49 research outputs found
Development of detectors and calibration methods for spectral irradiance and radiometric temperature measurements
Get PDFThe research work, described in this thesis, has been carried out at the Metrology Research Institute of Helsinki University of Technology between 2000 and 2005. The research focused on the development of new detectors, calibration methods and their applications in optical radiometry.
A new photodetector, which is based on three GaAsP Schottky-barrier photodiodes, has been introduced. The spectral properties of the GaAsP trap detector have been studied in the wavelength range between 200 nm and 600 nm. Spectral reflectance of a single windowless GaAsP photodiode, measured with high-accuracy gonioreflectometer, has been presented. Based on these measurements, the internal quantum efficiencies for both the single photodiode and the trap detector have been calculated.
A novel scanning method for characterization of filter radiometers, which uses a wavelength tuneable Ti:Sapphire laser source, has been described. High accuracy calibration of filter radiometers at 900 nm has been conducted. The results have been compared to the spectral irradiance responsivities measured with the more conventional monochromator-based method.
Both the laser-based method and the monochromator-based method have been used for characterization of the detectors for radiometric measurements of the thermodynamic temperatures of several blackbodies in irradiance mode. Four filter radiometers with central wavelengths between 600 nm and 900 nm have been used. The measured temperatures include the freezing temperature of silver and copper, which are defined by the International Temperature Scale of 1990.reviewe
The taxonomic significance of leaf micromorphology in the genus melastoma l. (melastomataceae)
No full textA comparative leaf micromorphological study of Melastoma malabathricum, M. malabathricum var. alba and M.
sanguineum (Melastomataceae) was carried out by scanning electron microscope. Characters such as epidermal cell
shape, trichomes and stomatal type and distribution were observed. Non-glandular trichomes are present in all species
examined. The stomata are all of paracytic type and dispersed randomly over the whole abaxial surface. The patterns of
surface sculpturing and outer stomatal rim are unique in all the species examined. Leaf micromorphology has significant
taxonomic value in the genus Melastoma and the present study has added some new taxonomic information for the genus
Melastoma
PENGARUH PENERAPAN MODEL COOPERATIVE LEARNING TIPE STAD TERHADAP HASIL BELAJAR SISWA KELAS V PADA MATA PELAJARAN IPS POKOK BAHASAN PROKLAMASI KEMERDEKAAN REPUBLIK INDONESIA DI SDN RAMBIGUNDAM 01 JEMBER
No full textTujuan penelitian ini adalah untuk mengetahui ada tidaknya pengaruh penerapan model cooperative learning tipe STAD terhadap hasil belajar siswa kelas V pada mata pelajaran IPS Pokok Bahasan Proklamasi Kemerdekaan Republik Indonesia di SDN Rambigundam 01 Jember Semester Genap Tahun Pelajaran 2015/2016.
Penelitian ini dilakukan di SDN Rambigundam 01 Jember terhitung pada tanggal 14 Desember 2015. Jenis penelitian ini adalah penelitian true experimental atau eksperimental sebenarnya dengan pola pre-test post-test control group design. Populasi pada penelitian ini adalah seluruh siswa kelas VA dan VB SDN Rambigundam 01 Jember. Penentuan kelas mana yang akan dijadikan kelas kontrol dan kelas eksperimen, terlebih dahulu peneliti melakuka omogenitas terhadap populasi k menentukan tingkat kemampuan a. Hasil perhitunga as menunjuk harga selanjutnya harga b. harga 40 pada taraf signifikansi 5%. Nilai memiliki harga 2, 011. Hasil tersebut membuktikan bahwa < 2,011 yang berarti kemampuan awal siswa sebelum diberi perlakuan adalah homogen. Tindak lanjutnya dilakukan undian untuk menentukan kelas eksperimen dan kelas kontrol, didapatkan kelas VB sebagai kelas eksperimen dan kelas VA sebagai kelas kontrol.
