Penerapan Model Pembelajaran Kooperatif Tipe Snowball Drillinguntuk Meningkatkan Prestasi Belajar Siswa pada Pokok Bahasan Sistem Periodik Unsur di Kelas X SMA Negeri 1 Inuman

This research aims to increase student achievementon the subject Sistem periodic unsure inclass XSMAN 1 Inuman. This research is a kind of experiment research with pretest-posttest design. The research was conducted in SMAN 1 Inuman.The samples of this research were the students of class X MIA 2 as the experimental class and students of class X MIA 1 as the control class.Experimental class is a class that is cooperative learning model Snowball Drilling, while the control class was not. Data analysis technique used is the t-test. Based on analysis of data obtained tarithmetic> ttable is 2,7761 > 1,66, means that the application of cooperative learning model Snowball Drilling can improve student achievement on the subject of system periodic unsurein class X SMAN 1 Inumanincrease learning achievement category in the experimental class is based on the normalized gain scores (N-Gain) relatively high at 0,7806

Ionosphere: A Month Campaign over Sipitang and Parit Raja Stations, Malaysia

Ionospheric scintillations, which cause significant effects on satellite signals for communication and navigation, often takes place in equatorial region such as Malaysia. However, this disturbance are not fully understand due to few studies performed. This research reports the study and monitoring activity on Total Electron Content (TEC) and ionospheric scintillation in Malaysia using GPS measurements. Approach: One dual-frequency GPS receiver was positioned at the main station in Parit Raja, West Malaysia (1.86° N, 103.8° E) and Sipitang, East Malaysia (5.10° N, 115.56° E) respectively. Dual-frequency GPS data collected during the one-month ionospheric experimental campaign was used for TEC and scintillation computation and analysis. The TEC with 15 sec interval were computed from combined L1 and L2 code-pseudorange and carrier phase measurements. Whereas, the scintillation parameter S4 index was computed as a standard deviation of the received signal power normalized to average signal power every 60 sec on L1. A corrected S4 (without noise effects) was also computed and used in the analysis. Results: It was found that the daily maxima vTEC for Parit Raja (PR) ranged from 38-100 TECU, which is generally higher than those of Sipitang, which ranged from 30-42 TECU. However, a general consistency for both stations can be seen during the 1 month campaign period. Conclusions/Recommendations: In conclusion, these results show good agreement in the existence of the equatorial anomaly observed during moderate solar flux conditions and undisturbed geomagnetic condition. This will contributes to the knowledge of equatorial ionosphere and help in space weather condition. However, to better understand and characterize the ionosphere over Malaysia, more campaigns should be encouraged

Application of a hybrid of least square support vector machine and artificial bee colony for building load forecasting

Accurate load forecasting is an important element for proper planning and management of electricity production. Although load forecasting has been an important area of research, methods for accurate load forecasting is still scarce in the literature. This paper presents a study on a hybrid load forecasting method that combines the Least Square Support Vector Machine (LSSVM) and Artificial Bee Colony (ABC) methods for building load forecasting. The performance of the LSSVM-ABC hybrid method was compared to the LSSVM method in building load forecasting problems and the results has shown that the hybrid method is able to substantially improve the load forecasting ability of the LSSVM method

Evaluasi Kesesuaian Perairan Untuk Budidaya Ikan Nila (Oreochromis Niloticus) Di Kawasan Pesisir Desakandang Besi Kecamatan Kota Agung Barat Kabupaten Tanggamus

