bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of Occupational Exposure to Heat Stress and Physiological Responses of Workers in the Rolling Industry
Authors: Mohammadian Farough , Sahl Abadi Ali Salehi , Giahi Omid , Khoubi Jamshid , Zarei Amin Allah , Boghsani Gholamheidar Teimori , Abbaspour Sedigheh
Published: April 2019

Background and Objective:

Many indices are used to assess occupational heat stress at the work environments. The aim of this study was to evaluate heat stress using Wet Bulb Globe Temperature (WBGT) index and Discomfort Index (DI), and by measuring physiological responses in the workers of the rolling industry and comparing the appropriateness of these indices for measuring heat stress.

Methods:

This cross-sectional study was carried out on 90 healthy workers of a rolling industry in eastern Tehran in 2017. Physiological parameters of core body temperature (Tcr) and Heart Rate (HR) were measured during the working shift according to ISO9886 standard. At the same time, environmental variables such as the natural wet temperature (Tnw), dry temperature (Td) and globe temperature (Tg) were measured and recorded at the workstations. Then, the DI and the WBGT indices were calculated using the related formulae. Data were analyzed using SPSS v. 21, t-test and Pearson correlation coefficient.

Results:

The mean heat stress indices were significantly higher in working conditions than resting conditions, and there was a significant difference between the physiological parameters of Tcr and HR in resting and working conditions (P<0.001). According to the screening criteria of DI, 43.3% of the workers were exposed to the moderate level and 56.7% to the severe level of heat stress. There was a significant difference between the mean WBGT and the Threshold limit values (t= 4.903, P<0.001). Pearson correlation test showed that there was a significant and direct linear relationship between the WBGT and the physiological parameters of Tcr and HR (r=0.317, P=0.002; r=0.434, P<0.001, respectively). The DI index had a significant and direct linear relationship with HR; (r=0.229, P=0.03).

Conclusion:

The results showed that WBGT is a more appropriate index for evaluating the heat stress of workers in the rolling industry. High heat stress levels at the workstations along with heavy physical activity are health risks for workers in this industry; therefore, interventions must be undertaken to reduce exposure.
Implementasi kurikulum pada sekolah penyelenggara pendidikan inklusif
Authors: Sebrina Anggia Ayu , Sukirman Dadang
Published: April 2019

Pendidikan di Indonesia saat ini sedang menuju pada sistem pendidikan inklusif sebagai salah satu bentuk komitmen pemerintah untuk memberikan hak pendidikan bagi seluruh anak dan perwujudan sekolah ramah anak. Kurikulum pada kelas inklusif dikembangkan dengan mengikuti kebutuhan dan kondisi masing-masing anak, dengan demikian kurikulum yang digunakan adalah kurikulum modifikasi. Penelitian ini adalah untuk melihat impelementasi kurikulum pada sekolah penyelenggara pendidikan inklusif. Pendidikan inklusif merupakan proses dalam merespon keberagaman kebutuhan perserta didik melalui peningkatan partisipati dalam belajar, budaya dan masyarakat. Setiap peserta didik dengan keberagamannya diterima dan mendapatkan layanan pendidikan yang sesuai. Kurikulum pada sekolah penyelenggara pendidikan inklusif tetaplah menggunakan kurikulum nasional, namun bagi peserta didik berkebutuhan khusus (PDBK) kurikulum perlu disesuaikan atau dimodifikasi mengikuti kemampuannya. Modifikasi kurikulum dilakukan pada komponen tujuan, isi, metode, alat/media pembelajaran, dan evaluasi hasil belajar. Penelitian ini dilakukan dengan menggunakan metode deskriptif, dan pendekatan kualitatif yang dilakukan di Sekolah Dasar Negeri piloting project penyelenggaran pendidikan inklusif di Kota Bandung. Peneliti menggali data menggunakan teknik wawancara, observasi dan studi dokumen. Kurikulum sekolah penyelenggara pendidikan inklusif menggunakan kurikulum nasional, namun bagi PDBK kurikulum dikembangkan secara individual dalam bentuk Program Pembelajaran Individual (PPI).
Modal Sosial Perempuan Dalam Peran Penguatan Ekonomi Keluarga
Authors: Puspitasari Dewi Cahyani
Published: April 2019

Eksistensi perempuan memiliki peran penting baik pada ranah domestik (keluarga) dan publik (masyarakat). Dalam perannya mengelola keuangan keluarga baik dari hasil nafkah suami maupun kerja produktifnya menjadikan perempuan sadar akan posisinya menjaga keberlangsungan ekonomi keluarga. Perempuan mampu mendayagunakan sumber ekonomi melalui pemanfaatan stok modal sosial yang dimilikinya berupa jejaring sosial dalam lingkungan sosial untuk mempertahankan bahkan meningkatkan ekonomi keluarga. Dari pengalaman pendampingan ekonomi perempuan usaha mikro, penulis mencoba mengkonseptualisasikan dalam kerangka fungsi dan peran modal sosial untuk penguatan ekonomi keluarga. Dengan demikian, pilihan saluran penghidupan perempuan dan keluarganya melalui pemanfaatan modal sosial menjadi peluang strategis dan produktif untuk menjaga daya tahan ekonomi keluarga.Kata Kunci: perempuan, modal sosial, ekonomi keluarga.
Kurikulum Dan Pendidikan Di Indonesia Proses Mencari Arah Pendidikan Yang Ideal Di Indonesia atau Hegemoni Kepentingan Penguasa Semata?
Authors: Perdana Dedi Ilham
Published: April 2019

