9,213 research outputs found

    Large evolution of the bilinear Higgs coupling parameter in SUSY models and reduction of phase sensitivity

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    The phases in a generic low-energy supersymmetric model are severely constrained by the experimental upper bounds on the electric dipole moments of the electron and the neutron. Coupled with the requirement of radiative electroweak symmetry breaking, this results in a large degree of fine tuning of the phase parameters at the unification scale. In supergravity type models, this corresponds to very highly tuned values for the phases of the bilinear Higgs coupling parameter BB and the universal trilinear coupling A0A_0. We identify a cancellation/enhancement mechanism associated with the renormalization group evolution of BB, which, in turn, reduces such fine-tuning quite appreciably without taking recourse to very large masses for the supersymmetric partners. We find a significant amount of reduction of this fine-tuning in nonuniversal gaugino mass models that do not introduce any new phases.Comment: Version to appear in Phys.Rev.D. Insignificant changes like a few typos corrected. 26 pages, 7 figures, LaTe

    Optimization a Scheduling Algorithm of CA in LTE ADV

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    Long-Term Advancement Progressed (LTE-ADV) is the advancement of the long-term evolution, which created via 3GPP. LTE-ADV aims to offer a transmission bandwidth of (100) MHz by using Carrier Aggregation (CA) to aggregate LTE-ADV carriers. To increase the data capacity of the system and resource allocation converts a very good tool. LTE-Advanced multiple Component Carriers (CCs) becomes a difficult optimization problem. In the paper proposes a new scheduling algorithm and compares with a different scheduling traditional algorithms that are proportional fair and round robin in the CA, in order to find the best scheduler that provides high-quality throughput and improves fairness. It i also evaluates mapping model types are Mutual Information Effective SINR Mapping (MIESM) and Exponential Effective SINR Mapping (EESM). The results show that the throughput in the proposed algorithm with MIESM outperforms from others mapping and scheduling

    Sistem Pendukung Keputusan Klinis untuk Mengefisienkan Diagnosa Penyakit Kejiwaan Menggunakan Case Based Reasoning

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    Gangguan skizofrenia merupakan penyakit jiwa yang sering terjadi. Akan tetapi, tidak ada sistem pendukung keputusan klinis untuk mengefisienkan diagnosa penyakit skizofrenia menggunakan case based reasoning dengan kedekatan nearest neighbor, sehingga setiap konsultasi mengalami kesulitan karena terbatasnya dokter dan membuat diagnosa kurang efisien dalam penanganannya. Terwujudnya sistem untuk mendukung keputusan pakar agar mengefisienkan diagnosa menggunakan metode case based reasoning dengan metode kedekatan nearest neighbor.Subjek penelitian adalah data rekam medis penyakit skizofrenia di Klinik Mitra Keluarga. Metode pengumpulan data dengan studi pustaka, wawancara dan observasi. Tahap pengembangan aplikasi meliputi desain basis pengetahuan, desain model, alur keputusan, pemodelan proses, pemodelan data, implementasi dan pengujian. Metode yang digunakan case based reasoning dengan metode kedekatan nearest neighbor dan pengujian menggunakan black box dan white box serta melakukan uji nilai T menggunakan paired t-test.Hasil dari penelitian adalah terbentuknya sistem pendukung keputusan klinis untuk mengefisienkan diagnosa menggunakan case based reasoning. Dari pengujian terdapat perbedaan signifikan dalam tingkat mengefisienkan diagnosa penyakit kejiwaan setelah dibangunnya sistem pendukung keputusan klinis, hal ini mengacu dengan didapatkannya nilai p = 0.002<0.05 dari hasil pengujian paired t-test. Sistem mampu mengefisienkan proses diagnosa dengan memperhitungkan kedekatan antara case base dengan target case. Penelitian ini menghasilkan sistem pendukung keputusan klinis yang dapat digunakan untuk melakukan diagnosa awal terhadap penyakit skizofreni

    Corrosion study of pipeline material for seabed sediment in tropical climate

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    Corrosive environments such as marine sediments can cause corrosion to steel pipelines at any time when certain conditions are met. Seabed sediment could cause severe corrosion damage due to its corrosiveness to the pipelines buried under it. Many consequences could take place in case if there is incident in oil/gas pipelines. Successfully identifying elements of corrosion in marine sediment would enhance the future of steel structure protection and monitoring systems. This article focuses on the behaviour of corrosion rate of steel located near shore environment and the aim is to determine the effect of sediment on corrosion of steel. To investigate that, simulated near shore sediment conditions have been used where the steel coupons buried in sediments which have different characteristics. Weight loss technique has been implemented to determine the weight loss rate of the steel specimens. Based on the results of this study, metal weight loss increases as the duration of exposure to seabed sediment environment become longer. The sea sediment simulated condition has given significant levels of corrosion. Conclusively, the corrosion rate of steel in seabed sediment located in tropical region is complicated and further studies are suggested

