Desain Tulangan Lentur Pelat pada Struktur Flat Plate Ber-hollow ¬Dua Arah dengan Metode Lebar Efektif

Untuk mendesain tulangan pelat pada struktur flat plate ber-hollow dua arah perlu penyederhanaan dari bentuk distribusi tegangan yang terjadi, caranya adalah dengan memanfaatkan lebar efektif dari column strip area dan middle strip area, dengan cara ini bentuk momen yang berkontur 3-dimensi diubah menjadi lembaran-lembaran 2-dimensi yang sederhana. Metode desain tulangan memanfaatkan lebar efektif pelat dari struktur flat plate ber-hollow dua arah yang menggunakan hollow berbentuk trapesium, selanjutnya tegangan pelat yang sebelumnya tidak merata didistribusikan merata pada lebar efektif pelatnya dengan konsep redistribusi momen. Hasil desain lentur dengan menggunakan tulangan ber-diameter 13 mm maka diperoleh spasi terkecil dan terbesar pada column strip sebesar 75 mm dan 140 mm, sedangkan spasi terkecil dan terbesar pada middle strip adalah sama besar yakni 140 mm. Hal ini membuktikan bahwa tegangan pada bagian column strip terbilang lebih bervariasi, sedangkan pada bagian middle strip terbilang relatif kecil dan sama besar. Kata kunci - Lebar Efektif Pelat, Redistribusi Mome

Analisis Kuat Tarik Kayu Menggunakan PKKNI 1961 dan SNI 7973:2013

Use of wood construction in Indonesia is decrease significant than concrete and steel. While it is, government by National Standardization Corporation (BSN) had been published Indonesian National Standard about Wood Construction Design Spesification with code SNI 7973:2013. This code absolutly influential the old code which is PKKNI 1961. SNI 7973:2013 is regulate about Load Resistance Factor Design (LRFD) and Allowable Stress Design (ASD), while PKKNI 1961 juts use ASD method. In case SNI 7973:2013 have been use ASD, but it is different to PKKNI 1961. This research is would to find the different betwen SNI 7973:2013 and PKKNI 1961 to tension member with dimention 5/10, 6/12, 8/12 and 10/10. Result of research to tension member show that LRFD 100%, ASD 65,1% and PKKNI 111,4%

Aspek Ekonomi Pengusahaan Taman Buru Masigit Kareumbi Kabupaten Sumedang Jawa Barat (the Economic Aspect of the Exertion Masigit Kareumbi Hunting Park in the Regency of Sumedang West Java)

Masigit Kareumbi Hunting Park (MKHP) as one of the 14 hunting parks exist in Indonesia has a prospective future. The potency of biophysic area which cover the area, accessibility, topography and vegetation condition can prospectively be exerted. In the other side, there is a tendency to exert hunting sport either for domestic hunters or foreigen hunters is a good chance for MKHP improvement. This research is aimed at analyzing economic prospect of MKHP exertion through the calculation of Net Present Value (NPV), Benefits Cost Ratio (BCR) and Internal Rate of Return (IRR). MKHP area has a natural power of attraction like flora, fauna, ecosystem or natural phenomenon to be developed through hunting activity, natural tourism, cultures, research, science and embrio supply for cultivation. Based on the analisys, the main activity for improving MKHP is by setting the plan, enclave relocation, infra structure establishment and the other things which support it. Besides to fulfill the conservation function, the preservation of habitat and population must be greatly paid attention. Two options are done to analyze this, that is through (1) exerting MKHP in the aspect of hunting and ecotourism, and (2) exerting MKHP in the aspect special hunting. The financial analysis shows that the MKHP exertion with the price $1.500 and$ 750 for deer and $150 and$ 100 for pig (trophy and non trophy) in the rate of 9% from hunting and ecotourism it gains NPV Rp 50.160.631.000,00 and BCR 1,677 (with breeding). But the exertion without breeding it gains NPV Rp 24.955.315.000,00 and BCR 1,476. The exertion through both scenarios is reasonable to do. The exertion from special hunting with breeding scenario is obtained NPV Rp 36.896.371.000,00 and BCR 1,548. The MKHP exertion through the special hunting without breeding result NPV Rp 19.2933690.000,00 and BCR 1,386. This means the exertion is acceptable