Teknik pengumpulan data yang digunakan dalam penelitian ini adalah dokumen, observasi, wawancara tes. Skor tes siswa berupa nilai hasil pre-test dan po yang dianalisis dan rumus uji-t. Hasil perhit dengan harga ini kemudian dibanding dengan fikansi 5% sehingga diperoleh = 2,0. Diperoleh 2,0168), dengan demikian hipotesis nihil (yang berbunyi tidak ada pengaruh penerapan model cooperative learning tipe STAD terhadap hasil belajar siswa kelas V pada mata pelajaran IPS Pokok Bahasan Proklamasi Kemerdekaan Republik Indonesia di SDN Rambigundam 01 Jember ditolak dan hipotesis alternatif (Ha) yang berbunyi ada pengaruh penerapan model cooperative learning tipe STAD terhadap hasil belajar siswa kelas V pada mata pelajaran IPS Pokok Bahasan Proklamasi Kemerdekaan Republik Indonesia di SDN Rambigundam 01 Jember diterima.
Berdasarkan hasil analisis tersebut, maka dapat disimpulkan bahwa ada pengaruh penerapan model cooperative learning tipe STAD terhadap hasil belajar siswa kelas V pada mata pelajaran IPS Pokok Bahasan Proklamasi Kemerdekaan Republik Indonesia di SDN Rambigundam 01 Jember. Model cooperative learning tipe STAD ini diharapkan dapat digunakan oleh guru sebagai salah satu cara dalam hal penyampaian materi khususnya pada proses pembelajaran di sekolah mata pelajaran IPS
The effectiveness of teaching simple past tense by using the medium of English songs (an experimental study at the XI grade of MAN 2 Pekalongan in the academic year of 2010/2011)
Get PDFThe background of this research is based on the phenomenon that learning grammar is seen as one of the language item that is difficult to learn because of its intricacy.
This research is aimed to find the answer to the following research questions.
1. How effective is English songs as medium to teach simple past?
2. How are the students’ simple past achievements in experimental and control groups before and after the treatment?
The study was to find out whether or not English song medium is more effective to improve the students’ understanding on English simple past than non English song.
This study employed the true experimental design where senior high school MAN 2 Pekalongan was selected as the research setting. Of the ten sections of grade XI, two classes were selected randomly by the process of simple random sampling. One class was assigned as the experimental group, in this case was class XI.A2 and the other that was class XI.A4 as the control group. The methods of data elicitation used here were test and observation. The data were obtained by employing the relevant pre test and post test, and observation.
In this study the obtained data were analyzed. The test of significance of the difference between two groups was measured by two ways ANOVAs. The research result shown that the significance was seen at 0.05 level of significance as the criterion for the rejection of null hypothesis. By the 3 and 134 degrees of freedom, the critical value for the 0.05 level of significance of F table was 2.68. Meanwhile the result of pretest experimental class (57.50) higher than the pretest of control class. The result of posttest experimental (85.83) higher than the pretest of experimental class. The pretest of control class (56.06) lower than posttest control (78.48). Score posttest of experimental class (85.83) higher than score posttest of control class. It concluded that the use of English songs as teaching medium is effective way to teach simple past. It showed from the students’ achievement of experimental class higher than students’ achievement of control class. The observation was administered to know the students’ understanding during the experiment. Then, the result of the observation was interpreted.
