bluuebunny/crossref_metadata_2025 huggingface dataset:
PENERAPAN MODEL PEMBELAJARAN BERBASIS MASALAH BERBANTUAN MIND MAP UNTUK HASIL BELAJAR FISIKA SISWA DI SMA NEGERI 3 BINJAI
Authors: Rianita Rahima , Juliani Rita
Published: May 2019

Penelitian bertujuan mengetahui hasil belajar fisika dengan penerapan model pembelajaran berbasis masalah berbantuan mind map. Jenis penelitian adalah quasi experiment, dengan teknik pengambilan sampel secara cluster random sampling. Sampel penelitian untuk kelas eksperimen adalah siswa kelas XI-IPA 4 dan kelas XI-IPA 5 sebagai kelas kontrol, masing-masing berjumlah 32 siswa. Instrumen yang digunakan dalam penelitian adalah tes essay dengan jumlah 10 soal yang telah divalidasi, serta lembar aktivitas siswa. Hasil penelitian diperoleh rata-rata pre-test kelas eksperimen 38,8 dengan standar deviasi 9,6 dilakukan uji normalitas dan diperoleh data berdistribusi normal. Data pre-test kelas kontrol 35,1 dengan standar deviasi 9,9 dilakukan uji normalitas diperoleh data berdistribusi normal kemudian kedua data pre-test dilakukan uji homogenitas dengan uji varians diperoleh data bersifat homogen selanjutnya setelah kedua data bersifat normal dan homogen dilakukan uji t dua pihak dengan hasil kedua kelas memiliki kemampuan awal yang sama sehingga dapat di jadikan sebagai sampel. Kedua sampel diberikan perlakuan berbeda diperoleh hasil rata-rata post-test kelas eksperimen 67,5  dengan standar deviasi 8,8 dilakukan uji normalitas diperoleh data berdistribusi normal. Data post-test kelas konvensional 54,6 dengan standar deviasi 8,6 diperoleh data berdistribusi normal kemudian kedua data post-test dilakukan uji homogenitas dengan uji varians diperoleh data bersifat homogen selanjutnya data yang telah normal dan homogen kedua kelas dilakukan uji t satu pihak dapat disimpulkan ada perbedaan akibat penerapan  model  pembelajaran  berbasis  masalah  terhadap  hasil  belajar siswa pada materi hukum Newton tentang gerak dan gravitasi. Kata Kunci: pembelajaran berbasis masalah, konvensional, mind map, quasi experiment
ANALISIS PENGARUH PENGUMUMAN STOCK BUYBACK TERHADAP HARGA SAHAM DAN RETURN SAHAM PADA PERUSAHAAN YANG TERDAFTAR DI BURSA EFEK INDONESIA TAHUN 2011-2016
Authors: Hasibuan Ainul Husna , Chalil Syahrizal
Published: May 2019

AbstrakPenelitian ini berupa penelitian deskriptif kuantitatif dengan pendekatan event study. Populasi dari penelitian ini adalah seluruh perusahaan yang terdaftar di Bursa Efek Indonesia yang melakukan stock buyback tahun 2011-2016. Sampel yang digunakan sebanyak 66 perusahaan yang terdaftar di BEI yang diambil dengan menggunakan metode purposive sampling. Hasil penelitian menunjukkan harga saham dan return saham sebelum pengumuman stock buyback lebih rendah dari sesudah pengumuman stock buyback. Hal tersebut menunjukkan bahwa informasi pengumuman stock buyback direspon secara positif oleh investor. Dengan demikian, dapat disimpulkan bahwa pengumuman stock buyback berpengaruh terhadap harga saham dan return saham perusahaan yang terdaftar di Bursa Efek Indonesia 2011-2016. Kata Kunci : Stock Buyback, Harga Saham, Return Saham AbstractThis research is descriptive quantitative research with the event study approach. The population of this study are all companies listed in Indonesia Stock Exchange that the stock-buyback year 2011-2016. The samples used were 66 companies listed on the Stock Exchange are taken by using purposive sampling method. The results showed stock prices and stock returns before the announcement of a stock buyback is lower than after the announcement of a stock buyback. It shows that the stock buyback announcement information responded positively by investors. Thus, it can be concluded that the announcement of a stock buyback effect on stock prices and stock returns of companies listed on the Indonesia Stock Exchange 2011-2016. Keyword : Stock Buyback, Stock Price, Stock Return
PENGARUH PROMOSI JABATAN DAN MOTIVASI KERJA KARYAWAN TERHADAP KINERJA KARYAWAN PADA PT PLN (PERSERO) WILAYAH SUMUT
Authors: Nurasnita Nurasnita , Harahap Lokot Muda
Published: May 2019

