Integrated communication and control systems (ICCS) consist of several distributed processes which share a network medium. Performance feedback loops in the ICCS is subject to network-induced delays from sensor controller actuator. The are directly dependent upon data sampling times components In this study, scheduling algorithm determining developed using window concept, where sampled limited number windows, so that performance requirement each loop satisfied as well utilization resources...

In the present study, biosynthesized silica-based zinc oxide nanocomposites (nano-SZO) have been explored as nanoadsorbent for sequestrating heavy metal ions viz. Ni2+, Cd2+and Cu2+ from synthetic medium. The obtained by utilization of agricultural waste means green approach with an average particle size 30.52 nm and a pH at zero-point charge 4.8. process has optimized equal to 5.0 Ni2+ 6.0 Cd2+. Adsorption was best described Langmuir isotherm highest value maximum adsorption capacity, qm...

Abstract Recently, the display of liquid crystal having blue phase have been studied more intensively because it has many merits such as wide viewing angle without compensation films, very fast switching response time, and no need for alignment layer rubbing process. First, we confirmed feasibility by means polymer stabilization in test cell. Even though could get a temperature range that shows phase, there were still problems high operation voltage, hysteresis so on. In 2008, developing...

과학 기술 경쟁 시대라는 시대적 흐름에 따라 세계 주요 국가들이 STEAM 교육에 주목하고 있다. 우리나라 과학교육의 목적이 과학적 소양을 지닌 창의적 인재 육성이라는 점에서 보면 교육의 필요성은 부정할 수 없는 사실이다. 이에 본 연구에서는 초등학교 6학년 교과에서 활동과 흥미를 고려한 주제 중심의 통합교육 프로그램을 개발하여 초등학생의 창의성 및 과학교과 흥미도에 어떤 영향을 주는지 알아보고자 하였다. 연구에서 개발한 교육 프로그램은 각 단원별 마무리 활동에 단원 정리 심화 보충활동으로 적용할 있도록 개발하였다. 주제별 활동중심의 프로그램으로 학생들의 학습을 통해서 흥미도를 높이는데 주안점을 두었다. J도내 3개 학생들에게 사전 사후에 투입한 결과, 실험 집단은 비교 집단에 비해 초등학생들의 교과 흥미도가 유의미하게 향상되었다. 따라서 지속적이며 체계적인 프로그램의 개발이 요구되며, 더 나아가서는 전 학년에 걸쳐 있는 개발하고 교육현장에서 적극적으로 활용하려는 노력이...

Lighting control systems provide various benefits in building management, and automation network (BACnet) is an international standard data communication protocol for networks. We introduce a reference model BACnet-based lighting evaluate its performance using experimental model. The results show that the system can reduce energy consumption loads by 40%. Stable operation of guaranteed below certain threshold traffic.

RF characteristics of a nanoscale MOSFET are measured and analyzed at temperatures ranging from 4.2 to 300 K for deep-space applications. This device shows 197-GHz current gain cutoff frequency (f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</sub> ) 162-GHz maximum oscillation xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> when operating liquid-helium temperature, which represent 60% 80% improvement compared room temperature...

Peak discharges during large floods can often result in submerged orifice flow (also called "pressure flow"), or embankment and bridge overtopping flow, which the abutment foundation of a are subjected to severe scour possible failure. In this study, experiments were carried out wide, laboratory compound channel investigate characteristics for three types free, orifice, weir (overtopping) an erodible but riprap-protected abutment. Detailed bed contours three-dimensional (3D) velocities...

The method of large eddy simulation (LES) was employed to investigate the flow and turbulence structure around bridge abutments different lengths placed in a compound, asymmetric channel. simulations were faithful representations large-scale physical model experiments that conducted hydraulics laboratory at Georgia Institute Technology. are considered idealized hydraulic models Towaliga River Macon, Georgia, consisting flat horizontal floodplains on both sides parabolic main channel, two...

Demand response (DR) is a key technique in smart grid (SG) technologies for reducing energy costs and maintaining the stability of electrical grids. Since manufacturing one major consumers energy, implementing DR factory management systems (FEMSs) provides an effective way to manage processes. Although previous studies have investigated applications process manufacturing, they were not conducted discrete manufacturing. In this study, state-task network (STN) model implemented represent...