ASPEK EKONOMI PENGUSAHAAN TAMAN BURU MASIGIT KAREUMBI KABUPATEN SUMEDANG JAWA BARAT (The Economic Aspect of the Exertion Masigit Kareumbi Hunting Park in the Regency of Sumedang West Java)

Masigit Kareumbi Hunting Park (MKHP) as one of the 14 hunting parks exist in Indonesia has a prospective future. The potency of biophysic area which cover the area, accessibility, topography and vegetation condition can prospectively be exerted. In the other side, there is a tendency to exert hunting sport either for domestic hunters or foreigen hunters is a good chance for MKHP improvement. This research is aimed at analyzing economic prospect of MKHP exertion through the calculation of Net Present Value (NPV), Benefits Cost Ratio (BCR) and Internal Rate of Return (IRR). MKHP area has a natural power of attraction like flora, fauna, ecosystem or natural phenomenon to be developed through hunting activity, natural tourism, cultures, research, science and embrio supply for cultivation. Based on the analisys, the main activity for improving MKHP is by setting the plan, enclave relocation, infra structure establishment and the other things which support it. Besides to fulfill the conservation function, the preservation of habitat and population must be greatly paid attention. Two options are done to analyze this, that is through (1) exerting MKHP in the aspect of hunting and ecotourism, and (2) exerting MKHP in the aspect special hunting. The financial analysis shows that the MKHP exertion with the price $1.500 and$ 750 for deer and $150 and$ 100 for pig (trophy and non trophy) in the rate of 9% from hunting and ecotourism it gains NPV Rp 50.160.631.000,00 and BCR 1,677 (with breeding). But the exertion without breeding it gains NPV Rp 24.955.315.000,00 and BCR 1,476. The exertion through both scenarios is reasonable to do. The exertion from special hunting with breeding scenario is obtained NPV Rp 36.896.371.000,00 and BCR 1,548. The MKHP exertion through the special hunting without breeding result NPV Rp 19.2933690.000,00 and BCR 1,386. This means the exertion is acceptable.Keyword : Activity development, cost, benefits, opportunity, resources potenc

Developing of Sustainability Balanced Scorecard for the Chemical Industry: Preliminary Evidence from a Case Analysis

Companies today operate in an increasingly turbulent environment, with multiple (and sometimes competing) demands. Among these there is sustainability. No longer merely a buzzword, sustainability is becoming a mainstay of organizational operations, and a strategic pre-requisite for long term competitive advantages and business excellence. Crafting and implementing of strategy adapted to the company’s external context and internal resources and capabilities are fundamental, and sustainability needs to be a central element to any such strategy. As such, tools are required that can bring these components together. Long used for performance management and strategic management more generally, the Balanced Scorecard (BSC) could plausibly constitute such a framework, if appropriately extended to include sustainability concerns. The aim of this paper is thus to develop such an extension, through creation of a Sustainability Balanced Scorecard (SBSC), which includes social and environmental perspectives and their interactions with the traditional perspectives. We outline the structure for a SBSC, which takes companies’ overall sustainability objectives into account, as well as the steps required for its development. A case study of the formation and introduction of a “credible” sustainability strategy in the chemical industry is presented. The results demonstrate the usefulness of the SBSC in pursuing sustainability strategies, and provide preliminary evidence that introduction of such a system is likely to lead to fundamental changes in the way a company is managed. Practical implications and managerial guidelines are also reported

Critical Thinking Activities and the Enhancement of Ethical Awareness: An application of a ‘Rhetoric of Disruption’ to the undergraduate general education classroom

This article explores how critical thinking activities and assignments can function to enhance students’ ethical awareness and sense of civic responsibility. Employing Levinas’s Othercentered theory of ethics, Burke’s notion of ‘the paradox of substance’, and Murray’s concept of ‘a rhetoric of disruption’, this article explores the nature of critical thinking activities designed to have students question their (often taken-for-granted) moral assumptions and interrogate their (often unexamined) moral identities. This article argues that such critical thinking activities can trigger a metacognitive destabilization of subjectivity, understood as a dialectical prerequisite (along with exposure to otherness) for increased ethical awareness. This theoretical model is illustrated through a discussion of three sample classroom activities designed to destabilize moral assumptions and identity, thereby clearing the way for a heightened acknowledgment of otherness. In so doing, this article provides an alternative (and dialectically inverted) strategy for addressing one of the central goals of many General Education curricula: the development of ethical awareness and civic responsibility. Rather than introducing students to alternative perspectives and divergent cultures with the expectation that heightened moral awareness will follow, this article suggests classroom activities and course assignments aimed at disrupting moral subjectivity and creating an opening in which otherness can be more fully acknowledged and the diversity of our world more fully appreciated

