bluuebunny/crossref_metadata_2025 huggingface dataset:
Improving Activities and Learning Outcomes of Procedure Text Lesson Using Cooperative Learning Model with Jigsaw Technique in Junior High School
Authors: Tarmili Tarmili
Published: November 2018

The purposes of this study were (1) The comprehension of the fourth grade teachers about the scientific approach and integrated thematic learning; (2) the integrated thematic lesson plan with a scientific approach; (3) the implemented steps of the scientific approach to the core activities of the learning process; (4) the activities of learners in the integrated thematic learning with a scientific approach; (5) the attitudes of students in the integrated thematic learning with a scientific approach; and (6) the factors supporting and inhibiting to the application of scientific approach in the integrated thematic learning.The approach used was a qualitative descriptive approach. The instrument of collecting data consisted of nonparticipant observation, interview and documentation study. The data Triangulation was done in two ways which were triangulation sources and triangulation methods.The results showed that the designed lesson plan was an integrated thematic scientific approach. The learning process was done according to the core activities with the scientific approach activity steps. The activities of students have also been according to the steps in the scientific approach. It is needed the supporting factors such as facilities and infrastructure to succeed the learning. However, there is also the obstructed factors.
Extended Peptide Basis Set for Variational Markov Models: Secondary Structure, Orthonormality, and Undersampled Transitions
Authors: Martini Louis , Keller Bettina
Published: November 2018

The variational approach to conformational dynamics offers a systematic way to con- struct kinetic models from molecular dynamics simulations, using an arbitrary set of basis functions. We have recently proposed a basis set for peptide systems that only depends on the sequence of amino acids in the system. This basis set is not data- driven and can therefore be used to compare models for different MD simulations. Here we introduce an orthonormality condition for this basis set as a requirement for the variational models to remain directly interpretable. The orthonormality condi- tion naturally leads to a way of detecting correlations between the sampled marginal stationary probability distributions at each residue in the peptide sequence. We show how these correlations emerge from either undersampled transitions or from inher- ent dynamical dependencies between the residues. Our basis set relies on a tensor structure obtained from residue-centered ansatz functions. We demonstrate that this structure is sufficient to model both β-sheet and α-helix formation in peptides.
Model Reduction in Large Chemical Systems- an Alternative Method Applying Discrete Approximation
Authors: Fjeld Magne
Published: November 2018

No numerical data.

Dynamic model reduction techniques based on the decomposition of the stoichiometric matrix to find the chemical invariant, break down if axial diffusion is present in a tubular reactor. Straightforward discretization of the partial differential operator does indeed show that the resulting discrete dynamic model cannot generally be partioned to obtain the reaction variant vector and the reaction invariant (asymptotic) vector. However, the paper demonstrate that, if the diffusional tubular reactor is discretely and approximatively represented by tanks-in-series, then matrix approaches to successfully find the chemical variant and invariant vectors of the resulting chemical process model is possible.
Effectiveness of repeated usage of the modified Zarrouk culture medium for cultivation of Spirulina platensis
Authors: Viazau Y. V. , Manankina E. E. , Filipchik E. A. , Goncharik R. G. , Shalygo N. V.
Published: November 2018

Spirulina (Arthrospira) platensis biomass has a wide range of applications in several industries. One of the key issues for its production is the reduction of the culture medium cost. Here we have shown the possibility of a single recycling (repeated usage) of the modified Zarrouk nutrient medium (MZM; which contains 8.4 g/l of NaHCO3and 0.1 g/l of NaOH instead of 16.8 g/l of NaHCO3) for spirulina cultivation without altering culture productivity, photosynthetic pigments and protein contents in its biomass  given that technological approach consisting in application of a mixture of a freshly prepared and once recycled modified Zarrouk medium in a ratio of 1:1 by volume is used. The obtained results can be applied for further reduction of costs of spirulina biomass production compared to methods described in previous studies.
Structure, magnetic and magnetic transport properties of layered cobaltite Sr0.9Y0.1CoO2.63
Authors: Troyanchuk M. О. , Bushinsky M. V.
Published: November 2018

The structure, magnetic and magnetotransport properties of perovskite Sr0.9Y0.1CoO2.63are studied. It is shown that the sample is structurally two-phase. The main phase has a tetragonal-distorted unit cell and is described by the spatial group I4/mmm. The broadening of the reflexes with indexes corresponding to a doubling of the parameter from the unit cell indicates that there is no strict translational symmetry along the с-axis. The presence of a broadened superstructural reflex observed at small angles on X-ray diffraction patterns at temperatures below 400 K is due to the monoclinic phase, whose content is much smaller than the tetragonal phase. Spontaneous magnetization appears during the formation of the monoclinic phase. The magnetic structure is predominantly an antiferromagnetic G-type structure with magnetic moments of 1.5µBin the layers of CoO6octahedra and 2µBin the anion-deficient CoO4+γlayers. The electrical conductivity of Sr0.9Y0.1CoO2.63has a semiconductor in character. The magnetoresistance reaches 57 % in a field of 14 T at a temperature of 5 K and decreases strongly with increasing temperature.
Analysis of the genome of the bacteria Bacillus amyloliquefaciens BIM B-439D
Authors: Titok M. A. , Valentovich L. N. , Berezhnaya A. V. , Kolomiets E. I.
Published: November 2018

