bluuebunny/crossref_metadata_2025 huggingface dataset:
Buckling of Concentric String Pipe-in-Pipe
Authors: Li Changning , Samuel Robello
Published: October 2017

During the design stage of concentric tubular strings, the outer string is always considered to be rigid. However, in reality, the outer string can become displaced through contact with an inner buckled string. An analytical mathematical model was developed that includes this interaction effect and predicts the post-buckling behavior of a dual-string system in vertical wells. Case studies were conducted to compare the prediction results with previous models.

The post-buckling configurations are divided into two pre-assumed scenarios: sinusoidal buckling and helical buckling. An analytical mathematical model was developed to describe the post-buckling behavior of dual-string systems based on the minimum energy theory. The effect of contact interaction is considered in this model and evaluated during analysis. Variations of pitch, bending moment, bending stress, and total length change caused by buckling along the tubular can be evaluated using the new model. The model was verified with existing literature before application. A case study was performed to evaluate the improved prediction accuracy of the model during certain scenarios.

Two models exist for dual-string buckling—namely, the Christman (1976) and Mitchell (2012) models. The case study in this research determined that the Christman model tends to overestimate the stiffness of a dual-string system, thus leading to an unsafe design. The Mitchell model assumes an unrealistic space configuration for helical buckling, where the buckling is self-balanced and a dual-string system is independent of the wellbore. As a result, the Mitchell model cannot properly explain the influence of wellbore clearance on the buckling configuration. The new model properly solves these issues and provides a reliable prediction as a design reference. It is also observed that the outer string in a dual-string system tends to withstand more moments because of greater stiffness. Proper application of this new dual-string buckling model design can help reduce costs.
A Robust Finite Element Simulator for Black-Oil and Fully Compositional Compressible Flow in Hydrocarbon Reservoirs
Authors: Amooie Mohammad Amin
Published: October 2017

We present a unified numerical simulator for reservoir engineering problems of the highest complexity: fully compositional and black-oil, three-phase, compressible flow on three-dimensional unstructured grid.

In the context of black-oil modeling, where hydrocarbon components are lumped into a gas and an oil component with only the gas component being allowed to transfer between oil and gas phases, study cases may involve treating a variable bubble point pressure throughout the reservoir (e.g., in water flooding into saturated reservoirs, or introducing gas into an undersaturated grid cell). Traditionally, a primary variable switching strategy for phase appearance or disappearance has been proposed, which inherits convergence and phase identification issues. In this study, we adopt an overall molar composition-based framework that can self-consistently take care of such complications. We compute the black-oil properties from tables initially constructed through fully compositional phase split calculations. Phase properties across a broad range of pressures for different black-oil compositions are interpolated to correctly model the transitions between saturated and undersaturated states. While maintaining the accuracy, we are able to gain considerable speed-up in black-oil model -more pronounced in saturated reservoirs- as compared to the fully compositional model.

In addition, previous black-oil models are mostly limited to low order numerical schemes. Here finite element (FE) methods are adopted, which are well suited to parallelization and provide flexibility in discretizing the geometry. Mass transport is updated explicitly by a locally mass conserving discontinuous Galerkin method. Globally continuous pressure and velocity fields are obtained through an implicit mixed hybrid FE scheme. The robustness and accuracy of our FE simulator are demonstrated in several complex problems, where we have attained considerable speed-up and maintained the accuracy by means of the new black-oil model, specifically for phase split computations.
Identifying the Optimum Zone for Reducing Drill String Vibrations
Authors: Christian Etaje Darlington
Published: October 2017

Drilling operators witness significant lost time due to early failure of bottomhole equipment resulting from vibration and shock. This eventually leads to cumulative losses of millions of dollars for the industry. Increase in applied weight on bit (WOB) at low angular velocity (RPM) can trigger instabilities leading to stick slip. Potentially, compression and stretch that occurs along the BHA during drilling operations could lead to whirling and buckling. The complexity of the whirling motion causes lateral shifts, shocks and friction against the borehole walls.

The driller has limited options. If stick-slip is identified, the driller decreases weight-on-bit (WOB) but whirling may occur from increasing revolutions per minute (RPM). Since the overall goal is to optimize drilling then reducing both WOB and ROB would not be an option since that would results in decrease in rate of penetration (ROP). This puts the driller in a tough situation where both severe vibrations and low ROP could occur simultaneously during drilling operations.

There is an optimum zone where drilling parameters – RPM and WOB -- improve BHA/bit stability. A machine learning methodology is described which is able to (a) identify the zone of stability through the use of supervised and unsupervised learning and (b) anticipate an upcoming optimum for safe drilling by merging historic data with real time analysis through the use of online learning. A comparison is presented which compares supervised and unsupervised machine learning in identifying and updating the optimum zone. From this zone, a parameter set of permissible combinations of WOB and RPM can be estimated. The methodology described is then applied to data derived from several hours of drilling in a highly tortuous zone with persistent vibration problems.
Single-Phase Flow of Aqueous Polymer Solutions Used in Enhanced Oil Recovery: An Experimental and Numerical Approach
Authors: Long Marjohny Lorene
Published: October 2017

Chemical Enhanced Oil Recovery with polymer flooding allows to decrease the mobility ratio between oil and water and therefore increase the sweep efficiency in the reservoir through different mechanisms that take place, such as: pressure drops and viscosity changes of the injected fluid. The main objective of this work is to assess the friction factor coupled with the pressure drop evaluation, to define its impact in the polymer injection through porous media. The evaluation will allow the determination of the drag enhancement and drag reduction zones of the polymer solutions, which contributes to understand the additional oil recovery.