Kajian Kinerja Bagian Jalinan (Studi Kasus : Jl. Niaga 1 – Jl. Yos Sudarso, Kota Tarakan)

This study aims to determine the performance on a single weave that occurred on Jl.Niaga I - Jl. Yos Sudarso, Tarakan City. The performance is capacity, degree of saturation, speed, and travel time. With these performance parameters serve as based of planning in transportation infrastructure. The results of this study are also expected to provide recommendations to users, planners and policy makers in an effort to solve traffic problems, especially to reduce the delay that occurs in a single wave that occurred on Jl Niaga I-Jl. Yos Sudarso Kota Tarakan

Theoretical study of the thermal behavior of free and alumina-supported Fe-C nanoparticles

The thermal behavior of free and alumina-supported iron-carbon nanoparticles is investigated via molecular dynamics simulations, in which the effect of the substrate is treated with a simple Morse potential fitted to ab initio data. We observe that the presence of the substrate raises the melting temperature of medium and large $Fe_{1-x}C_x$ nanoparticles ($x$ = 0-0.16, $N$ = 80-1000, non- magic numbers) by 40-60 K; it also plays an important role in defining the ground state of smaller Fe nanoparticles ($N$ = 50-80). The main focus of our study is the investigation of Fe-C phase diagrams as a function of the nanoparticle size. We find that as the cluster size decreases in the 1.1-1.6-nm-diameter range the eutectic point shifts significantly not only toward lower temperatures, as expected from the Gibbs-Thomson law, but also toward lower concentrations of C. The strong dependence of the maximum C solubility on the Fe-C cluster size may have important implications for the catalytic growth of carbon nanotubes by chemical vapor deposition.Comment: 13 pages, 11 figures, higher quality figures can be seen in article 9 at http://alpha.mems.duke.edu/wahyu

Synthesis, Comparative Characterization and Photocatalytic Application of SnO2/MWCNT Nanocomposite Materials

Two different preparation methods were developed to cover successfully multi-walled carbon nanotubes (MWCNT) with tin-dioxide (SnO2) nanoparticles using SnCl2.2H2O as precursor under different solvent conditions. The applied mass ratios of the components were 1:4, 1:8, 1:16, 1:32 and 1:64, respectively. As-prepared tin-dioxide coverages were characterized by TEM, SEM, SEM-EDX, Raman microscopy, BET and X-ray diffraction techniques. Photocatalytic efficiencies of selected composites were investigated in a self-made photoreactor, equipped with UV-A fluorescence lamps. Photocatalytic degradation of phenol solution was followed by using HPLC. Observations revealed that using hydrothermal method we can easily control the layer of SnO2 nanoparticles on the surface of MWCNTs. Using various solvents SnO2 nanoparticles with different morphologies formed. The nanocomposites have low photocatalytic efficiencies under conditions used generally (when lambda>300 nm)

A Study of the Formation of Single- and Double-Walled Carbon Nanotubes by a CVD Method

The reduction in H2/CH4 atmosphere of aluminum-iron oxides produces metal particles small enough to catalyze the formation of single-walled carbon nanotubes. Several experiments have been made using the same temperature profile and changing only the maximum temperature (800-1070 °C). Characterizations of the catalyst materials are performed using notably 57Fe Mo¨ssbauer spectroscopy. Electron microscopy and a macroscopical method are used to characterize the nanotubes. The nature of the iron species (Fe3+, R-Fe, ç-Fe-C, Fe3C) is correlated to their location in the material. The nature of the particles responsible for the high-temperature formation of the nanotubes is probably an Fe-C alloy which is, however, found as Fe3C by postreaction analysis. Increasing the reduction temperature increases the reduction yield and thus favors the formation of surface-metal particles, thus producing more nanotubes. The obtained carbon nanotubes are mostly single-walled and double-walled with an average diameter close to 2.5 nm. Several formation mechanisms are thought to be active. In particular, it is shown that the second wall can grow inside the first one but that subsequent ones are formed outside. It is also possible that under given experimental conditions, the smallest (<2 nm) catalyst particles preferentially produce double-walled rather than single-walled carbon nanotubes