acidic, Basic and Hydrophobic Dehydrated Carbons and their Capability for Methylene Blue Adsorption
Authors: El-Shafey El-Said , N.F. Ali Syeda , Al-Lawati Haider , Al-Busafi Saleh
Published: May 2019

Dehydrated carbon (DC) was prepared from date palm leaflets via sulfuric acid treatment. DC was functionalized via amide coupling using ethylene diamine (EDA) and propylene diamine (PDA) to produce basic dehydrated carbons (BDCs): BDC-EDA and BDC-PDA, respectively, and using ethylamine (EA) and aniline (AN) to produce hydrophobic dehydrated carbons (HDCs): HDC-EA and HDC-AN, respectively. Surface  areas were found low, between 6.7-16 m2/g with mesoporosity domination. FTIR shows that –COOH content on DC almost disappeared after surface functionalization. Faster adsorption of methylene blue with larger adsorption capacity was found on HDC-EA than other adsorbents because of stronger hydrophobic interaction forces.
Fortification of Damaged Asphalt Pavements with Cement Concrete Slabs Reinforced with Next-Gen Bars – Part I: Laboratory Study
Authors: Radziszewski Piotr , Jackiewicz-Rek Wioletta , Sarnowski Michał , Urbański Marek
Published: May 2019

Over the course of operation, asphalt road pavements are subjected to damage from car traffic loads and environmental factors. One of the possible methods of strengthening damaged asphalt pavements may be the application of an additional rigid layer in the form of a cement concrete slab with continuous reinforcement.

This paper presents a material-technological and structural solution for composite pavement where a cement concrete slab with continuous HFRP bar reinforcement is used for strengthening. Based on laboratory tests, the serviceability of composite bar reinforcement of rigid pavement slabs was shown. A design for strengthening asphalt pavement with a concrete slab with steel bar and corresponding HFRP bar reinforcement was developed. The composition of a pavement cement concrete mix was designed, and experimental sections were formed. Based on laboratory tests of samples collected from the surfaces of experimental sections and the diagnostic tests carried out in “in situ” conditions, the authors will try, in the nearest future (Part II: In situ observations and tests), to confirm the effectiveness of strengthening asphalt pavements with cement concrete slabs with HFRP components.
Analysis of Contractor’s Selection Criteria in Railway Projects
Authors: Leśniak A. , Janowiec F.
Published: May 2019

Particular diligence in the preparation of documentation and conducting a tender procedure for construction works must be made by public contracting entities, who are subject to additional restrictions. In Poland, the largest public contracting entities are the sectoral ones. These are the entities (defined in Art. 3 of the Public Procurement Law Act) operating in the sectors of water management, energy, transport and postal services. The paper presents the analysis of tender offers for the execution of construction works or design and execution of construction works related to the reconstruction, construction and revitalization of railway lines, announced after the amendment to the Public Procurement Law on June 22, 2016. The considered examples are selected tender procedures covering the scope of construction and assembly works on railway lines throughout the country. The authors paid particular attention to the tender criteria applied and the requirements for the potential contractors for works in the field of railway infrastructure
Study of the curative role of “Draas” in evacuating dunes threatening roads in the Lower Algerian Sahara: physical model on a smaller scale
Authors: Sebaa A. K. , Belhamra M.
Published: May 2019

Sand drifting on road networks in the region of the Lower Algerian Sahara is one of the main problems for the sector. Machines are repeatedly deployed to overcome this phenomenon. The long experience acquired while dealing with the removal of sand from roads pushed us to focus on obstacles called “Draas”. The purpose of this study is to perform an optimization of these special protective structures called “Draas”, using a reduced physical model. Model tests were performed in flow channel. The principle of modeling the wind transport using a reduced model is to simulate the wind using a liquid stream while respecting the laws of hydraulic and sedimentological similarity. The results obtained are extrapolated to make a normal size prototype.
Theoretical Analytical Solution of Deformation and Stress Distribution of Underground Gas Storage Cavern in Bedded Salt Rock
Authors: Xie P. , Wen H.J. , Wang G.J. , Hu J.
Published: May 2019