Desa Kandang Besi merupakan salah satu desa yang potensial untuk budidaya perairan yang dilintasi oleh aliran Sungai Way Belu yang beradadi kawasan Pesisir Kecamatan Kota Agung Barat Kabupaten Tanggamus. Penelitian ini ditujukan untuk mengevaluasi tingkat kesesuaian perairan untuk budidaya ikan Nila (Oreochromis niloticus)serta infrastrukur yang mendukung. Penelitian ini menggunakan metode deskriptif kuantitatif dengan cara survey. Analisis kesesuaianperairan dilakukan dengan metode matching dan scoring. Teknik mengumpulan data melalui observasi dan pengisian angket oleh 15 pembudidaya yang dipilih dengan cara accidental sampling sedangkan penentuan lokasi ditentukan dengan purposiv. Hasil penelitian menunjukkan perairan memiliki tingkat kesesuaian disebut Cukup Sesuai (S2) dan Sesuai Marginal (S3). Cukup Sesuai menunjukan perairan tersebut Cukup sesuai untuk lokasi budidaya sedangkan Sesuai marginal menunjukkan perlu penanganan lebih lanjut jika ingin dijadikan lokasi budidaya. Variabel primer berupa kuesioner menunjukan bahwa sebagian masyarakat sudah cukup mengenal budidaya ikan nila dengan kepemilikan kolam secara pribadi sebanyak 53,28%

Prediction and measurement of high frequency radio frequencies in peninsular Malaysia and comparisons with the international reference ionosphere model

Prediction of High Frequency (HF) radio frequency is important in the planning and operation of HF radio system because of the highly variable ionospheric region. Therefore, there is a requirement to find reliable and accurate HF operating frequencies in the Malaysian environment. The main aim of this study was to observe and analyze the HF prediction and measurement in Peninsular Malaysia which was then compared to the IRI Model prediction. This study was carried out in the equatorial region and in the middle of solar cycle 24 which was in July and August of 2014. The HF prediction process involved two maximum usable frequency (MUF) models, and the predicted result, i.e., operating working frequency (OWF) was based on hourly monthly median values. The results show that the IRI Model overestimated MUF prediction at about 36% for July 2014 and 38% for August 2014. This indicates that the IRI Model is an inappropriate model to be used for prediction of HF operating frequency in the Malaysian region. Meanwhile, the OWF measurements were around the OWF prediction, and this indicates that the OWF measurements are in the range of the OWF prediction. Accordingly, the lower decile MUF, i.e., OWF is the right range for HF operating frequency

B(E2) value of even-even 108-112Pd isotopes by interacting boson model-1*

This work studies the systematic reduced transition probabilities B(E2), intrinsic quadrupole moments and deformation parameters of Pd isotopes with even neutrons from N= 62 to 66. The downward reduced transition probabilities B(E2) from gamma transition 8+ to 6+, 6+ to 4+, 4+ to 2+ and 2+ to 0+ states of even-even 108-112Pd isotopes were calculated by the Interacting Boson Model (IBM-1) and compared with the available previous experimental results. The ratio of the excitation energies of the first 4+ and the first 2+ excited states, R4/2, is also studied for the classification of symmetry of these nuclei. Furthermore we have studied systematically the transition rate R of some of the low-lying quadrupole collective states in comparison with the available experimental data. The associated quadrupole moments and deformation parameters have been calculated. The results of this calculation are in good agreement with the corresponding available experimental data. The 108-112Pd isotopes show the O(6) symmetry

Sensitivity-enhancing All-in-type Optical Three-axis Tactile Sensor Mounted on Articulated Robotic Fingers

AbstractIn a previous study, we developed an all-in-type optical three-axis tactile sensor to address two issues: the first is to be able to use external devices such as a CCD camera and light source; the other is the insensible zone. We miniaturized its whole structure through adoption of a CMOS board camera equipped with LEDs. Since a USB is installed in the CMOS camera as an interface, an additional image processing board is not required. Furthermore, it is equipped with a rubber dome including a sensing element array to remove the insensible zone because rubber is filled in between the sensing elements. However, even if it accepted under around 1-N force, no output of brightness appeared. In this paper, we enhance the characteristic in the low level applied force through improvement of image processing. Furthermore, the present sensor showed higher output level of normal and tangential forces through a series of experiments comparing the present and ordinal three-axis tactile sensors