Artikel ini bertujuan untuk menguak bagaimana problematika perubahan kurikulum dan pendidikan yang terjadi di Indonesia dari masa ke masa serta pengaruhnya pada masyarakat sekaligus memetakan berbagai isu terkait kurikulum baru 2013 serta dampaknya bagi dunia pendidikan saat ini. Hegemoni yang dilakukan pemerintah terkait perubahan kurikulum 2013 akan menjadi isu sentral dalam artikel ini sekaligus menganalisanya melalui pemikiran Antonio Gramsci.
Kuasa Pasar Dalam Pembentukan Identitas Aceh: Renegosiasi Identitas Lokal dalam Praktik Komersialisasi dan Konsumerisme Pasca Konflik dan Tsunami di Banda Aceh
Authors: Mujib Ibnu , Abdullah Irwan
Published: April 2019

Tulisan ini menunjukkan proses renegosiasi identitas lokal dalam praktik komersialisasi dan konsumerisme di Aceh. Dua praktik sosial ini muncul di Aceh sebagai akibat dari proses ekspansi pasar yang meluas pasca tsunami. Di mana faktanya telah didukung oleh egen-egen globalisasi yang merepresentasi pemikiran-pemikiran dan etos kapitalisme. Tidak saja itu, bahkan praktiknya berlangsung sebagai ideologi gerakan, bukan sekadar sebagai bentuk-bentuk praktik ekonomi politik yang berlangsung secara normal dan seimbang. Di sinilah bentuk dominasi pasar faktanya telah terlalu kuat mendominasi masyarakat terutama bagi yang tidak memiliki kekuatan modal ekonomi, politik, dan akses distribusi yang cukup, negara telah begitu saja perannya dapat dibeli dengan kekuatan-kekuatan kapital yang berkuasa. Bahkan dampaknya sampai melahirkan pergeseran pada identitas Keacehan, seperti bagaimana masyarakat Aceh yang sebelumnya memegangi prinsip-prinsip kekeluargaan, kebersamaan, kesetiakawanan, kepedulian, dan bahkan egaliter, kemudian dipaksa dan dibenturkan pada tradisi baru yang meletakkan etos transaksional dengan mengedepankan prinsip-prinsip individual, serta bergantung pada sistem ekonomi kapitalistis.
Sampyuh: Genealogi Konflik Industri Ekstraktif di Lanskap Masyarakat Agraris
Authors: Widyanta A.B
Published: April 2019

Berlatar gaduh ekonomi politik makro nasional, seputar renegosiasi kontrak tambang, tulisan ini hendak mengusung wacana tanding dari sudut bidik diametral, yaitu di tataran mikro kehidupan sosio-kultural warga seputar kawasan tambang. Upaya ini penting untuk memberikan kontra hegemoni atas diskursus politik makro yang cenderung bias ekonomi dan abai terhadap kompleksitas kehidupan warga, kekuatan politik riil, dengan segenap kontestasi kuasa multi-aktor di tingkat lokal. Berbasis pada systematisizing of experiences dari riset di kawasan tambang, tulisan terpilah ke dalam empat bagian: pertama, paparan akan mencuplik sekilas gaduh renegosiasi kontrak tambang termutakhir sebagai latar penjelas existing situation regulasi pertambangan di Indonesia. Kedua, tulisan akan membabar lini masa (timeline) berikut kronologi ringkas hadirnya Gold Mining Company (GMC) di “Bumi Timur”. Ketiga, tulisan akan mendedahkan pembalikan gaya hidup dan laten konflik yang senantiasa membayangi kehidupan warga seputar kawasan tambang. Keempat, tulisan akan menyajikan sejumlah refleksi kritis dan peta jalan pembangunan perdamaian dan pembangunan berkelanjutan ke depan.
Diagnostic Performance of Blood Pressure Measurement Modalities in Living Kidney Donor Candidates
Authors: Armanyous Sherif , Ohashi Yasushi , Lioudis Michael , Schold Jesse D. , Thomas George , Poggio Emilio D. , Augustine Joshua J.
Published: April 2019

Background and objectives

Precise BP measurement to exclude hypertension is critical in evaluating potential living kidney donors. Ambulatory BP monitoring is considered the gold standard method for diagnosing hypertension, but it is cumbersome to perform. We sought to determine whether lower BP cutoffs using office and automated BP would reduce the rate of missed hypertension in potential living donors.

Design, setting, participants, & measurements

We measured BP in 578 prospective donors using three modalities: (1) single office BP, (2) office automated BP (average of five consecutive automated readings separated by 1 minute), and (3) ambulatory BP. Daytime ambulatory BP was considered the gold standard for diagnosing hypertension. We assessed both the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC-7) and the American College of Cardiology/American Heart Association (ACC/AHA) definitions of hypertension in the cohort. Empirical thresholds of office BP and automated BP for the detection of ambulatory BP–diagnosed hypertension were derived using Youden index, which maximizes the sum of sensitivity and specificity and gives equal weight to false positive and false negative values.

