Design, Development and Realisation of an Active Driven Knee-Prosthesis with Bevel Helical Gearbox

2014 ◽  
Vol 907 ◽  
pp. 225-239
Author(s):  
Bernhard Budaker ◽  
Alexander Verl
Keyword(s):  
Development Process ◽  
Knee Prosthesis ◽  
Scientific Work ◽  
Design Development ◽  
Knee Prostheses ◽  
Technical Parameters ◽  
Gait Parameters ◽  
Essential Components ◽  
Transfemoral Amputees ◽  
The Right

This paper presents the development of an active driven prosthesis for transfemoral amputees. At the beginning of the development process gait parameters are analyzed. Defined boundary conditions help to get the right technical parameters for a structured development process. During the following development process, different concepts for active driven knee prostheses are discussed. Essential components for active driven prosthesis systems are presented. The focus during the scientific work is the development of an active drive system for an active driven knee prosthesis. A first prototype of an active driven knee prosthesis is shown.

scholarly journals Analysis of Urban Transformation Through the Use of Expanded Research Tools

SAGE Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 215824402110383
Author(s):  
Ana Elena Builes-Vélez ◽  
Lina María Suárez Velásquez ◽  
Leonardo Correa Velásquez ◽  
Diana Carolina Gutiérrez Aristizábal
Keyword(s):  
Latin American ◽  
Urban Studies ◽  
Development Process ◽  
Urban Transformation ◽  
Urban Spaces ◽  
Design Development ◽  
New Methods ◽  
The Social ◽  
American Cities ◽  
Research Tools

In recent years, urban design development has been an important topic in Latin American cities such as Medellín due to the transformation of their urban spaces, along with the new methods used to evaluate the social, morphological, and, in some cases, economic impacts that have been brought about by the urban development projects. When inquiring about the development process and impact of urban studies, and the inhabitants’ relation to a transformed space, it is important to establish the context within which images, drawings, and photographs are analyzed, using graphical approaches triangulated with other research methods to define comparative criteria. In this article, we reflect on the expanded use of various research tools for the analysis of urban transformation, taking with reference the experience lived by a group of researchers in two Latin American cities. From this, it is intended to understand how they work and how they allow us to understand the urban transformation of these cities, the data obtained, and the vision of the researchers.

scholarly journals From GPS Receiver to GNSS Reflectometry Payload Development for the Triton Satellite Mission

2021 ◽  
Vol 13 (5) ◽  
pp. 999
Author(s):  
Yung-Fu Tsai ◽  
Wen-Hao Yeh ◽  
Jyh-Ching Juang ◽  
Dian-Syuan Yang ◽  
Chen-Tsung Lin
Keyword(s):  
Satellite System ◽  
Low Earth Orbit ◽  
Export Control ◽  
Navigation Systems ◽  
Gps Receiver ◽  
Design Development ◽  
Satellite Mission ◽  
Essential Components ◽  
Gnss Reflectometry ◽  
Global Navigation Satellite

The global positioning system (GPS) receiver has been one of the most important navigation systems for more than two decades. Although the GPS system was originally designed for near-Earth navigation, currently it is widely used in highly dynamic environments (such as low Earth orbit (LEO)). A space-capable GPS receiver (GPSR) is capable of providing timing and navigation information for spacecraft to determine the orbit and synchronize the onboard timing; therefore, it is one of the essential components of modern spacecraft. However, a space-grade GPSR is technology-sensitive and under export control. In order to overcome export control, the National Space Organization (NSPO) in Taiwan completed the development of a self-reliant space-grade GPSR in 2014. The NSPO GPSR, built in-house, has passed its qualification tests and is ready to fly onboard the Triton satellite. In addition to providing navigation, the GPS/global navigation satellite system (GNSS) is facilitated to many remote sensing missions, such as GNSS radio occultation (GNSS-RO) and GNSS reflectometry (GNSS-R). Based on the design of the NSPO GPSR, the NSPO is actively engaged in the development of the Triton program (a GNSS reflectometry mission). In a GNSS-R mission, the reflected signals are processed to form delay Doppler maps (DDMs) so that various properties (including ocean surface roughness, vegetation, soil moisture, and so on) can be retrieved. This paper describes not only the development of the NSPO GPSR but also the design, development, and special features of the Triton’s GNSS-R mission. Moreover, in order to verify the NSPO GNSS-R receiver, ground/flight tests are deemed essential. Then, data analyses of the airborne GNSS-R tests are presented in this paper.