Streamflow is a very important component of the hydrological cycle, and variation in streamflow can be an indication disaster. Thus, accurate quantification core concern water resources engineering. In this study, we evaluated factors influencing decomposed their effects three large rivers: Buk Han River (BHR), Nam (NHR), Lower (LHB). The Pettit test was used to investigate breakpoints conjunction with climate elasticity approach decomposition framework quantify decompose variability...

Acknowledged as a significant cause of bridge failure is abutment scour around foundations. Because the complexity flow structures and mechanisms an abutment, remains focus extensive research. In this study, to elucidate complex physics resulting sediment transport time development in three types free, submerged orifice, overtopping were examined by conducting laboratory experiments compound channel. Different lengths erodible used explore effect contraction on scour. Detailed bed contours...

Bridge pier scour is one of the main causes bridge failure and a major factor that contributes to total construction maintenance costs bridge. Recently, because unexpected high water during extreme hydrologic events, resilience security hydraulic infrastructure with respect protection measure along river reach has become more immediate topic for engineering society. Although numerous studies have been conducted suggest estimation formulas, understanding turbulence characteristics which...

Recently, the issues of scour around a bridge have become prominent because recurrent occurrence extreme weather events. Thus, must be designed with appropriate protection measures to prevent failure due for high flows which it may subjected during such However, current depth estimation by several recommended equations shows inaccurate results in flow. One possible reason is that are based on experiments using free-surface flow even though flood events can cause overtopping combination...

Abstract Sedimentation – including erosion, transport, and deposition of coarse‐grained particles is a primary growing environmental, engineering, agricultural issue around the world. Soil erosion occurs when hydrodynamic force induced by flowing water exceeds geotechnical resistance soils, as measured critical shear stress for initiation soil‐particle motion. Even though various quantitative methods have been suggested with respect to different types soil, most widely accepted formula...

Scouring around bridge piers is a highly nonlinear process making its prediction by deterministic and stochastic models challenging. This study explores the application of inferential for predictions bed elevations piers. The objective to get generalized machine learning model with an interpretable structure. historical data comprise detailed record streamflow that were captured sensors installed at 5th Street Bridge over Ocmulgee River Macon, GA. We investigate accuracy efficiency various...

This paper presents an adaptive predistortion RF power amplifier for repeater systems with a spectrum monitor. For control of cancellation, we implement monitor that improves the adjacent channel leakage ratio (ACLR) characteristics by analyzing output spectrums amplifiers directly and simultaneously. experimental validation, also class-AB adopts linearizer measure wide-band code division multiple access (WCDMA) band. With optimum gate bias voltage amplifier, ACLRs 22 20.5 dB are improved...

The Fukushima nuclear disaster highlights the importance of accurate and fast predictions tsunami hazard to critical coastal infrastructure devise mitigation strategies in both long-term real-time events. Recently, deep learning models allowed us make rapid forecasts on high dimensional, non-linear, non-stationary time series data such as that associated with waveforms. Thus, this study uses a one-dimensional convolutional neural network (CNN) model predict waveforms at cooling water intakes...

Abstract The paper presents experimental results and analysis of heat transfer in a thermally developing region round pipes for three fluids typically used as low temperature coolants, the range 0–−40°C. experiments were performed at Re (200–1000) high Pr (80–140) numbers that are found secondary refrigeration loop conditions. effect horizontal U-bend is also presented. It shown positive thermal development (high Nu number) lasts long because technically significant length region. Secondary...

Large-scale water resources systems are often managed by an integrated set of hydraulic structures that vulnerable to wider ranges discharge and tailwater elevation than envisioned in their original design due climate change additional project objectives such as fostering healthy ecosystems. The present physical model study explored the performance a spillway structure on Kissimmee River, operated South Florida Water Management District, under extreme conditions drought flooding with...

The traditional centralized logistics resources allocation method can no longer adapt to the new business model of decentralized e-commerce, requiring transaction security for all parties involved in process. Utilizing blockchain and smart contract technologies build network foundation edge computing technology assist resource-constrained transport nodes implementing complex computation, this paper proposes a distributed chain (DLRAChain) concept designs DLRAChain that supports independent...