AbstrakPenelitian ini bertujuan untuk mengetahui dan menjelaskan pengaruh promosi jabatan terhadap motivasi kerja karyawan, pengaruh promosi jabatan terhadap kinerja karyawan, dan pengaruh motivasi kerja karyawan terhadap kinerja karyawan pada PT. PLN (Persero) Wilayah Sumut. Data yang digunakan dalam penelitian ini adalah data promosi jabatan, motivasi kerja karyawan, dan kinerja karyawan. Jumlah populasi dalam sampel ini adalah karyawan PT PLN (Persero) Wilayah Sumut sebanyak 173 orang, dan sampel yang diambil dalam penelitian ini adalah 173 responden, dengan teknik pengambilan sampel adalah total sampling. Dengan demikian hipotesis dalam penelitian ini diterima yaitu terdapat pengaruh Promosi Jabatan terhadap Motivasi Kerja Karyawan, terdapat pengaruh Promosi Jabatan terhadap kinerja karyawan, terdapat pengaruh Motivasi Kerja Karyawan terhadap kinerja karyawan. Kata kunci : Promosi Jabatan, Motivasi Kerja,, Kinerja Karyawan AbstractThis study aims to identify and explain the effect of job promotion on work motivation, the effect of job promotion on employees performance, and the effect of work motivation to employees performance at PT. PLN (Persero) Wilayah Sumut. Data in this research are data of job promotion, work motivation, and employee performance. The population used in this study is employee of PT PLN (Persero) Wilayah Sumut was 173 person, with used total sampling. The hypothesis in this study is accept that there are effect of job promotion on work morivation, there is the influence of job promotion on employees performance, there is the influence of work motivation on employees performance. Keywords: Job Promotion, Work Motivation, Employee Performance
PENGARUH LEVERAGE DAN PERPUTARAN MODAL KERJA TERHADAP PROFITABILITAS PERUSAHAAN SUB SEKTOR OTOMOTIF DAN KOMPONEN YANG TERDAFTAR DI BURSA EFEK INDONESIA TAHUN 2011-2015
Authors: Angelita Angelita , Sihombing Humisar
Published: May 2019

AbstrakPenelitian ini dilakukan untuk menjelaskan beberapa faktor yang diduga berpengaruh terhadap profitabilitas diantaranya pemanfaatan leverage dan perputaran modal kerja. Populasi penelitian sebanyak 13 perusahaan dan sampel yang diteliti sebanyak 12 perusahaan. Teknik analisis yang digunakan dalam penelitian ini adalah deskriptif kuantitatif menggunakan analisis jalur dengan hasil persamaan X2= 0,335 X1 + 0,938, X3 = -0,440 X1 + 0,038 X2 + 0,900. Uji hipotesis menunjukkan hasil koefisien jalur leverage terhadap perputaran modal kerja sebesar 0,335 pada taraf signifikan 0,009, leverage terhadap profitabilitas sebesar –0,440 pada taraf signifikansi 0,001 dan perputaran modal kerja terhadap profitabilitas sebesar 0,038 pada taraf signifikan 0,764. Hasil penelitian menunjukkan bahwa terdapat pengaruh leverage terhadap perputaran modal kerja, terdapat pengaruh leverage terhadap profitabilitas, terdapat pengaruh perputaran modal kerja terhadap profitabilitas. Kata kunci : Leverage, Perputaran Modal Kerja, Profitabilitas. AbstractThis research is conducted to explain some factors that allegedly have an effect on to profitability such as utilization of leverage and working capital turnover. Population used in this research is 13 companies and the sample that use in this research is 12 companies. The analysis technique used in this research is descriptive quantitative by using path analysis with the result of equation X2 = 0,335 X1 + 0,938, X3 = -0,440 X1 + 0,038 X2 + 0,900. Hypothesis test shows the result of coefficient of leverage path to working capital turnover is 0,335 at significant level 0,009, leverage to profitability is -0,440 at significance level 0,001 and work capital turnover to profitability  is  0,038 at significant level 0,764. The result of research indicate that there is influenced of leverage to working capital turnover, there is influenced of leverage to profitability, there influenced of working capital turnover to profitability. Keywords: Leverage, Working Capital Turnover, and Profitability
PENGEMASAN TARI GUEL DALAM BENTUK KARTU POS SEBAGAI MEDIA PEMBELAJARAN
Authors: Bengi Suciati Simah , Heniwaty Yusnizar , Adlin Dilinar
Published: May 2019

Abstract-This study discusses Guel dance learning media created in the form of postcards. Aims to be able to direct students in identifying, appreciating, and expressing dances of the Gayo area, especially Guel dance. Theories used in the research of packaging theory according to Cahyorini and Rusfian (2011: 28), theory of learning media according to Heinich in Susilana (2016: 06), and graphic media theory according to Susilana and Riyana (2016: 14) Packaging is a theory used for graphic design, in terms of producing the product, and the image media in the form of postcards used to make Guel dance material as a learning medium. The time of the study was conducted from August to October 2017. The research site was at Sanggar Renggali Jalan Merah Mege Hakim Bale Bujang Laut Tawar, Central Aceh District. The population of several artists Gayo and all members of Sanggar Renggali because learning Guel dance is a dance learning materials in schools in Takengon and Samples are 2 people Gayo artists and 2 dancers dance Guel. Data collection techniques include observation, interview, literature study, and documentation, and then analyzed by qualitative descriptive method. Based on research that has been done Guel dance is a tradition dance Gayo community that has been used as learning materials in the schools of Middle Secondary in Central Aceh district. Guel dance which is packed in the form of postcards as a medium of learning with menggunkana first step of planning is preparing the material, determining the location, selection of dancers, and prepare the facilities and infrastructure. The second step of implementation is taking photos, editing process, then the last step is the completion of postcards and final writing. And produces packaging of learning media of Guel dance that is in the form of postcard.  Keywords: Packaging, Guel Dance, Postcard Media
ETIKA DAN ESTETIKA MEUDIKEE ANGGOK DI DAYAH DARUL HUDA DESA BAYI KECAMATAN TANAH LUAS LHOKSUKON KABUPATEN ACEH UTARA
Authors: Fitriyawati Erna , Muda Iskandar
Published: May 2019