Results

Hypertension was diagnosed in 90 (16%) prospective donors by JNC-7 criteria and 198 (34%) prospective donors by ACC/AHA criteria. Masked hypertension was found in 3% of the total cohort by JNC-7 using the combination of office or automated BP, and it was seen in 24% by ACC/AHA guidelines. Using Youden index, cutoffs were derived for both office and automated BP using JNC-7 (<123/82 and <120/78 mm Hg) and ACC/AHA (<119/79 and <116/76 mm Hg) definitions. Using these lower cutoffs, the sensitivity for detecting hypertension improved from 79% to 87% for JNC-7 and from 32% to 87% by ACC/AHA definition, with negative predictive values of 95% and 87%, respectively. Missed (masked) hypertension was reduced to 2% and 4% of the entire cohort by JNC-7and ACC/AHA, respectively.

Conclusions

The prevalence of hypertension was higher in living donor candidates using ACC/AHA compared JNC-7 definitions. Lower BP cutoffs in the clinic improved sensitivity and led to a low overall prevalence of missed hypertension in prospective living kidney donors.
Geomagnetic anomalies in the area of Popocatepetl volcano, Mexico
Authors: Kotzarenko A. , Yutsis V. , Grimalsky V. , Koshevaya S. , Kotsarenko Yu.
Published: April 2019

Geomagnetic anomalies of different nature observed in the area of Popocatepetl volcano are presented and analyzed in the current paper. The analysis reveals some anomalies considered to be of local volcanic origin: the EM background in the vicinity of the volcano was found to be significantly noisier than other reference stations; sporadic strong noise-like geomagnetic activity was observed in the H component; some geomagnetic pulsations were observed only at Tlamacas station (located 4 km near the volcano). Some noticeable changes in the evolution of the fractal index calculated for geomagnetic field may be connected to the presence of critical processes in the volcano dynamics.
Hydraulic parameters evaluation of the Pan-African aquifer by applying an alternative geoelectrical approach based on vertical electrical soundings
Authors: Arétouyap Zakari , Bisso Dieudonné , Larissa Méli’i Jorelle , Njandjock Nouck Philippe , Njoya André , Asfahani Jamal
Published: April 2019

The present article aims at determining hydraulic parameters of the Pan-African aquifer in the region of Adamawa-Cameroon, namely the transmissivity (T) and the hydraulic conductivity (K). For this, fifty vertical electrical soundings (VESs),including 14 performed near existing boreholes with known values of water resistivity, have been conducted in the region using the Terrameter ABEMSAS-1000 with a spacing of current electrodes (AB) varying from 2 to 600 m.The curve matching technique is used to set structural parameters then, an inverse technique algorithm fits both theoretical and field curves for each experimental. The transverse resistance TR and the transmissivity T for the interpreted 14 VES are computed, then used to establish two relationships: one between the modified transverse resistance (MTR) andthe transverse resistance (TR) and another between MTR and the transmissivity (T).This enabled to compute MTR (ranged from 1526 to 28209 ?.m² with an average of 7873 ?.m²),TR (ranged from 24 to 31350 ?.m² with an average of 7476 ?.m²), T (ranged from 4 to 17.4 m²/day with an average of 7.23 m²/day) and K (ranged from 0.07 to 0.74 m/day with an average of 0.31 m/day) values in the whole region. The approach used for this purpose is effective and exportable to other Pan-African regions in the world.
Identification of sealing potential through fault seal analysis: a case study of Badin area, Lower Indus Basin, Pakistan
Authors: Bin Nisar Umair , Rizwan Muhammad , Rustam Khan Muhammad , Farooq Muhammad , Nadeem Qureshi Shahid , Ashfaq Ahmed Khawar
Published: April 2019

The sealing potential of a fault can be originated from reservoir/nonreservoir rock juxtaposition. The present study focuses on the assessment of the sealing potential of the Lower Goru Formation of Badin area, Lower Indus Basin, Pakistan. The uni-directional force is one of the causes of leakage through the upper reservoirs of Lower Goru Formation, i.e. sand A, B and C and thus made a good seal as sand D. The fault properties associated with sealing capacity and leakage are estimated using algorithms. These algorithms are based on the juxtaposition of the reservoir rock against sealing lithology, deformation and present stage of stress regime within the fault plane relative to leakage. Time and depth contour maps of top of the Lower Goru Formation represent a half-graben structure showing uni-directional force in the area. An Allan-type diagram depicted a sand-sand juxtaposition for sand A and juxtaposition of sand A with sand B, thus eliminating any chances of sealing conditions. A similar diagram confirmed shale-sand juxtaposition for sands C and D. The juxtaposition diagram referred to an increase in shale gouge ratio (SGR) values from sand A to sand D with maximum values at sand D, thus classifying good fault sealing potential at sand D. Therefore, it is confirmed that sealing capacity of the fault (F2) increases from sand A (poor seal) where SGR = 0.44% – 0.9% and shale smear factor (SSF) = 0.23 – 1 to sand D (moderate seal) where SGR = 10% – 44% and SSF = 0.05 – 0.22 which means that sand D is more sealed than any other sand in the study area.
Probabilistic seismic hazard analysis in La Paz-Los Cabos, Mexico: The importance of active Quaternary fault segments
Authors: Ortega Roberto , Carciumaru Dana , Gutierrez Edahí , Huesca–Pérez Eduardo , Quintanar Luis
Published: April 2019