According to the results of the analysis of the complete nucleotide sequence of B. amyloliquefaciens subsp. plantarum BIM B-439D, it is established that the genome of the strain is unique and is represented by a single ring chromosome with a size of 3978134 base pair containing 46.5 % G/C-pairs. The key genetic loci determining synthesis of antimicro-bic metabolites are defined: lipopeptides (surfactin, fengycin, bacillomycin D), dipeptide (bacilysin), siderophor (bacillibac-tin), polyketide antibiotics (difficidin and oxydifficidin, bacillaene and macrolactin), bacteriocin (amylocyclicin) and peptide/ polyketide (putative - tyrocidin), restriction-modification systems and mobile genetic elements (IS-elements and prophages) are characterized. The identified features in the organization and localization of individual genetic determinants (for example, intact prophage of 37558 bp) can be used as reliable molecular genetic markers for fast identification of the strain when it is used commercially. The complete nucleotide sequence of the genome can serve as the basis for a detailed functional analysis of the practically significant properties of the microorganisms of the Bacillus group.
Influence of -174G/C IL-6 gene polymorphism on the susceptibility to rheumatoid arthritis in children and adults in the Republic Of Belarus
Authors: Yatskiu H. A. , Balshakova D. V. , Tchitchko A. M. , Yagur V. E. , Sukalo A. V. , Goncharova R. I.
Published: November 2018

The usage of clinical and instrumental methods only may be not sufficient for early diagnosis of autoimmune rheumatic diseases, as well as for their course prediction. The progress of modern rheumatology is largely conditioned by the investigation of molecular-genetic nature of diseases and the identification of biomarkers that can significantly improve diagnostics and therapeutic approach. The present study aimed to evaluate the effect of -174G/C IL-6 gene polymorphism on the risk of developing rheumatoid arthritis (RA) in children and adults in Republic of Belarus. It was established that the CC genotype frequency (p = 0.01, OR = 2.19; 95 % CI [1.31-3.67]) as well as the С allele frequency (p = 0.03; OR = 1.44; 95 % CI [1.04-2.00]) was significantly higher among patients with juvenile idiopathic arthritis (JIA) in the entire group and especially in girls (p = 0.04, OR = 2.55; 95 % CI [1.22-5.36]) in comparison with the controls. In addition, there is a tendency to higher frequency of the С allele in adult patients with RA (p = 0.07), reaching statistical significance in the case of RF-negative arthritis (p = 0.03, OR = 3.04; 95 % CI [1.15-8.06]). The minor С allele (p = 0.03, OR = 2.04; 95 % CI [1.09-3.82]) and homozygous CC genotype (p = 0.02, OR = 3.34; 95 % CI [1.38-8.07]) are also associated with seronegative polyarthritis in children. Thus, the presence of this allele in the tested locus increases the likelihood of developing certain rheumatoid arthritis subtypes in adults and children and can be used to reveal individuals with genetic predisposition.
Origins of the Belarussian statehood: concepts and millennium facts
Authors: Levko O. N.
Published: November 2018

The concept of creation of the common Old Russian state of the eastern Slavs is dominant in belorussian historical science. According to the concept Kiev united described in chronicles tribal unions in one territorial and political structure and had been the center of the state. Centers of the tribal unions being part of the state ruled over individual regions, and during the period of its fragmentation (XII-ХШ centuries), the appanage principalities - the lands.

A new concept of formation and development of early state formations of the eastern Slavs is based on the new facts. Three main territorial and political centers of the tribe period, Kiev, Novgorod and Polotsk became the local base of statehood of the eastern Slavs. Polotsk was the center of the early state formation “the Polotsk land” that had its own territory and ruling  dynasty. The Polotsk land covered the territory of modern North and Central Belarus. The aims of external and internal policy of this formation were strengthening its political and economic prestige, preservation of integrity during X – first half of XIII centuries.

Lands of South and West Belarus during above mentioned period on different terms and at different times had been part of early state formation “Kievan Rus”.

Communicated by Corresponding Member Aleksandr A. Kovalenia
Production of alumo-matrix composite material modified by nanostructured cubic boron nitride
Authors: Vityaz P. A. , Senyut V. T. , Kheifetz M. L. , Kolmakov A. G.
Published: November 2018

The structure and microhardness of an aluminum alloy with additives of nanostructured cubic boron nitride (cBN) after treatment under high pressure and temperature are investigated. А nanostructured powder of cBN with primary particles within 50–200 nm is used as a filler. A preliminary chemical-thermal modifying of the nanostructured cBN, which consists in its high-temperature annealing in the temperature range of 750–950 °C in a medium of aluminum-contai ning compounds, is carried out to increase the chemical affinity of the nanostructured cBN to the aluminum matrix. It is shown that the modifying of nanostructured cBN with aluminum increases the strength of the additives retention in the aluminum matrix. At the same time the increase in the concentration of BN additives from 1.5 to 5 wt.% as well as the increase in the treatment temperature at a fixed pressure promotes the increase in the microhardness of the material by a factor of 1.5 to 2 as compared with the base aluminum alloy without the addition of a modifier. An increase in the cBN concentration to 5 % by weight results in an increase in the fraction of smaller particle conglomerates (1–5 μm) in the material and in a decrease in the size of large inclusions to 10–20 μm. In this case, the distribution of BN particles in the aluminum matrix is more uniform in comparison with a material with a cBN content of 1.5 wt.%. In the material with the growth of temperature up to 1000 °С, cBN in aggregates is recrystallized with the formation of single-crystal (polycrystalline) particles with the size of 1–10 μm  with faceting specific for cBN micron particles.
Design principes of single-stage rolling mills for machine-building industries
Authors: Tamila V. A.
Published: November 2018

