NUMERICAL ANALYSIS OF CO-FLOWING IMMISCIBLE LIQUIDS IN CO-AXIAL MICROTUBES

This research developed dimensionless correlations, based on the numerical simulations, for the boundaries between the dripping, transition and jetting regimes. Additional correlations are also developed for the radius and formation frequency of disperse droplet in the dripping regime and the transition regime, when the total volume of the satellite droplets is less than 1% of the disperse primary droplets

The CAID Information System

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GOES-next navigation operations

The next generation of Geostationary Operational Environmental Satellites, GOES-I through -M (hereafter referred to as GOES-Next), begins a new era in the operation of weather satellites by the National Oceanic and Atmospheric Administration (NOAA). With a new spacecraft design, three-axis attitude stabilization, new ground support equipment, and improved methods of image navigation and registration that use on board compensation techniques to correct images for satellite motion, NOAA expects improved performance over the current series of dual-spin spacecraft. To meet these expectations, planning is currently underway for providing the complex and intensive operational environment that will meet the challenge of operating the GOES-Next spacecraft. This paper describes that operational environment

Aniseikonia lens design by Wick\u27s approach: Programmed by Apple BASIC

Aniseikonia lens design by Wick\u27s approach: Programmed by Apple BASI

Decision Supporting Methodology and System Based on Theory of Constraints for Making an Optimal Product Portfolio Strategy in Shipbuilding Industry

Shipbuilding is a typical ‘build to order’ industry. It has a business model that generates revenues from building various ships and offshore products in accordance with owner’s requirements at each production stage. Under uncertainty in shipping market, it is very essential for the shipbuilder to prepare the fast and competitive decision for product portfolio strategy in order to maximize contribution margin by exploiting production facilities and constraints. TOC(theory of constrains) proposed by Dr. goldratt in 1979 has been evolved into a management philosophy with practices and principles spanning a multitude of operations management sub-disciplines.[1] In this study, we introduce the unique decision supporting methodology for the optimal product portfolio sets based on TOC. This methodology is established by adopting the concept of Drum Buffer Rope (DBR)[2] in constraints planning and Throughput Account (TA)[3][4][5] in management accounting of TOC. In addition, Decision Supporting System (DSS)[6] is implemented by applying this methodology. This DSS system provides a throughput estimator with reflecting the cost structure of shipbuilding industry and a resource simulator built on heuristic algorithms to operate major constraint-resources in shipyard such as dock, quay and pre-erection area etc. Several examples are presented to show that the proposed methodology and system can effectively support the strategic decision-making process of a global shipbuilding company

A Particle Dispersion Model For Analysis Of Two-Dimensional Mixing In Open Channels

Pollutant mixing in natural rivers is analyzed by using the two-dimensional depth-averaged advection-dispersion model (2D ADE) for rapid completion of the vertical mixing. The dispersion term in the 2D ADE follows Taylor’s assumption (Taylor, 1954; Fischer et al., 1979) which can be applied in the Taylor period. However, most open channel flow has long initial period which makes the skewed concentration distribution due to the unbalance between the shear flow advection and the vertical mixing (Chatwin, 1970). Therefore, the non-Fickian dispersion model is necessary to compensate the limitations of the 2D ADE model. In this research, the two-dimensional particle dispersion model (2D PDM) was developed to analyze the pollutant mixing both in the initial and the Taylor period without determination of the dispersion coefficient. In the 2D PDM, pollutant particles were introduced to visualize physical mixing process according to the complicate flow variation in open channels. The 2D PDM is based on the shear flow dispersion theory and adopted the operator split method which divides the shear advection stage and the turbulent diffusion stage. In the shear advection stage, particles were separated by the vertical velocity deviations in the longitudinal and transverse directions. The separated particles according to the shear flow were mixed across the vertical in the turbulent diffusion stage. After the particle mixing, the particle distribution in each time step was converted to the concentration field for various analysis. The 2D PDM was applied to the straight channel and the meandering channel for analysis of the conservative pollutant mixing. In the straight channel, concentration curves from the 2D PDM showed skewed distribution in the initial period and then turned into the Gaussian distribution in the Taylor period. And, the concentration distributions in the meandering channel showed good agreement with the tracer test results

The Role of Preaching in Church Growth

The purpose of this dissertation is to illuminate the role of biblical preaching in church growth and change, and to understand how to better facilitate growth and change in Korean Protestant Churches. The association between preaching and church growth was investigated and delineated based on literature reviews, on the studies and sermon collections of Dong-won Lee, senior pastor of Global Mission Church, and on the questionnaire survey from members of GMC. I would like this study to contribute to the restoration of biblical preaching, church growth, and church transition in cell church ministry within Korean Protestant Churches

A Study on the Influence of Seasonal Feast Ministries on the Church Growth: The Case of Seoul Shindo Church

The purpose of this study is to suggest an alternative method for church growth based on the seasonal feast ministry. The Korean church experienced a quantitative revival unprecedented in the world. Recently, however, the reality is that many Korean churches lost their lively dynamics as they failed to strive to meet, and consequently their members gradually decreased. In this context, the researcher emphasizes the importance of feast ministries as an alternative method for church growth, based on the idea that feasts found in the Bible were days that gathered people. For this, the researcher will investigate feasts found in the Bible and in the history of church and look into the results of church growth achieved by feast ministries within the Korean church. Further, the results of growth will be investigated, using data from a questionnaire survey of lay people and pastors about feast ministries carried out by the researcher in person. This paper intends to suggest a feast ministry-based alternative method for restoring church growth and creating healthy churches among churches experiencing growth slowdown

An Economic Analysis of Watershed Practices: Impact of Grazing on Watershed

A theoretical analysis for estimating the social cost and benefits associated with the impact of grazing on rangeland watersheds has been made in this study. A dynamic maximization model is used to derive an optimal utilization of forage by grazing, where forage utilization is treated as a decision variable and the hydrologic outputs of water and sediment are considered as a possible impact resulting from grazing. A modeling approach to predict the quantities of water runoff and sediment yield from watersheds was employed. A water balance equation and a curve number procedure were used to predict water runoff. For the prediction of soil loss and sediment yields, the Universal Soil Loss Equation (USLE) and the Modified Universal Soil Loss Equation (MUSLE) were utilized. This modeling approach makes it possible to simulate long-term impact of grazing on livestock production, water runoff, and erosion. To integrate these predictions on physical quantities of erosion and runoff into an economic framework, procedures for an economic valuation have been explored and presented. This theoretical analysis deals with the problems associated with watershed practices. It attempts to bridge the gap between the physically based studies and economic analysis. It provides a comprehensive analytic framework to evaluate policy decisions on publicly administered range lands. This analysis could be used to determine the optimal rate of the use of rangeland watersheds by domestic livestock. Empirical analysis has been undertaken as an application of the methodology outlined in the theoretical analysis. It utilized the outputs generated from a simulation (SPUR) model . The outputs from the simulation with the SPUR hydrology model include water runoff, sediment yields, and livestock gains. These outputs have provided the bas is for a with versus without analysis common to all cost-benefit analysis. The analysis showed that grazing in a selected area for 50 years yielded a benefit-cost ratio of 1.07. The results of this analysis demonstrated that grazing on rangeland watershed was economically justified even when the impacts of grazing on the watershed were taken into account