PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS MEDIA SOSIAL INSTAGRAM PADA MATERI TRANSFORMASI FUNGSI DAN INVERS FUNGSI

Penelitian ini bertujuan untuk mengembangkan media pembelajaran menggunakan media sosial Instagram dan mengetahui kelayakannya. Penelitian ini merupakan penelitian pengembangan dengan model ADDIE yang melalui 5 tahapan yaitu Analysis, Design, Development, Implementation, dan Evaluation. Uji coba produk dilakukan pada uji coba lapangan utama di kelas XII MIPA 2 dengan jumlah 31 peserta didik SMA Negeri 1 Ngemplak. Teknik pengumpulan data menggunakan angket validasi dan angket respon peserta didik. Teknik analisis data secara deskriptif kualitatif dan kuantitatif. Hasil penelitian berupa video pembelajaran yang di upload di akun Instagram @matematikia.asik. Berdasarkan penilaian validator Instagram pembelajaran dikategorikan valid dengan hasil validasi media dan materi diperoleh skor rata- rata 3,93, angket repon peserta didik dengan hasil skor rata- rata sebesar 3,55 dalam kategori baik sehingga, media pembelajaran berbasis media sosial Instagram layak dan efektif digunakan dalam proses pembelajaran

DESAIN SENSOR JARAK DENGAN OUTPUT SUARA SEBAGAI ALAT BANTU JALAN BAGI PENYANDANG TUNA NETRA

Sense of vision is one source of vital information to human. It is not excessive if it is being pointed out that the most of information which has been acquired by humans comes from the senses of vision, while the remainder comes from other senses. Thus are, it can be realized that if someone gate some problems with their sense of vision, so their ability to do their activity will be greatly reduced, this is because the information they obtain will be greatly reduced when compared with those with normal vision. In general, the physically blind persons using a white cane or a trained dog to assist the movement and enhance the safety and independence at the time of walking. By having enough information to route that will be passed, persons with visual impairment can be more convenient to navigate in an unknown environment. To solve those problems, we will make a system which can replace and refine the mobility aid which has been existed. This system uses the remaining steps toward an obstacle as the output which expected that it can simplify and make safer the user to navigate in outdoor. On this system calculation error of distance conversion is 4,03 and 4,3 when the system on use to calculate step length. Distance calculation step process takes an average of 5.8 seconds or similar with 4-5 steps while for object detection process takes 1 to 2.5 seconds depending on the type of object being detected. Key Word : Blind, walker, walk sensor, navigation

Quasicontinuum γ\gamma-decay of 91,92^{91,92}Zr: benchmarking indirect (n,γn,\gamma) cross section measurements for the ss-process

Nuclear level densities (NLDs) and $\gamma$-ray strength functions ($\gamma$SFs) have been extracted from particle-$\gamma$ coincidences of the $^{92}$Zr($p,p' \gamma$)$^{92}$Zr and $^{92}$Zr($p,d \gamma$)$^{91}$Zr reactions using the Oslo method. The new $^{91,92}$Zr $\gamma$SF data, combined with photonuclear cross sections, cover the whole energy range from $E_{\gamma} \approx 1.5$~MeV up to the giant dipole resonance at $E_{\gamma} \approx 17$~MeV. The wide-range $\gamma$SF data display structures at $E_{\gamma} \approx 9.5$~MeV, compatible with a superposition of the spin-flip $M1$ resonance and a pygmy $E1$ resonance. Furthermore, the $\gamma$SF shows a minimum at $E_{\gamma} \approx 2-3$~MeV and an increase at lower $\gamma$-ray energies. The experimentally constrained NLDs and $\gamma$SFs are shown to reproduce known ($n, \gamma$) and Maxwellian-averaged cross sections for $^{91,92}$Zr using the {\sf TALYS} reaction code, thus serving as a benchmark for this indirect method of estimating ($n, \gamma$) cross sections for Zr isotopes.Comment: 10 pages and 9 figure

Bifurcations of the global stable set of a planar endomorphism near a cusp singularity