The use of variable profiles in engineering is the most effective way to reduce metal consumption and improve performance, increase the lifetime, reliability of machines and mechanisms, and reduce costs for their production, repair and operation. The purpose of the present work is to systematize the blanks of machine-building industries obtained by methods of plastic deformation and to develop general principes of the con cept of creating single-stage rolling mills on the basis of analysis of their design and operation. Three main classes of profiles are distinguished, differing in the type of the initial workpiece: strip, shaped and tube periodic billets. All these types of blanks can be used as semi-finished products for the production of the main parts of suspension and chassis of cars. Strip billets are widely used for the manufacturing of elastic suspension elements, tubular – for manufacturing of hollow body parts with increased requirements for strength and rigidity, in particular, driving axle housing, semi-axles of cars and trailers, jet engine casings. Shaped periodic profiles of various shapes are used as blanks for hot volumetric stamping. Mills and automatic lines for the rolling of blanks of low-spring springs, under-springs, guide bearings of air suspension, rolling of the bars of the front axle beam, manufacturing of protective elements and semi-axes of agricultural machinery developed under the guidance or with the direct participation of the author are presented. General requirements for the deformation equipment of machine-building industries are formulated. Recommendations to use induction heating and high-temperature thermomechanical treatment are justified. It is not recommended to change the direction of movement of the workpiece in the process chain. As a power drive equipment it is better to take electromechani cal, rather than hydraulic systems. It is also advisable to choose separate drives for each working element of the equipment.
Agrifood export diversification of Belarus in terms of free trade agreements between EAEU and third countries
Authors: Baihot L. N. , Akhramovich V. S. , Hlushakova D. S.
Published: November 2018

The modern development of foreign trade of agricultural products and foodstuffs in the Republic of Belarus is characterized by an intensive increase in export potential, which requires constant search and development of new promising sales markets. For Belarus, participation in regional trade and economic integration associations (free trade zone with participation of the Eurasian Economic Union (EAEU)) is considered as one of the directions for creating favorable conditions for exporters to access the markets of partner countries. Implementation of export potential of the member states of the integration association is the subject of negotiations during preparation of agreements and requires searching the balance of concessions between the parties concerned. Therefore, in terms of trade of highly sensitive to import agricultural and processing industry products, a reasoned justification is required for requesting potential partners to ease access regimes for a particular product, given the need to provide reciprocal concessions. In this regard, we have developed a technique for assessing possibilities of developing exports of agricultural products of Belarus when signing agreements on free trade zones between the Eurasian Economic Union and third countries, we also tested the presented technique by the example of such countries as Egypt, Iran, Israel, Indonesia and India as the most likely partners to conclude free trade agreements with the Eurasian Economic Union. Based on a comprehensive analysis of the competitive environment at potential sales markets and an assessment of competitiveness of Belarusian export products, as well as study of measures of foreign trade policy (customs tariff and non-tariff barriers), the most appropriate export commodity groups were identified.
Formation of conceptual apparatus of agroindustrial complex stable development as a megacluster
Authors: Gusakov E. V.
Published: November 2018

The economy clustering makes it possible to form a comprehensive look at the state policy of regional development, increase performance, efficiency and competitiveness of business, expand opportunities for innovative development, optimize interaction between various subjects: state, business structures, research and educational establishments and other organizations. As world practice shows, the cluster claims to be one of the key components of the competitiveness of the most progressively developing countries. A list of the most important threats affecting the sustainable development of the agro-industrial complex as a megacluster is presented in the paper: a strong dependence of agricultural sector efficiency on the areas of processing and trade, a high dependence of the agro-industrial complex on the market price condition, a high dependence of domestic agro-industrial production on the external food markets, etc. Critical analysis of literature on stability issues was carried out. It is determined that the existing definitions characterize the production process and its efficiency not significantly. This made it possible to clarify the existing interpretations and characterize stability as the ability of a production or business system to function stably for a long time, despite internal and external threats. Integral components of sustainable development are determined in relation to AIC as a cluster organization: production and economic development, social and economic development, territorial development and maintaining stability of the ecosystem. Own definition of sustainable development of the agro-industrial complex as a megacluster unit has been developed. An extended classification of forms and types of stability of the cluster arrangement of the AIC is proposed. Such systematization gives an objective idea of the multiplicity of stability issues and defines the AIC as a sophisticated megacluster system.
Method for zoology-and-hygienic prediction of values of hematological parameters and natural resistance of the first litter gilts’ body according to the performance level of sows and suckling piglets obtained from them
Authors: Solyanik S. V. , Khochenkov A. A. , Zaytseva N. В. , Pestis M. V.
Published: November 2018

