Peningkatan Aktivitas Siswa dalam Pembelajaran Ilmu Pengetahuan Alam dengan Menggunakan Metode Kerja Kelompok

: Increasing Student Activity In Natural Sciences Learning Method Using Group . This study aims to determine Increased physical activity , mental activity and emotional activity Siwa in science learning using group work method in the fourth grade students of SDN 08 Estuary Pawan Ketapang? The method used is descriptive method using a qualitative approach . This study was conducted in three cycles with results indicate that students in science learning activities using group work on fourth grade students of SDN 08 Estuary Pawan 37.26 % of the base line to the third cycle of 73.04 % has increased by 35.78 % category enough . Referring to the objectives of this study ( 1 ) Physical activity students 39.71 % of the base line to the third cycle of 76.47 % at 36.76 % increase enough categories , (2 ) the mental activity of students from the base line of 42.65 to third cycle of 76.47 % 33.82 % increase enough categories , (3 ) emotional activity for students from the base line to the third cycle 29.41 . Activities students in learning science by using group work berpengruh greatly to the high class IV student learning outcomes SDN 08 Estuary Pawan Ketapang

Metastability and the Casimir Effect in Micromechanical Systems

Electrostatic and Casimir interactions limit the range of positional stability of electrostatically-actuated or capacitively-coupled mechanical devices. We investigate this range experimentally for a generic system consisting of a doubly-clamped Au suspended beam, capacitively-coupled to an adjacent stationary electrode. The mechanical properties of the beam, both in the linear and nonlinear regimes, are monitored as the attractive forces are increased to the point of instability. There "pull-in" occurs, resulting in permanent adhesion between the electrodes. We investigate, experimentally and theoretically, the position-dependent lifetimes of the free state (existing prior to pull-in). We find that the data cannot be accounted for by simple theory; the discrepancy may be reflective of internal structural instabilities within the metal electrodes.Comment: RevTex, 4 pages, 4 figure

Surgical treatment of displaced intra-articular calcaneal fracture using a single small lateral approach

The objective of this study was to evaluate the outcome of semi-open reduction and minimal internal fixation through a single small lateral approach as a minimally invasive technique for treatment of displaced intra-articular calcaneal fractures. This prospective study was conducted on eighteen patients (16 men and 2 women). The average age was 37.7 (22–55). The most common cause of injury was a fall from height in fourteen patients. Patients were operated on within a mean time of 4.8 days of admission (1–11 days) and were followed up for an average period of 24.1 months (6–39 months). Patients were evaluated clinically using the Creighton-Nebraska Heath Foundation Assessment score of Crosby and Fitzgibbons (J Bone Joint Surg (Am) 72-A:852–859, 1990). The scoring system proposed by Knirk and Jupiter was used for radiological assessment of the posterior subtalar joint (Knirk and Jupiter in J Bone Joint Surg (Am) 68-A: 647–659, 1986). The skin incision healed in all cases without necrosis, infection, or sural nerve injury. All fractures healed after an average of 8 weeks (7–10 weeks), and patients returned to the routine daily activities after an average time of 4.3 months (3–7 months). In conclusion, semi-open reduction and minimal internal fixation through a small lateral approach is an effective treatment for carefully selected cases of displaced intra-articular calcaneal fractures

Influence of random roughness on the Casimir force at small separations

The influence of random surface roughness of Au films on the Casimir force is explored with atomic force microscopy in the plate-sphere geometry. The experimental results are compared to theoretical predictions for separations ranging between 20 and 200 nm. The optical response and roughness of the Au films were measured and used as input in theoretical predictions. It is found that at separations below 100 nm, the roughness effect is manifested through a strong deviation from the normal scaling of the force with separation distance. Moreover, deviations from theoretical predictions based on perturbation theory can be larger than 100%.Comment: 18, 5 figure

The Effect Of Training Needs On Human Resources Development In Public Works Offices (PU) Jeneponto District

This study aims to determine the extent of the influence of training needs on human resource development at the Jeneponto Regency Public Works Office. This type of research used a quantitative approach. The processed data is the result of respondents from the employees of the Jeneponto Regency Public Works Office (PU) as many as 30 respondents. The data analysis method used in this study uses simple linear regression, namely the approach method for modeling the relationship between one dependent variable and one independent variable using SPSS v 18. Based on the data analysis that has been done, the simple regression equation model is obtained Y= 4.858 + 0,807 which means that the influence of the X variable has a positive effect on the development of Human Resources and from the results of the t test analysis, a significant value of 0,01 (6.772 t table 2.048) dan koefisien regresi bernilai positif sebesar 0,788

Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation

We present evidence of optical Tamm states to surface plasmon polariton (SPP) coupling. We experimentally demonstrate that for a Bragg stack with a thin metal layer on the surface, hybrid Tamm-SPP modes may be excited when a grating on the air-metal interface is introduced. Out-coupling via the grating to free space propagation is shown to enhance the transmission as well as the directionality and polarization selection for the transmitted beam. We suggest that this system will be useful on those devices, where a metallic electrical contact as well as beaming and polarization control is needed

Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation

We present evidence of optical Tamm states to surface plasmon polariton (SPP) coupling. We experimentally demonstrate that for a Bragg stack with a thin metal layer on the surface, hybrid Tamm-SPP modes may be excited when a grating on the air-metal interface is introduced. Out-coupling via the grating to free space propagation is shown to enhance the transmission as well as the directionality and polarization selection for the transmitted beam. We suggest that this system will be useful on those devices, where a metallic electrical contact as well as beaming and polarization control is needed

Stiction, Adhesion Energy and the Casimir Effect in Micromechanical Systems

We measure the adhesion energy of gold using a micromachined doubly-clamped beam. The stress and stiffness of the beam are characterized by measuring the spectrum of mechanical vibrations and the deflection due to an external force. To determine the adhesion energy we induce stiction between the beam and a nearby surface by capillary forces. Subsequent analysis yields a value $\gamma =0.06$ J/m$^{2}$ that is a factor of approximately six smaller than predicted by idealized theory. This discrepancy may be resolved with revised models that include surface roughness and the effect of adsorbed monolayers intervening between the contacting surfaces in these mesoscopic structures.Comment: RevTex, 4 pages, 4 eps figure