Eksperimen Penerapan Pembelajaran Matematika dengan Model Student Teams Achievement Division (STAD) dan Jigsaw Terhadap Prestasi Belajar Ditinjau dari Minat Belajar Siswa Kelas VII Semester Genap SMP Muhammadiyah 4 Surakarta Tahun 2015/2016

The research is conducted to know: (1) the significant effect of learning model Student Teams Achievement Division (STAD) and Jigsaw to learning achievement of mathematics, (2) the significant effect of learning interest to learning achievement of mathematics, (3) interaction between of learning model Student Teams Achievement Division (STAD) and Jigsaw and learning interest to learning achievement of mathematics. The research is a quasi–experimental research. The population of research is all of the 7th grades of Junior High School in Muhammadiyah 4 Surakarta in academic years of 2015/2016. There are two classes used as sampling is class VIIB and VIIC. The technique of sampling is random sampling. The technique of collection data are test, questionnaire, and documentation. Technique of analyzing data used analysis of variance two different cells. The research result show that: (1) there is significant effect of learning model Student Teams Achievement Division (STAD) and Jigsaw to learning achievement of mathematics i.e. FA=4.700>Ftabel=4.07, (2) there is a significant effect of learning interest to learning achievement of mathematics i.e. FB=4.196>Ftabel=3.22, (3) there is no interaction between learning model of Student Teams Achievement Division (STAD) and Jigsaw and learning interest to learning achievement of mathematics i.e. FAB =1.116 < Ftabel = 3.22

Antibacterial effect of essential oils of two plants Eucalyptus camaldulensis and Artemisia herba alba on some bacterial strains

Essential oils are secondary plant metabolites and have many therapeutic properties. The aim of our study is to determine the antibacterial effect of the essential oils of two plants cultivated in a semi-arid region located in the Northeast of Algeria (Tebessa), Eucalyptus camaldulensis (Myrtaceae) and Artemisia herba alba (Asteraceae). The yield of essential oils of the two plants were 1.45 ± 0.026 and 1.21&nbsp;± 0.061 g/100 g of the dry matter of the aerial part respectively. The test of the antibacterial effect is based on the diffusion method on solid medium (sensitivity), this method allows us to determine the susceptibility or resistance of an organism vis-à-vis the sample studied. Our study reveals that E. camaldulensis essential oil had very strong activity on all bacterial strains tested, except on Pseudomonas aeruginosa and Enterococcus faecalis for which there was no inhibitory effect. However, A. herba alba essential oil had very strong activity on all bacterial strains tested except on Pseudomonas aeruginosa. The MIC of Artemisia essential oil ranged between 0.08 and 1.57 µL/mL, with the lowest activity for S. aureus and P. mirabilis (1.57 µL/mL) and the highest activity was observed against E. feacalis, E. coli, and K. pneumonia (0.09 µL/mL). The MIC of the second plant EO ranged between 0.08 and 0.36 µL/mL, with the lowest activity for P.&nbsp;mirabilis (0.36 µL/mL) and the highest one was observed against S. saprophyticus and E. coli (0.08 µL/mL). Statistical analysis shows that the two plants have the same efficacy against S. saprophyticus while E. faecalis, K. pneumoniae and P.&nbsp;mirabilis species are affected more by the essential oil of A. herba alba. While, E. camaldulensis has a higher efficiency than that of A.&nbsp;herba alba on the species: S.&nbsp;aureus and E. coli. Therefore, the essential oils of E. camaldulensis and A. herba alba suggests avenues for further non clinical and clinical studies

Cara Guru Memfasilitasi Siswa Dalam Pembelajaran Matematika Dengan Menggunakan Metode Guide Note Taking Pada Siswa Kelas VII SMP Negeri 2 Sawit

Penelitian ini merupakan penelitian kualitatif deskriptif yang bertujuan untuk mengungkapkan cara guru memfasilitasi pembelajaran matematika dengan topic sifat, keliling, dan luas segiempat dengan metode pembelajaran active learning tipe Guide Note Taking. Subjek penelitian adalah seorang guru matematika kelas VII di SMP Negeri 2 Sawit. Data berupacara-cara guru memfasilitasi selama proses pembelajaran berlangsung. Teknik pengumpulan data yang dilakukan melalui pengamatan secara langsung ketika proses pembelajaran berrlangsung, wawancara, observasi dan dokumentasi. Data dianalisis dengan langkah-langkah yaitu :mengadakan penafsiran data berdasarkan hasil pengamatan cara guru memfasilitasi siswa dalam pembelajaran dan penarikan kesimpulan. Hasil penelitian berupa cara-cara guru memfasilitasi pembelajaran matematika dengan topic sifat, keliling, dan luas segiempat dengan metode pembelajaran active learning tipe Guide Note Taking.Cara guru memfasilitasi pada pembelajaran terbagi dalam tiga tahap yaitu presentasi guru, tugas individu, pemberian klarifikasi

