Motivational Strategies Used by an Englsh Teacher at Hand Fortuna Center

This is a qualitative study on the use of motivational strategies by the English teacher at Hand Fortuna Center. This study was based on Dörnyei\u27s (2001) theory about motivational strategies and focused on the interaction between the teacher and his students in the classroom. The data were collected by using video recording and interview. The observation was done in three meetings within two weeks. The duration of the class was 90 minutes for each meeting. The findings showed that the teacher used five out of eight motivational strategies in the classroom. There were making learning stimulating and enjoyable, protecting the learners\u27 self-esteem and increase their self-confidence, presenting task in a motivating way, allowing learners to maintain a positive social image, and promoting cooperation among the learners. For the interview, the writer found that the reason why the teacher used the motivational strategies. It was because the strategies could increase students\u27 motivation in learning language

Evaluasi Hasil Modifikasi Generator Hmxt-200 Pada Subsistem Elektrolit, Feedwater, Dan Kontrol Gas Di PT. Indonesia Power Tambak Lorok, Semarang

Generator HMXT-200 merupakan mesin pembangkit gas hidrogen pada PT. Indonesia Power Tambak Lorok Semarang. Mesin ini menggunakan air (H2O) dengan campuran katalis potassium hydroxide (KOH) untuk menghasilkan hidrogen dengan tekanan 147PSIG. Nantinya gas tersebut akan digunakan sebagai pendingin generator listrik.Antara bulan Mei-Agustus 2008 Generator HMXT-200 mengalami masalah yang menyebabkan mesin tersebut shut down. Dari keseluruhan penyebab shut down alarm, mayoritas yang terjadi adalah Low KOH Level, yaitu kurangnya supply feedwater pada produksi maksimal, mencapai 6% dan Differential Pressure Alarm, yaitu pertidaksamaan pressure oksigen dan hidrogen pada sistem, mencapai 10% kemungkinan. Perbaikan yang dilakukan untuk Low KOH Level dengan menambah relocation tank and regulator, guna menurunkan kapasitas produksi dari 147PSIG menjadi 100PSIG, sehingga supply feedwater tercukupi. Sedangkan pada Differential Pressure Alarm adalah dengan mengubah posisi hydorgen vent, sehingga memperlancar pembuangan hidrogen untuk mengurangi pressurenya.Data yang diambil ulang pada bulan Oktober-Nopember 2008 menunjukkan modifikasi yang telah dilakukan mencapai 50% keberhasilan, dengan menurunkan Low KOH Level menjadi 3% dan Differential Pressure Alarm menjadi 5% kemungkinan terjadi. Peninjauan ulang pada hasil modifikasi dengan memperhatikan penyebab lain kedua alarm, akan memaksimalkan kinerja sistem

Pengaruh Jenis Perekat Terhadap Keruntuhan Lentur Balok Laminasi Galar Dan Bilah Vertikal Bambu Petung

Bonding technology in the term of lamination technique is the technique of merging small material with limited size into material that have bigger, longer, wider and thicker dimension. Synthetics commercial glues which commonly being used in Indonesia for wood bonding processes are urea formaldehyde and melamine formaldehyde. The natural weaknesses of laminated bamboo beam are bending and shear failures. The objectives of this research are to observe the influence glue type and the element of laminated beam of bamboo petung in bending and shear rupture. Preliminary test has been conducted to know more about the physical and mechanical behavior with ISO 3129-1975 standard. Two kinds of tests, bending and shear tests, have been carried out on both stripped and flatted laminated bamboos. Flatted beam was arranged with 13 layers of flatted bamboos, while stripped beam was made by almost 65 stripped bamboos that were arranged into 5 lamination layers. Cold pressure processes of urea and melamine were used on these vertical layers of laminated beam. Hydraulics jack was used to make 2.5 MPa pressure. Four points statically load system was applied on both bending and shear tests. From the preliminary tests on bamboos from Magelang have been noted that the moisture content and the density were 12.48% and 0.98 g/cm3, respectively. The mechanical behavior indicated the compression parallel and perpendicular, tensile, modulus of rupture, modulus of elasticity, shear strength were 62.53 MPa, 14.54 MPa, 203.374 MPa, I62.34 MPa, 13589 MPa and 9.18 MPa, respectively. Nevertheless, from the preliminary tests on bamboos .from Wates indicated that the moisture content and the density were 23.75% and 0.702 g/cm3 while the mechanical behavior were 44.468 MPa, 13.407 MPa, 157.065 MPa, 117.39 MPa, 18209 MPa and 10.20 MPa, respectively on similar parameters above. From the values of moment, stiffness and Modulus of Rupture (MOR) parameters in bending and shear tests, it can concluded that the strength stripped laminated beam was higher than that of flatted laminated

Optimization of Reaction Conditions in the Production of Gadolinium Diethylenetriamine Pentaacetate-Folate

A previous study has performed the laboratory-scale synthesis and characterization of Gadolinium Diethylenetriaminepentaacetate-Folate. Some parameters associated with the synthesis have been defined. In current study was focused on establishment the parameters for scaling up the production of Gadolinium Diethylenetriaminepentaacetate-Folate as a targeted MRI contrast agent. For the purpose of subsequent scaling up the synthesis, the parameters particularly those determining the yield of the reaction product should be established. This report presents the use of The Placket Burman Design and the Response Surface Methodology in establishing the parameters. Thus, following the Placket Burman Design, a number of synthesis reactions were carried out, each with different reaction conditions, with respect to parameters to include: mole ratio of reactants (i.e mole of Gd3+ to DTPA-Folate), time of reaction, temperature, stirring rate, pH and solvent volume. Using this method, a conclusion could be drawn that the three factors were found to be significant. To get final conclusions on the optimal synthesis reaction conditions, the Response Surface Methodology was then applied. For this purpose, again, some synthesis reactions experiments were performed. These were done, in accordance to the Response Surface Methodology, verified by analysis of countour plots, helped to locate the optimal value of the factors. The resulted data showed that for optimal yield of the synthesis reaction there were three dominant parameters. They were mole ratio of reactants, stirring rate process, and the volume of water

Dependence of persistent gaps at Landau level crossings on relative spin

We report measurements of the quantum Hall state energy gap at avoided crossings between Landau levels originating from different conduction band valleys in AlAs quantum wells. These gaps exhibit an approximately linear dependence on magnetic field over a wide range of fields and filling factors. More remarkably, we observe an unexpected dependence of the gap size on the relative spin orientation of the crossing levels, with parallel-spin crossings exhibiting larger gaps than antiparallel-spin crossings.Comment: 4 pages, 3 figures, submitted for publicatio