ABSTRACT This study discusses the Value of Ethics and Aesthetics Meudikee Anggok In Dayah Darul Huda Bayi Village District Lhoksukon District Luas Aceh. Aims to describe Ethical and Esthetic Value of Meudikee Anggok In Dayah Darul Huda Bayi Village, Lhoksukon Sub-district, Lhokukon District, Aceh. The theory used in this study is the ethical theory of K. Bertens According to K. Bertens The ethical theory according to K. Bertens (1993: 53) that ethics is the conscience (inner life), how to be ethical and good that actually arise from self awareness. Based on the theory of K. Bertens concluded that every human being has experience of the conscience and that experience is the most obvious encounter with morality as a reality, it is difficult to show another experience that is so frankly the ethical dimension of our lives. Hence the experience of the conscience is an appropriate entry point about ethics. Time in use in this study is during (two months), ie from July to September. The location of this research was conducted in Bayi Village, North Aceh District. The population in this study are artists who know about Meudikee Anggok dance, and the sample is Aneuk Dikee (son of Zikir). The research data analysis used is descriptive qualitative, data collecting technique done by obsevasi, literature study, interview, and documentation. Based on the data collected, it can be seen that Meudikee Anggok has been known for a long time. The number of boys who performed Meudikee Anggok at the beginning of choreographer formation was 16 Aneuk Dikee and 4 syeh (radad). Meudikee anggok has ethical values contained in the ethics of movement 1. Respect 2. Saleum. 6. Noble Prophets and 7. Prayers. Aesthetic value that can be observed every movement at 3. Istigfar, 4. Salawat prophets and 5. Qasas. Keywords: Meudikee Anggok Di Dayah darul Huda Deswa Bayi Kecamatan Luas Lhoksukon                  Kabupaten Aceh Utara,Ethics and Aesthetics.
Social Democratization of the Central and Eastern European Communist Parties at the Turn of the 20th-21st Centuries: Backgrounds and Prospects
Authors:   Moscow State Institute of  International Relations (University) of the Ministry of  Foreign Affairs of the Russian Federation, Blinova Margarita Aleksandrovna
Published: May 2019

The paper deals with the transformation of former Communist parties in Central and Eastern Europe into social democratic parties. Many of them have managed to become influential political move-ments, come to power by elections, and, thus, take part in the modification of both political and social and economic systems of their countries. Despite various crises faced by the modern social democrat-ic movement in several European countries, the so-cial democratic parties in general and the ones that emerged from the Communist movement in particu-lar are regarded as a powerful political force in the region under review and a pivotal element amongst left-wing political parties. In this regard, a study on backgrounds to the social democratic transfor-mation of post-Communist parties and their pro-spects is of great scientific and practical value. In addition, the author examines the role of the So-cialist International in providing the social democra-tization of former Communist parties.
Assessment of Heavy Metal Contamination in Soil in and around Sohar Industrial Port Area, Oman
Authors: Al-Jabri Maha , Moraetis Daniel , Victor Reginald
Published: May 2019

The increase in the number of heavy metal emitting sources in industrial areas is a serious issue in pollution science. Sohar Industrial Port (SIP) area is located in the northern part of Oman where different industrial activities like petrochemical production, metal processing, and waste disposal are prevalent. This study comprehensively identified the presence and quantities of heavy metals in the soils of Sohar Industrial Port area and traced their origin to geogenic or anthropogenic sources. Bulk geochemical and mineralogical analyses were carried out on all samples. Environmentally available and bioavailable heavy metals were extracted by diethylenetriaminepentaacetic acid (DTPA) and were finally analyzed using Inductively Coupled Plasma-Optical Emission spectrometry (ICP-OES). The environmentally available metals that showed higher concentrations when compared to international standards were Ni and Cd. The geochemical evidence showed a strong geochemical signature of the ophiolite rocks in the soils as indicated by the significant correlation between Cr and Ni (P< 0.05). In addition, the Cd content showed significant correlations with Ni and Cr (P< 0.05). Other metals like Pb and Zn, possibly also were geogenic in origin, but with significantly elevated concentrations in samples close to a national highway (P< 0.05). The present study demonstrated the significance of understanding the geological framework of an industrial area, which is already imposing high background concentrations of Cr, Ni and Cd, and also the possible anthropogenic impacts in the cases of Pb and Cd that exceeded internationally permissible limits.
Analisis Sentimen terhadap Debat Pemilihan Gubernur Jakarta Tahun 2017
Authors: Yanis Rudelvi Yana
Published: May 2019