One of research and applied areas of development of the agricultural branch of science is its digitization nowadays. However, the practical solution of this problem is constrained by the lack of sufficient statistical material for the mathematical provisioning of computer programs for predicting productivity of pigs according to indicators characterizing metabolic processes in their bodies. The aim of the work is to develop a computer zoology-and-hygienic method for predicting the morphological, hematological and immunological parameters of the first litter gilts body according to the level of performance of sows and suckling pigs obtained from them. The paper presents the technique based on curvilinear and nonlinear mathematical interdependencies of hematological indices of the first litter gilts and their performance, which allows to simulate metabolic processes in the body of pigs in correlation with a specific level of their performance. Determining the mechanism of pig productivity formation is not based on the analysis of blood samples from several experimental animals, as it used to be for more than half a century, but from all the pigs taking part in the experiment, i.e. tens and hundreds of animals performance confirmed by the data of the primary zoology engineering registration. Reliability of differences in immunological, morphological and biochemical parameters of pigs blood is achieved through a weighted average of the level of performance and related hematological parameters forming the basis of metabolic processes in experimental animals. Thus, the use of a computer program for zoology engineering and zoology-and-hygienic experiments in pig breeding, where there are primary data on the level of experimental animals performance, allows to simulate one or another mechanism for the formation of specific numerical values of pigs performance, in particular, multiple pregnancy of the first litter gilts, with no blood samples and no morphological, biochemical and immunological analyzes.
Simulation of rod vibrations process with an independent pendular suspension and vertical stabilization system
Authors: Kruk I. S. , Tiunchik A. A. , Romanyuk V.
Published: November 2018

Continuous improvement of field sprayer design aimed at performance increase by increasing the working width, requires a special approach to ensure reliability of the supporting rod structure and quality of technological process. The question of rod vibrations, which arise when the driving systems copy field rough surface and abrupt changes in speed of the unit, remains topical. At the design stage of supporting structures of the rods, special attention is paid to the substantiation of its geometrical parameters in the longitudinal and transverse sections; studies of changes in the characteristics of vertical and horizontal vibrations, taking into account the method of the rod hanging and the system used for its stabilization. This allows to ensure the reliability of the rod design and the required quality of the technological process. The article proposes construction of the rod independent pendulum suspension on the sprayer frame and its stabilization system based on the use of damping elements. The analytical studies sequence system was developed for rod vibrations analysis, depending on initial conditions, parameters and characteristics of the used damping elements, under which they are effectively damped. It is shown that at certain numerical values of the geometrical parameters of the rod, the suspension and vibrations damping methods, not only the numerical values of the functions are changed, but also the functions themselves that describe the process of the rod's vertical movement, including cases of resonance. The obtained theoretical results can be used for design and testing of machines with rod working units and allow, at design stages, to simulate the process of movement of various rod structures from external excitatory forces, and to determine patterns of changes in the characteristics of damped vibrations using different damping elements and their installation parameters.
Amino-acid composition and balance of collagen containing raw materials
Authors: Meleshchenya A. V. , Savelyeva T. A. , Gordynets S. А. , Kaltovich I. V.
Published: November 2018

A prospective source of additional food protein in the meat industry is collagen-containing raw materials: pork skin, connective tissue obtained at meat trimming, collagen-containing by-products, etc., which can be used as part of proteinand-fat emulsions. Collagen emulsions have a wide range of functional properties: moisture and fat retention, foam and gelling abilities, emulsifying activity, active foam, emulsions and dispersions stabilizers, so they can be used as a technological additive in the meat industry. Therefore, the most important task in the process is the complete use of collagen-containing raw materials with the maximum implementation of its properties. The paper presents the results of studies on determining the amino acid composition and balance of collagen-containing raw materials: pork skin, beef tendons, lungs, rumen, beef lips and ears, pork ears, udder, spleen, omasum, skin, head, feet, caruncle, stomach and intestines of poultry. It was determined that collagen-containing raw material contains all the essential amino acids: isoleucine, leucine, lysine, methionine and cysteine, phenylalanine and tyrosine, threonine, valine with the amino acid count in the range of 17.1–185.0 %. At the same time, a more balanced amino acid composition in comparison with other types of collagen-containing raw materials is shown by: pork skin, udder, beef lips and trachea, chitterlings, omasum, rumen, lungs and spleen as evidenced by high values of amino acid score (up to 185 %), essential amino acid index (up to 1.1), utility factor of the amino acid composition (up to 0.84), as well as the approximate values of the comparable redundancy index (0.0007–0.0043). The research results confirm the prospectiveness of combining muscle and connective tissue proteins in recipes of meat products of high nutritional and biological value.
Scientific activity of the Belarusian scientist J. Narkiewicz-Jodko (second half of the nineteenth and early twentieth centuries)
Authors: Beryozkina N. Yu. , Gaponenko O. A.
Published: November 2018

The study is devoted to the scientific activity of the outstanding Belarusian scientist J. Narkiewicz-Jodko. Based on the study of a wide range of sources revealed as a search result in the archives and libraries of Belarus and foreign countries, many little-known facts from the life of the researcher have been refined. The historical and bibliographic analysis of the publications of the late XIX – early XX centuries allowed to consider various directions of the scientist’s activity, his active creative connections that make a considerable interest for studying the history of cooperation between representatives of Belarusian and Western European scientific thought.
Development strategy and main directions of academic research in the field of Culture, Language and Literature
Authors: Lokotko A. I.
Published: November 2018

The article is devoted to the research of the Center for Belarusian Culture, Language and Literature of the National Academy of Sciences of Belarus that was created in 2012 on the basis of K. Krapiva Institute of Art Studies, Ethnography and Folklore, Y. Kolas and Y. Kupala institutes of language and literature. The stages of the institutes research activity, fundamental scientific works, scientific schools, contribution to the humanities of leading scientists, and immediate and remote prospects of research in the fields of culture, language and literature are analyzed.
The history of television documentary drama genesis, its ontological characteristics
Authors: Stezhko N. G.
Published: November 2018