A total of 12 polymer solutions were selected for this investigation and to establish numerical and experimental comparisons. Two types of commercial hydrolyzed polymers (Flopaam 6035S and Hengfloc 63023) were used at three different concentrations (500, 1000 and 1500 ppm). The polymer solutions were prepared using two different approaches (induced mechanical degradation and non-sheared). Experiments were performed injecting the polymer solutions in Bentheimer core samples. The evaluation was performed using a fourfold approach: 1) Three different rheological models were applied (Ergun (1949), Tiu et al. (1997) y Al Fariss (1990)), to determine mechanical parameters such as friction factor, Reynolds number and Weissenberg number. 2) Detailed relationship between viscosity as a function of pressure drop. 3) Defining correlations between the viscoelastic behavior of polymeric solutions and pressure drop associated to each experiment. 4) Numerical analysis using CMG Stars simulator, allowing Absolute Average Error (AAE) calculation.

The additional increase in differential pressure indicates that shear and frictional forces are not the main determinants during the flooding process. The results indicate that the polymer viscoelasticity is the main reason of this increase while polymer undergo deformation. The work provides a comprehensive evaluation to characterize the pressure observed during the flow of polymer in porous media.
Application of Artificial Neural Network to Estimate Permeability From Nuclear Magnetic Resonance Log
Authors: Olayiwola Teslim
Published: October 2017

Many oil reservoirs have heterogeneity in rock properties. Understanding the form and spatial distribution of these heterogeneities is fundamental to the success of reservoir description. Permeability is one of the fundamental rock properties to characterize flow potentials of reservoir when subjected to applied pressure gradients. A number of mathematical models have been suggested in the literature to simulate and quantify this property. However, common to them is difficulties in being able to model appropriately various geological variations associated with any reservoir. This study explores the benefits of using artificial neural network and NMR log in the permeability predictive model development. ANN was used to capture the non-linearity issues between the dependent and independent variables while the transversal relaxation times (T2) data is capable of capturing intrinsic rock properties at pore scale level. Out of verified datasets available, 60% of the datasets were used for the training process and the remainder for testing and validation. The input data was transverse relaxation time data, its mean value of the bins, mean square value of the bins and the maximum value of the bins. The developed ANN was trained, tested and validated using MATLAB Neural network toolbox trained with backward propagation scheme. The result shows a very good performance of ANN when compared with other existing empirical correlations adopted in this study.
Flywheel micro-vibration characters of a high resolution optical satellite
Authors: Li Lin , Tan Luyang , Kong Lin , Yang Hongbo , Wang Dong
Published: October 2017

According to the pictures of a sub-meter resolution optical satellite which were acquired on orbit, there is a phenomenon of jitter in the process of taking pictures. As the main attitude control component of the satellite, the flywheel will produce the disturbance in its normal work, which has great influence on the high resolution optical satellite. This paper has respectively researched the flywheel components’ disturbance mechanism from four parts, including uneven rotator, rotator friction, bearing disturbance, foundation loose, and builds the mathematical model of disturbance to analyze the characteristics of disturbance. We have simulated and tested the flywheel components’ disturbance. The disturbance force of flywheel components is 2 N magnitude and the torque of disturbance is 1.5 N·m magnitude in time domain. The flywheel's infrastructure should be more inflexible especially around 90-100 Hz. For this target high resolution optical satellite, there should be effective damping measures around 48.6 Hz, 190.4 Hz and 285.4 Hz to decrease the flywheel disturbance to guarantee the high precision of the satellite. The result would offer guidance for system optimization design and vibration isolation compensation of the later type of improved satellite or other same type of satellites.
Influence of catwalk design parameters on the galloping of constructing main cables in long-span suspension bridges
Authors: Guo Pan , Li Shengli , Wang Chaoqun , Hu Yanan , Wang Dongwei
Published: October 2017

A main cable of a long-span suspension bridge is semi-surrounded by a catwalk during construction. Thus, design parameters of a catwalk may have influences on the galloping stability of a main cable during construction. To study the influence of catwalk design parameters on the galloping of steepled main cables, two main foci have been conducted. Firstly, the aerodynamic coefficients of the catwalk with actual design parameters are obtained by numerical simulation based on computational fluid dynamics (CFD), and the numerical results are compared with those of the previous wind tunnel test. Several typical main cables with different cross sections of a long-span suspension bridge during construction are selected, and their Den Hartog coefficients are obtained based on the numerical simulation considering the aerodynamic influences of the catwalks. Then four typical working conditions of a main cable which have great potential to occur galloping are selected based on the galloping analyze, and their aerodynamic coefficients considering the influence of the catwalk with different design parameters are obtained. The influence of the catwalk design parameters on galloping of the main cables is analyzed based on the Den Hartog criterion. Results indicate that catwalk design parameters have evident influences on aerodynamic coefficients and galloping of the main cables. The parameters of the catwalk which are favorable for suppressing the galloping of the main cables are determined, which establish a good guideline for the galloping-resistant design of the catwalk-main cable system on suspension bridges.
Characteristic analysis of vibration isolation system based on high-static-low-dynamic stiffness
Authors: Chai Kai , Lou Jingjun , Yang Qingchao , Liu Shuyong
Published: October 2017