The Governor election is one of symbolization momentum of the consolidation of democracy in Indonesia, all the citizen of Jakarta should get to know the candidates who will be the next leader. Debate of the Governer candidate and vice Governer candidate held to know the extent to which the integrity of a candidate,leadership, and the capacity of candidates in run program build a better Jakarta in the future. The implementation of the debate future governors and candidates vice governor these affect the perceptions of will leadership candidate after becoming the governor of Jakarta. The negative and positive sentiment also springing in providing an assessment of three candidate to run for governor and vice governor of DKI Jakarta .The purpose of this research is to know the topics of discussion that will  influence the sentiment related to the Debate of Candidates for Governor and vice Governor of DKI Jakarta. This study uses a qualitative approach and documentation data collection methods with the help of software Atlas ti. The process of analyzing and classifying documents use data in the form of text documents taken from detik.com.The data collected is a document containing the 2017 Governor Candidate Debate taken from the first Debate on January 13, 2017, second debate on January 27, 2017, third debate on February 10, 2017.   Based on the results of document analysis on detik.com related to the Governor's Candidate Debate and the 2017 DKI Jakarta vice Governor Candidate. classification results show that most opinions are found in the third debate with 151 positive opinions and 145 negative opinions.
Reflective Journal as a Self-Directed and Sustainable Professional Development Tool for Pre-Service Teachers: A Case Study in English Language Education Study Program
Authors: Agustin Atalya
Published: May 2019

Teaching practice is one among many programs in teachers training which focuses on having a professional preparation for work. In this program, student-teachers are asked to improve their skills through teaching actual students and engaging with school environment. Moreover, they are also building their own knowledge based on the improved teaching and learning process. It is crucial for them as pre-service teachers to encounter such experience. This meaningful theory and experience-based insights are possible to obtain if the student-teachers possess the commitment of self-reflection. There is likely a big chance that this action will be perpetual because of this personal initiative. This study aims to analyze the use of reflective journal as pre-service teachers’ professional development tool, their attitude towards reflective journal, as well as the strength and challenges arise related to the use of reflective journal during their teaching practice. The type of the research is a qualitative case study research. The data collection techniques being used are questionnaire and Focus Group Discussion (FGD). Moreover, the technique of analyzing the data was Miles and Huberman concept of data reduction, data presentation, and conclusion drawing. The results of this research will be presented in a descriptive-narrative manner by describing and discussing the data of the research.
Effectivenes of Strengthening Loaded RC Beams with FRCM System
Authors: Blikharskyy Z. , Brózda K. , Selejdak J.
Published: May 2019

The composite materials as FRP (Fiber Reinforced Polymers), which are characterized by benefits resulting from the combination of high strength reinforcement (as carbon, glass, steel or aramid fibers) with synthetic matrix are increasingly used to reinforce existing structures. Reinforcing System as FRCM (Fibre Reinforced Cementitious Matrix), which includes, among others, Ruredil X Mesh Gold System, is much less commonly used. However, the uniform and practical methods for calculating composite reinforced structures are not determined. Especially when considering the real conditions of structure exploitation, which requires further research in this field. In the paper the initial loading level influence on the efficiency of reinforced concrete beams strengthen using system Ruredil X Mesh Gold was investigated.
Simplified Design Equation for Web Tapered - I Sections Using Finite Element Modeling
Authors: Rameshbabu C. , Prabavathy S.
Published: May 2019

The web - tapered I-columns have the capacity to resist the flexural buckling and lateral torsional buckling at a particular location where as in the rest of the member the capacity is lower. There needs a focusing on the nonprismatic members, to find the buckling capacity and standard procedures are to be framed in Indian Code IS 800:2007. This exploratory research explores simulated finite element models covering a total of 60 web tapered column sections having taper ratios (h2/h1) from 1.0 to 3.0 using FEA software ANSYS17.2. With an elaborate Eigenvalue buckling analysis, this research has come up with newer design equation for calculating the buckling load of web tapered I columns. This novel equation could predict the buckling stress for any taper ratio of web tapered I column of any length.
Optimization of Aggregates Supply for Concrete Plants
Authors: Nicał A.K.
Published: May 2019

Over the recent years, there is a growing interest in concrete prefabrication. Many of the currently operating concrete plants have implemented systems that increase the quality of manufactured products, have expanded highly automated production lines and have clearly reduced wastes and energy consumption. However, one of the problems often encountered in the construction industry is the inefficient organization of logistics processes. Proper shipments planning of aggregates consisting of the selection of their appropriate quantity and the aggregate stock, corresponding to the needs of concrete plants should contribute to lowering costs. Therefore, it is necessary to carry out the optimization, the aim of which is to minimize costs, as well as to maximize the fulfillment of the degree of expected needs of concrete plants. This paper presents a model that allows purchase strategy optimization of aggregates with different grain size fraction. For research purposes, three separate aggregate stocks and five different concrete plants are considered.
Influence of randomness of buckling coefficient on the reliability index’s value under fire conditions
Authors: Kubicka Katarzyna , Radoń Urszula
Published: May 2019

