PENGARUH IMPLEMENTASI PROGRAM PRAKERIN TERHADAP MUTU LULUSAN SMK

The phenomenon of the low quality of SMK graduates is the background of this research. The low quality of graduates is indicated by the fact that there are still aspects of graduate competency standards that have not been fulfilled. The causes include the inadequate implementation of the internship program. The purpose of this study is to determine: a) Implementation of Internship Program; b) Quality of SMK graduates; c) The magnitude of the influence of the implementation of the Prakerin program on the quality of SMK graduates. This study uses a quantitative approach with a survey method to examine a generalized sample. The data collection tool used a questionnaire, the data obtained were analyzed statistically. The design of the analysis is descriptive and subjective. The results showed that descriptively the implementation of the internship program was good, but there were still weaknesses in terms of provide feedback; The quality of graduates is also good, but there are still weaknesses in terms of application of values in life.. Perivikatively, the implementation of the apprenticeship program has a positive and significant effect on the quality of vocational graduates with a magnitude of influence of 40,70%, the remaining 59,30% is influenced by other factors. In conclusion, the implementation of the apprenticeship program has an effect on the quality of SMK graduates

An articulatory-functional approach to modeling Persian focus prosody

This paper is an attempt to test PENTA, an articulatory-functional model, on Persian focus prosody. The test was done on a corpus consisting of utterances with different focus conditions using PENTAtrainer2, a trainable prosody synthesizer that optimizes categorical pitch targets each corresponding to multiple communicative functions. The evaluation was done by comparing the F0 contours generated by the extracted pitch targets to those of natural utterances through numerical and perceptual evaluations. The numerical results showed that the synthesized F0 was close to the natural contour in terms of RMSE (= 1.94) and Pearson’s r (= 0.84). Perceptual evaluation showed that the rate of focus identification and naturalness judgement by native Persian listeners were highly similar between synthetic and natural F0 contours

Investigation of Hybrid Steam/Solvent Injection to Improve the Efficiency of the SAGD Process

Steam assisted gravity drainage (SAGD) has been demonstrated as a proven technology to unlock heavy oil and bitumen in Canadian reservoirs. Given the large energy requirements and volumes of emitted greenhouse gases from SAGD processes, there is a strong motivation to develop enhanced oil recovery processes with lower energy and emission intensities. In this study, the addition of solvents to steam has been examined to reduce the energy intensity of the SAGD process. Higher oil recovery, accelerated oil production rate, reduced steam-to-oil ratio, and more favorable economics are expected from the addition of suitable hydrocarbon additives to steam. A systematic approach was used to develop an effective hybrid steam/solvent injection to improve the SAGD process. Initially, an extensive parametric simulation study was carried out to find the suitable hydrocarbon additives and injection strategies. Simulation studies aim to narrow down hybrid steam/solvent processes, design suitable solvent type and concentration, and explain the mechanism of solvent addition to steam. In the experimental phase, the most promising solvents (n-hexane and n-heptane) were used with different injection strategies. Steam and hydrocarbon additives were injected in continuous or alternating schemes. The results of the integrated experimental and simulation study were used to better understand the mechanism of hybrid steam/solvent processes. Experimental and simulation results show that solvent co-injection with steam leads to a process with higher oil production, better oil recovery, and less energy intensity with more favorable economy. Solvent choice for hybrid steam/solvent injection is not solely dependent on the mobility improvement capability of the solvents but also reservoir properties and operational conditions such as operating pressure and injection strategy. Pure heated solvent injection requires significant quantities. A vaporized solvent chamber is not sustainable due to low latent heat of the solvents. Alternating steam and solvent injection provides heat for the solvent cycles and increases oil recovery. Co-injection of small volumes (5-15% by volume) of suitable solvents at the early times of the SAGD operation considerably improves the economics of the SAGD process

Ecological sustainability in rangelands : the contribution of dung beetles in secondary seed dispersal (case study: Chaharmahal and Bakhtiari province, Iran)