The main purpose of the study is to investigate the mechanical properties around an underground gas storage cavern in bedded salt rock. Firstly, considering the characteristics of the salt rock formation in China, the mechanical model was simplified into a hollow cylinder, which containing non-salt interlayer. In terms of elastic theory, Love displacement function was developed, and the elastic general solution of stress and deformation components were obtained after determining the undetermined coefficients. Under the same condition, numerical simulation was carried out. The validity of the elastic general solution is verified by comparing to numerical simulation results. Furthermore, Based on the feasible general elastic solution, viscoelastic solution was obtained through Laplace transformation and inverse Laplace transform, which could provide reference for the study on the stability and tightness of underground gas storage carven during operation to some extent.
Choosing a Proper Method for Strengthening WPC Beams with Grooving Method Using Swara-Edas
Authors: Chini Mahdi , Arefi Shahin Lale , Zolfani Sarfaraz Hashemkhani , Ustinovicius Leonas
Published: May 2019

Wood plastic composite (WPC) is a lightweight material, resistant against corrosion and damage, with recyclability of consuming materials. These materials usually used in marine structures frequently due to their unique features. In order to strengthen beams made by this material, usually Fibre-reinforced plastic (FRP) sheets are used, and one of the fracture modes in these beams is debonding of FRP sheet from the surface of the beams. To deal with this problem some grooves are used in the surface of the beam to improve the contact surface. The grooves include longitudinal, transverse and diagonal grooves. The main goal of this study is to assess different grooving methods in WPC-FRP beams. In this regard, primarily criteria (improving resistance, performance speed, performance complexity, performance costs, displacement and absorbing energy) were determined through interviews with experts in this field in order to assess the beams. Then, SWARA method employed to evaluate criteria with a policy based perspective and finally EDAS method applied for evaluating related alternatives. Based on obtained results, the longitudinal groove method is the best way of strengthening WPC beams to prevent debonding.
DIC in Validation of Boundary Conditions of Numerical Model of Reinforced Concrete Beams Under Torsion
Authors: Turoń B. , Ziaja D. , Buda-Ożóg L. , Miller B.
Published: May 2019

The paper presents the experimental research and numerical simulations of reinforced concrete beams under torsional load. In the experimental tests Digital Image Correlation System (DIC System) Q-450 were used. DIC is a non-contact full-field image analysis method, based on grey value digital images that can determine displacements and strains of an object under load. Numerical simulations of the investigated beams were performed by using the ATENA 3D – Studio program. Creation of numerical models of reinforced concrete elements under torsion was complicated due to difficulties in modelling of real boundary conditions of these elements. The experimental research using DIC can be extremely useful in creating correct numerical models of investigated elements. High accuracy and a wide spectrum of results obtained from experimental tests allow for the modification of the boundary conditions assumed in the numerical model, so that these conditions correspond to the real fixing of the element during the tests.
Influence of Cable Length on the Vibrating Wire Sensors Dynamic Measurements
Authors: Cieplok G. , Karwowski W. , Bednarski Ł.
Published: May 2019

The hereby paper discusses the influence of cable length on the SHM systems with the use of vibrating wire dynamic measurements. Vibrating wire sensors are mainly used for measuring stable or slowly changing strains, e.g. system installed on Rędziński Bridge in Wroclaw. From some time applications of these sensors for measuring dynamic deformations are becoming popular. Such tests were conducted on STS Fryderyk Chopin. New solutions generate new problems. In this case: the operational stability of systems exciting wire vibrations. The structure of such sensors and the electric cables length has an essential influence on their operations, what is undertaken in the paper. The subject of investigations constitutes the measuring system based on self-exciting impulse exciter, for which impedance parameters of electric cables and of the vibrating wire sensor were the most essential. The mathematical model of the system, experimental verification of the model as well as the results of theoretical analyses at the application of electric cables of various lengths are presented in the paper.
Thermal Actions on the Materials During Deck and Pavement Construction
Authors: Chmielewska B. , Garbacz A. , Adamczewski G. , Rymsza B.
Published: May 2019