A study of Probabilistic Seismic Hazard Analysis (PSHA) in the southern part of the Baja California Peninsula, Mexico is presented. In this study, the contribution of Quaternary fault segments are analyzed including two faults that have been considered potentially active by some authors, but inactive by others, namely, La Paz and San José faults. Therefore, different scenarios were tested to compare the hazard estimation with the contribution of these faults and finally a logic tree was proposed to add the epistemic uncertainties. In addition, three dams situated around the study area were chosen: La Buena Mujer, La Palma and Santa Ines. The peak ground acceleration values (PGA) were compared for 50, 100 and 200 years at 10, 5 and 2% of exceedance. The combinations of periods with percentages of levels of exceedance were used as reference for different degrees of hazard assessments. The preferred model is presented in a classical PSHA logic tree. Contrary to expectations, it seems that it is not so important to include all the seismic sources as La Paz and San José faults in hazard assessment of engineering design because in this region the characteristic faults are not sensitive for lower rates. However, this is only a mere artifact of the arbitrary decision of using return periods as a degree of protection. The present results show that in the case of essential facilities 2% probability of exceedance in 200 years is the best for this specific region. It is necessary to perform paleoseismic studies in this region, to know if these geological faults are active because many important structures are located close to the studied faults.
Coseismic displacements and Mw estimation of the El Mayor-Cucapah earthquake, Mexico, from GPS source spectra
Authors: Robles-Avalos J. Carlos , González-Ortega J. Alejandro , González-García J. Javier , Vidal-Villegas J. Antonio
Published: April 2019

El Mayor-Cucapah earthquake Mw 7.2 on April 4, 2010, occurred on Mexicali Valley near the international border between California, USA and Baja California, Mexico. The objective of this paper was to examine GPS as a complementary tool for seismic studies and to estimate earthquake seismic moment and Mw. For this purpose the capabilities of high-rate GPS (5 Hz) data located in the northern part of the seismic rupture has been explored to obtain the kinematic coseismic displacements. GPS data were processed using Precise Point Positioning method with GIPSY-OASIS II software, then applying the Fast Fourier Transform to the position time series, spectral parameters, seismic moment and Mw were calculated. A good agreement was found in terms of signal correlation of the GPS displacements, by comparing strong-motion seismic records integrated to displacement, using filtering parameters for two sets of instruments. Kinematic GPS displacement spectra clearly shows the low frequency displacement spectral level (~0.2 Hz) when compared with double integration of strong-motion data. It is easy to calculate the static coseismic motion from GPS data, however it is very difficult to calculate it from strong-motion data. A simple earthquake source model is suitable for the GPS dataset used in this work, estimated on Mw=7.19±0.13, was in according with Mw 7.2 obtained in other studies of the El Mayor-Cucapah earthquake.
Inclusión productiva y social en Ecuador
Authors: Albuja Echeverría Wilson Santiago
Published: April 2019

La pobreza puede reducirse por dos vías: la generación de ingresos, y el acceso
a bienes y servicios públicos. El objetivo de este trabajo es proponer una metodología
para cuantificar la población que vive en doble inclusión, es decir, en inclusión productiva y social en Ecuador en el periodo de estudio 2009-2017. Los resultados
obtenidos señalan una asimetría entre el progreso social y el productivo. El avance
en materia de educación, vivienda y servicios básicos se contrasta con el desafío para
consolidar un empleo digno, situación que se agrava en el área rural. En 2017 a nivel
nacional, la doble inclusión registró 35.3%, la inclusión social no productiva 31.8%, la
inclusión productiva no social 6.8% y la exclusión 26%.
Geoecological aspects of civil engineering on the sands
Authors: Averkina Tatyana Ivanovna
Published: April 2019

Civil structures are often built on sands, which are widespread in the upper part of the geological section. These soils usually serve as a reliable basis for engineering structures, but under certain conditions can cause large complications and even endanger the life safety. Analysis and generalization of the construction experience allows us educe three groups of problems that need to be identified and addressed timely. Most of the problems are related to water-bearing sands. Water flows, breakthrough of pressure water and quicksand are very common phenomena that complicate the excavation of construction pits and the device of underground structures. To protect against groundwater is often used dewatering, which can disrupt the stability of the surrounding buildings in high-density urban development. The second group of problems is related to the process of suffusion. The most dangerous of its manifestations are suffusion failures, leading to emergency situations and sometimes to the destruction of structures. The third group of problems is caused by specific reaction of sands to dynamic impacts, in particular, by liquefaction of water-saturated sandy soils. The consequences of such a reaction can be very serious: the immersion of the structure in the ground, the uplift of piles or bridge supports, the float up of underground tanks, the uplift of liquefied soils from under the foundation until the formation of a building tilt or overturning of the structure.
Forecasting the environmental effects of air pollution with landfill gas in residential areas
Authors: Sauts Arthur Valerevich
Published: April 2019

In the article the prediction of ecological consequences of contamination of components of the landfill gas air to a residential building, located on the territory close to the landfill. A method for calculating the dispersion of landfill gas taking into account the influence of the building, based on the numerical solution of differential equations, heat transfer, Reynolds, exponential distribution, supplemented by corresponding models of turbulence, initial and boundary conditions. The technique allows to take into account the spatial heterogeneity of landfills and rolling pins as the source of the pollutant, as well as the process of penetration of polluted air into the interference. Performed software implementation and verification of the method on the example of the range “Novoselki” (Saint Petersburg) and the adjacent warehouse buildings and residential complex for the most unfavourable wind conditions taking into account the averaging over time. The ecological and toxicological analysis of landfill gas taking into account its main components, and also the analysis of carcinogenic and noncarcinogenic risk at chronic influence on the abstract person living in the room in which the air polluted by landfill gas penetrates is carried out. The results can be used to determine the amount of maximum permissible emissions of landfill gas components, the scale moat sanitary protection zones of landfills and dumps, detecting the identification of the most polluted places on the street and indoors, the health risk assessment of residents as a result of chronic action of toxic substances, the syndrome of “sick building” caused by penetration of contaminated air into the room through openings in the walling, the solution of applied problems of ecological safety of construction, housing and communal services and public health.
Types of dune terrain dynamics of Anapa bay bar: research based on airborne LIDAR data
Authors: Kravtsovа V.I. , Drugov M.D.
Published: April 2019