The purpose of this study is to investigate the characteristics of vibration isolation system with a single degree-of-freedom (SDOF) and a two-degree-of-freedom (2DOF) respectively based on the high-static-low-dynamic-stiffness (HSLDS). This model consists of a simple configuration connecting a vertical spring and a pair of oblique springs. The restoring force of the isolation system is approximated to linear and cubic stiffness by applying the Maclaurin series expansion. The dynamic equations of the SDOF and 2DOF are established for the harmonic force excitation. The frequency-amplitude response equation of the SDOF is obtained by employing the harmonic balance method (HBM) and is demonstrated in the classical Runge-Kutta method. The solution stability is ensured by applying the Floquet theory. Effects on the frequency response curves (FRCs) for the damping ratio and excitation amplitude are explored and discussed. The force transmissibility (FT) is defined to evaluate the vibration suppression capability. Effects on the FT of the SDOF and 2DOF for the excitation amplitude, mass ratio, and damping ratio are investigated. An experimental investigation of the SDOF is carried out to evaluate the actual attenuation performance in comparison with the equivalent linear system (ELS). The simulation and experimental results show that the HSLDS system with harmonic force excitation demonstrates hardening stiffness with multi-valued solutions. The occurrence of jump phenomenon is observed and explained by the stiffness variation. The system response and resonance frequency are affected by the excitation amplitude and damping ratio. The HSLDS system outperforms the ELS in a low frequency range if an appropriate mass is mounted. It is excited by a proper force and owns a suitable damper, which offers a theoretical guidance for the design and application of a novel HSLDS isolator.
Multi-objective optimization for the aerodynamic noise of the high-speed train in the near and far field based on the improved NSGA-II algorithm
Authors: Yuan Chun Yan , Li Ming Qing
Published: October 2017

With the increased running speed of trains, the aerodynamic noise of trains becomes increasingly obvious. Reducing aerodynamic noises has become one of keys to controlling the noise of high-speed trains. This paper conducted a numerical simulation on the aerodynamic noise of head of the high-speed train. Firstly, this paper established a mathematical-physical model for the three-dimensional turbulent flow field of a high-speed train, adopted standard k-ε equation turbulent model and broadband noise source model to compute the aerodynamic noise sources of the high-speed train and applied three-dimensional transient large eddy simulation (LES) to compute the external unsteady flow field of the high-speed train after obtaining noise sources. Based on the unsteady flow field, then this paper applied FW-H equations to compute the far-field aerodynamic noise of the high-speed train. After obtaining the unsteady fluctuation pressure on the surface of the train, this paper computed the radiation characteristics of aerodynamic noises around the high-speed train based on the boundary element method (BEM). Researched results showed: The main aerodynamic noise sources of the high-speed train were at the nose tip of head train; fluid separation and recombination were main reasons for the aerodynamic noise of the high-speed train; vortexes in the position of head train were striped and horseshoe-shaped or hairpin vortexes were mainly in the area of tail train; in addition, vortexes were symmetrically distributed along the longitudinal symmetry plane of train; dipole noises were mainly distributed in the area of head train, whose main energy was decreased with the increased frequency; the quadrupole noise of aerodynamic noises of the high-speed train was mainly distributed in the wake flow area of tail train; when the high-speed train ran at the speed of 300 km/h, the maximum sound pressure level of far-field observation points was 76.8 dB; additionally, aerodynamic noises in the far field were mainly a broadband noise, whose main energy was within the frequency range of 1250 Hz to 3150 Hz. Finally, the improved NSGA-II algorithm was used to conduct a multi-objective optimization for the head shape. The aerodynamic drag of the high-speed train could be most reduced by 6.74 %, and the dipole aerodynamic noise source could be most reduced by 8.34 dB. The improved NSGA-II algorithm has an obvious effect on the multi-objective optimization of the head shape.
Pollution risk evaluation of regional groundwater based on sources apportionment of pollution
Authors: Zuo Rui , Chen Xiaojuan , Wang Bin , Shan Dan , Yang Jie , Li Xianbo , Wang Jinsheng , Teng Yanguo
Published: September 2017

Pollution sources are determined by source apportionment, and are used as human-influenced factors to calculate the pollution risk of regional groundwater. In this case study, 266 samples of shallow groundwater were collected from the Lower Liaohe River Plain in northeastern China. Hydrochemical indexes of NH4+, Ca2+, Cl−, F−, HCO3−, Pb, Mg2+, NO3−, NO2−, K+, Na+, SO42−, total Cr, chemical oxygen demand, total dissolved solids, and total hardness of each sample were determined. Factor analysis method was used to identify potential pollution sources. Five common factors (agricultural activities, groundwater extraction, industrial activities, river pollution, and sewage discharges) represented 77.10% of the total variance. The results showed that the relatively high pollution risk mainly occurred in the west, with 19.91% of the area. The southeastern area showed a low risk of pollution, covering only 1.07% of the study area. Clearly, human activities have significantly changed the distribution of regional groundwater pollution risk in the study area.
The San Marcos mélange, Cordillera Septentrional of the Dominican Republic. Nature, origin and age
Authors: Suárez-Rodríguez A. , Escuder-Viruete J. , Colmenero-Hidalgo E.
Published: October 2017