The article analyses the genesis of television documentary drama and its dual nature that causes much controversy among film theorists. The ontological characteristics of docudrama are considered, in particular its intrinsic connection with documentary theatre. Docudrama originated at the junction of feature films and documentary films at the time when directors raised important social and historical issues that occurred in the state. The docudrama prototype emerged long before the invention of television and is associated with the first newsreels and films of E. Curtis and R. Flaherty. This experiment had developed greatly with the advent of television, which is characterized by a combination of intimacy, focus on close-ups and the ability to tell stories based on real events. The article highlights the formation of documentary drama on BBC that explored all spheres of life with great interest - from British culture and history to social and political topics. The article traces the popularity and relevance of docudrama at the present stage and its settlement into a stable form. This allows to establish docudrama as an independent form of screen arts. The article studies also the formation and development of docudrama in Belarus that is first of all connected with the director Vladimir Bokun.
STRATEGI PENGELOLAAN PENAMBANGAN PASIR LAUT YANG BERKELANJUTAN (STUDI KASUS PULAU TUNDA, PROVINSI BANTEN)
Authors: Wahyudi Wawan , Riani Etty , Anwar Syaiful
Published: November 2018

Penambangan pasir laut di pulau-pulau kecil, seperti Pulau Tunda, Kepulauan Seribu, Jakarta berpotensi mengakibatkan degradasi lingkungan. Penelitian ini bertujuan untuk mendapatkan strategi pengelolaan penambangan pasir laut di perairan Pulau Tunda yang berkelanjutan. Penelitian ini dilakukan wawancara dengan responden ahli yang dipilih secara purposive, dengan bantuan kuesioner. Data yang diperoleh dianalisis dengan AHP. Hasil penelitian menunjukkan bahwa faktor dominan yang harus diperhatikan pada pengelolaan penambangan pasir laut agar menjadi berkelanjutan adalah sumberdaya alam, kebijakan pemerintah, dan sosial ekonomi masyarakat. Stakeholders yang harus diperhatikan agar penambangan pasir laut menjadi berkelanjutan adalah pemerintah, pengusaha, masyarakat dan penegak hukum. Adapun tujuan yang harus didahulukan agar penambangan pasir laut berkelanjutan, yakni reduksi degradasi lingkungan, pemulihan ekosistem dan peningkatan daya saing keindahan wilayah perairan pulau kecil yang pasirnya ditambang. Prioritas alternatif strategi yang paling penting dalam pengelolaan penambangan pasir laut agar menjadi berkelanjutan adalah revisi kebijakan penambangan pasir laut, penegakan hukum dan sangsinya, serta teknologi penambangan pasir ramah lingkungan.
STRUKTUR POPULASI IKAN TERI HITAM Stolephorus commersonii DI TELUK PALABUHANRATU
Authors: Utami Nufaiza Fitri Chandra , Boer Mennofatria , Fachrudin Achmad
Published: November 2018

Ikan teri hitam Stolephorus commersonii merupakan salah satu ikan pelagis yang memiliki peranan penting dan berpotesi cukup besar bagi produksi perikanan di kawasan Teluk Palabuhanratu dibuktikan dengan jumlah hasil tangkapan berfluktuasi dengan kecenderungan meningkat. Aktivitas penangkapan ikan yang terus meningkat dan dikhawatirkan dapat membahayakan kelestarian sumberdaya, sehingga penetapan dan penerapan kebijakan pengelolaan sumberdaya ikan berkelanjutan mutlak harus dilakukan. Penelitian dilakukan untuk menganalisis reproduksi dan dinamika populasi ikan teri hitam. Pengambilan contoh dilakukan bulan Mei sampai September 2017. Analisis data terdiri dari nisbah kelamin, fase tingkat kematangan gonad, sebaran frekuensi panjang dan hubungan panjang dan bobot. Hasil penelitian menunjukkan bahwa ikan contoh yang diambil berjumlah 1838 ekor tidak seimbang dengan perbandingan jantan dan betina 1:1,7 atau 36,96% : 63,04%. Ikan dominan tertangkap pada selang kelas 48-56 mm sedangkan puncak tingkat kematangan gonad pada selang kelas 91-104 mm di bulan Agustus. Pola pertumbuhan ikan teri memiliki hubungan panjang bobot yang bersifat alometrik negatif didominasi oleh ikan yang masih muda dan seharusnya tidak boleh ditangkap, sehingga perlunya penutupan daerah atau musim penangkapan dan pengaturan mata jaring dan alat tangkap untuk mencegah kerusakan lingkungan perairan.
KANDUNGAN MAGNETIT DAN DISTRIBUSI SEDIMEN PADA PANTAI ANOI ITAM, PULAU WEH
Authors: Purnawan Syahrul , Kamal Irfan , Ilhamsyah Yopi , Agustin Sri , Octavina Chitra , Muhammad Adam
Published: November 2018