Analysis of dune terrain change at Anapa bay bar was carried out using repeated laser air scanning data collected in 2013 and 2015. Comparison of created difference DEM with detail landscape-morphological maps, compiled by digital air photos and satellite images, revealed various types of dune terrain dynamics and their distribution on the bay bar. Unused parts of bay bar, characterized by natural dynamics of dune terrain (wave erosion and blowing out at windward slopes and accumulation of sand plumes at leeward), occupied 46 % of the area. 10 % of the territory in areas of new construction are characterized by anthropogenic transformation (leveling surface with landforms destruction and filling up of marsh areas and lake basin). Areas, used for recreation, occupy 44 % of the bay bar and characterized by strong increase of destructive Aeolian processes – erosion at windward slopes and sand accumulation at leeward, – with dunes moving. Another effect of the anthropogenic impact – development of new forms of destruction (corridors of wind blowing out and waves moving, Aeolian and hydrogenic cones), which are common for seasonal-used areas with developed of extreme kinds of sports.
Application of information and communication technologies in modern Russian cadastral system
Authors: Pavlova V.A. , Uvarova E.L.
Published: April 2019

The authors describe modern trends in development of the cadastral system. The main features of the procedure of cadastral registration and software systems that act as accounting and registration of automated databases are highlighted. The technological process of maintaining the unified state register of real estate is analyzed in detail. The modern system of information electronic interaction in the real estate register is designated. The role of information and communication technologies in the Russian cadastral system is shown. The authors propose a classification of online services of Rosreestr in a number of ways. The fourth group of online services is allocated as the most promising as it provides opportunities to obtain additional information at the common activity fields of different Executive authorities. The authors conclude that changes in the cadastral system of the Russian Federation are greatly influenced by global trends which in turn are aimed at expanding the functions of the cadastre as an information basis of land management.
The impact of leadership style on employment in the context of an emerging economy
Authors: Mrwebi Viwe
Published: April 2019

The leadership styles such as transformational leadership and transactional leadership have captured the interest of scholars in the contemporary world of organisational behaviour since it is associated with the perceptions of supervision skills to the presence of retentions within the organisational setting. The primary objective of this study is to examine the impact of leadership style on employee retention in the South African automotive industry. A quantitative research design was employed. Non-probability sampling was used and 96 usable questionnaires were returned. The empirical results reveal that transactional and transformation leadership have positive influence on employee retention. Evidence shows that a leadership style is a powerful instrument that can be used to retain talent within the organisational settings. The main aim of this study was to determine the impact of leadership style on employee retention in the context of automobile sector. By using descriptive and inferential statistics, the study shows that there is a negative relationship between leadership style and employee retention. In particular, the study argues that transactional leadership style and transformational leadership style are forces that are needed in order to retain talents in the organisation settings. Furthermore, based on the findings, the study, therefore, recommends the implementation of both transformational leadership style and transactional leadership style in mitigating employee turnover in the automotive organisations in South Africa.
Revisiting the growth effects of government bonds in the emerging capital market.
Authors: Olaniyan Temitayo O. , Ekundayo Samuel O.
Published: April 2019

We revisited the effects of government bonds for the growth on the Nigerian capital market. Utilising time-series data obtained from the Nigeria Stock Exchange (NSE) annual reports for the period from 2010 to 2017, this study through the Generalised Method of Moments (GMM) regression estimator found that the value and the number of listed government bonds’ positively and significantly affect capital market growth in Nigeria. Furthermore, low capitalisation of government bonds negatively affects the growth of the market. The null hypothesis of the Hansen J-statistics is accepted; hence this implies that the IVs used in the GMM model is valid. We concluded that government bonds have positive and significant effects on the growth of the Nigerian capital market, thus government bonds have made the NSE All-Share Index grow over the period under investigation. Following the findings from the study, it was recommended, inter alia, that there should be more issuance of government bonds to the public and further to enhance the efficiency of the capital markets, both primary and secondary, while the funds raised from the capital market through government issuance should be channelled towards Nigeria’s productive sectors to promote an all-inclusive growth in the Nigerian economy.
Research on the performance improvement of a two-shaft gas turbine with a variable area nozzle power turbine
Authors: Li Shiyao , Li Zhenlin , Zhao Hongbin
Published: April 2019

Both an increase in atmospheric temperature and a decrease in atmospheric pressure can lead to the degradation of the maximum allowable power output (MAPO) or the thermal efficiency of a gas turbine. In order to reduce these adverse effects, this paper provides a simulated study on the improvement of the MAPO and the variations of the thermal efficiency due to the fuel flow and variable area nozzle control under different atmospheric conditions. Simulation results indicate that the MAPO increases with the power turbine nozzle area, while the thermal efficiency shows a parabola trend. With the same increment of the power turbine nozzle area, the improvement of the MAPO goes up as the atmospheric temperature rises and the decrease of thermal efficiency is alleviated. Analyses show that the slow degradation of the compressor isentropic efficiency is a key factor that enables the MAPO to increase significantly and the thermal efficiency to remain almost constant.
The study of a seasonal solar CCHP system based on evacuated flat-plate collectors and organic Rankine cycle
Authors: Gao Guangtao , Li Jing , Cao Jingyu , Yang Honglun , Pei Gang , Su Yuehong
Published: April 2019