Understanding the nature, origin, and age of a mélange is crucial to deciphering the evolution of certain orogenic belts. Located in the Cordillera Septentrional of the Dominican Republic, the San Marcos Mélange is characterized by a blocks-in-matrix internal structure. Apparently arranged chaotically, the blocks have centimeter to kilometer sizes, include exotic ophiolitic, volcaniclastic, and intrabasinal sedimentary lithologies, and are of Cretaceous to Miocene in age, all immersed in a scaly and variably sheared argillaceous matrix. In less-deformed coherent sections, the Mélange consists of alternating sandstones, siltstones, and clays, indicative of a distal turbiditic depositional environment. Syn-sedimentary deformation is pervasive and produces systems of conjugated extensional shear fractures, veins filled with calcite, cataclastic bands, and boudinage and pinch-and-swell, symmetrical and asymmetrical structures. They are consistent with a layer parallel extension, produced in a low-energy slope setting, and indicate a low-ductility contrast between few or no lithified lithologies. Paleostress analysis of fractures and veins establishes a NE-SW trend of sub-horizontal extension, suggesting an orientation of the basin along a WNW-ESE to NW-SE axis (current coordinates). The biochronological data of nannofossils present in the matrix gives a sedimentary age for the Mélange from, at least, the top of the lower Miocene to the base of the upper Miocene.
The San Marcos Mélange has therefore an essentially gravitational origin. Its deformation was temporally syn-sedimentary and was produced by processes of gravitational sliding, probably triggered by both instability processes within the basin and tectonic (earthquake shaking) mechanisms. Blocks and megablocks of ophiolitic rocks derived from the underlying Puerto Plata complex and of well-lithified, volcaniclastic and sedimentary rocks of the Imbert Fm, represent "exotic" blocks caused by the gravitational collapse of the high topographically margins of the depositional basin, slide down, and emplaced into the unconsolidated slope and basin turbiditic deposits, at least in the lower and middle Miocene. The existence of a large-scale, syn-sedimentary shearing surface directed to-the-ONO at the basal contact suggests that the whole Mélange was displaced once or several times in that direction, contributing to the chaotic nature of the unit. The San Marcos Mélange is not a subduction-zone mélange, but was caused by the submarine landslide of turbiditic sediments in a syn-collisional, piggy-back basin, transported on top of a supra-subduction zone ophiolite of the Caribbean plate.
Paleogeographic evolution of eastern Hispaniola
Authors: Díaz de Neira J. A. , Braga J. C. , Mediato J. , Lasseur E. , Monthel J. , García-Senz J. , Hernaiz P. P. , Pérez Cerdán F. , Lopera E.
Published: October 2017

The geological record of Hispaniola documents a continuous increase in island surface since the Early Pleistocene due to the emergence of marine deposits. In eastern Hispaniola, the Llanura Costera del Caribe and the Los Haitises regions formed by the emergence in the Early-Middle Pleistocene of limestone of the Los Haitises Formation, and marls and marly limestone of the Yanigua Formation (Pliocene-Early Pleistocene). These formations were both deposited on the platforms surrounding the precursor relief of the Cordillera Oriental. In the Coastal Belt of the Llanura Costera del Caribe, continued uplift and Pleistocene global sea-level changes are reflected by two main stepped depositional terraces comprising reef limestone of the La Isabela Formation. Radiometric dating indicates the lowest terrace of the La Isabela Formation (Lower Surface of the Llanura Costera del Caribe) formed during MIS 5e in the Late Pleistocene. The age of the Upper Surface of the Llanura Costera del Caribe estimated by extrapolation of uplift rates deduced from the age of the lowest terrace is consistent with the available biostratigraphic age (Early Pleistocene) for the last deposition phases of the Los Haitises Formation. Correlation of the Upper Surface with erosional surfaces in the Cordillera Oriental and the Los Haitises region allows a reconstruction of the palaeogeographic changes in eastern Hispaniola during the Quaternary.
Geology applied to the study of seismic microzoning of Santiago de los Caballeros, Dominican Republic
Authors: Llorente Isidro M. , Belvaux M. , Bernardez E. , Bertil D. , Fernández Merodo J. A. , Laín Huerta L. , Lopera Caballero E. , Muñoz Tapia S. , Roullé A.
Published: October 2017