    Analysis and Derivation of Allocations for Fiber Contaminants in Liquid Bipropellant Systems

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    An analysis was performed to identify the engineering rationale for the existing particulate limits in MSFC-SPEC-164, Cleanliness of Components for Use in Oxygen, Fuel, and Pneumatic Systems, determine the applicability of this rationale to fibers, identify potential risks that may result from fiber contamination in liquid oxygen/fuel bipropellant systems, and bound each of these risks. The objective of this analysis was to determine whether fiber contamination exceeding the established quantitative limits for particulate can be tolerated in these systems and, if so, to derive and recommend quantitative allocations for fibers beyond the limits established for other particulate. Knowledge gaps were identified that limit a complete understanding of the risk of promoted ignition from an accumulation of fibers in a gaseous oxygen system

    Pengkajian Nyeri Pada Pasien Kritis Dengan Menggunakan Critical Pain Observation Tool(CPOT) Di Intensive Care Unit(ICU)

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    A systematic and standardised tool to assess pain experienced by critically ill patients has been previously highlighted. The BPS is the common tool used in the intensive care setting which can be used. But, the Critical Pain Observation Tool (COPT) has not been used extensively in the hospital. Thus, the efficacy of this tool needs to be examined. This descriptive observational study aimed to find an agreement of CPOT with BPS using a cross-sectional method recruited 48 participants with consecutive sampling technique. Pain assessment was performed during a resting and positioning period to check the agreement of the tools. Data was analysed using Cohen\u27s Kappa index analysis. Findings demonstrated a significance difference of pain intensity measured by BPS and CPOT during the period of resting (Îș = 0.937) and positioning (Îș = 0.265). Thus, BPS and CPOT are reliable scales to measure pain intensity. It is expected that those tools can help nurses to improve pain management for critically ill patients. However, CPOT is considered more applicable and user-friendly compared to the BPS

    Gas Turbine Configuration for Improving the performance of Combined Cycle Power Plant

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    AbstractThe thermodynamic analysis of combined cycle gas turbine with effect different configuration for gas turbine are presented and discussed in this paper. The effects of ambient temperature and compression ratio have been proposed to select optimum configuration for gas turbine and its effect on CCGT performance. The analysis performance code has been performed used the MATLAB software. The simulating code for gas turbine configuration results show that the simple gas turbine configuration is more suitable with regards to power output, but the regenerative gas turbine configuration has higher efficiency with effect ambient temperature. The simple gas turbine configuration has higher power output with effect the compression ratio, while the regenerative gas turbine configuration has higher efficiency with effect lower compression ratio, therefore the variation of total power output is insignificance at lower compression ratio. The extensive modelling performed in this study reveals that, the ambient temperature and compression ratios are strongly influence on the performance of combined cycle, a higher overall efficiency can be achieved for combined cycle with add regenerative to topping cycle

    Tyrosine kinase inhibitors for the therapy of anaplastic thyroid cancer

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    Anaplastic thyroid cancer (ATC) is often incurable so new therapeutic approaches are needed. Tyrosine kinases inhibitors (such as imanitib, sunitinib or sorafenib) are under evaluation for the treatment of ATC. Other vascular disrupting agents, such as combretastatin A4 phosphate, and antiangiogenic agents, such as aplidin, PTK787/ZK222584 and human VEGF monoclonal antibodies (bevacizumab, cetuximab), have been evaluated. Small-molecule adenosine triphosphate competitive inhibitors directed intracellularly at EGFRs tyrosine kinase, such as erlotinib or gefitinib, are also studied. Furthermore, new molecules have been shown to be active against ATC, such as CLM94 and CLM3. However, more research is needed to finally identify therapies able to control and to cure this disease

    The Determination Of K ISCC Of Mild Steel In Hot Caustic By Using Small Circumferential Notched Tensile (CNT) Fracture Toughness Specimens

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    A new technique for rapid and cost-effective determination of stress intensity factor (K I) and fracture toughness (K IC) using small circumferential notch tensile (CNT) specimens is presented and used to determine the crack growth rate of an ex-service component. The paper highlights the scope and advantages of extending this technique for assessing the susceptibility of ferrous alloys to stress corrosion cracking (SCC). A modified CNT testing rig is designed and constructed based on an existing room temperature sustained load crack testing rig by adding facilities for testing SCC susceptibility at different temperatures. The new testing rig simplifies and speeds up the testing procedure as well as provides considerable cost advantage over the conventional fracture mechanics techniques. The paper also presents results of the SCC tests carried out on mild steel (AISI 1020) using this modified CNT rig
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