An Assessment of Village Drill Sustainability, With Recommendations

2017 ◽  
Author(s):  
Andrew T. Pack ◽  
Christopher A. Mattson
Keyword(s):  
Rural Areas ◽  
Design Space ◽  
Three Dimensional ◽  
Decision Makers ◽  
Random Sets ◽  
Design Parameters ◽  
Water Wells ◽  
Using Data ◽  
The Village ◽  
Drill Design

Sustainability is commonly broken into three categories: economic, environmental, and social. For products, there is a need for design tools that allow decision makers to handle the tradeoffs between each of these three pillars of sustainability. This paper simultaneously assesses all three pillars of sustainability for the Village Drill, a machine used to dig water wells in rural areas around the world. Using data and methods from Mattson et al. [1, 2] relationships are developed between the drill’s design parameters and key sustainability issues. These relationships are used to evaluate the sustainability of the current drill design as well as any alternatives. One million random sets of drill parameters are generated and the resulting drill alternatives are evaluated. A three-dimensional design space for the sustainability of the drill is found and recommendations are given with potential for improvements in each pillar of sustainability.

Adaptive Geometry Representation of Turbine Vane Frames for Use in Optimization

2021 ◽  
Author(s):  
Sebastian F. Riebl ◽  
Christian Wakelam ◽  
Reinhard Niehuis
Keyword(s):  
Design Space ◽  
Cfd Simulation ◽  
A Priori ◽  
Three Dimensional ◽  
Optimization Method ◽  
Three Dimensions ◽  
Design Parameters ◽  
Adjustment Process ◽  
Turbine Vane ◽  
Integrated Concept

Abstract Turbine Vane Frames (TVF) are a way to realize more compact jet engine designs. Located between the high pressure turbine (HPT) and the low pressure turbine (LPT), they fulfill structural and aerodynamic tasks. When used as an integrated concept with splitters located between the structural load-bearing vanes, the TVF configuration contains more than one type of airfoil with sometimes pronouncedly different properties. This system of multidisciplinary demands and mixed blading poses an interesting opportunity for optimization. Within the scope of the present work, a full geometric parameterization of a TVF with splitters is presented. The parameterization is chosen as to minimize the number of parameters required to automatically and flexibly represent all blade types involved in a TVF row in all three dimensions. Typical blade design parameters are linked to the fourth order Bézier-curve controlled camber line-thickness parameterization. Based on conventional design rules, a procedure is presented, which sets the parameters within their permissible ranges according to the imposed constraints, using a proprietary developed code. The presented workflow relies on subsequent three dimensional geometry generation by transfer of the proposed parameter set to a commercially available CAD package. The interdependencies of parameters are discussed and their respective significance for the adjustment process is detailed. Furthermore, the capability of the chosen parameterization and adjustment process to rebuild an exemplary reference TVF geometry is demonstrated. The results are verified by comparing not only geometrical profile data, but also validated CFD simulation results between the rebuilt and original geometries. Measures taken to ensure the robustness of the method are highlighted and evaluated by exploring extremes in the permissible design space. Finally, the embedding of the proposed method within the framework of an automated, gradient free numerical optimization is discussed. Herein, implications of the proposed method on response surface modeling in combination with the optimization method are highlighted. The method promises to be an option for improvement of optimization efficiency in gradient free optimization of interdependent blade geometries, by a-priori excluding unsuitable blade combinations, yet keeping restrictions to the design space as limited as possible.

Performance Maps for a Bio-Inspired Robotic Condylar Hinge Joint

2014 ◽  
Vol 136 (11) ◽  
Author(s):  
Stuart C. Burgess ◽  
Appolinaire C. Etoundi
Keyword(s):  
Design Space ◽  
Three Dimensional ◽  
Design Parameters ◽  
Mean Square ◽  
Cruciate Ligaments ◽  
Range Of Movement ◽  
Mechanical Advantage ◽  
Human Knee ◽  
Hinge Joint ◽  
Human Knee Joint