The paper concerns reliability analysis of steel trusses under fire conditions with taking into account randomness of buckling coefficient, modulus of elasticity’s and yield strength’s reduction factors. To assess the reliability system analysis was employed. The calculations of appropriate standard deviations of random variables were realized in Mathematica program. Two types of trusses were analysed: statically determinate and indeterminate, so respectively serial and mixed system were used. The results, gotten for different levels of coefficients of variation of reduction factors were presented.
Can smoke control become smart?
Authors: Węgrzyński Wojciech
Published: May 2019

Smoke control solutions are used to maintain tenable conditions in buildings, enabling evacuation process, rescue operations and reducing the thermal stress on the building structure. For last 50-years the design process of such solutions did not significantly change – a required volumetric capacity is calculated with theoretical and empirical models, and further, mechanical design is prepared to deliver this capacity. In this paper, a new approach – “smart smoke control” is introduced, as a system that adapts the performance parameters based on the momentary measurements of temperature in the building. The system follows the growth and decay of fire in the building, which allows optimization of its mechanical parameters, and provides substantial increase in the performance. This paper provides a discussion on traditional and new concepts in smoke control, and defines areas, in which a paradigm shift must occur, to enable widespread adoption new and more efficient solutions. The paper does also refer to previous proof of concept studies, presenting the preliminary assessment of the performance of a smart smoke control system.
Numerical Models for the Evaluation of Natural Vibration Frequencies of Thermo-Modernized Building Walls
Authors: Kuźniar K. , Zając M.
Published: May 2019

As a result of the necessity to improve energy properties of prefabricated buildings, their thermo-modernizations are performed. In the paper various approaches to the modelling of prefabricated load bearing walls before and after thermo-modernization are presented. Simple one layer models with extra mass from ceilings and equivalent stiffness as well as multilayer ones are taken into consideration using the finite element method software. Values of the natural frequencies of the wall horizontal vibrations calculated using the various models, are compared. It was proved that even the very simple model with equivalent stiffness allows to compute natural vibration frequencies of wall with acceptable accuracy for engineering practice.
Properties of Asphalt Concrete with Basalt-Polymer Fibers
Authors: Radziszewski P. , Sarnowski M. , Plewa A. , Pokorski P.
Published: May 2019

Asphalt mixtures are commonly used for the pavement construction for national roads with a high traffic load, as well as local roads with low traffic load. The constructions of local road pavement consisting of thinner, more flexible layers located on less stable subbase than the pavement of national roads, require reinforcement with asphalt layers characterized by increased fatigue life. Technologies that allow quick repairs and reinforcements, while improving the durability of the road pavement are being sought. Such technologies include the use of modifications of asphalt mixtures with special fibers. The paper presents the results of investigations of the properties of asphalt mixtures modified with innovative basalt-polymer fibers FRP. On the basis of the obtained test results according to the Marshall method, stiffness modulus and fatigue durability, the technical properties of asphalt mixtures with FRP fibers addition were improved. This technology significantly increases the fatigue life of asphalt concrete dedicated for repairs and reinforcements of road pavements.
Numerical Verification of the Wooden Structure of Fortified Settlement from the Early Iron Age in Biskupin
Authors: Terlikowski Wojciech , Gregoriou-Szczepaniak Martyna , Sobczyńska Ewa , Wasilewski Kacper
Published: May 2019

Biskupin is one of the most recognizable archaeological site in Pola1nd and Central Europe. The origins of the excavations dates back to year 1934 and had lasted almost continuously until 1974. In the framework of the grant from the Ministry of Culture and National Heritage interdisciplinary team of scientists from Archaeological Museum in Biskupin and Warsaw University of Technology performed multi-dimensional analysis of the settlement. Based on the integrated vector documentation, resulting from the photographic documentation, numerical models of structural systems of main types of buildings and defensive rampart were prepared. The aim of the analysis was a verification of the earlier findings of archaeological and architectural researches. The analysis allowed to verify both the arrangement of individual parts of structure of buildings, their work and the interconnection, as well as the possible dimensions of the individual components.
Validation of the cone penetrometer suitability for determining the state of soil
Authors: Maślakowski M. , Brzeziński K. , Zbiciak A. , Józefiak K.
Published: May 2019

The subject matter of this paper is assessment of the suitability of a dynamic cone penetrometer for determination of the state of soil. The principle of operation of the dynamic cone penetrometer, similar to commonly used DPL penetrometers, is described in the paper. Next the results of investigation conducted in Poland using a new dynamic cone penetrometer are presented. A series of measurements were performed in real field conditions. An attempt was made to correlate the results obtained with the dynamic and static cone penetrometers (CPT) respectively. These correlations were then subjected to validation to obtain a preliminary evaluation of the suitability of the dynamic cone penetrometer for determining the state of soil.
Analysis of the Barrette Load Investigation of the Tallest Building in European Union
Authors: Kacprzak G. , Bodus S.
Published: May 2019