Keberadaan pasir besi dalam suatu wilayah memiliki peran ekonomis penting, umumnya dimanfaatkan sebagai bahan baku untuk industri. Di sisi lain, kandungan mineral dan magnetit dalam sedimen dapat digunakan sebagai bahan penjejak untuk menelusuri proses transport sedimen dalam suatu lingkungan perairan. Penelitian ini bertujuan memberikan gambaran pola distribusi magnetit di lingkungan Pantai Anoi Itam (PAI) yang berada di bagian timur Pulau weh, Kota Sabang. Analisis komposisi magnetit bersama dengan parameter ukuran butiran rata-rata, digunakan untuk mendeskripsikan pola sebaran pasir besi yang terbentuk pada kawasan PAI. Sampel sedimen diambil pada bulan Februari 2017 menggunakan coring pada 20 stasiun di sepanjang pantai (alongshore). Parameter ukuran butiran rata-rata diperoleh menggunakan metode ayak basah, sedangkan kandungan magnetit dihasilkan dari separasi menggunakan magnet kuat Neodynium tipe n-35. Sedimen PAI dicirikan memiliki tekstur yang agak kasar, dimana tipe pasiran dengan sedikit kerikil (Slightly Gravelly Sand) umum ditemukan. Diperoleh nilai ukuran butiran rata-rata sedimen antara 0,30 mm hingga 1,72 mm, dengan rerata (average) 0,74 mm. Magnetit memiliki nilai ukuran butiran rata-rata antara 0,31 mm hingga 1,82 mm, dan diperoleh rerata sebesar 0,76 mm. Keterdapatan magnetit ditemukan dalam persentase yang tinggi pada bagian utara PAI dan menjadi lebih rendah menuju bagian selatan, sehingga disimpulkan bahwa pola sebaran magnetit berasal dari bagian utara PAI.
PEMETAAN HABITAT BENTIK BERBASIS OBJEK MENGGUNAKAN CITRA SENTINEL-2 DI PERAIRAN PULAU WANGI-WANGI KABUPATEN WAKATOBI
Authors: Mastu La Ode Khairum , Nababan Bisman , Panjaitan James P
Published: November 2018

Penelitian pemetaan habitat bentik di Pulau Wangi-wangi masih sangat sedikit dilakukan, sehingga ketersediaan data spasial habitat bentik di daerah ini sangat terbatas. Penelitian ini bertujuan untuk memetakan habitat bentik perairan dangkal menggunakan citra Sentinel-2 dengan metode klasifikasi berbasis objek/OBIA dan menghitung tingkat akurasi hasil klasifikasi habitat bentik di perairan Pulau Wangi-wangi Kabupaten Wakatobi. Penelitian ini dilaksanakan di perairan Pulau Wangi-wangi, khususnya perairan Sombu Dive dan sekitarnya. Penelitian ini menggunakan data satelit Sentinel-2 dengan resolusi spasial 10x10 m2 yang diakuisisi pada tanggal 4 April 2017 dan pengambilan data lapangan dilakukan pada bulan Maret - April 2017. Klasifikasi citra dengan metode OBIA menggunakan metode contextual editing pada level 1. Level 2 menggunakan klasifikasi terbimbing dengan beberapa algoritma klasifikasi yaitu support vector machine (SVM), decision tree (DT), Bayesian, dan k-nearest neighbour (KNN) dengan input themathic layer dari data lapangan. Klasifikasi habitat bentik dilakukan pada 12 dan 9 kelas dengan penerapan optimasi skala segmentasi yaitu 1, 1,5, 2, dan 2,5. Berdasarkan metode OBIA, habitat bentik dapat dipetakan dengan tingkat akurasi sebesar 60,4% dan 64,1% pada citra klasifikasi 12 dan 9 kelas secara berturut-turut pada nilai optimum skala segmentasi 2 dengan algoritma SVM.
POTENSI KERUSAKAN TERUMBU KARANG PADA KEGIATAN WISATA SNORKELING DI DESTINASI WISATA TAMAN NASIONAL KARIMUNJAWA
Authors: Akhmad Dhanar Syharizal , Purnomo Pujiono Wahyu , Supriharyono Supriharyono
Published: November 2018

Wisata snorkeling di Taman Nasional Karimunjawa merupakan salah satu sektor wisata yang paling pesat perkembanganya saat ini di Karimunjawa. Semakin meningkatnya wisatawan snorkeling dapat menimbulkan tekanan ekologi terumbu karang pada lokasi snorkeling. Penelitian ini bertujuan untuk menentukan kontak langsung wisatawan snorkeling dan operator wisata terhadap kerusakan terumbu karang, penelitian ini dilakukan dengan mengikuti operator wisata. Kontak fisik yang paling sering dilakukan oleh wisatawan adalah sit stand kneel pada karang, sedangkan untuk operator wisata adalah penambatan perahu, pemberian pakan pada ikan, serta tidak menegur wisatawan. Nilai kontak fisik pada spot Ujung Bintang 0,029 individu per menit, nilai kontak fisik pada spot Maer 0,063 individu per menit, nilai kontak fisik pada spot Karang Sendok 0,038 individu per menit.
POTENSI DAN DISTRIBUSI SPASIAL IKAN DEMERSAL DI LAUT JAWA (WPP NRI-712) DENGAN MENGGUNAKAN TEKNOLOGI HIDROAKUSTIK
Authors: Mamun Asep , Priatna Asep , Suwarso . , Natsir M.
Published: November 2018