STATE AND PROSPECTS OF FOREIGN LANGUAGE EDUCATION IN KAZAKHSTAN: EXPERIENCE OF EMPIRICAL STUDY

2021 ◽  
Vol 66 (2) ◽  
pp. 74-83
Author(s):  
A. Ye. Bizhkenova ◽  
◽  
D.M. Kabenova ◽  
Z.S. Takuova ◽  
M. Adilkhanuly ◽  
...  
Keyword(s):  
Foreign Language ◽  
Language Education ◽  
Scientific Work ◽  
Foreign Language Education ◽  
Educational Process ◽  
Preschool Age ◽  
English Classes ◽  
Language Communication ◽  
Eighth Grade Students ◽  
The Right

In the system of foreign language education in Kazakhstan,English is a priority at all levels of education. English is the language which is chosen by parents as a foreign for their children in preschool age. This article is devoted to the study of the status and current issues of teaching English in Kazakhstan. It is based on the results of a practical survey of eighth grade students of some secondary schools, as well as on observation of the educational process. During a visit to English classes and after conversations with school teachers, the problematic aspects of the learning process were identified. The article provides an overview of modern methods and principles of classes’ organization, contains recommendations for solving theidentified problems. The authors of the article also tried to find out the desire of students to learn not only English, but also other foreign languages, because according to the state regulatory documents, students at school have the right to choose a foreign language, which they want tolearn. The desire to communicate in a foreign language, readiness for foreign language communication, the role ofEnglish language in the student’s life, the main activities in foreign language lessons were some of the key issues, that were considered in this scientific work.

Influence of Cyclic Loading on Mechanical Loosening of Hinged Knee Prostheses

1978 ◽  
Vol 7 (4) ◽  
pp. 235-239 ◽  
Author(s):  
D. H. van Campen ◽  
H. W. Croon ◽  
J. Lindwer
Keyword(s):  
Experimental Investigation ◽  
Cyclic Loading ◽  
Mechanical Loading ◽  
Knee Prosthesis ◽  
In Vitro Experiments ◽  
Knee Prostheses ◽  
Normal Walking ◽  
Fresh Cadaver ◽  
Unfavourable Effect

A combined theoretical and experimental investigation is reported with respect to the influence of mechanical loading on loosening at the cement bone interface of knee prostheses with intermedullary stems. The in vitro experiments have been performed under cyclic loading conditions with the tibial part of a Shiers knee prosthesis implanted in fresh cadaver tibiae. The experimental results indicate an unfavourable effect of peak loading (as occurring in walking up stairs) on loosening as compared with loading due to normal walking conditions.

scholarly journals Design and evaluation of a hybrid passive–active knee prosthesis on energy consumption

2020 ◽  
Vol 11 (2) ◽  
pp. 425-436
Author(s):  
Xiaoming Wang ◽  
Qiaoling Meng ◽  
Zhewen Zhang ◽  
Jinyue Sun ◽  
Jie Yang ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Knee Prosthesis ◽  
Metabolic Cost ◽  
Knee Prostheses ◽  
Hydraulic Damper ◽  
Operating Modes ◽  
Gait Characteristics ◽  
Energy Consumption Model ◽  
Active Motor ◽  
Damping Torque

Abstract. The existing lower limb prostheses with passive knees have disadvantages, causing an asymmetric gait and higher metabolic cost during level walking which is in contrast with a normal gait. However, most existing active knee prostheses need a significant amount of energy. In this paper, a novel hybrid passive–active knee prosthesis (HPAK) that allows passive and active operating modes is proposed, which contains an active motor unit and a novel hydraulic damper with an electrically controlled valve that adjusts the damping torque dynamically during each gait cycle. An energy consumption model was built to evaluate the energy consumption when walking on level ground in three different simulation conditions to, respectively, simulate the complete HPAK, an ordinary active prosthesis (AKP) and an ordinary passive prosthesis (PKP). The results show that, in a cycle, the HPAK consumes only 16.19 J, which is 3.6 times lower than the AKP (58.95 J), and the PKP consumes only 1.24 J due to the novel spring–hydraulic damper structure designed and presented in this paper. These results indicate that the proposed novel hybrid passive–active knee prosthesis can have a positive effect on reducing energy consumption and improving the approximation of healthy gait characteristics when walking on level ground, contrasting with active or passive knee prostheses.

scholarly journals PENGEMBANGAN LEMBAR KERJA SISWA (LKS) BAHASA INDONESIA KELAS VII DENGAN MODEL PEMBELAJARAN BERBASIS MASALAH

EDU-KATA ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 145-152
Author(s):  
Sri Rahayu
Keyword(s):  
Data Analysis ◽  
Product Quality ◽  
Development Process ◽  
Problem Based Learning ◽  
Learning Model ◽  
Design Development ◽  
Student Work ◽  
Two Stages ◽  
D Model