This paper presents performance charts that map the design space of a bio-inspired robotic condylar hinge joint. The joint mimics the design of the human knee joint by copying the condylar surfaces of the femur and tibia and by copying the four-bar motion of the cruciate ligaments. Four aspects of performance are modeled: peak mechanical advantage, RMS (root mean square) mechanical advantage, RMS sliding ratio, and range of movement. The performance of the joint is dependent on the shape of the condylar surfaces and the geometry of the four-bar mechanism. The design space for the condylar hinge joint is large because the four-bar mechanism has a very large number of possible configurations. Also, it is not intuitive what values of design parameters give the best design. Performance graphs are presented that cover over 12,000 different geometries of the four-bar mechanism. The maps are presented on three-dimensional graphs that help designers visualize the limits of performance of the joint and visualize tradeoffs between individual aspects of performance. The maps show that each aspect of performance of the joint is very sensitive to the geometry of the four-bar mechanism. The trends in performance can be understood by analyzing the kinematics of the four-bar mechanism and the shape of the condylar surfaces.

A Virtual Reality Environment for Synthesizing Spherical Four-Bar Mechanisms

1995 ◽  
Author(s):  
Scott W. Osborn ◽  
Judy M. Vance
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Design Space ◽  
Three Dimensional ◽  
Design Parameters ◽  
Spatial Problem ◽  
Virtual Reality Environment ◽  
Spatial Design ◽  
Design Software ◽  
Logical Extension

Abstract This paper describes the development of a virtual reality environment which facilitates the design of spherical four-bar mechanisms. The virtual environment allows the user to naturally interact with the input data and specify the design parameters while operating in a three-dimensional environment. We see this development as a logical extension of existing graphics-based spatial design software. The need for a three-dimensional design space is driven by the difficulty in specifying design inputs and constraints for a spatial problem using a two-dimensional interface. In addition, once the mechanism has been created, the virtual environment provides the opportunity for the user to visually verify that the mechanism will perform the desired three-dimensional motion.

scholarly journals Diversity, Disparity and Territorial Resilience in the Context of the Economic Crisis: An Analysis of Rural Areas in Southern Spain

2019 ◽  
Vol 11 (6) ◽  
pp. 1743 ◽  
Author(s):  
Pedro Sánchez-Zamora ◽  
Rosa Gallardo-Cobos
Keyword(s):  
Economic Crisis ◽  
Rural Areas ◽  
Natural Capital ◽  
Decision Makers ◽  
Data Envelopment ◽  
Composite Indices ◽  
Development Policies ◽  
Using Data ◽  
Programming Period ◽  
The Impact

This paper analyses territorial resilience in rural Andalusia, Spain, after the impact of the recent economic crisis and identifies the factors associated with the highest recovery rates in different contexts and territories. To this end, we developed a methodology that incorporates the heterogeneity and diversity of rural territories and uses composite indices calculated using Data Envelopment Analysis (DEA) in order to measure levels of resilience and identify the factors that impact recovery in rural counties. The results reveal how different aspects of economic, social, human, and natural capital promote resilient territorial dynamics in rural Andalusia. These results provide useful information for political decision-makers in the design of public policies, especially at a time like the present when the EU is immersed in debate on the reform of rural development policies for the next programming period beyond 2020.

KEBANGGAAN TERHADAP BATIK MADURA BAGI WARGA SUMENEP

2014 ◽  
Vol 4 (2) ◽  
Author(s):  
Sayyida Sayyida ◽  
Nurdody Zakki
Keyword(s):  
Logistic Regression ◽  
Rural Areas ◽  
Research Method ◽  
Community Group ◽  
Parametric Regression ◽  
Logit Function ◽  
The Village ◽  
The City ◽  
Level Of Risk ◽  
Non Parametric