Ecological sustainability has been recognized as one of the main aspects of sustainable development of rangelands, at which different kinds of animal including insects, make substantial contributions. Dung beetles, known as dung-visiting insects, play several key roles in many ecological functions from which benefit both terrestrial ecosystems and human population. Specifically, they benefit rangelands through reducing greenhouse gas emission, nutrient cycling, plant growth enhancement, trophic regulation and pollination and secondary seed dispersal. This study examined secondary seed dispersal as one of the ecological functions of dung beetles, in Chaharmahal and Bakhtiari province, Iran. We applied an experimental approach to measure ecological function (i.e. seed removal) by functional groups of dung beetles. We tested whether functional dung beetle groups influence secondary seed dispersal differently. Through repeated standardized samples of sheep dung, data obtained regularly during two different months August and November in 2013. The results show that dung beetles play a role in secondary seed dispersal. However, it is affected by seed size, so that seed removal increased in the order of, large, medium and small size, respectively. The significant differences between treatments were found for small seeds in the both months. More seeds were dispersed from treatment t02 (all combinations of functional groups except large rollers) in August, while in November more seeds from treatments t01 (dwellers plus large and small tunnelers plus large and small rollers) and t03 (the combinations of dwellers plus small tunnelers, and small rollers) were removed. As a conclusion, it is suggested that if it is to guarantee the ecological sustainability of rangelands, paying attention to the ecological functions of dung beetles is crucial

PENGARUH IMPLEMENTASI PROGRAM PRAKERIN TERHADAP MUTU LULUSAN SMK

The phenomenon of the low quality of SMK graduates is the background of this research. The low quality of graduates is indicated by the fact that there are still aspects of graduate competency standards that have not been fulfilled. The causes include the inadequate implementation of the internship program. The purpose of this study is to determine: a) Implementation of Internship Program; b) Quality of SMK graduates; c) The magnitude of the influence of the implementation of the Prakerin program on the quality of SMK graduates. This study uses a quantitative approach with a survey method to examine a generalized sample. The data collection tool used a questionnaire, the data obtained were analyzed statistically. The design of the analysis is descriptive and subjective. The results showed that descriptively the implementation of the internship program was good, but there were still weaknesses in terms of provide feedback; The quality of graduates is also good, but there are still weaknesses in terms of application of values in life.. Perivikatively, the implementation of the apprenticeship program has a positive and significant effect on the quality of vocational graduates with a magnitude of influence of 40,70%, the remaining 59,30% is influenced by other factors. In conclusion, the implementation of the apprenticeship program has an effect on the quality of SMK graduates

Energy Relaxation Rates in AlInN/AlN/GaN Heterostructures

Cataloged from PDF version of article.The two-dimensional (2D) electron energy relaxation in Al0.83In0.17N/AlN/GaN heterostructures has been investigated experimentally. Shubnikov-de Haas (SdH) effect measurements were employed in the investigations. The electron temperature (T (e)) of hot electrons was obtained from the lattice temperature (T (L)) and the applied electric field dependencies of the amplitude of SdH oscillations. The experimental results for the electron temperature dependence of power loss are also compared with current theoretical models for power loss in 2D semiconductors. The power loss from the electrons was found to be proportional to (T (e) (3) - T (L) (3) ) for electron temperatures in the range 1.8 K < T (e) < 14 K, indicating that the energy relaxation of electrons is due to acoustic phonon emission via unscreened piezoelectric interaction. The effective mass and quantum lifetime of the 2D electrons have been determined from the temperature and magnetic field dependencies of the amplitude of SdH oscillations, respectively. The values obtained for quantum lifetime suggest that remote ionized impurity scattering is the dominant scattering mechanism in Al0.83In0.17N/AlN/GaN heterostructures

ANALISIS PENGARUH KEPEMIMPINAN KEPALA SEKOLAH, DISIPLIN KERJA, DAN IKLIM ORGANISASI TERHADAP KINERJA GURU SERTA IMPLIKASINYA TERHADAP MUTU LULUSAN SMK DAN KEMITRAAN DENGAN DUNIA KERJA SEBAGAI VARIABEL MODERATING ( Survey pada SMK Swasta di Wilayah Ciayumajakuning )

Penelitian ini dilaksanakan atas dasar adanya fenomena yang ada dimana kinerja guru belum optimal sehingga mutu lulusan SMK swasta di wilayah Ciayumajakuning pada saat ini masih rendah. Penelitian ini bertujuan untuk mengetahui dan mengkaji pengaruh kepemimpinan kepala sekolah, disiplin kerja dan iklim organisasi terhadap kinerja guru serta implikasinya terhadap mutu lulusan SMK dan kemitraan dengan dunia kerja pada SMK swasta di wilayah Ciayumajakuning. Metode penelitian yang digunakan adalah metode deskriptif dan verifikatif. Teknik sampling yang digunakan ialah proportionate stratified sampling dengan sampel sebanyak 380 responden. Metode analisis dalam penelitian ini menggunakan analisis jalur. Hasil penelitian menyimpulkan bahwa terdapat pengaruh secara positif dan signifikan faktor kepemimpinan kepala sekolah, disiplin kerja dan iklim organisasi secara parsial dan simultan terhadap kinerja guru. Secara parsial iklim organisasi memiliki pengaruh paling dominan dibanding yang lainnya. dan terdapat pengaruh positif dan signifikan kinerja guru terhadap mutu lulusan SMK, serta kemitraan SMK dengan dunia kerja memperkuat pengaruh kinerja guru terhadap mutu lulusan. Kata Kunci : Kepemimpinan Kepala Sekolah, Disiplin Kerja, Iklim Organisasi, Kinerja Guru, Kemitraan dengan Dunia Kerja, Mutu Lulusan SM