The article presents the results of the research on thermal actions on the materials occurring in the cross section along the depth of the bridge deck and bituminous pavement during its construction. The impulse to curried out the research was the need to explain the causes of the blistering of bituminous waterproofing membranes and asphalt pavements often observed on the bridge decks. The paper presents the examples of such failures and the analyses of possible mechanisms of the phenomenon. Research indicates a significant influence of all technological processes on the temperature of materials in the cross section as well as daily temperature changes. The probability of initiation of reactions between concrete components with gaseous products has been confirmed in such conditions. The susceptibility of bituminous materials to gas emission and blistering is the subject of a separate study. The research was part of a research project carried out under the contract INNOTECHK3/IN3/50/229332 /NCBR /14 [13].
The Impact of the Magnitude of Overhead Costs on the Difference Between ABC and TDABC Systems
Authors: Tarzibashi Omar Fikrat Fateh , Ozyapici Hasan
Published: May 2019

The objective of this study is to investigate the impact of the magnitude of overhead costs on the results of ABC and TDABC differences. A quantitative research method was used and data were gathered through an extensive literature review. A total of 170 articles that included both ABC and TDABC were found and 37 were used because only 37 articles included both the application of the systems and the comparison of the results of the systems. Correlation analysis and regression analysis were used to test whether there is a relationship between overhead costs and the differences in the results of ABC and TDABC systems. The results indicated that there is a statistically significant relationship between the total amount of overhead cost and the differences in the results of ABC and TDABC systems. Accordingly, when the overhead costs are increased, the TDABC system produces more different results than ABC. Based on this finding, the practical implication of this study seems to portray that companies with high overhead costs using the TDABC system rather than the ABC have the advantage of ascertaining product costing differently, which are more accurate.
A critical reflection on improving effective team communication
Authors: Yang Hua
Published: May 2019

Objective

This paper aims at critically reflecting on the author’s personal experience in the context of communication within a nursing team and exploring relevant existing constraints with a view to improving practice and achieving more effective outcomes in team communication.

Methods

Critical emancipatory reflection is used to evaluate and interpret the author’s practice. Smyth’s model serves as a framework to guide critical reflection step by step in this paper. Relevant theoretical perspectives help to make sense of the author’s performance in terms of team communication.

Results

It is identified via emancipatory reflection that the author endorses the ideas of equality, respect, trust, and collaboration, which were formed and established during the process of professional socialization. However, different constraints, such as sociocultural, historical, political, and personal factors, impede the author from performing more effectively in terms of team communication. Reconstruction provides the author opportunities to take actions to rectify constraints and avoid the reemergence of previous situations in the future.

Conclusions

Reflection is an effective way to gather knowledge and develop comprehensive understanding of practice. Alternative actions for effective team communication are recommended, including formulating ground rules for discussion, guiding nurses in the correct way, transforming conflicts within a team, being an active and reflective listener, and motivating nurses to actively create.
Self-esteem enhancement as a strategy for promoting the mental health and averting the occupational problems of nurses
Authors: He Ling , Ma Yu-Feng , Zhang Ke-Sen , Wang Ya-Xing
Published: May 2019

In recent years, shortage of nurses, high turnover rate, low self-worth, and team instability have become increasingly serious. With the development of positive psychology, more and more nursing managers have begun to attach great importance to the mental health of nurses. Self-esteem, as one of the core indicators of individual mental health, has received extensive attention from researchers in different fields since its inception. This paper reviews and summarizes the research status and development trends of nurses’ self-esteem considering the aspects of self-esteem as a concept, assessment tools, significance, and intervention methods. At the same time, it also puts forward problems that need to be solved by undertaking research into nurses’ self-esteem, in order to provide a reference for further studies on nurses’ self-esteem.
Eosinophilic pancreatitis versus pancreatitis associated with eosinophilic gastroenteritis – a systematic review regarding clinical features and diagnosis
Authors: Pinte Larisa , Băicuș Cristian
Published: May 2019

Background. Over the past years, eosinophil infiltration involving the gastrointestinal tract and pancreas leading to eosinophilic pancreatitis, eosinophilic gastroenteritis and hypereosinophilic syndrome has been reported in the literature.

We aimed to analyze and compare the features involving patients with eosinophilic pancreatitis and pancreatitis associated with eosinophilic gastroenteritis and to determine if there is a connection between the two disorders or if they in fact meet the diagnostic criteria for hypereosinophilic syndrome.