The paper presents a static load test of a pile with the largest vertical load in Poland to-date up to the force of 23000 kN. The test was performed in the centre of Warsaw on the construction site of a future high-rise building to be the tallest building in European Union. The designed building height measured from the ground level is 310 meters including an 80-metre mast. The foundation of the building was designed as a Combined Piled Raft Foundation (CPRF) utilising the barrettes and diaphragm walls technology. The test was carried out on barrettes with lengths of approx. 28 and 34 m and was aimed to estimate the stiffness (load-settlement relation) of the designed 17.5 metre-long barrette situated below the foundation level. In addition to that a series of extensometric sensors was placed inside the barrette to determine the distribution of the axial force.
On Mathematical Descriptions of Uncertain Parameters in Engineering Structures
Authors: Pełczyński J.
Published: May 2019

Civil engineering is one of the many fields of occurrences of uncertain parameters. The present paper in an attempt to present and describe the most common methods used for inclusions of uncertain parameters. These methods can be applied in the area of civil engineering as well as for a larger domain. Definitions and short explanations of methods based on probability, interval analysis, fuzzy sets, and convex sets are presented. Selected advantages, disadvantages, and the most common fields of implementation are indicated.

An example of a cantilever beam presented in this paper shows the main differences between the methods. Results of the performed analysis indicate that the use of convex sets allows us to obtain an accuracy of results similar to stochastic models. At the same time, the computational speed characteristic for interval methods is maintained.
The Classification of Mechanical Models of Road Pavements
Authors: Nagórski R.
Published: May 2019

A review of mechanical models of road pavements in the form of a proposal of classification of these models is presented. It is assumed an autonomy of the following elements of pavement model: the models of structural layers, the subgrade model, the interlayer bonding models, including bonding of pavement structure with its subgrade, the models of external impacts on pavement layers, including load of heavy traffic, the models of pavement environment impacts on structural layers’ borders (lateral) and subgrade borders (including the lower one) – according to the selected criteria such as structural criterion, material criterion (physical criterion), dimension criterion and model scope (purpose) criterion − in the frame of assumptions of the classical Newtonian deterministic mechanics. The presented attempt to classify mechanical models of road pavements supports to orientate the roadmen community within a scope of the mechanistic modelling of these structures.
Static and Dynamic Parameters of Railway Tracks Retrofitted With Under Sleeper Pads
Authors: Kraśkiewicz C. , Zbiciak A. , Oleksiewicz W. , Karwowski W.
Published: May 2019

The paper presents results of the laboratory tests made for the prototype resilient under sleeper pads in the Warsaw University of Technology laboratory unit. These pads are dedicated to reduce vibrations transmitted to the vicinity of the railroad and to improve the resistance of the railroad structure. The laboratory testing program was carried out for elastomeric materials (polyurethane and rubber based) due to the PN-EN 16730 standard. The obtained values of the key parameters were used in order to determine the insertion loss vibration level by applying analytical method. The paper presents the influence of selected parameters i.e. static and dynamic moduli on the reduction of vibration and structure-borne sound level.
Influence of Bond Behaviour of Flexural GFRP Reinforcement on Failure Mechanisms in Beams Without Stirrups
Authors: Kaszubska M. , Kotynia R.
Published: May 2019

The aim of the paper is to investigate the shear failure mechanisms in T-shape, single span and simply supported beams exclusively reinforced with longitudinal glass fiber reinforced polymer (GFRP) bars. Usually the critical shear crack in RC beams without stirrups develops through the theoretical compression strut reducing the shear strength following the shear failure. The main parameter affecting the crack pattern and the shear strength of the beams is the shear slenderness. However, the test results presented in the paper indicated the new arching effect due to the bond losing between the GFRP flexural reinforcement and concrete. This failure mode revealed unexpected critical crack pattern and failure mode. The research of concrete beams flexurally reinforced with GFRP bars without stirrups indicated two failure modes: typical shear-compression and a new one leading by the bond losing between the ordinary reinforcement and concrete.
Effect of manure amount and improved application technique at corm burial on the propagation of enset (Ensete ventricosum) suckers
Authors: Bosha Abraham , Dalbato Abitew Lagibo , Tana Tamado , Mohammed Wassu , Tesfaye Bizuayehu , Karlsson Laila M.
Published: May 2019