Salah satu upaya pengelolaan perikanan lestari membutuhkan informasi potensi dan pola penyebaran sumberdaya ikan di perairan. Penelitian ini bertujuan untuk menggambarkan secara spasial distribusi ikan dan menghitung potensi sumber daya ikan demersal di WPP NRI 712 (Laut Jawa) dengan metode hidroakustik, dan melihat perubahan biomassa ikan dalam kurun waktu 2011-2017. Hasil penelitian menunjukkan bahwa distribusi ikan demersal menyebar pada beberapa lokasi di utara perairan Cirebon, perairan Lampung timur, selatan Taman Nasional Tanjung Puting dan Kepulauan Seribu. Sumberdaya ikan demersal yang terdeteksi didominasi oleh ukuran ikan dengan kisaran panjang antara 30-31 cm dengan lima kohort sumberdaya ikan demersal. Biomassa ikan demersal sebesar 875.463 ton, dengan kepadatan ikan rata-rata yaitu 117,87 kg/km3. Potensi lestari ikan demersal sebesar 437.732 ton/tahun atau meningkat 36,6% dari potensi tahun 2015. Kepadatan ikan rata-rata dan biomassa mengalami peningkatan jika dibandingkan dengan tahun sebelumnya. Salah satu faktornya yaitu karena adanya waktu untuk ikan dapat melakukan pemulihan sumberdaya secara alami. Penerapan kebijakan pengelolaan dalam upaya pemulihan dan pemanfaatan perlu dilakukan untuk menciptakan perikanan yang lestari dan berkesinambungan.
THERMAL INSULATION PERFORMANCE OF STEEL FRAMED WALLS
Authors: Panasyuk I. V. , Kuznetsova O. O.
Published: November 2018

To determine metal stud wall systems with improved thermal insulation performance. Thermal transmittance of steel framed walls was analyzed using heat-transfer simulation program THERM 7.6. Thermal insulation performance of various configurations of metal stud walls has been evaluated. Approaches to enhance thermal insulation performance of steel framed walls were determined. The work results can be used in designing new energy efficient building.
ANALISIS KONTRAK KERJA DI KANTOR NOTARIS: TINJAUAN UNDANG-UNDANG NOMOR 13 TAHUN 2003 TENTANG KETENAGAKERJAAN
Authors: Efendi Zaenal , Susetiyo Weppy
Published: November 2018

AbstrakNotaris dalam menjalankan kewenangan dan kewajibannya sangat memerlukan bantuan tenaga kerja yang dalam hal ini adalah pekerja/karyawan notaris. Hubungan kerja antara Notaris sebagai pemberi kerja dengan pekerja timbul berdasarkan kontrak/perjanjian kerja. Ada dua jenis kontrak kerja yaitu perjanjian kerja untuk waktu tertentu (PKWT), dan perjanjian kerja waktu untuk tidak tertentu (PKWTT). Masing-masing bentuk perjanjian/kontrak kerja akan menimbulkan akibat hukum yang berbeda. Field research dikantor Notaris Sulin, S.H., M.Kn. Kota Blitar, Jawa Timur dilengkapi dengan library research menghasilkan penelitian bahwa bentuk kontrak kerja di kantor Notaris Sulin, S.H., M.Kn. Blitar adalah perjanjian kerja waktu tidak tertentu yang hanya menggunakan karyawan tetap, dengan  pelaksanaan dan penerapannya sesuai dengan amanah Undang-Undang Nomor 13 Tahun 2003 tentang Ketenagakerjaan.
Estudo da estrutura fatorial e das qualidades psicométricas da versão portuguesa da Male Body Attitude Scale-Revised
Authors: Ferreira Cláudia , Marta-Simões Joana , Oliveira Sara , Duarte João
Published: November 2018

Objetivo: A literatura demonstra que a imagem corporal é uma dimensão central de auto e heteroavaliação e um foco de preocupação não só para as mulheres, mas também para os homens. Diversos autores têm sublinhado a necessidade de um maior investimento no desenvolvimento e validação de instrumentos de medida para a imagem corporal para o sexo masculino, dado que homens e mulheres se distinguem significativamente em relação às preocupações associadas à aparência física. A Male Body Attitude Scale-Revised(MBAS-R) é a versão revista de um instrumento de medida (MBAS), especificamente desenvolvido para a população masculina, que visa avaliar as atitudes e preocupações em relação à imagem corporal. O presente estudo visa estudar a estrutura fatorial e as propriedades psicométricas da versão portuguesa da MBAS-R.Métodos: O estudo foi conduzido numa amostra constituída por 222 homens da população geral portuguesa, com idades compreendidas entre os 18 e os 65 anos.Resultados: Os resultados de uma série de análises fatoriais confirmatórias demonstraram a adequação da versão portuguesa da MBAS-R (12-itens) com uma estrutura de dois fatores (massa muscular e massa gorda). A análise dos itens da versão portuguesa da MBAS-R revelou que todos os itens contribuem consistentemente para a respetiva subescala e para a medida global. Adicionalmente, tanto a escala total como as subescalas da versão portuguesa da MBAS-R revelaram boa consistência interna. Os resultados mostraram ainda que as preocupações e atitudes em relação à imagem corporal, avaliadas pela MBAS-R, se associam positivamente a vergonha externa, vergonha corporal e inflexibilidade alimentar.Conclusões: Os resultados sugerem que a MBAS-R é uma medida breve e válida para avaliar e caraterizar as preocupações masculinas em relação à imagem corporal de um modo global e, simultaneamente, especificamente em relação a duas dimensões centrais da vivência da imagem corporal (massa muscular e gordura corporal) nesta população.
Quantification of the biological age of the brain using neuroimaging
Authors: Cole James Howard , Franke Katja , Cherbuin Nicolas
Published: November 2018