The dynamics of a system defined by an endomorphism is essentially different from that of a system defined by a diffeomorphism due to interaction of invariant objects with the so-called critical locus. A planar endomorphism typically folds the phase space along curves J0 where the Jacobian of the map is singular. The critical locus, denoted J1, is the image of J0. It is often only piecewise smooth due to the presence of isolated cusp points that are persistent under perturbation. We investigate what happens when the stable set Ws of a fixed point or periodic orbit interacts with J1 near such a cusp point C1. Our approach is in the spirit of bifurcation theory, and we classify the different unfoldings of the codimension-two singularity where the curve Ws is tangent to J1 exactly at C1. The analysis uses a local normal-form setup that identifies the possible local phase portraits. These local phase portraits give rise to different global manifestations of the behavior as organized by five different global bifurcation diagrams. © 2008 World Scientific Publishing Company

Simulasi dan Disain Mesin Penanam Kentang

In line with regional development programs of horticulture, potato is a strategic commodity to support food security. However, recently, the difficulty and high cost of labor in the cultivation of potatoes became a constraint in supporting the government's program. Therefore, it is needed a breakthrough by using appropriate mechanization technology. Bythis effort, the difficulties of farmers may soon be resolved by introducing this technology, ICAERD has been conducted design and development of potato planter. This planter has a fairly high difficulty because the seed of potatoes have certain characteristics that are easily damage if it is not handled properly and has relatively non-uniform tubers. Therefore, designof potato planter was begun with a simulator to test in the laboratory related to the design of metering device, hopper and rotation of metering device associated with plant spacing. In planning, the design was also considered a variety of factors such as factors that is affected by the land condition, user target and level of technology. Test performance refers to  standard testing procedures for potato planter generated by hand tractor (walking type).Field test of potato planter generated by hand tractor with a power of 6.34 kW (8.5 HP) and a weight of 200 kg, the operation speed of 1.7 km / hour with one row planting and working capacity was 8 hours / ha, slip was 6.3% and the working efficiency was 75%.Keywords: simulation, design, performance test, walking type, potato plante

Struktur Populasi Trichogrammatoidea armigera, Parasitoid Telur Helicoverpa armigera, Berdasarkan Analisis RAPD-PCR

Population Structure of Trichogrammatoidea armigera,Egg Parasitoid of Helicoverpa armigera Based on RAPDPCRAnalysis. Bahagiawati, Damayanti Buchari, Nurindah,H. Rizjaani, Dwinita W. Utami, B. Sahari, and A.Sari. Genetic structures of Trichogrammatoidea armigera(Hymenoptera: Trichogrammatidae), the egg parasitoid ofHelicoverpa armigera (Lepidoptera: Noctuidae) were studied.Egg masses of H. armigera were collected from fields ofseveral locations in West Java and East Java with differentdistances among them and two distinct cultural practices,i.e., monoculture and polyculture. Genetic relationshipsamong T. armigera populations that emerged from the collectedH. armigera eggs were analysed by the RAPD-PCRtechnique using four oligonucleotide primers. The fourprimers revealed 55 presumptive polymorphic loci that wereused to estimate the population structures. The estimatedvalues of Fixation Index (Fst) was 0.16, indicating that therewas a division of the populations into subpopulations. ThisFst value implied the present of reproductive isolationamong the populations that might be due to their lowmigration rate (1.3 insect per generation). This low migrationrate indicated the present of low level of gene flow amongthe populations. A dendrogram resulted from the NTSYSanalysis indicated that the West Java and East Java populationsof the egg parasitoid had quite wide genetic distances,while within each of the populations there was a subdivisionof minor populations. This finding has an important implicationon the program to release Trichogramma spp. as a biologicalcontrol agent. The release of the parasitoid cannot bedone randomly, because if we pick up a minor population,the starter or the released population will mate with thelocal population and multiply, thus the inundation will fail tocontrol the target pest

Small States in the Rearview Mirror: Legitimacy in the Management of Economy and Society

Small States in World Markets is about political efficacy and legitimation rather than scoring who is ahead in the economic sweepstakes. Its case for democratic corporatism rests on norms, particularly stability, rather than on narrow measures of economic efficiency. But stability and the efficacious management of the economy and social problems requires a degree of technocracy that undermines the legitimacy of the management process itself by helping to produce populist revolts