Ensete ventricosum (enset) has been cultivated in Ethiopia since ancient times. It is a multipurpose, drought tolerant and food security crop. When burying enset corms for vegetative propagation, manure is usually placed on the soil surface. However, there is no research-based evidence to justify this practice. We hypothesised that enset sucker production would be enhanced by placing manure in the corm burial hole. We tested this hypothesis, investigated manure application rates per buried corm and tested the effect of supplying a small amount of inorganic fertilizer. Three enset cultivars (Endale, Gewada and Yanbule) were used. Ninety corm halves were buried in separate holes (N = 3), resulting in 1,389 individually recorded suckers. There were significantly more suckers and a larger total biomass when manure was placed with the corm than when spread on the top of the soil, thus corroborating the main hypothesis. The number of suckers and the biomass increased with increasing amounts of air-dried cow manure up to 4.0 kg DW per burial hole, while the size of the three largest suckers per buried corm increased further with 6.0 kg DW of manure. Supplying a smaller amount of manure (2.0 kg DW) or equal nitrogen amount from inorganic fertilizer increased the production, compared to the treatment with no fertilizer. In conclusion, we recommend that farmers should ideally bury the corm with 7-11 dm3 of air-dried pulverized manure, thoroughly mixed with field soil; if manure is in short supply, burying even a small amount of it with the corm is beneficial.
Advancing the quality of care and nursing practice through emancipatory reflection
Authors: Yu Hong-Jing , Ling Dong-Lan , Hu Jia-Le
Published: May 2019

Reflection is a fundamental skill of health-care professionals and plays an important role in ensuring the quality of care in health-care practice. It is believed that undertaking reflection in practice can help nurses develop an awareness of a sense of personal power and agency, cultivate their critical thinking ability and help them promote their professional development. However, reflection has not been introduced widely as a nursing curriculum in China, and literature shows that some clinical nurses lack critical thinking skills and critical reflective practice skills by reason of not receiving systematic education on reflection when they were at nursing college. Therefore, we present a series of seven articles focused on prevalent and interesting practice-based events to reflect on in this special issue. The main aim is to disseminate reflective methodology and techniques and present examples of reflective writing for nurses. It is expected that these articles will help to lead Chinese nurses to adopt critical emancipatory reflective processes to bring about transformative actions.
Emancipatory reflection on a nursing practice-based ethical issue about nurses’ paternalistic decision-making for patients
Authors: Tang Lian-Lian
Published: May 2019

Objective

This study aimed to demonstrate and promote the skill of critical emancipatory reflection through reflecting on a nursing practice-based ethical issue about nurses’ paternalistic decision-making for patients. Meanwhile, critical awareness will be developed and the underlying issues of paternalism in nursing decision-making will be analyzed. Then, by applying the procedure, improvement in nursing decision-making practice will be expected.

Methods

Taylor’s model of emancipatory reflection with four steps, including construction, deconstruction, confrontation, and reconstruction, is utilized to guide the author’s reflection.

Results

Guided by the socialization theory, the author’s personal and professional socialization is seen to be associated with the formation of the value of paternalism. The theory of reflexivity is applied to unearth the related issues, including deeper personal value, work environment, as well as historical and cultural contexts. Moreover, the power derived from policy, work relationship, and nursing administration, which could induce paternalism in the author’s nursing decision-making practice, was critically debated using the hegemony theory. Finally, new insights into paternalism will be achieved, which enable change in terms of how to facilitate patients’ autonomous decision-making.

Conclusions

The process of refection makes it clear that respecting patients’ right and performing patient-centered caring are the bases to change the paternalism existing in the nursing decision-making practice currently. The reconstruction step assists the author in terms of how to value the patients’ autonomy and balance patients’ safety and choice, rather than being overprotective; carry out risk assessment, and search for strong evidence to counterbalance the positive and negative aspects of risk-taking; communicate with patients appropriately in a manner that they can comprehend; spend more time to explore patients’ preference and choice; make every effort to elevate the patients’ decision-making capacity; implement patient-centered care and shared decision-making in nursing practice; consult with other colleagues and obtain the required support when limitations or challenges exist; try to justify and avoid hidden paternalism behind policy or guidelines; deal with the power in hand well and fairly; and also positively face the powers that constrain the author.
Critical reflection on the role of theater nurses in a multidisciplinary team for perioperative care in China
Authors: Xiao Xiao , Zhu She-Ning
Published: May 2019

Objective

The aim of this article is to reflect on the role of theater nurses in a multidisciplinary team, understand the factors that have influenced theater nurses’ practice, and improve the authors’ clinical practice ultimately.

Methods

The author used Smyth’s model to guide the process of reflection on the practice issue. Critical reflection, critical emancipatory theory, reflexivity, and critical social theory were used to help the author analyze the factors that have affected theater nurses’ practice in the organization.

Results

There are gaps between the espoused and enacted theories. A theater nurse’s practice is determined by multiple factors, such as political, structural, social, historical, cultural issues, and so on. The hierarchy of the health context could hinder possible changes in theater nurses’ practice. To better understand our practice and implement transformation, we should shape a supportive environment, bear in mind the practice motto of “patient-centered” care, and improve our knowledge and reflection skills.