The demands of cooling, heating and electricity in residential buildings are varied with seasons. This article presented a seasonal solar combined cooling heating and power (CCHP) system based on evacuated flat-plate collectors and organic Rankine cycle. The heat collected by evacuated flat-plate collectors is used to drive the organic Rankine cycle unit in spring, autumn and winter, and drive the double-effect lithium bromide absorption chiller in summer. The organic Rankine cycle condensation heat is used to yield hot water in spring and autumn, whereas supply heating in winter. The system thermodynamic performance was analyzed. The results show that the system thermal efficiency in spring, autumn and winter, ?sys,I, increases as organic Rankine cycle evaporation temperature, T6, and evacuated flat-plate collectors outlet temperature, T2, decrease. The maximum ?sys,I of 67.0% is achieved when T6 = 80?C and T2 =100?C. In summer, the system thermal efficiency, ?sys,II, increases first and then decreases with the increment of T2. The maximum ?sys,II of 69.9% is obtained at T2 =136?C. The system output performance in Beijing and Lanzhou is better than that in Hefei. The average output power, heating capacity, hot water and cooling capacity are 50-72 kWh per day, 989-1514 kWh per day, 49-57 ton per day and 1812-2311 kWh per day, respectively. The system exergy efficiency increases from 17.8-40.8% after integrating the organic Rankine cycle unit.
Suspended nanoparticles on mixed convection flow of a Jeffrey fluid due to a horizontal circular cylinder with viscous dissipation
Authors: Mohd Zokri Syazwani , Arifin Nur , Mohd Kasim Abdul , Salleh Mohd
Published: April 2019

The non-Newtonian Jeffrey fluid model describes the viscoelastic property that elucidates the dual components of relaxation and retardation times. Nonetheless, there has been considerable attention on its unsatisfactory thermal performance. The model of nanofluid is contemporarily in the limelight due to its superior thermal performance compared to the conventional fluid. The proposed study herein aims to examine the Jeffrey nanofluid model over a horizontal circular cylinder with mixed convection flow. The flow analysis is performed based on the Buongiorno model with the integration of Brownian motion and thermophoresis diffusion parameters. The influence of frictional heat is also accounted. The non-dimensional and non-similarity transformation variables are utilized to reduce the dimensional governing equations into three non-dimensional PDE. Subsequently, the obtained PDE are tackled numerically through the Keller-box method. Certain continent parameters are investigated with regards to the identified distributions. A comparative study is executed based on previous studies, which indicates good agreement with results of the current study. The findings specify that the transition of boundary-layer from laminar to turbulent flows happens for dissimilar values of mixed convection parameter, Deborah number, Brownian motion and Eckert number. In particular, the boundary-layer separates from cylinder for positive (heated cylinder) and negative (cooled cylinder) values of mixed convection parameter. Heating the cylinder defers the separation of boundary-layer, while cooling the cylinder carries the separation point close to the lower stagnation point.
Research on heat transfer characteristics of fractal-generated turbulence based on large eddy simulation
Authors: Duan Chengdong , Jiang Yuncong , Wu Nannan , Xu Qiwen , Wang Lijun
Published: April 2019

Turbulence plays an important role in the fields of heat and mass transfer and enhanced chemical reaction. In order to explore the effect of grid-generated turbulence on flow heat transfer, in this paper, three different fractal grid structures with the same blocking ratio ?, effective mesh size Meff and thickness ratio tr= t max/t min (Case1: The grid cross-section is a triangle, Case2: the grid cross-section is an inverted triangle, Case3:the grid cross-section is square, Case4:no grid) and without the grid were simulated based on large eddy simulation. The aim of this simulation is to explain the evolution characteristics and heat transfer mechanism of turbulent flow field under the four cases. The results show that, in the same initial condition, Case 2 can generate the highest turbulence intensity and the feature of heat transfer on the cylindrical surface is more uniform. In Case 3, the boundary-layer in the flow field is separated earlier, and more vortices are excited to enhance the heat transfer than other cases in the boundary-layer region. The surface average Nusselt number is 1.3 times than that of Case 4.
Scalar Speed Control of Induction Motors with Difference Frequency
Authors: OTKUN Ozcan
Published: April 2019

Speed monitoring of electric motors
has attracted the attention of many researchers from past to present. Induction
Motor (IM), which is one of the electric motor types, falls behind the nominal
speed in different loads. This study was conducted to increase the speed
control performance of IM. In the study, speed control of IMs was realized by
Difference Frequency (DF). The Scalar Control (SC) method was used in IM speed
control. In order to increase the performance of SC, the frequency information
received from IM was compared with the reference frequency. The resulting DF
was applied to the system input again. For the performance analysis of the
study; SC, PI + SC and DF + SC methods were compared. The results obtained from
the study simulated in Matlab software show that the proposed method can be
used in speed control.
Investigation of heat accumulation effects during deep hole percussion drilling by high power ultrashort pulsed laser radiation
Authors: Haasler Dennis , Finger Johannes
Published: April 2019