After the Haiti quake of 2010 an initiative started to better understand shaking effects in the Dominican Republic after natural earthquakes, in particular in the city of Santiago de los Caballeros, the second city in the country as far as inhabitants and economic wealth are concerned. Santiago has suffered several devastating earthquakes; in 1562 the city was rebuilt on a new site (the current location) further south from the responsible fault. It is well known that damage caused by an earthquake occurs associated to a number of factors, ground acceleration is one of them and is usually considered as the key to explain most of the damage. Ground acceleration varies from one point to another depending mainly on: distance to the source of the rupture, soil properties and topography. Regarding the distance, the further from the source the less acceleration is expected due to distance attenuation. On the other hand, different soil properties and different topographies will produce different responses to the propagating wave. Within the range of a few kilometres, the effect of distance attenuation might be far less relevant than the effect of the varying properties of soils. This paper gathers together results obtained from the seismic hazard and microzonation studies developed in the city of Santiago: i) quantification of regional seismic hazard dominated by the Septentrional fault, ii) a new geological mapping of superficial formations, and iii) mapping of zones of homogeneous seismic response and liquefaction susceptibility.
Co-Occurrence of Plasmid-Mediated AmpC β-Lactamase Activity Among Klebsiella pneumoniae and Escherichia Coli
Authors: Zorgani Abdulaziz , Daw Hiyam , Sufya Najib , Bashein Abdullah , Elahmer Omar , Chouchani Chedly
Published: October 2017

Introduction:

Extended-spectrum β-lactamases (ESBLs), including the AmpC type, are important mechanisms of resistance among Klebsiella pneumoniae and Escherichia coli isolates.

Objective:

The aim of the study was to investigate the occurrence of AmpC-type β-lactamase producers isolated from two hospitals in Tripoli, Libya.

Methods:

All clinical isolates (76 K. pneumoniae and 75 E. coli) collected over two years (2013-2014) were evaluated for susceptibility to a panel of antimicrobials and were analyzed phenotypically for the ESBL and AmpC phenotype using E-test and ESBL and AmpC screen disc test. Both ESBL and AmpC-positive isolates were then screened for the presence of genes encoding plasmid-mediated AmpC β-lactamases by polymerase chain reaction (PCR).

Results:

Of the K. pneumoniae and E. coli tested, 75% and 16% were resistant to gentamicin, 74% and 1.3% to imipenem, 71% and 12% to cefoxitin, 80% and 12% to cefepime, 69% and 22.6% to ciprofloxacin, respectively. None of the E. coli isolates were multidrug resistant compared with K. pneumoniae (65.8%). K. pneumoniae ESBL producers were significantly higher (85.5%) compared with (17.3%) E. coli isolates (P <0.0001, OR=4.93). Plasmid-mediated AmpC genes were detected in 7.9% of K. pneumoniae, and 4% E. coli isolates. There was low agreement between phenotypic and genotypic methods, phenotypic testing underestimated detection of AmpC enzyme and did not correlate well with molecular results. The gene encoding CMY enzyme was the most prevalent (66.6%) of AmpC positive isolates followed by MOX, DHA and EBC. Only one AmpC gene was detected in 5/9 isolates, i.e, blaCMY (n=3), bla
MOX (n=1), blaDHA (n=1). However, co-occurrence of AmpC genes were evident in 3/9 isolates with the following distribution:
bla
CMY and blaEBC (n=1), and blaCMY and blaMOX (n=2). Neither blaFOX nor blaACC was detected in all tested isolates. All AmpC positive strains were resistant to cefoxitin and isolated from patients admitted to intensive care units.

Conclusion:

Further studies are needed for detection of other AmpC variant enzyme production among such isolates. Continued surveillance and judicious antibiotic usage together with the implementation of efficient infection control measures are absolutely required.
Prevalence and Correlates of Metabolic Syndrome Among Adults Attending Healthcare Facilities in Eastern Cape, South Africa
Authors: Owolabi Eyitayo Omolara , Ter Goon Daniel , Adeniyi Oladele Vincent , Adedokun Aanuoluwa O. , Seekoe Eunice
Published: October 2017

Background and Aim:

Urbanisation and westernisation have greatly influenced the metabolic health of individuals in South Africa, with resultant increase in metabolic syndrome (METs) components. This study aimed to determine the prevalence and factors associated with METs among adults in Buffalo City Municipality, East London, South Africa.

Methods:

This was a healthcare facility-based cross-sectional, descriptive study. The World Health Organisation STEPwise demographic and lifestyle behavioural questionnaire was used to collect relevant data from 998 participants. Anthropometric measurements, blood pressure and fasting blood glucose were measured using standardised protocols. Metabolic syndrome was diagnosed using the International Diabetes Federation criteria.

Results:

The prevalence of metabolic syndrome was 21.8%; 15.6% and 24.8% among males and females, respectively. The prevalence of METs was higher among participants who were aged 56 years and above, with low level of education (grade 1 – 7), married and retired. After adjusting for confounders, only age 26 and above (AOR=4.1, CI=2.0-8.4), marriage (AOR=2.3 CI=1.6-3.3), female sex (AOR=1.6, CI=1.1-2.4), alcohol use (AOR=2.0, CI= 1.3-3.1), unemployment (AOR=1.8, CI= 1.2-2.6) and earning an income below ZAR1200 (AOR= 1.1, CI= 1.1-2.4) were significant and independent predictors of METs. Participants aged 26 and above were four times more likely to have METs. Married non-alcohol users and unemployed participants were two times more likely to have METs than unmarried alcohol users and employed individuals.