Material and methods. The following search was performed in March 2019 on PubMed (MEDLINE) database using the medical terms “pancreatitis”, “eosinophilic pancreatitis”, “eosinophilic gastroenteritis” and “hypereosinophilic syndrome”.

Results. The search revealed 119 publications from 1970 onwards. A total of 83 papers were excluded, and the remaining 36 publications, consisting in case reports and case series, were analyzed. From 45 patients, 20 subjects with eosinophilic gastroenteritis developed pancreatitis, 20/45 had eosinophilic pancreatitis, and 5/45 hypereosinophilic syndrome involving the pancreas. There was no significant difference regarding clinical, laboratory and imaging features between the three groups, despite the multiple theories that explain the association of pancreatic and gastrointestinal eosinophilic infiltration. Although there was a strong resemblance between the three groups, histological evidence of eosinophilic gastrointestinal infiltration guided the treatment towards a less invasive way, while subjects with eosinophilic pancreatitis underwent pancreatic surgery to exclude potentially malignant lesions.

Conclusion. Although there are various theories that explain pancreatitis development in patients with eosinophilic gastroenteritis, hypereosinophilia diagnostic work-up should be taken into account in all patients with high number of blood eosinophils, even in those with eosinophilic pancreatitis in order to establish the diagnosis using a minimally invasive approach and to apply an adequate treatment.
Self-Efficacy Development among Students Enrolled in an Engineering Service-Learning Section
Authors: Dent Lauren , Maloney Patricia , Karp Tanja
Published: May 2019

Service-learning presents exciting new ways for students to enhance their learning.  Educators and scholars agree that service-learning is connected to self-efficacy, which affects student performance.  This research tests the development of self-efficacy in students enrolled in service-learning and traditional sections of a first-year engineering course. Using a previously developed metric, the Engineering Skills Assessment (ESA), students enrolled in service-learning (SL) and “traditional” (non-SL) sections quantified self-efficacy on 11 skills previously deemed important for engineering.  Student responses were compared between SL and non-SL students at the beginning and end of the semester.  Analysis of the collected data using exploratory factor analysis (EFA) grouped self-efficacy ratings for the 11 skills into three meaningful constructs: (1) Job-related skills (2) Interpersonal skills and (3) Life skills.  Mean self-efficacy scores were significantly better at the end of the course for non-SL students in all areas and for SL students in four of the 11 skills and two of the three constructs.  Self-efficacy growth was significantly higher for non-SL students, which may be due to the Dunning-Kruger effect.  However, similar percentages of both populations self-reported that their skills were improved at the end of the semester due to the class.  This research also supports the use of the ESA as a reliable psychometric tool to evaluate student self-efficacy and its relationship to service-learning.
Effects of Service Projects on the Perceived Skills of Engineering Technology Students
Authors: Appiah-Kubi Philip , Brion Corinne
Published: May 2019

Client based service projects offer many advantages to instructors, students and host communities. However, instructors must carefully choose the projects in order to achieve the benefits that come with this pedagogical tool. The purpose of this research was to investigate the perception of engineering technology students on how different service projects influence performance and perceived skills. A modified perceived skill model was used to measure the perceived effect of the team based service projects on: motivation to learn, contribution to research knowledge, skills and personal benefit, and project as a learning device. The projects were either client based or non-client based. In addition, they were categorized as either engineering, non-engineering, or some engineering projects. The non-engineering were the projects with no engineering content, whereas those with some form of engineering content were classified as some engineering. From the results, it appears that all the project types and categories were highly perceived by the students as contributing to their perceived skills. They were also highly perceived as great learning tools. Additionally, the projects with engineering content (client based and non-client based) provided a significantly higher perceived motivation to learn. However, there was no significant difference in the exam performance.
Case Report: Type 1 aortic dissection presenting as acute pericarditis: the roles of POCUS and transthoracic echocardiography
Authors: Ayach, MD, PhD Bill , Dhansay, MD Aadil , Morris, MD Andrew , Tam, MD James W. , Jassal, MD Davinder S.
Published: May 2019

