Pressure-induced isostructural phase transition of metal-doped silicon clathrates

We propose an atomistic model for the pressure-induced isostructural phase transition of metal-doped silicon clathrates, Ba8Si46 and K8Si46, that has been observed at 14 GPa and 23 GPa, respectively. The model explains successfully the equation of state, transition pressure, change of Raman spectra and dependence on the doped cations as well as the effects of substituting Si(6c) atoms with noble metals.Comment: 5 pages, two coumn, 5 figures. See http://www.iitaka.org/down.html for more informatio

Pengembangan Instrumen Tes Kalkulus Lanjut 2 Berbasis Pemecahan Masalah

This research tried to improve the test instrument at advanced calculus 2. The objectives of this research was to test instrument the valid and good based on problem solving. This research uses 4-D development model of Thiagarajan (1974) which consists of four stages: define, design, develop, and disseminate. This research only ended up at the stage of develop. Test validity processed by test proporsion, whereas testing of result analyzable by validity, and reliability. Product of the research show (1) the test instrument developed was proved to be valid by the validator with the following averaged scores 3,05 and 3,18 from the maximal averaged score 4, (2) the analysis of experiment producted test instrument which validity and reliability. Based on the overall findings from this research we can conclude that the test instrument were proved to be valid, and good. Key words : test instrument, problem solving, 4-

Toritatejoshi Dake, Bakari, Dan Nomi Dalam Kalimat Bahasa Jepang

In writing this thesis, the writer discussed „Toritatejoshi dake, bakari, andnomi in Japanese sentences‟. The writer chose the title due to the lack of explanation of those words in Japanese books, therefore there were still many mistakes in using dake, bakari, and nomi. The first step in writing this thesis was collecting the data by the writer, analyzed the data, and presented the data descriptively.Dake, bakari, and nomi in bahasa Indonesia mean hanya and it indicates limitation. Although in Indonesian those three words can be interpreted with a same word, there are actually differences in meaning and USAge of those words.Dake is a toritatejoshi which is limiting the element in a sentence that is the only element that exist and omitting another similar element. Dake can be used in many situations, such as formal and non-formal situation or in written language and verbal language. Bakari is a toritatejoshi that indicates a limitation, but with two distinctive limitating methods. First, bakari has the same meaning with dake and emphasized the element in a sentence which is the only element that exist by omitting another similar element. Bakari which has the same meaning with dake, usually can be found in a sentence containing ~ru verb or in a sentence with no verb on it. Second, bakari is limitating and emphasizing the element that indicates a repeated activity. Usually there is a ~teiru verb or activity verb. Nomi is a toritatejoshi which has the same meaning with dake. According to Professor Honda, nomi is not only used in a formal situation and in a written language, but also can be used in a verbal language, however it will gives a formal impression, this can be happened because the partner is considered as a person who has a higher degree

Pemanfaatan Ampas Bioetanol dari Kulit Pisang (Musa Sapientum) sebagai Briket

With the energy crisis in Indonesia in recent years is due to the human need for fuel is increasing, while the supply of oil or natural gas is limited. This causes the cost of fuel energy. In addition to fuel oil and natural gas, timber when done randomly and in large quantities will interfere with the balance of the ecosystem or environmental sustainability. The purpose of this study was to obtain fuel briquettes from waste banana peel pulp bioethanol, as a substitute for fossil fuels. The study was conducted with a variable fixed briquette diameter 1 cm, height 5 cm and a total weight of 22 grams per briquet. While variable is the% change in the composition of the adhesive (25% and 50%) and the type of material that is Ampas bioethanol kepok banana peel and King. Response observed that color, calorific value, long burning fire and the resulting color. The results showed that% moisture content greatly affects the calorific value, long burning time. The calorific value of the greatest and most long ignition time obtained on treatment plantain because it produces a lower water content compared to banana pulp kepok. From the analysis that has been done can be concluded that the briquettes are in accordance with SNI

Perbedaan Hojodoushi ～ている Dan ～てある Dalam Kalimat Bahasa Jepang

My research problems are : 1. How are the structure and meaning of auxiliaryverb „–teiru‟ and „–tearu‟? 2. How are the similarities and differences betweenauxiliary verb „–teiru‟ and „–tearu‟?.The purpose of this research are : 1. To describe the structure and meaning ofauxiliary verb “–teiru” and “–tearu”. 2. To describe the the similarities anddifferences between auxiliary verb “–teiru” and “–tearu”. The research methodused is Agih method. In analyzing the data, this research used descriptive analysistechnique.The result of this research show that the auxiliary verb “-teiru‟ and “-tearu” areto express the meaning of condition and both are express resultatif aspect. Thedifference are : 1. auxiliary verb –teiru express the result of certain action. Thespeaker merely wants to describe the appearance of situation and auxiliary verb–teiru can used intransitive verb and transitive verb . 2. auxiliary verb –tearudescribes an action that is done with a certain objective in mind and auxiliaryverb –tearu only used transitive verb