Conclusion:

There was a high prevalence of metabolic syndrome among the participants which indicates a high risk for cardiovascular diseases; a leading cause of premature morbidity and mortality.
Natural resistance of four Amazon woods submitted to xylophagous fungal infection under laboratory conditions
Authors: Reis Alisson Rodrigo Souza , Reis Luciane Pereira , Alves Júnior Miguel , Carvalho Josiane Celerino de , Silva Jhonata Ribeiro da
Published: September 2017

The present study aimed to assess the natural resistance of four Amazon tropical wood species, used in the production of sawn timber, against infection with xylophagous fungi. Apuleia leiocarpa (amarelão), Dinizia excelsa (angelim vermelho), Vochysia maxima (quaruba), and Bagassa guianensis (tatajuba) were selected to perform the accelerated laboratory test. These species were exposed to white rot xylophagous fungi Pycnoporus sanguineus, Phanerochaete chrysosporium and Schizophyllum commune, and to the brown rot fungus Gloeophyllum abietinum. The laboratory test was performed following the methodology and classification of the natural resistance of wood according to ASTM D2017-86 (American Society for Testing Materials). All species were classified as highly resistant to fungal attack; however, V. maxima lost the highest percentage of weight. Therefore, we recommend that D. excelsa, A. leiocarpa, and B. guianensis be used in the production of sawn timber since they exhibited lower weight loss in the presence of all the fungi tested during a period of 12 weeks.
EKOGENOTOKSISITAS LIMBAH CAIR BATIK DAN EFEK ANTIMUTAGENIK Lemna minor TERHADAP ERITROSIT IKAN NILA (Oreochromis niloticus)
Authors: Tyastuti Erma Musbita , Astirin Okid Parama , Sunarto Sunarto
Published: October 2017

Limbah cair batik di Solo sebagian besar dibuang langsung ke perairan tanpa diolah terlebih dahulu dan menyebabkan pencemaran air. Kandungan logam berat di dalam limbah cair batik dapat memicu efek genotoksik seperti pembentukan mikronukleus. Lemna minor berpotensi sebagai antimutagen dan mencegah pembentukan mikronukleus karena mengandung senyawa aktif seperti karoten dan asam amino. Penelitian ini bertujuan untuk mengetahui ekogenotoksisitas limbah cair batik dan efek antimutagenik Lemna minor terhadap eritrosit ikan nila. Penelitian dilakukan di Laboratorium Biologi UMS dengan pemaparan limbah cair batik 0ppm/L, 2500 ppm/L, 5000 ppm/L dan 7500 ppm/L terhadap 2 kelompok ikan nila dengan diet pelet dan Lemna minor. Hasil penelitian menunjukkan bahwa paparan limbah cair batik memicu pembentukan mikronukleus dengan frekwensi tertinggi pada konsentrasi paparan 7500 ppm/L. Lemna minor juga terbukti memiliki potensi antimutagenik karena mampu menekan frekwensi mikronukleus lebih rendah dibandingkan diet pelet.
PERGULATAN IDENTITAS KULTURAL ANTARA FASTFOOD DAN KUDAPAN
Authors: Arifin Ferdi
Published: October 2017

This article aims to identify a society’s identity though its culinary aspect. Nowdays,fastfood has been favourite food dominating traditional one. Youth generationpriorities fastfood than traditional food because they regard it more prestigious.Thisphenomenon can not be separated from the uses of Mass media as an important wayto convey foreign product of fastfood as better culinary than local product (kudapan)selling in traditional market. This research uses qualitative methode such as libraryresearch and observation to analyze the phenomena which is happening. The findingof this research implied that cultural identity can be seen in culinary. Cultural identityin culinary is showed by its substance and making process. Thus, the implication ofthis research is to convey the society to love their traditional culinary as a reflex ofcultural identity.
Kinerja Guru Bimbingan Konseling Dalam Penyusunan Rencana Program Layanan Melalui Pendampingan Supervisi Klinis
Authors: Karsono Karsono
Published: October 2017

This research is motivated by the unoptimally performance of teachers in a planning service program has so far not optimal. The research objective is to improve the performance of teachers in the planning service program in region Delanggu Klaten Working Group by 30 teachers. Methods of data collection using observation, documentation, and assignment of teachers in planning services program Analysis of data using a critical and comparative analysis. Indicators of success using the criteria limit minimal is 80, and the class completeness 100%. Research procedure uses cycles. From the results of research and discussion know that obtained summary data is the initial condition, Cycle I, II performance counseling teachers in planning services program, the initial conditions by an average of 75 and the first cycle an average of 80 and the second cycle by an average of 90 . from this data, it seems clear that an increase in the average value of the initial conditions to the first cycle of five digits (6.7%), from the first cycle to the second cycle an increase of 10 digits (12.5%), from pre cycle to the second cycle an increase of 15 digits (20%). The highest value of the initial stages of the condition by 84 and 90 as well as the first cycle of the second cycle of 98 It is clear that from the stage of initial conditions for the first cycle occurred from the initial conditions to the first cycle of six digits (7.1%), from the first cycle to the second cycle an increase of 8 digits (8.9%), and from the initial conditions to the second cycle an increase of 14 digits (16.7%). The lowest value obtained for the early stages of the condition of the first cycle of 67 and 72 and the second cycle of 87. thus, can be affirmed that the initial conditions of the stage to the first cycle an increase of 5 digits (7.5%), from the first cycle to the second cycle an increase of 15 digits (22.4%), and from the initial conditions to the second cycle an increase of 20 digits (29.9%). Percentage of performance criteria counseling teachers in preparing plan preparation program obtained from the initial conditions of 28% and the first cycle was obtained by 68% and the second cycle at 100%. It seems clear that the initial conditions of the stage to the first cycle an increase of 40%, from the first cycle to the second cycle an increase of 32%, and from the initial conditions to the second cycle an increase of 72%. Thus, teachers performance in counseling services from the initial conditions to the second cycle brought a significant rise.
Penerapan Strategi Kooperatif NHT dan TPS dalam Pembelajaran Matematika Ditinjau dari Adversity Quotient Siswa SMP
Authors: Muryanti Muryanti
Published: October 2017