Clinical Presentation: A 59 year old male presented with a 1 day history of non-exertional chest pain that was pleuritic in nature and aggravated by lying flat. His chest pain symptoms were preceded by a one week history of “flu-like” symptoms. Physical exam demonstrated a blood pressure of 114/55 mmHg, heart rate of 75 bpm, and a normal oxygen saturation on room air. Cardiac examination revealed a biphasic pericardial rub vs. to-and-fro murmur. EKG demonstrated diffused ST-elevation and PR depression consistent with acute pericarditis. Laboratory findings revealed a normal WBC of 11.2×109/L and hsTnT of 78 ng/L. Imaging Findings: A point of care ultrasound (POCUS) assessment demonstrated mild aortic insufficiency with a dilated ascending aorta with no pericardial effusion or wall motion abnormalities. An expedited transthoracic echocardiography (TTE) confirmed a bicuspid aortic valve with moderate aortic insufficiency. The aortic root and ascending aorta were dilated at 50 and 52 mm, respectively. There was evidence of an aortic dissection flap prolapsing across the left ventricular outflow tract. A dissection flap was also visualized within the abdominal aorta consistent with a Type 1 aortic dissection. Computed tomography of the aorta confirmed the Type 1 aortic dissection and the patient underwent an urgent valve-sparing aortic root replacement procedure. Discussion Points: Despite a typical clinical presentation for acute pericarditis, any unexpected physical exam or laboratory findings should lead to a POCUS assessment. This case demonstrates a rare presentation of aortic dissection which could have been easily missed without a POCUS assessment. Here we propose an algorithm for a POCUS examination in setting of pleuritic chest pain consistent with pericarditis.
Türkiye'de Sigara Bağımlılığını Azaltmada Sigara Vergilerinin Etkisi
Authors: HIZARCI BEŞER Berna , AŞKAN Hatice
Published: May 2019

Son zamanlarda sigara tüketiminin azaltılması ve sigara bağımlılığı ile mücadele edilmesi konusu daha da önemli hale gelmiştir. Sigara kullanımının yaydığı olumsuz dışsallıklar nedeniyle sigara bağımlılığının azaltılmasına ilişkin düzenlemelere rağmen sigara tüketim miktarı giderek artmaktadır. Ulusal Tütün Kontrol Programında sigara tüketiminin engellenmesinde bir araç olarak vergilerin arttırılması politikası benimsenmiştir. Türkiye'de ÖTV gelirinin dörtte biri gibi büyük bir oranı tütün ürünlerinden elde edilmektedir. Bu çalışmada sigara bağımlılığı ile mücadele edilmesinin önemi üzerinde durulmuş ve tütün kullanımının azaltılmasında vergi oranlarının artırılmasının yanı sıra bağımlılıkla mücadelede edilmesinin gerekliliği vurgulanmıştır. Bu noktada hükümetlerin sigara vergi yapısında değişiklikler yapmanın yanı sıra sigara içenlere yardım etmesi gerekliliği ön plana çıkmaktadır. Özellikle sağlık hizmetlerinde devletin ekonomide denetleyici ve düzenleyici rolüne olan ihtiyaç giderek artmaktadır.
Application of Radial Basis Function (RBF) neural networks to estimate oil field drilling fluid density at elevated pressures and temperatures
Authors: Rahmati Abdol Samad , Tatar Afshin
Published: May 2019

The petroleum industry today has no choice, but to explore new and ever more deep and challenging pay zones as the most of the shallow oil and gas producing pay zones are severely depleted during the years of production. For improved drilling fluid performance in deep and hostile environment wells, accurate knowledge about the fluid density at high temperature and pressure conditions is an essential step. To achieve this mission, this study is aiming at developing a new computer-based tool is designed and applied for accurate calculation of drilling fluid density at HPHT conditions. In order to seek the comprehensiveness of the developed tool, four different kinds of fluids including water based, oil based, Colloidal Gas Aphron (CGA) based and also synthetic fluids are selected for modeling purpose. Radial Basis Function (RBF) network is considered as the modeling network. The results calculatedviathe proposed algorithm are compared to data reported in the literature. To make a judgment based on various statistical quality measures, it is concluded that the developed tool is reliable and efficient for density calculations of various fluids at extreme conditions.
Tobolsk’s crockery at the end of the 16th–17th centuries: experience of classification
Authors: Balyunov I. V.
Published: May 2019