The cosmetic and behavioural aspects of ageing become increasingly apparent with the passing years. The individual variability in physical ageing can be immediately observed in people’s face, posture, voice and gait. In contrast, the pace at which our brains age is less obvious, only becoming apparent once substantial neurodegeneration manifests through cognitive decline and dementia. Therefore, a more timely and precise assessment of brain ageing is needed so its determinants and mechanisms can be more effectively identified and ultimately optimised. This chapter describes new approaches aimed at quantifying the biological age of the brain, so-called ‘brain age’; reviews how brain age can be contrasted to chronological age to index risk of premature brain ageing; and explores how brain age can be used to investigate genetic, environmental, health, and lifestyle factors contributing to accelerated ageing. Particular attention is given to the statistical approaches underpinning brain age, evaluating their validity and limitations. The developing brain-age literature covering diverse populations, all stages of life, health and psychopathology, humans and animals, is critically and comprehensively presented. Finally, gaps in our knowledge and unresolved methodological issues are summarised, alongside proposing future directions and highlighting opportunities for further research in this promising and exciting field.
Good Corporate Governance Approach to the Budget Identification of Medan City Government
Authors: Siahaan Andysah Putera Utama
Published: November 2018

The importance of this research to be done is to identify the leakage of the Medan city government budget, can minimize and prevent the level of budget leakage to increase the development of the city of Medan. The formulation of the problem is whether the identification of the principles of good corporate governance which includes transparency, accountability, responsibility, independence, and fairness can affect the leakage of the Medan city government budget and find out which variables are most able to prevent leakage of the Medan city government budget. The hypothesis in this study is the identification of the principles of Good Corporate Governance which include transparency, accountability, responsibility, independence and fairness which have a significant influence on the budget leakage of the Medan city government. Moreover, the variables that are most capable of preventing budget leakage are transparency and responsibility. The purpose of this study is to analyze the identification of leakages in the Medan city government budget. Also, analyze which variables most influence the leakage of the Medan city government budget. The type of research conducted is descriptive analytical. The population and sample used were all Medan city government services with the 2016 study year to 2017. The analysis technique used was multiple linear regression using SPSS software.
Monte Carlo Simulation in Prediction of Periodical Sales
Authors: Siahaan Andysah Putera Utama
Published: November 2018

Sales prediction is a budget that contains estimates about the activities of a company within a specified period to come and contains estimates of the state or financial position of the company in the future. The outcome of a sales prediction is a statement or assessment that is quantified against future conditions regarding sales as a technical projection of potential consumer demand for a certain period. However, the estimated results obtained may not be the same as the plan. The Monte Carlo simulation is also known as the Sampling Simulation or the Monte Carlo Sampling technique. Sampling Simulation illustrates the possibility of using sample data in the Monte Carlo method and its probability can be known or estimated. This simulation uses valid data in previous periods. The data is used to predict the possible results that will occur in the coming period. The purpose of this simulation is to estimate the profitability of a company to sell.
Technique of Hiding Information in Image using Least Significant Bit
Authors: Siahaan Andysah Putera Utama
Published: November 2018

Information hiding is very important because a lot of data theft occurs which can result in significant losses. Data security can be done by hiding information into a media. This media can be in the form of images or sounds. There are several concealment techniques in the picture. In this study, we will discuss the hiding of information in a 24-bit color image which consits of 3 x 8-bit. The method used is Least Significant Bit (LSB). This method is used to insert messages into the 24-bit color image insertion media on every 1 of the most significant bits of each image color. The layers used are Red, Green, and Blue. This method has a small MSE and does not appear to differ if the image is seen directly with the eye. The results of the research show that MSE calculation is not so much different from the original image. Peak Signal to Noise ratio (PSNR) for each image inserted with the maximum message size can produce an average value above 40 dB. This LSB method is excellent to use to provide information in the form of images.
Encryption of DES Algorithm in Information Security
Authors: Siahaan Andysah Putera Utama
Published: November 2018

Information security is the protection of personal and non-personal data from various threats to guarantee privacy. For business practices, data security can reduce business risk, and increase the return of investment and business opportunities. In designing information system security systems, there are information security aspects that need to be considered. Many threats will come before the information circulating. Information is a matter that will be targeted by wild parties. Cryptographic algorithms are needed to protect data from these threats. Data Encryption Standard (DES) belongs to the symmetry cryptography system and is classified as a block cipher type. DES operates on 64-bit block size. DES encrypts 64 plaintext bits into 64-bit ciphertext using 56 private key bits or subkeys. The internal key is generated from an external key that is 64 bits long. The DES method is an excellent cryptographic technique used to secure data. DES has 16 rounds to ensure safer data against unexpected attacks. Applying DES to data encryption will be very useful for protecting data.
An Effect of Unbalanced Load Usage of Electrical Equipment
Authors: Siahaan Andysah Putera Utama , Aryza Solly
Published: November 2018

Usage Unbalanced expenses are considered normal for electricity consumers and often found in the field. There are a lot of Distribution Substation of 20 KV installed to serve electricity users, and the lack of management of the installation of kWh Meter based on the profile of each customer that is different from each other, as well as the varying use of electrical energy in each customer causing an unbalanced distribution of Distribution Transformers. A raises another problem, namely the loss of electrical power due to an imbalance in the Electric Load in each phase. Therefore, the authors analyze the effect of load imbalances on the age of electrical equipment. Then apply the right steps to balance the transformer load, so that consumers are expected to understand the consequences of Electric Load Imbalance better.