Tujuan penelitian ini untuk mengetahui pengaruh strategi pembelajaran terhadaphasil belajar matematika ditinjau dari Adversity Qoutient (AQ) siswa. Strategipembelajaran yang dibandingkan adalah strategi pembelajaran kooperatif tipeNumbered Heads Together (NHT), strategi pembelajaran kooperatif tipe ThinkPair Share (TPS), dan strategi pembelajaran ekspositori. Penelitian ini merupakanpenelitian eksperimen semu. Populasi untuk penelitian ini adalah seluruh siswakelas VIII SMP Negeri 2 Sukoharjo. Pengambilan sampel dilakukan denganteknik sampling acak atau teknik sampling random (random sampling tecbnique).Diperoleh sampel berjumlah 95 siswa, dengan rincian 31 siswa pada kelompok eksperimen satu, 32 siswa pada kelompok eksperimen dua, dan 32 siswa kelompokkontrol. Instrumen penelitian ini adalah tes hasil belajar matematika dan angketAQ. Pengujian hipotesis menggunakan analisis variansi dua jalan dengan sel taksama. Berdasarkan hasil penelitian, diperoleh simpulan sebagai berikut. (1) Strategipembelajaran kooperatif tipe NHT memberikan hasil belajar matematika yang lebihbaik dibandingkan strategi pembelajaran kooperatif tipe TPS dan pembelajaranekspositori. Strategi pembelajaran kooperatif tipe TPS memberikan hasil belajaryang lebih baik dibandingkan strategi pembelajaran ekspositori pada materi bangunruang sisi datar. (2) Siswa kategori climbers mempunyai hasil belajar matematikayang lebih baik dibandingkan siswa kategori campers dan quitters. Siswa kategoricampers mempunyai hasil belajar matematika yang lebih baik dibandingkan siswakategori quitters. (3) Tidak terdapat interaksi antara strategi pembelajaran denganAQ siswa terhadap hasil belajar. Hal tersebut menunjukkan bahwa pengaruh strategipembelajaran terhadap hasil belajar matematika tidak tergantung pada kategori AQ.
MANAJEMEN KESAN MELALUI FOTO SELFIE DALAM FACEBOOK: STUDI FENOMENOLOGI PADA MAHASISWA ILMU KOMUNIKASI UMS
Authors: Mala Puspa Aqirul
Published: October 2017

This research explores about selfies phenomenon, especially how people managing their self-presentation through selfies on the Facebook. Computer Mediated Communications (CMC) and Erving Goffman’s Dramaturgi become basic theory in this research. Six informants were active uploaded their selfies and all of them are students of Communications Science in Muhammadiyah University of Surakarta. Phenomenology qualitative data result that informants are active managing their visual impression management on Facebook. They consider that Facebook is a stage and themself is an actor, so they can managing their selfies easily. Formed the charactheristic of CMC consist of: interactive, editable, de massified, and  asynchronity.
PENGARUH DESENTRALISASI FISKAL, SISTEM PENGENDALIAN INTERNAL DAN KINERJA PEMERINTAH DAERAH TERHADAP AKUNTABILITAS LAPORAN KEUANGAN
Authors: Purbasari Heppy , Bawono Andy Dwi Bayu
Published: October 2017

AbstractThis research aims to examine an impact of fiscal decentralization, internal control system, and local government performance examination to the local government financial accountability. As Local autonomy implemented in Indonesia in 1999, it has impacted to several financial reform in Indonesia such as fiscal decentralization calculation, new model of internal control system, new criteria of local government performance and also local financial report accountability. This study collected secondary data from Badan Pemeriksa Keuangan Republik Indonesia by using 117 local government in Java Island as population. The study used purposive sampling method that consists of 106 local government that were analyzed by linear regression by using SPSS 21. The result showed that internal control system has significant impact to the local government financial accountability. However, fiscal decentralisation and local government performance examination has no significant influence to local government financial accountability.Keywords: decentralisation fiscal, internal control system, local government performance, local government financial accountability.
The Phenomena of Organizational Structure Change as Change Factor of Financial Consultant’s Motivation
Authors: Poerbonegoro Galuh Adhitia , Setiawan Margono , . Sudjatno
Published: October 2017