KEMAMPUAN BERPIKIR KRITIS SISWA BERBASIS MODEL MISSOURI MATHEMATICS PROJECT MENGGUNAKAN STRATEGI THINK TALK WRITE

This research aims to describe the critical thinking skills of students using the Missouri Mathematics Project learning model combined with Think Talk Write strategies on cube and block material. This research was conducted at Xaverius  Junior High School Lubuklinggau grade VIII of the 2016/2017 academic year in the even semester. Before carrying out the research, the test questions were first tested to see validity, reliability, differentiation and the level of difficulty of the questions. Of the 5 questions tested, all the questions are valid with a moderate reliable level. The learning process uses the Missouri Mathematics Project learning model combined with the Think Talk Write strategy. The data collection technique uses a test of 5 questions which refers to the indicators of students' critical thinking abilities. Based on the results of the study, the results of students' critical thinking skills in the cube and block material grade VIII of Xaverius Junior High School Lubuklinggau in the academic year 2016/2017 with an average score of 89.53 included in the excellent category. The percentage of each indicator can be seen that: the indicator interprets as much as 69.44%, the analyzing indicator gets a percentage of 92.59% in the very good category. The evaluation indicator shows that the percentage of 99.07% is in the very good category. In the last indicator, which is input, the percentage of 96.53% is in the excellent category.Penelitian ini bertujuan untuk mendeskripsikan kemampuan berpikir kritis siswa menggunakan model pembelajaran Missouri Mathematics Project yang dikombinasikan dengan strategi Think Talk Write pada materi kubus dan balok. Penelitian ini dilaksanakan di SMP Xaverius Lubuklinggau di kelas VIII tahun pelajaran 2016/2017 pada semester genap. Sebelum melaksanakan penelitian, soal tes terlebih dahulu diujicobakan untuk melihat kevalidan, reliabel, daya pembeda dan tingkat kesukaran soal. Dari 5 soal yang diujicobakan maka semua soal valid dengan tingkat reliabel sedang. Proses pembelajaran menggunakan model pembelajaran Missouri Mathematics Project yang dikombinasikan dengan strategi Think Talk Write. Teknik pengumpulan data menggunakan tes sebanyak 5 soal yang mengacu pada indikator kemampuan berpikir kritis siswa. Berdasarkan hasil penelitian  diperoleh hasil kemampuan berpikir kritis siswa pada materi kubus dan balok di kelas VIII SMP Xaverius Lubuklinggau tahun ajaran 2016/2017 dengan nilai rata-rata hasil tes siswa sebesar 89,53 termasuk dalam kategori sangat baik. Persentase tiap indikator dapat dilihat bahwa : indikator menginterpretasi sebesar 69,44% , indikator menganalisis di peroleh presentase 92,59% berada pada kategori sangat baik. Pada indikator mengevaluasi diperoleh presentase 99,07% berada pada kategori sangat baik. Pada indikator terakhir yaitu menginferensi diperoleh presentase 96,53% berada pada kategori sangat baik

OPTIMALISASI KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA MELALUI MODEL MEANS-ENDS ANALYSIS di KELAS VIII

This research aims to determine the mathematical problem solving abilities of eight grade students of  Junior High School Number 2 Lubuklinggau after attending learning using the Means-Ends Analysis learning model in the good category. The population in this research were all eighth grade students of Junior High School Number 2 Lubuklinggau in the 2017/2018 academic year with research samples VIII.5. The design used in this study was a pretest-posttest control group design. Data collection techniques use a test of 5 questions which refers to indicators of mathematical problem solving abilities. Based on data analysis using the normality test and hypothesis testing data, it was found that obtained = 7.91 at the level of confidence α = 0.05 and  = 1.671. So the results show that the problem solving abilities of eight grade students Junior High School Number 2 Lubuklinggau are in the good category with an average score of 7.24.Penelitian ini bertujuan untuk mengetahui kemampuan pemecahan masalah matematika siswa kelas VIII SMP N 2 Lubuklinggau setelah mengikuti pembelajaran menggunakan model pembelajaran Means-Ends Analysis berada pada kategori baik. Populasi pada penelitian ini adalah seluruh siswa kelas VIII SMP N 2 Lubuklinggau pada tahun ajaran 2017/2018 dengan sampel penelitian VIII.5. Desain yang digunakan dalam penelitian ini adalah pretest-postest control group desain. Teknik pengumpulan data menggunakan tes sebanyak 5 soal yang mengacu pada indikator kemampuan pemecahan masalah matematika. Berdasarkan analisis data menggunakan uji normalitas dan uji hipotesis data, didapatkan bahwa diperoleh  7,91 pada taraf kepercayaan α = 0,05 dan   sebesar 1,671. Maka hasilnya menunjukkan bahwa kemampuan pemecahan masalah siswa kelas VIII SMP N 2 Lubuklinggau berada pada kategori baik dengan skor rata-rata 7,24

The Potency of Hylocereus polyrhizus Peel Extract as Protector on Lead Acetate-Induced Testicular Toxicity in Mice

This study aimed to investigate the treatment of Hylocereus polyrhizus peel extract 250 mg, 500 mg, and 1000 mg/kg BW orally once in a day for 40 days to improve the thickness of seminiferous tubular epithelium, Leydig cells, and spermatogenic cells in mice which were exposed to lead acetate 30 mg/kg on the 5th day one hour after the the Hylocereus polyrhizus peel extract administration for 35 day. The Hylocereus polyrhizus peel extract administration significantly increased the thickness of seminiferous tubular ephitelium, number of leydig cells and spermatogenic cell in lead acetate-induced testicular toxicity. The Hylocereus polyrhizus peel extract could be used as the protector in lead acetate-induced testicular toxicity