Vortex pairing in jets as a global Floquet instability: modal and transient dynamics

International audienceThe spontaneous pairing of rolled-up vortices in a laminar jet is investigated as a global secondary instability of a time-periodic spatially developing vortex street. The growth of subharmonic perturbations, associated with vortex pairing, is analysed both in terms of modal Floquet instability and in terms of transient growth dynamics. The article has the double objective to outline a toolset for global analysis of time-periodic flows, and to leverage such an analysis for a fresh view on the vortex pairing phenomenon. Axisymmetric direct numerical simulations (DNS) of jets with single-frequency inflow forcing are performed, in order to identify combinations of the Reynolds and Strouhal numbers for which vortex pairing is naturally observed. The same DNS calculations are then repeated with an added time-delay control term, which artificially suppresses pairing, so as to obtain time-periodic unpaired base flows for linear stability analysis. It is demonstrated that the natural occurrence of vortex pairing in nonlinear DNS coincides with a linear subharmonic Floquet instability of the underlying unpaired vortex street. However, DNS results suggest that the onset of pairing involves much stronger temporal growth of subharmonic perturbations than what is predicted by modal Floquet analysis, as well as a spatial distribution of these fast-growing perturbation structures that is inconsistent with the unstable Floquet mode. Singular value decomposition of the phase-shift operator (the operator that maps a given perturbation field to its state one flow period later) is performed for an analysis of optimal transient growth in the vortex street. Non-modal mechanisms near the jet inlet are thus found to provide a fast route towards the limit-cycle regime of established vortex pairing, in good agreement with DNS observations. It is concluded that modal Floquet analysis accurately predicts the parameter regime where sustained vortex pairing occurs, but that the bifurcation scenario under typical conditions is dominated by transient growth phenomena

Determination of the LO phonon energy by using electronic and optical methods in AIGaN/GaN

Cataloged from PDF version of article.The longitudinal optical (LO) phonon energy in AlGaN/GaN heterostructures is determined from temperature-dependent Hall effect measurements and also from Infrared (IR) spectroscopy and Raman spectroscopy. The Hall effect measurements on AlGaN/GaN heterostructures grown by MOCVD have been carried out as a function of temperature in the range 1.8-275 K at a fixed magnetic field. The IR and Raman spectroscopy measurements have been carried out at room temperature. The experimental data for the temperature dependence of the Hall mobility were compared with the calculated electron mobility. In the calculations of electron mobility, polar optical phonon scattering, ionized impurity scattering, background impurity scattering, interface roughness, piezoelectric scattering, acoustic phonon scattering and dislocation scattering were taken into account at all temperatures. The result is that at low temperatures interface roughness scattering is the dominant scattering mechanism and at high temperatures polar optical phonon scattering is dominant

Evaluation and Ranking of Book Social Network Websites

Book social media are reading communities primarily developed as online social networks. This study aims to find precise criteria and indicators for evaluation of book social network and examine and rank the most popular book social networks. The sample population included 10 English and two Persian book/reading social networks publicly available on the Web. A checklist containing 9 main criteria and 35 indicators was built up through a Delphi study and it was used to gather the characteristics of the sample networks. The results indicate that Shelfari has the highest number of features (87%) and therefore it ranks first. In contrast, Bisheh, a Persian social network, contains only 60% of the features and ranks last. The results reveal that there is no meaningful statistical difference among the scores. In other words, all of the twelve book/reading social networks contain almost similar features and have more than 50% of indicators. Several technical indicators were ignored as it was impossible to access and examine inner layers of the studied websites.  In general, Persian book social network scored less than English ones and this can be related to smaller number of audience, little interest in such online communities or language barriers in developing book social networks. These findings can lead to new patterns and recommendations for different societies to improve their book social networks as these websites can encourage reading. Unlike general social networks, little work has been done on book/reading social network in order to reflect their structural functional characteristics. Besides, this paper has resulted in specific criteria and indicators for evaluation of book social networks which can be used as a tool for future studies