Purpose. Fragments of clay vessels are the most massive findings from the cultural layer of the town of Tobolsk. The development of classification is the main task of the research of Tobolsk’s crockery with using statistical and comparative analyzes.
Results. The classification of ceramic’s crockery at the ending of the 16th –17th centuries has a most importance for studying the archaeological materials of Russian settlements in Siberia. Their volumes have already reached immense sizes, but many questions of chronology and systematization remain unresolved. For solve this problem necessary to determinate the archaeological objects of the Russian population, where standing out the complexes of findings are reliably dated by a narrow period of time. At the end of the 16th –17th centuries objects are Lozvinsky Gorodok, Mangazeya, Berezovo, Albazinsky Ostrog characterized that period. In Tobolsk, during archaeological works, was singled out a cultural layer at the ending of the 16th –17th centuries, where the most massive findings are fragments of ceramic crockery. For create a classification of this collection necessary to learn experience of studying the materials of the other objects in Siberia. The most importance is using the system of statistical registration of ceramics from the epoch of the Russian Middle Ages, developed by V. Yu. Koval. Learning of Tobolsk crockery at the ending of the 16th –
17th centuries allows to distinguish the following forms of ceramic vessels: pots (a separate category of pots with plums), wash basins, bowls, frying pans, inkwells. Possibly to designate separately single findings of small pots, cups. The systematization forms of the upper parts of the pots allows to distinguish four types, each of them is divided in two variants. The main part of the crockery are made with the use of restorative roasting, it is defined as gray-brown. Better quality dark-gray glazed dishes (represented by single samples) can be defined as imported products.
Conclusion. Previously, the local pottery production was formed under the influence of handicraft traditions that had emerged in the central part of the country. Tobolsk’s crockery at the ending of the 16th –17th centuries has many similarities with ceramics was found in the territory of the other Russian settlements in Siberia. Differences are also observed in the technology of production, in the character of the processing surface of crockery and others. We can do the conclusion that for each site there is a special ceramic complex, which requires detailed learning and systematization.
Changbin culture on Taiwan: history of investigations and basic characteristics
Authors: Derevianko A. P. , Azarenko Yu. A. , Komissarov S. A.
Published: May 2019

Purpose. The paper describes the most ancient archaeological culture of Taiwan and its significance for the reconstruction of the early stage of the human society’s development in the region.
Results. Changbin, the culture of the Late Paleolithic Age, named after Changbin Township in Taidong County on the eastern coast of the island and its southern extremities where it was discovered. Excavations of the primary site, Baxiandong (Baxian caves; or Pahsientung), started in 1968, with new findings being made nowadays. The Baxian sea-cave samples were tested with radiocarbon measurement to have been dated from 15 to 5 thousand years ago, making earlier dates (around 50,000 years ago) debatable. The bulk of artifacts found includes chipped stone and bone tools, mainly of them are flint scrapers, sharp-edged flake tools, pebble chopping tools, shell scrapers and also tools made of bone, such as wedges, stitching awls and fish hooks. The ancient people, who lived in the caves, hunted, fished and gathered seafood on the coast. Typlogically, the Changbin tools are similar to the Hoabinhian industry. It is possible that Changbinhians came to Taiwan from the Southeast China, but also probably from the Phillipines. At its late stage, the Changbin culture overlaps with the Neolithic Dabenkeng culture (about 5000–2500 years BC), but there is no evidence to any contacts between them.
Conclusion. Changbin Culture is extremely important for the understanding of the origin of the first settlements in prehistorical Taiwan. Farther research can bring new results in revealing the features of anthropogenesis on the territory of the Eastern Asia. Detailed reconstruction of the stages of development of this territory, with special attention to the initial settlement of Taiwan, is necessary to understand the basic characteristics of the cultural evolution of the early cultures in the region and can help solve the problem of the spread of a modern anthropological type in ecumene, make possible the identifying the ways of ancient migrations in the Asia-Pacific region. The initial period of studies of Baxian caves made possible to formulate the tasks for the new search, the answers to which will be received within the next stage of the archaeological works, having begun about 10 years ago.