CMS Optical Links: Lessons learned from Mass Production

The CMS Tracker will install over 40000 optical links in its data-readout and control system, representing an unprecedented deployment of this technology in a Particle Physics Experiment. After reviewing the Quality Process employed in this project, a summary of the performance data measured during production will be shown. The analysis of this data will then be used to illustrate how the performance of the installed system may be predicted, giving confidence that the specified functionality will be attained in the final system. Completion of the production has allowed reflection upon the processes used and improvements for future such projects will be given in the form of some lessons learned

An artificial neural network predictor for tropospheric surface duct phenomena

International audienceIn this work, an artificial neural network (ANN) model is developed and used to predict the presence of ducting phenomena for a specific time, taking into account ground values of atmospheric pressure, relative humidity and temperature. A feed forward backpropagation ANN is implemented, which is trained, validated and tested using atmospheric radiosonde data from the Helliniko airport, for the period from 1991 to 2004. The network's quality and generality is assessed using the Area Under the Receiver Operating Characteristics (ROC) Curves (AUC), which resulted to a mean value of about 0.86 to 0.90, depending on the observation time. In order to validate the ANN results and to evaluate any further improvement options of the proposed method, the problem was additionally treated using Least Squares Support Vector Machine (LS-SVM) classifiers, trained and tested with identical data sets for direct performance comparison with the ANN. Furthermore, time series prediction and the effect of surface wind to the presence of tropospheric ducts appearance are discussed. The results show that the ANN model presented here performs efficiently and gives successful tropospheric ducts predictions

Multi-level optical signal generation using a segmented-electrode InP IQ-MZM with integrated CMOS binary drivers

We present a segmented-electrode InP IQ-MZM, capable of multi-level optical signal generation (5-bit per I/Q arm) by employing direct digital drive from integrated, low-power (1W) CMOS binary drivers. Programmable, multi-level operation is demonstrated experimentally on one MZM of the device

Semiconductor Optical Amplifier (SOA)–Based Amplification of Intensity-Modulated Optical Pulses — Deterministic Timing Jitter and Pulse Peak Power Equalization Analysis

During the last few years, large-scale efforts towards realizing high-photonic integration densities have put SOAs in the spotlight once again. Hence, the need to develop a complete framework for SOA-induced signal distortion to accurately evaluate a system’s performance has now become evident. To cope with this demand, we present a detailed theoretical and experimental investigation of the deterministic timing jitter and the pulse peak power equalization of SOA-amplified intensity-modulated optical pulses. The deterministic timing jitter model relies on the pulse mean arrival time estimation and its analytic formula reveals an approximate linear relationship between the deterministic timing jitter and the logarithmic values of intensity modulation when the SOA gain recovery time is faster than the pulse period. The theoretical analysis also arrives at an analytic expression for the intensity modulation reduction (IMR), which clearly elucidates the pulse peak power equalization mechanism of SOA. The IMR analysis shows that the output intensity modulation depth is linearly related to the respective input modulation depth of the optical pulses when the gain recovery time is faster than the pulse period. This novel theoretical platform provides a qualitative and quantitative insight into the SOA performance in case of intensity-modulated optical pulses

Data acquisition software for the CMS strip tracker

The CMS silicon strip tracker, providing a sensitive area of approximately 200 m2 and comprising 10 million readout channels, has recently been completed at the tracker integration facility at CERN. The strip tracker community is currently working to develop and integrate the online and offline software frameworks, known as XDAQ and CMSSW respectively, for the purposes of data acquisition and detector commissioning and monitoring. Recent developments have seen the integration of many new services and tools within the online data acquisition system, such as event building, online distributed analysis, an online monitoring framework, and data storage management. We review the various software components that comprise the strip tracker data acquisition system, the software architectures used for stand-alone and global data-taking modes. Our experiences in commissioning and operating one of the largest ever silicon micro-strip tracking systems are also reviewed

A Gas Leak Rate Measurement System for the ATLAS MUON BIS-Monitored Drift Tubes

A low-cost, reliable and precise system developed for the gas leak rate measurement of the BIS-Monitored Drift Tubes (MDTs) for the ATLAS Muon Spectrometer is presented. In order to meet the BIS-MDT mass production rate, a total number of 100 tubes are tested simultaneously in this setup. The pressure drop of each one of the MDT is measured, within a typical time interval of 48 hours, via a differential manometer comparing with the pressure of a gas tight reference tube. The precision of the method implemented is based on the system temperature homogeneity, with accuracy of ÄT = 0.3 oC. For this reason, two thermally isolated boxes are used testing 50 tubes each of them, to achieve high degree of temperature uniformity and stability. After measuring several thousands of the MDTs, the developed system is confirmed to be appropriate within the specifications for testing the MDTs during the mass production