Diversity of Indonesian Batik hanging area. One of the very well-known Indonesian batik is Batik Madura. Batik Madura has become a pride for Indonesia, especially for Madura. The purpose of the study is to model the Sumenep pride to Batik Madura and to see the level of risk or tendency of batik madura pride for the community group Sumenep. This research method uses a non parametric regression used a non-parametric regression because the dependent variable in this study is the variable Y are variables not normally distributed. The results of this study states that the level of risk of the village in Sumenep proud of batik is almost 5 times higher than the islands while people in this city who live in the district town at risk Sumenep proud of Batik Madura 8-fold compared to the archipelago. So it can be concluded that the city is much more proud of batik than those who reside in rural areas especially those who reside in the islands. This study uses data from 100 questionnaires were analyzed using logistic regression analysis. The conclusion of this study is the pride of the batik model as follows: Function logistic regression / logit function: g (x) = 0,074 + 1,568X4(1)+2,159X4(2 this is case the islands as a comparison, X4(1)  is the place to stay in the village and X4(2)  is the place to stay in town, so the Model Opportunities p(x) = EXP(g(x))/1+EXP(g(x)).  Hopes for further research is to conduct research on the development of batik in an integrated region, the need to be disseminated to potential areas of particular potential in Madura batik, especially for residents who reside in the Islands.Keywords: Pride, Batik, Sumenep.

RURAL MEDICINE. CONDITION AND ISSUES

2020 ◽  
pp. 103-110
Author(s):  
Yuliya M. Beglyakova ◽  
◽  
Aleksander S. Shchirskii ◽  
Keyword(s):  
Health Services ◽  
Medical Care ◽  
Rural Areas ◽  
Rural Population ◽  
Rural Medicine ◽  
Self Medication ◽  
Medical Facilities ◽  
Treatment Facilities ◽  
Number Of Treatment ◽  
The Village

The article analyses the accessibility of medical facilities in rural areas of modern Russia and the specifics of their organization and development. The authors reveal causes why rural residents have much less opportunities to seek quality medical care than urban ones, what leads to a disparity between the inhabitants of the city and the village. The thesis is substantiated that state programmes that should make health services accessible to the rural population to a greater extent do not cope with the task at hand. An attempt is made to highlight the public’s response to the existing disparity in the health services of the villagers compared to urban dwellers. Such a reaction can be considered an outflow of people from rural areas, and an increase in self-medication among rural people as a result of the difficulty in obtaining health services. The decrease in the number of treatment facilities in rural areas leads to a deterioration in the medicine situation in rural areas. That, according to the authors of the article, justifies the need to study the issues associated with the provision of medical care to the rural population.

Asistensi Pendirian Badan Usaha Milik Desa Cibogo, Kecamatan Cisauk, Kabupaten Tangerang

2018 ◽  
Vol 1 ◽  
pp. 350
Author(s):  
Taufik Raharjo ◽  
Ambang Aries Yudanto ◽  
I Gede Agus Ariutama
Keyword(s):  
Rural Development ◽  
Rural Areas ◽  
Group Discussion ◽  
National Development ◽  
Qualitative Approach ◽  
Government Support ◽  
Outer Ring ◽  
Indonesian Government ◽  
The Village

As the Indonesian government has been committed, that the national development should be puting more focus from the outer-ring or rural areas. One of the instrument to boost the rural development is Village Fund. This decentralization transfer purposively targets to improve the village society’s welfare and alleviate social gap existed among societies. Village-owned enterprise (Badan Usaha Milik Desa or BUMDes) is provided as one of the strategic mechanism to create the welfare by proactively engage the community itsefl. In fact, BUMDes may incorporate Village Fund as capital alternative to support their establishment. This paper highlights the crucial factors in order to establish a village-owned enterprise (BUMDes) in case of Cibogo Village, Cisauk Sub-regency, Tangerang Regency. The study deploys a qualitative approach. To collect the data, we are scouting, interviewing and establishing Focused-Group Discussion that involving the possible parties which may contributes in creating BUMDes. The result has not yet concluded as the process of the research still going on. We predicts that the communities engagement, empowerment and also government support should be taken into account in the early process of establishing BUMDes. Eventually, proactive society’s control and participatory would be decent factors to support the operations of BUMDes itself.