In the last few years, commercially available ultrashort pulsed (usp) laser systems have reached average powers of several 100 W, which makes them also interesting for enhancing traditional applications. For example, laser drilling, a conventionally melt-dominated process, would benefit from the advantages of an usp ablation process. Due to the small processing area in laser drilling, substantial heat accumulates already at a few Watts of average power. This heat accumulation creates melt but also increases the mean ablation rate at least 1 order of magnitude and could lead to a productive drilling process. In this study, the increase of the mean ablation rate in percussion drilling due to heat accumulation is examined for various metals and sample thicknesses for high average powers of up to 300 W and a pulse energy in the milliJoule range. Those investigations have not yet been performed in such detail. It is shown that by doubling the pulse energy the drilling time can be decreased by 2 orders of magnitude due to heat accumulation. This behavior is valid for various metals like steel or aluminum, despite their varying material parameters. By analyzing the influence of different repetition rates and focal diameters, it is shown that the predominant parameter to characterize the heat accumulation is the average power. No significant difference is observed if the average power starting from 20 W is set up by a high pulse energy or repetition rate. Stainless steel has a different behavior compared to the other investigated metals when the pulse duration is changed from 2 to 20 ps, which is caused by a modified plasma generation. For stainless steel, the drilling time is found to be describable with one empirical formula for the entire range of examined average power and sample thickness.
Factores que pueden influenciar la selección de una ingeniería como carrera dependiendo de las habilidades matemáticas de los estudiantes / Factors that influence students’ decisions to pursue engineering as a major for students with different mathematics abilities
Authors: Morán Soto Gustavo , Benson Lisa
Published: April 2019

Este estudio multimétodos busca lograr un mejor entendimiento de las razones que pueden motivar a un estudiante a seleccionar una carrera en ingeniería, poniendo énfasis en las diferencias que puedan existir entre alumnos con distintos niveles de habilidades matemáticas. Se recolectó información sobre las experiencias académicas y personales de 560 alumnos de una universidad pública de Estados Unidos mediante una encuesta. Esta información fue analizada por medio de pruebas estadísticas inferenciales, separando la muestra en grupos con habilidades matemáticas altas y bajas para comparar resultados y encontrar posibles diferencias entre estudiantes que seleccionaron una ingeniería como su carrera. Ser del género masculino mostró tener la influencia más significativa en la elección de ser ingeniero, seguido por tener una mejor preparación matemática; y estos resultados fueron más evidentes en el grupo de habilidades matemáticas bajas. Por otro lado, los participantes con habilidades matemáticas altas demostraron tener un interés genuino en las carreras de ingeniería y sus aplicaciones, mientras que los participantes con habilidades matemáticas bajas buscaban más el dinero y la posición social que les podía ofrecer un título de ingeniería.
PROFESSOR (NÃO) É EDUCADOR? EMBATES PELA IDENTIDADE DOCENTE NO CINQUENTENÁRIO DE “PEDAGOGIA DO OPRIMIDO”
Authors: Mutz Andresa Silva da Costa , Katz Elvis Patrik
Published: April 2019

É impossível ignorar a influência do pensamento de Paulo Freire na educação brasileira. Um dos maiores expoentes da crítica ao modelo educacional praticado ainda hoje, Freire tornou-se “leitura obrigatória” nos cursos de licenciatura, em especial a partir de fins dos anos de 1990 e início dos anos 2000, e inspirou muitos professores em suas práticas junto aos alunos da educação básica e ensino superior.Nos últimos anos, no entanto, parece estar se firmando no Brasil uma resistência bastante forte às proposições freireanas, fenômeno acompanhado por um ressurgimento e fortalecimento do pensamento conservador de modo mais amplo. No presente artigo, objetivamos descrever os embates entre esses dois discursos, nos perguntando acerca de seus efeitos sobre as identidades docentes, que cada vez mais são alvo de intensas investidas de poder. Lançamos mão de ferramentas teórico-metodológicas de inspiração foucaultiana para execução da análise. O material empírico selecionado está composto pelas obras Pedagogia do Oprimido, de Paulo Freire (1987) e Professor não é educador, de Armindo Moreira (2012). Os resultados evidenciaram que persiste e se intensifica, na atualidade, uma divergência significativa na concepção de educação e do papel do professor entre o ideário liberal/ neoliberal e a teorização crítica. Nesse sentido, nos colocamos a refletir acerca da função política da educação a fim de problematizarmos a neutralidade, nomeada como uma indispensável característica do professor por movimentos como o Escola Sem Partido. Por mais estranho que isso nos pareça, aprendemos com essa pesquisa, que aos que combatem Freire, parece possível ser professor sem educar.
RECURSOS EDUCACIONAIS ABERTOS (REA) COM PESQUISA E INOVAÇÃO RESPONSÁVEIS (RRI) PARA A PRODUÇÃO DE CONHECIMENTO EM POLÍTICAS EDUCACIONAIS: O CASO DO MESTRADO PROFISSIONAL EM GESTÃO E AVALIAÇÃO DA EDUCAÇÃO PÚBLICA
Authors: Borges Eliane Medeiros , Sanabio Marcos Tanure , Magaldi Juliana Alves
Published: April 2019