The main finding of the study were; the experimental and control group were equivalent at the beginning of the experiment and the teaching and learning of English grammar through English song media played positive role in improving the students’ academic understanding
Using Realia to Teach Physically Disabled Students in Writing Descriptive Texts
No full textThis case study is focused on teaching descriptive texts by using realia. The writer took the 8th grade students of SMPLB Negeri Ungaran as the subjects of the study. The aim of this research is to know the implementation of teaching descriptive texts that cover parts, qualities, and characteristics of the objects. This study was carried out around four meetings. In each meeting, the researcher observed the situation of the class and the setudents’ activities in that classroom. The data collection method used in the research was observation, interview, and documentation. In implementating the research, the researcher found several problems and difficulties in teaching learning processes. One of them is that, the teaching physically disabled students are not easy. It has to be slowly because the students’ ability in writing the lesson is limited. The other problem comes from the teacher him/herself that never uses media or tools to teach physically disabled students. It is a matter of fact that teaching physically disabled students needs media to make them easily understand the learning materials. One of the media that could be used is realia. From this research it is expected that the problems could be solved and a new paradigm in teaching descriptive texts for disabled students could be considered.Keywords : Descriptive Texts; Physically Disabled Students; Reali
Pengaruh Dapar Fosfat terhadap Stabilitas Astemizol: Effect of phosphate buffer on astemizol stability
Get PDFAsternizoI, suatu antihistamin non sedatif, digunakan dalam penelitian ini untuk diketahui data stabilitasnya oleh pengaruh dapar fosfat.
Uji stabilitas astemizol oleh pengaruh suhu dan pH dilakukan dalam dapar fosfat 0,02 M dengan pH 8,0, 9,0, 10,0, dan 11,0 pada suhu 50°, 60°, dan 70°C. Pengaruh dapar fosfat terhadap stabilitas astemizol dilakukan dalam berbagai kadar fosfat dalam dapar dengan pH 11,0 pada saw 70°C. Kekuatan ion* (cc) larutan pada uji stabilitas dibuat sama sebesar 0,30.
Hasil penelitian menunjukkan bahwa reaksi degradasi astemizol berjalan mengikuti kinetika reaksi orde pertama. Penggunaan dapar fosfat mempercepat degradasi asternizol. Daya katalisis PO4-- > 1-11304= > H2PO4-. Pada rentang pH 8,0 sampai dengan 11,0 reaksi degradasi tidal( dikatalisis oleh basa spesifik.
Kata kunci: astemizol, stabilitas, dapar, fosfat
Using Realia to Teach Physically Disabled Students in Writing Descriptive Texts
No full textThis case study is focused on teaching descriptive texts by using realia. The writer took the 8th grade students of SMPLB Negeri Ungaran as the subjects of the study. The aim of this research is to know the implementation of teaching descriptive texts that cover parts, qualities, and characteristics of the objects. This study was carried out around four meetings. In each meeting, the researcher observed the situation of the class and the setudents’ activities in that classroom. The data collection method used in the research was observation, interview, and documentation. In implementating the research, the researcher found several problems and difficulties in teaching learning processes. One of them is that, the teaching physically disabled students are not easy. It has to be slowly because the students’ ability in writing the lesson is limited. The other problem comes from the teacher him/herself that never uses media or tools to teach physically disabled students. It is a matter of fact that teaching physically disabled students needs media to make them easily understand the learning materials. One of the media that could be used is realia. From this research it is expected that the problems could be solved and a new paradigm in teaching descriptive texts for disabled students could be considered
THE GENUS MIMOSA WITH SPECIAL REFERENCE TOM. QUADRIVALVIS L. VAR. LEPTOCARPA (D.C.) EARNEDY, A NEW SPECIES RECORD FOR THE WEED FLORA IN MALAYSIA*)
Get PDFAn exploratory floristic survey of the genus Mimosa was conducted in 1993 to ascertain species diversity and their spatial patterns of distribution in Peninsular Malaysia. A new species record of uncertain indigene, M.. quadrivalvis was recorded for the first time in restricted localities along the roadsides in Pekan Darat and Bertam, Seberang Perai, Gurun and Bedong in Kedah in addition to widely distributed and seemingly ubiquitous presence of M. invisa Mart. ex. Colla and M. pudica L. The latter two species were mostly found in open, disturbed and derelict habitats, agricultural areas and ex-mining lands. Both species exhibited largely contagious and overdispersed distribution patterns with positive peaks in pattern intensity values although regularity or underdispersed distribution patterns do manifest in certain localities. The giant mimosa, M. pigra inhabited in clustered thickets, large pockets of lands in the urban and sub-urban localities in the states of Penang, Perak, Kelantan, Kuala Lumpur and Negeri Sembilan. In other states, M. pigra was confined to a few localities in smaller patches. Except for M. quadrivalvis, the other species of Mimosa are serious weeds in the agricultural, recreational and residential and derelict areas. A key to the Mimosa species is constructed along with brief descriptions on their morphology and ecology.
