Desain Media Pembelajaran Fisika Interaktif pada Materi Momen Inersia Benda Tegar dengan Menggunakan Program Autodesk 3ds Max 2010 dan Adobe Director 11.5

Penggunaan media dalam pembelajaran berfungsi untuk mempermudah penyampaian informasi, memvisualisasikan materi dengan baik, dan membuat pembelajaran menjadi lebih menarik. Fisika merupakan salah satu cabang dari Ilmu Pengetahuan Alam (IPA) yang materi-materi pembelajarannya berkaitan langsung dengan konteks kehidupan nyata. Oleh karena itu, diperlukan adanya media visual untuk memudahkan penyampaian materinya. Penelitian pengembangan ini bertujuan untuk mendesain dan menghasilkan media pembelajaran fisika interaktif pada materi momen inersia benda tegar dengan menggunakan program Autodesk 3ds Max 2010 dan Adobe Director 11.5. Penelitian ini dilaksanakan dalam tiga tahap yaitu tahap awal (studi pustaka, instalasi software, analisis), tahap pembuatan (pengumpulan konten, pengembangan, publish hasil), dan tahap evaluasi (penyesuaian kerangka konseptual, pencocokan materi, evaluasi, revisi, mengemas media pembelajaran). Berdasarkan hasil penelitian dapat disimpulkan program Autodesk 3ds Max 2010 dan Adobe Director 11.5 dapat digunakan untuk mendesain media pembelajaran fisika interaktif pada materi momen inersia benda tegar

Apollo 15 rake sample microbreccias and non-mare rocks: Bulk rock, mineral and glass electron microprobe analyses

Quantitative electron microprobe data of Apollo 15 nonmare rake samples are presented. Bulk analyses of lithic fragments in the nomare rocks (expressed in oxide weight-percent) and the corresponding CIPW molecular norms are given. The mineralogy of the rocks and lithic fragments are also given; structural formulae for complete analyses and molecular end-members for all mineral analyses are included. The mineral analyses include pyroxene, olivine, plagioclase, barian K-feldspar, spinel and ilmenite, cobaltian metallic nickel-iron as well as SiO2-K2O-rich residual glass. Electron micropobe analyses (oxide weight percent) of glasses in loose fines and microbreccia samples and their CIPW molecular norms are presented along with electron microprobe data on bulk, mineral, and matrix glass from chondrules

Comparison of Tracking-By-Detection Algorithms for Real-Time Satellite Component Tracking

With space becoming more and more crowded, there is a growing demand for increasing satellite lifetimes and performing on-orbit servicing (OOS) at a scale that calls for autonomous missions. Many such missions would require chaser satellites to autonomously execute safe and effective flightpath to dock with a non-cooperative target satellite on orbit. Performing this autonomously requires the chaser to be aware of hazards to route around and safe capture points through time, i.e., by first identifying and tracking key components of the target satellite. State-of-the-art object detection algorithms are effective at detecting such objects on a frame-by-frame basis. However, implementing them on a real-time video feed often results in poor performance at tracking objects over time, making errors which could be easily corrected by rejecting non-physical predictions or by exploiting temporal patterns. On the other hand, dedicated object tracking algorithms can be far too computationally expensive for spaceflight computers. Considering this, the paradigm of tracking-by-detection works by incorporating patterns of prior-frame detections and the corresponding physics in tandem with a base object detector. This paper focuses on comparing the performance of object tracking-by-detection algorithms with a YOLOv8 base object detector: namely, BoTSORT and ByteTrack. These algorithms are hardware-in-the-loop tested for autonomous spacecraft component detection for a simulated tumbling target satellite. This will emulate mission conditions, including motion and lighting, with a focus on operating under spaceflight computational and power limitations, providing an experimental comparison of performance. Results demonstrate lightweight tracking-by-detection can improve the reliability of autonomous vision-based navigation