O trabalho propõe a análise e discussão sobre a utilização de Recursos Educacionais Abertos (REA) no Mestrado Profissional em Gestão e Avaliação da Educação Pública, como demonstração da viabilidade da interação de variadas mídias e recursos online no processo educacional, por meio dos quais alunos do Programa realizaram suas atividades e promoveram interações, tendo como referência sobre a aplicabilidade dos REA, a partir de estudos de Okada, Amiel, Nobre, Mallmann e Mendes. Este estudo exploratório reflete sobre como utilizar os REA (mapas do Litemap) como práticas pedagógicas ditas inovadoras, em contexto de cursos superiores.  A metodologia tem como base o conceito de pesquisa e inovação responsáveis (RRI) com as seguintes etapas: uso de REA, adaptação da prática pedagógica e transformação do ensino aprendizagem do projeto Europeu ENGAGE que promoveu a plataforma LiteMap para formação de educadores para RRI. São apresentadas duas experiências de atividades no Mestrado Profissional, com a utilização de REA, seu desenvolvimento e análise, sendo a primeira na Disciplina de Administração e Financiamento da Educação Pública e a segunda nas atividades de Qualificação dos mestrandos, em 2017 e 2018. Ambas as experiências, desenvolvidas de modo experimental, foram exitosas e se demonstraram oportunas para sua disseminação em todo o Programa de Pós-Graduação. Os resultados desse estudo sugerem que REA com LiteMap podem ser utilizados, adaptados e transformados num processo pedagógico que reúne conteúdos e métodos, como conhecimento construído nos mapas.
The Role Of Islamic Banks In Yemen In Supporting Microfinance Institutions
Authors: Salem Al-Harethi Abobakr Ramadhan
Published: April 2019

Islamic banks become the best solution to the crisis of the global financial system at present.in addition, it  become  also a real player in dealing with economic crises and the financial complexities of the traditional banking system prevailing in the world today. moreover, countries and governments in both developed and developing countries have become increasingly interested in the issue of microfinance because of their close association with the development in various countries and may be interested in supporting countries and governments for microfinance by enacting the necessary laws and legislation. And the establishment of institutions and bodies specialized in financing and support these microfinance in addition to the microfinance in many developed countries have become a specialty taught in universities and specialized institutes. Scientific seminars and conferences are held in order to support and develop it so that it achieves the objectives set for it and thus meets the aspirations of society in development. This study focus on the role of Islamic banks that can play an active and influential role in generating wealth and reducing poverty through financing for Microfinance institutions where the study showed the social role of the nature of contracts in Islamic banks through which Islamic banks can be the best in Microfinance. Keywords : Islamic banks, Microfinance institutions, Yemen
Kedudukan Jaksa sebagai Pengacara Negara dalam Lingkup Perdata dan Tata Usaha Negara
Authors: Yusuf Muhammad , Sampurno Slamet , Hasrul Muhammad , Arisaputra Muhammad Ilham
Published: April 2019

The term Prosecutor as a state lawyer is not clearly stated in the Prosecutor's Law. Implementation of the functions of the Prosecutor as state attorney in the civil and administrative sphere of the state follows the flow and procedures for settlement of civil disputes and state administration in general. To optimize the implementation of the Prosecutor's function as a state lawyer, the Prosecutor must be provided with education and training regarding civil law and constitutional law/state administrative law. Therefore, the institutionalization of the State Attorney Attorney is also needed so that if a lawsuit involving the interests of the state occurs, there will be no difficulty in appointing and determining the Prosecutor acting as the State Attorney.
Kedudukan Pelaku Usaha dan Konsumen dalam Hukum Perlindungan Konsumen (Produk Mi Soun Mengandung Klorin)
Authors: Lumban Gaol Heru Saputra , Prawitasari Fransisca Yanita
Published: April 2019

Food is one of the primary needs of humans. In terms of producing food, it cannot be completely separated from the use of Food Additives. Article 1 paragraph (1) of Law Number 33 Year 2012 concerning Food Additives determine Food Additives are ingredients added to food to affect the nature or form of food. This indicates that  Food Additives may affect the quality of the product. In practice, not all Food Additives are used by sellers safe for consumers' health. In fact, Article 4 letter a of Law Number 8 of 1999 concerning Consumer Law determines that consumers have the right to conveniences, security and safety in consuming goods and/or services. This is also in line with the seller's obligations that specified in Article 7 of the Consumer Law. A several cases of chlorine additives on mi soun at Klaten, Jember, and Jambi show a lack of awareness of sellers and consumers in recognizing which food additives are harmful for health. Consumer law as a progressive law strives to be a legal means that establish consumer awareness and sellers awareness in order to realize their rights and obligations. Progressive consumer law also indicates a balance between sellers and consumers in harmonizing the principles of caveat venditor and caveat emptor.
A BRIEF ANALYSIS OF THE PUBLIC INSTITUTIONS BUGET: THEORETICAL AND PRACTICAL APPROACHES
Authors: POP Ana Monica
Published: April 2019

In this paper, we will mainly focus on the new budgetary tendencies of the Public Institutions, financed entirely or partially from the state budget, in the desire to highlight the newest aspects found at the level of the activities carried out in the public sector. The article highlights the official data provided by the National Institute of Statistics on the Cluj County budget execution, structured by items of revenues and expenditures. The contribution of Cluj County was pursued both at national level, and at the level of the North-West region, based on a budget execution analysis for a period of 5 years, namely between 2013 and 2017. The article will also review the methods of substantiating the budgetary indicators, based on both classic and modern methods. The present article embeds the theoretical and practical aspects of public institution financing, being built from an interdisciplinary, economical and legal perspective, by using the integral research method that combines both quantitative and qualitative analyses. In order to accomplish this research, we will use the most relevant scientific resources of maximum topicality, implicitly the official data identified on the site of the Cluj County Council.
JEL classification: H60, H61, H72