Life insurance has developed into an attractive industry and has an important role in supporting businesses, families and communities. It grew into a business commodity that attracted many people. Competition in the life insurance industry is increasingly complex and competitive due to the number of life insurance companies made a lot of customers have many choices that requires every company to be more responsive to acquire customers, to support the organizational change, motivation and performance of employees. According to the first interview with top management, obtained information that there is a distance between superiors and subordinate in Allianz Life Indonesia’s new system, where Business Partner (leader) only served to control Business Executive and give freedom to the actions carried out by subordinates so that the relationship between them is less synergy. The purpose of research is to describe implementation strategies and the impact of OSC to Financial Consultant’s motivation. This study uses a qualitative research method. Research results obtained implementation strategy of OSC, which influenced by factors such as the driver of an effective and efficient work system, increasing of industry competition, and maintaining customer trust. There are two impact to Financial Consultant’s motivation include intrinsic motivation and extrinsic motivation.Keywords: Insurance, Organizational Structure Change, Motivation, Financial Consultant
PUBLICACIONES Y RECURSOS WEB PARA LA ENSEÑANZA DE LAS CIENCIAS EXPERIMENTALES
Authors: Velasco Sanz Ana María
Published: September 2017

Se han seleccionado algunas webs de organismos oficiales, portales de grandes Centros de Investigación, portales con recursos educativos sobre ciencia y tecnología, publicaciones sobre la educación científica en la escuela, del Consejo Superior de Investigaciones Científicas y de propuestas didácticas para la enseñanza de las ciencias en la escuela. Concluye en artículo con una relación de revistas sobre la enseñanza de las ciencias e investigación en didáctica de las ciencias.
The decreased of Streptococcus Mutans growth after topical application of phosphopeptide amorphous calcium phosphate paste
Authors: Araf Tika Faradina , Gartika Meirina , Dewi Warta
Published: October 2017

Casein Phosphopeptide-Amorphous Calcium Phosphate (CPP-ACP) paste is a topical application substance that consisted of a series of milk derivative peptide as a result of phosphorylation and has an antibacterial activity. The objective of this research was to find out the difference of Streptococcus mutans growth before and after CPP-ACP paste given topically to child's teeth. The method of the research was a quasi-experiment. Research samples were 10 students of MI Al Falah Islamic Boarding School, Jatinangor, West Jawa Indonesia and collected with purposive sampling technique. This research used dental plaque from child's teeth before and after applicated by CPP-ACP paste. The plaque was cultivated in selective media Tryptone Yeast Cysteine Sucrose Bacitracin (TYCSB) with repeated twice. Streptococcus mutans colony in TYCSB were counted by Stuart colony counter and statistically analyzed based on paired t-test. The results showed the average of Streptococcus mutans growth before applicated CPP-ACP paste was 57.05, whereas after applicated CPP-ACP paste for 1 days was 9.4; for 3 days was 2.85, and for 14 days was 1.7 colony. The research concluded that there was a decrease of Streptococcus mutans growth in isolate plaque after CPP-ACP paste topically given to child's teeth.
The role of yoghurt on dental erosion
Authors: Zayadi Alisa , Bikarindrasari Rini , Anastasia Danica
Published: October 2017

Dental erosion is defined as irreversible loss of dental hard tissue, caused by acid condition in the oral cavity without bacterial involvement. One of the signs of dental erosion is calcium dissolution of the enamel. Yoghurt is a fermented beverage that has low pH level due to lactic acid. The aim of this study was to measure the solubility of calcium enamel after soaking in yoghurt for 12 and 18 hours. Twenty-four premolars were divided into 4 groups. Group A and B were soaked in milk for 12 and 18 hours; group C and D were soaked in yoghurt for 12 and 18 hours. Atomic Absorption Spectrophotometer (AAS) was used to measure the solubility of calcium from each sample. Data were analyzed using one-way ANOVA and LSD (p < 0.05). This study indicated that soaking premolars in yoghurt for 18 hours has greater enamel calcium dissolution than in yoghurt for 12 hours. It can be concluded that prolonged soaking premolars in yoghurt will increase the calcium enamel dissolution.
The effects of temporo mandibular joint disorder with clicking symptom on children mastication performance in Deutero Malay race children aged 12-15 years
Authors: Hartman Henri , Pertiwi Arlette Suzy Puspa , Runkat Jakobus , Herdiyati Yetty , Oewen Roosje Rosita
Published: October 2017

Temporo Mandibular Joint Disorder (TMD) could be caused by forward head posture. Articular sound/TMJ clicking is the most often sign and symptom for TMD that could happen in human being. The presence of TMD such as TMJ clicking would cause an imbalance masticatory system. The purpose of this research is to investigate TMJ clicking effects to masticatory performance. This research was cross-sectional study with a type of epidemiology survey. Subject were children aged 12-15 years old Deutero-Malay sub-races Live in Bandung and was taken using multi-stage random sampling technique. Subject; consisted of 24 children as control group and 28 children as TMJ clicking group. Both group were then checked for masticatory performance using multiple sieve method and 20x chewing of artificial test food. Mastication performance value represented by median particle size (MPS) particle distribution (b) for each group. MPS from TMJ clicking group (3.0571,SD=0.9990) showed higher value than control group (2.28958,SD=0.66838). Statistic analysis with t-test showed that there’s a significant result in both of group (pvalue=0,0024, α = 0,05). Conclussion, temporo mandibular joint clicking subject has lower masticatory performance.