The Welfare Cost of Argentine Risk

In this paper we do a couple of things: discussing a way to measure the welfare cost of country risk, and measuring it for Argentina in the period 1875-2006. There are two conclusions: a) the welfare cost of Argentine risk has been huge: for example, in the period 1976-2006 it was around 20% of GDP, several times larger than the welfare cost of any conventional distortion; b) this cost would be wholly paid by labor. These fascinating results deserve further investigation

Electron Microprobe Analyses of Lithic Fragments and Their Minerals from Luna 20 Fines

The bulk analyses (determined with the broad beam electron microprobe technique) of lithic fragments are given in weight percentages and are arranged according to the rock classification. Within each rock group the analyses are arranged in order of increasing FeO content. Thin section and lithic fragment numbers are given at the top of each column of analysis and correspond to the numbers recorded on photo mosaics on file in the Institute of Meteoritics. CIPW molecular norms are given for each analysis. Electron microprobe mineral analyses (given in oxide weight percentages), structural formulae and molecular end member values are presented for plagioclase, olivine, pyroxene and K-feldspar. The minerals are selected mostly from lithic fragments that were also analyzed for bulk composition. Within each mineral group the analyses are presented according to the section number and lithic fragment number. Within each lithic fragment the mineral analyses are arranged as follows: Plagioclase in order of increasing CaO; olivine and pyroexene in order of increasing FeO; and K-feldspar in order of increasing K2O. The mineral grains are identified at the top of each column of analysis by grain number and lithic fragment number

Evaluation of physicochemical characteristics and antimicrobial activities of copper oxide nanoparticles formed by the solution combustion method

In this paper, copper oxide (CuO) nanoparticles (NPs) was prepared by solution combustion technique. We used copper nitrate as an oxidizer and malic acid as a fuel to make three different CuO NPs by using different fuel ratios: low (M1), stoichiometric (M2), and high (M3). The XRD patterns show that the CuO NPs have the monoclinic structure with an average grain size of 17, 20, and 18 nm corresponding to M1, M2, and M3 respectively. The SEM images revealed that the CuO NPs prepared display bush as morphology consisting of a wheat-like structure for M1, rod-like structure for M2, and sheet-like structure for M3 sample. The FTIR spectrum shows that CuO NPs is successfully formed in all of the samples. A bandgap of around 3.26 eV can be seen in the UV-Vis spectrum. Also, the three samples are possessing antibacterial activity and are influenced by the crystalline size, shape, purity, and uniformity of the crystals. Among the three samples with a difference of morphology, the most influencing factor of antibacterial activity being the shape that of other larger-sized particles

Alteration of Neuropilin‑1 and Heparan Sulfate Interaction Impairs Murine B16 Tumor Growth

Neuropilin-1 acts as a coreceptor with vascular endothelial growth factor receptors to facilitate binding of its ligand, vascular endothelial growth factor. Neuropilin-1 also binds to heparan sulfate, but the functional significance of this interaction has not been established. A combinatorial library screening using heparin oligosaccharides followed by molecular dynamics simulations of a heparin tetradecasaccharide suggested a highly conserved binding site composed of amino acid residues extending across the b1 and b2 domains of murine neuropilin-1. Mutagenesis studies established the importance of arginine513 and lysine514 for binding of heparin to a recombinant form of Nrp1 composed of the a1, a2, b1, and b2 domains. Recombinant Nrp1 protein bearing R513A,K514A mutations showed a significant loss of heparin-binding, heparin-induced dimerization, and heparin-dependent thermal stabilization. Isothermal calorimetry experiments suggested a 1:2 complex of heparin tetradecasaccharide:Nrp1. To study the impact of altered heparin binding in vivo, a mutant allele of Nrp1 bearing the R513A,K514A mutations was created in mice (Nrp1D) and crossbred to Nrp1+/- mice to examine the impact of altered heparan sulfate binding. Analysis of tumor formation showed variable effects on tumor growth in Nrp1D/D mice, resulting in a frank reduction in tumor growth in Nrp1D/- mice. Expression of mutant Nrp1D protein was normal in tissues, suggesting that the reduction in tumor growth was due to the altered binding of heparin/heparan sulfate to neuropilin-1. These findings suggest that the interaction of neuropilin-1 with heparan sulfate modulates its stability and its role in tumor formation and growth