Design and optimization of bump (compression surface) for diverterless supersonic inlet

2021 ◽  
pp. 095441002110029
Author(s):  
Irsalan Arif ◽  
Hassan Iftikhar ◽  
Ali Javed
Keyword(s):  
Fitness Function ◽  
Supersonic Jet ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Least Square ◽  
Pressure Recovery ◽  
Design Parameters ◽  
Inlet System ◽  
Design And Optimization ◽  
Supersonic Inlet

In this article design and optimization scheme of a three-dimensional bump surface for a supersonic aircraft is presented. A baseline bump and inlet duct with forward cowl lip is initially modeled in accordance with an existing bump configuration on a supersonic jet aircraft. Various design parameters for bump surface of diverterless supersonic inlet systems are identified, and design space is established using sensitivity analysis to identify the uncertainty associated with each design parameter by the one-factor-at-a-time approach. Subsequently, the designed configurations are selected by performing a three-level design of experiments using the Box–Behnken method and the numerical simulations. Surrogate modeling is carried out by the least square regression method to identify the fitness function, and optimization is performed using genetic algorithm based on pressure recovery as the objective function. The resultant optimized bump configuration demonstrates significant improvement in pressure recovery and flow characteristics as compared to baseline configuration at both supersonic and subsonic flow conditions and at design and off-design conditions. The proposed design and optimization methodology can be applied for optimizing the bump surface design of any diverterless supersonic inlet system for maximizing the intake performance.

scholarly journals Research on the Computed Tomography Pebble Flow Detecting System for HTR-PM

2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Xin Wan ◽  
Ximing Liu ◽  
Jichen Miao ◽  
Peng Cong ◽  
Yuai Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Helical Ct ◽  
Design Parameters ◽  
Three Dimensional Model ◽  
Safe Operation ◽  
Cross Sectional ◽  
Ct System ◽  
Near Future ◽  
Pebble Flow

Pebble dynamics is important for the safe operation of pebble-bed high temperature gas-cooled reactors and is a complicated problem of great concern. To investigate it more authentically, a computed tomography pebble flow detecting (CT-PFD) system has been constructed, in which a three-dimensional model is simulated according to the ratio of 1 : 5 with the core of HTR-PM. A multislice helical CT is utilized to acquire the reconstructed cross-sectional images of simulated pebbles, among which special tracer pebbles are designed to indicate pebble flow. Tracer pebbles can be recognized from many other background pebbles because of their heavy kernels that can be resolved in CT images. The detecting principle and design parameters of the system were demonstrated by a verification experiment on an existing CT system in this paper. Algorithms to automatically locate the three-dimensional coordinates of tracer pebbles and to rebuild the trajectory of each tracer pebble were presented and verified. The proposed pebble-detecting and tracking technique described in this paper will be implemented in the near future.

scholarly journals Reliability Evaluation of Fan-Out Type 3D Packaging-On-Packaging

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 295
Author(s):  
Pao-Hsiung Wang ◽  
Yu-Wei Huang ◽  
Kuo-Ning Chiang
Keyword(s):  
Finite Element ◽  
Thermal Cycling ◽  
Glass Substrate ◽  
High Speed ◽  
Coefficient Of Thermal Expansion ◽  
Three Dimensional ◽  
Design Parameters ◽  
Time To Failure ◽  
Wafer Level ◽  
Fine Pitch

The development of fan-out packaging technology for fine-pitch and high-pin-count applications is a hot topic in semiconductor research. To reduce the package footprint and improve system performance, many applications have adopted packaging-on-packaging (PoP) architecture. Given its inherent characteristics, glass is a good material for high-speed transmission applications. Therefore, this study proposes a fan-out wafer-level packaging (FO-WLP) with glass substrate-type PoP. The reliability life of the proposed FO-WLP was evaluated under thermal cycling conditions through finite element simulations and empirical calculations. Considering the simulation processing time and consistency with the experimentally obtained mean time to failure (MTTF) of the packaging, both two- and three-dimensional finite element models were developed with appropriate mechanical theories, and were verified to have similar MTTFs. Next, the FO-WLP structure was optimized by simulating various design parameters. The coefficient of thermal expansion of the glass substrate exerted the strongest effect on the reliability life under thermal cycling loading. In addition, the upper and lower pad thicknesses and the buffer layer thickness significantly affected the reliability life of both the FO-WLP and the FO-WLP-type PoP.

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