Conclusions

Reflection plays a significant role in the advancing of practice among theater nurses and needs to be combined with clinical practice. To provide the best service of care to perioperative patients, a theater nurse should have an insightful understanding of the factors that have influenced her/his behaviors historically, socially, and culturally. By improving their critical reflection skills, practitioners could gain knowledge from experience.
The effects of deposition potential on the optical, morphological and mechanical properties of DLC films produced by electrochemical deposition technique at low voltages
Authors: Aslan Naim , Başman Necati , Uzun Orhan , Erkovan Mustafa , Yakuphanoğlu Fahrettin
Published: May 2019

Diamond-like carbon (DLC) films were electrochemically deposited onto indium tin oxide (ITO) substrates using acetic acid and deionized water as electrolyte at low deposition voltages (2.4 V and 60 V). The transmittance of the films was investigated by UV spectrometry. Transmittance measurements versus wavelength revealed that the films transmit 86 % to 89 % light in visible region and band gap of the films varies between 3.87 eV and 3.89 eV. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used for structural characterization to evaluate surface morphology of the DLC films. The grain size and the surface roughness increased for the films prepared at higher deposition potential, while their measured average height decreased. The mechanical properties (hardness H and elastic modulus Er) were determined from load-displacement curves which were obtained by using nanoindentation method. Hardness and elastic modulus of the films increased as the deposition voltage of the films increased from 2.4 V to 60 V.
High-energy seismic events in Legnica–Głogów Copper District in light of ASG-EUPOS data
Authors: Szczerbowski Zbigniew
Published: May 2019

Seismic events in the area of Poland are related mostly to copper and coal mining, and they are regarded as the most dangerous natural hazard. Although development of geomechanical modelling as the development of geophysical methods determining seismic hazard are evident, low predictability of the time-effect relationship still remains. Geomechanical models as geophysical data analysis highlight the interaction between parts of rock mass or allow to reconstruct the way of rock mass destruction and to understand the processes that take place in the high-energy tremors.

However, the association of larger mining tremors with pre-existing geological features has been reported by many investigators; in geomechanical practice, investigations of rock mass condition concentrate on this problem in the local scale. Therefore, the problem of relations between high-energy seismic events in Legnica–Głogów Copper District (LGCD) and regional scale deformations of terrain surface resulting from possible tectonic activity is discussed in this paper. The GNSS data evaluated from the observations of ASG-EUPOS (Active Geodetic Network – EUPOS) stations in the area of LGCD and in the adjacent areas is analysed in this study. Temporal variation of distances between the stations and evaluated on that base so called apparent strain was combined with the occurrence of high-energy tremors. Consequently, after the examination and analysis of occurrences of mining tremors, it is found that high-energy seismic events and periods of strain accumulation evaluated from GPS/GNSS data have temporal relations. Although the seismic events were triggered by mining, nearly all the events with energy E > 108 J occurred in the periods when the analysed stations’ positions demonstrated a decrease in the baseline length.
Transformation of 3D geospatial data into CityGML – a case of Prague
Authors: Janečka Karel
Published: May 2019

The 3D geoinformation is becoming important for cities and their policies. The cities are therefore exploring the possibilities of 3D virtual city models for more efficient decision making. To maximize the economic benefit of such data, the cities can provide their 3D geospatial data for further usage, and so, new applications can be created. The paper defines a way how the freely available 3D geospatial data of Prague can be transformed from the proprietary data format into the open data model. The 3D geospatial data about the buildings, bridges and digital terrain model were transformed from the 3D shapefile into the CityGML. This is an application independent information model and exchange format. This will allow for the wider use of the 3D city model by different groups of users. The generated CityGML files were further imported into the spatial database with appropriate database CityGML-based scheme. It enables more efficient management and querying of CityGML data. To enable the wider audience to explore the 3D city model, the visualization in the web environment was also explored. The paper also presents the way how the attributes from the external data sources can be connected to the 3D objects in the web environment.
Agile Corps - A Public Service-Learning Program Part I
Authors: Udoewa Victor
Published: May 2019

Each year the U.S. government invests more than $86 billion on IT products and services, yet the majority of these projects fail--they are delivered late, go over budget, are canceled, are outdated when finally delivered, or do not fit the user. Due to barriers in hiring and training, the government has tended to outsource IT talent at a premium price through contractors, but the results have not changed. The small amount of technology talent that exists in government tends to be senior, and there currently are very few, viable options for high-quality, junior and mid-level technologists to find a job in government and develop into senior roles. Agile Corps is a program designed to identify, recruit, train, and retain junior and mid-level technology talent in the government. This paper presents the design research and initial prototypes of the program and service called Agile Corps and introduces and prototypes the concept of public service-learning.
Impacts of a humanitarian engineering education pathway on student learning and graduate outcomes
Authors: Smith Jeremy
Published: May 2019

This study explores student outcomes from engagement with a humanitarian engineering pathway embedded in the core of an undergraduate engineering degree program.  The pathway provides multiple engagements with humanitarian engineering including assignment topics, study abroad experiences and service-learning projects.  A mixed-method study over 18 months collected survey data from education initiatives concurrently with graduate interviews to identify outcomes from student engagement.  A set of seven outcome themes were identified including additional motivations for study, the development of professional skills, and an enhanced perception of employability.  The research demonstrates the contribution of humanitarian engineering to the development of contemporary engineers as well as to support greater diversity and cultural change in engineering.  However, challenges were identified particularly for work experience and career opportunities.  The research proposes future works evaluating outcomes from multiple universities to develop a more complete picture of the impacts of humanitarian engineering at a national level.