RhoD regulates cytoskeletal dynamics via the actin nucleation-promoting factor WASp homologue associated with actin Golgi membranes and microtubules

The Rho GTPases have mainly been studied in association with their roles in the regulation of actin filament organization. These studies have shown that the Rho GTPases are essential for basic cellular processes, such as cell migration, contraction, and division. In this paper, we report that RhoD has a role in the organization of actin dynamics that is distinct from the roles of the better-studied Rho members Cdc42, RhoA, and Rac1. We found that RhoD binds the actin nucleation–promoting factor WASp homologue associated with actin Golgi membranes and microtubules (WHAMM), as well as the related filamin A–binding protein FILIP1. Of these two RhoD-binding proteins, WHAMM was found to bind to the Arp2/3 complex, while FILIP1 bound filamin A. WHAMM was found to act downstream of RhoD in regulating cytoskeletal dynamics. In addition, cells treated with small interfering RNAs for RhoD and WHAMM showed increased cell attachment and decreased cell migration. These major effects on cytoskeletal dynamics indicate that RhoD and its effectors control vital cytoskeleton-driven cellular processes. In agreement with this notion, our data suggest that RhoD coordinates Arp2/3-dependent and FLNa-dependent mechanisms to control the actin filament system, cell adhesion, and cell migration

A pragmatic methodology for studying international practices

Practice turn marks an important advancement in International Relations theorizing. In challenging abstract meta-theoretical debates, practice theorizing in International Relations aims to get close to the lifeworld(s) of the actual practitioners of politics. Scholars from different positions such as constructivism, critical theory, and post-structuralism have critically interrogated the analytical framework of practices in international politics. Building upon these works, we are concerned with a question of how to examine the context of international practices that unfolds in multiple ways in practitioners’ performances. Our central thesis is that a distinct pragmatic methodology offers an opportunity to keep with the practice turn and avoid the problematic foundational moves of mainstream practice theorizing. This involves foregrounding three interrelated processes in examining practices: the role of exceptions in the normal stream of performances, normative uptake of the analysts, and the semantic field that actors navigate in political performances. We argue that this methodology is predicated on its usefulness to interpret practices through reflective social-science inquiry

Meteorites on Mars observed with the Mars Exploration Rovers

Reduced weathering rates due to the lack of liquid water and significantly greater typical surface ages should result in a higher density of meteorites on the surface of Mars compared to Earth. Several meteorites were identified among the rocks investigated during Opportunity’s traverse across the sandy Meridiani plains. Heat Shield Rock is a IAB iron meteorite and has been officially recognized as ‘‘Meridiani Planum.’’ Barberton is olivine-rich and contains metallic Fe in the form of kamacite, suggesting a meteoritic origin. It is chemically most consistent with a mesosiderite silicate clast. Santa Catarina is a brecciated rock with a chemical and mineralogical composition similar to Barberton. Barberton, Santa Catarina, and cobbles adjacent to Santa Catarina may be part of a strewn field. Spirit observed two probable iron meteorites from its Winter Haven location in the Columbia Hills in Gusev Crater. Chondrites have not been identified to date, which may be a result of their lower strengths and probability to survive impact at current atmospheric pressures. Impact craters directly associated with Heat Shield Rock, Barberton, or Santa Catarina have not been observed, but such craters could have been erased by eolian-driven erosion.Additional co-authors: DW Ming, RV Morris, PA de Souza Jr, SW Squyres, C Weitz, AS Yen, J Zipfel, T Economo