Key words: Malaysia/Weed ecology/Mimosa invisa/Mimosa pigra/Mimosa pudica/Mimosa quadrivalvis/ Weeddistribution/Weed anatomy and morphology
Pengaruh Model Cooperative Learning Tipe STAD Terhadap Hasil Belajar Siswa Kelas V Pada Mata Pelajaran IPS Pokok Bahasan Proklamasi Kemerdekaan Republik Indonesia di SDN Rambigundam 01 Jember
No full textTujuan umum dalam penelitian ini adalah untuk mengetahui ada tidaknya pengaruh atau dampak dari suatu perlakuan (treatment) tertentu terhadap perubahan suatu kondisi atau keadaan tertentu. Penerapan model pembelajaran yang diterapkan oleh guru khususnya di SD dalam mata pelajaran IPS masih kurang bervariasi dan memiliki kecenderungan pada metode tertentu sehingga menyebabkan rendahnya minat siswa serta kurang adanya keterlibatan siswa dalam proses pembelajaran. Penelitian ini dilaksanakan di SDN Rambigundam 01 Kabupaten Jember. Jenis penelitian ini adalah penelitian eksperimen dengan sampel penelitian terdiri atas 50 siswa. Teknik pengumpulan data dalam penelitian ini menggunakan metode dokumen, wawancara, observasi dan tes. Pelaksanaan penelitian dengan menerapkan model cooperative learning tipe STAD dilaksanakan selama 2 minggu, sejak tanggal 9 sampai 25 April 2016. Sebelum melakukan penelitian terlebih dahulu dilakukan uji homogenitas dan uji normalitas. Uji homogenitas bertujuan untuk mengetahui kondisi suatu kelas homogen atau tidak homogen. Uji normalitas bertujuan untuk mengetahui penyebaran data pada sampel penelitian. Hasil penelitian menunjukkan harga= 2,785, kemudian harga dikonsultasikan dengan pada taraf signiikansi 5%, ni
THE GENUS MIMOSA WITH SPECIAL REFERENCE TOM. QUADRIVALVIS L. VAR. LEPTOCARPA (D.C.) EARNEDY, A NEW SPECIES RECORD FOR THE WEED FLORA IN MALAYSIA
No full textAn exploratory floristic survey of the genus Mimosa was conducted in 1993 to ascertain species diversity and their spatial patterns of distribution in Peninsular Malaysia. A new species record of uncertain indigene, M.. quadrivalvis was recorded for the first time in restricted localities along the roadsides in Pekan Darat and Bertam, Seberang Perai, Gurun and Bedong in Kedah in addition to widely distributed and seemingly ubiquitous presence of M. invisa Mart. ex. Colla and M. pudica L. The latter two species were mostly found in open, disturbed and derelict habitats, agricultural areas and ex-mining lands. Both species exhibited largely contagious and overdispersed distribution patterns with positive peaks in pattern intensity values although regularity or underdispersed distribution patterns do manifest in certain localities. The giant mimosa, M. pigra inhabited in clustered thickets, large pockets of lands in the urban and sub-urban localities in the states of Penang, Perak, Kelantan, Kuala Lumpur and Negeri Sembilan. In other states, M. pigra was confined to a few localities in smaller patches. Except for M. quadrivalvis, the other species of Mimosa are serious weeds in the agricultural, recreational and residential and derelict areas. A key to the Mimosa species is constructed along with brief descriptions on their morphology and ecology