The research aimed to (1) describe the process of developing the Indonesian Student Workheet using Problem Based Learning Model, (2) show the quality of the Indonesian Student Work Sheet using Problem Based Learning Model, including: (a) the product quality of the Student Worksheet and (b) the using quality of the Student Worksheet. The type of the research was research and development using 4-D model, those are definition, design, development, and dissemination. The data collection used instrument of validation sheet from the expert, questionnaire sheet, observation sheet. The technique of data analysis divided into three, the technique of data analysis of student worksheet quality and the implementation of student work sheet using Problem Based Learning. The results showed that the development process consisted of two stages: (1) the analysis phase of the writer’s understanding about the Student Worksheet and it’s need, and (2) the design phase which produced the summaries of the materials in each basic competences. The product quality based on the expert gained the score in average of 72.48%, good, the using quality based on the questionnaires to the teacher and observation to the students gained the score in average of 75, 65, good.

scholarly journals An integrated platform for intuitive mathematical programming modeling using LaTeX

2018 ◽  
Vol 4 ◽  
pp. e161 ◽  
Author(s):  
Charalampos P. Triantafyllidis ◽  
Lazaros G. Papageorgiou
Keyword(s):  
Mathematical Programming ◽  
Error Detection ◽  
Development Process ◽  
Optimization Problems ◽  
Scientific Work ◽  
Input Language ◽  
Speed Up ◽  
Cross Platform ◽  
Algebraic Modeling Language ◽  
Friendly Graphical User Interface

This paper presents a novel prototype platform that uses the same LaTeX mark-up language, commonly used to typeset mathematical content, as an input language for modeling optimization problems of various classes. The platform converts the LaTeX model into a formal Algebraic Modeling Language (AML) representation based on Pyomo through a parsing engine written in Python and solves by either via NEOS server or locally installed solvers, using a friendly Graphical User Interface (GUI). The distinct advantages of our approach can be summarized in (i) simplification and speed-up of the model design and development process (ii) non-commercial character (iii) cross-platform support (iv) easier typo and logic error detection in the description of the models and (v) minimization of working knowledge of programming and AMLs to perform mathematical programming modeling. Overall, this is a presentation of a complete workable scheme on using LaTeX for mathematical programming modeling which assists in furthering our ability to reproduce and replicate scientific work.

scholarly journals Audiobooks como ferramenta pedagógica na educação inclusiva de deficientes visuais

2016 ◽  
Vol 20 (1) ◽  
pp. 254
Author(s):  
Maritê De Oliveira ◽  
Liziany Muller Medeiros ◽  
Ana Cristina da Fonseca Ziegler ◽  
Andreia Lucimar Silva de Lima ◽  
Juliana Santos da Silva
Keyword(s):  
Visually Impaired ◽  
Regular Education ◽  
Development Process ◽  
Study Group ◽  
Rio Grande Do Sul ◽  
Regular School ◽  
Construction Of Knowledge ◽  
Visually Impaired Students ◽  
Children's Stories ◽  
The Right

The school inclusion involves much more than the right to a place in an institution of regular education. It encompasses the right of the student to rely on various pedagogical alternatives, according to their specific characteristics to help in the teachinglearning process and become subject in the construction of knowledge. Thinking about the difficulties of visually impaired students being included in the regular school and as data gathered through research, it was found restricted access to literary wo rks to the visually impaired. Thus students of the Curso Técnico em Publicidade from the Instituto Estadual de Educação Visconde de Cairu, Santa Rosa, Rio Grande do Sul, formed a study group in order to find alternatives to fill this gap. Came the idea of developing talking books from the tales and children's stories and thus was born Audiobooks Project. Throughout the project, notes, fiel d diaries were being made and were being collected materials so that each step was documented. This study discusses the development process Audiobooks Project, from its initial conception to distribution of materials to schools in the area. It is expected to provid e support for similar projects that are produced or that new pedagogical alternatives are designed, benefiting all special students and contributing to the construction of knowledge and effective citizenship.

scholarly journals MAKNA HIDUP DALAM KASIH MENURUT RASUL PAULUS BERDASARKAN ROMA 12:9-21

1970 ◽  
Vol 3 (2) ◽  
pp. 157-175
Author(s):  
Estherlina Maria Ayawaila
Keyword(s):  
Meaning Of Life ◽  
Scientific Work ◽  
Practical Application ◽  
Apostle Paul ◽  
Correct Method ◽  
The Right ◽  
The Church

Romans are letters written by the Apostle Paul addressed to the church in Rome. One of the purposes of this letter is that in conveying love you have the correct method so that love can be done. The duty of believers is to convey love to those who have not done love like the Lord Jesus did. Problems to love can arise from a lack of understanding about love, understanding but not doing or starting to degrade the meaning of love in believers. Therefore this paper tries to remind again about the warmth of love for believers. In writing this scientific work the writer will explore how the meaning of life in love according to the Apostle Paul based on Romans 12: 9-21. To deepen the study of the writer uses the writing method which looks at the meaning of the right life in doing love especially in Romans 12: 9-21. So that this scientific work is easy to understand at the end, write a practical application in loving.

scholarly journals Analysis of the performance of the brazilian intellectual property system: challenges and perspectives

2018 ◽  
Vol 18 (2) ◽  
pp. 172-199 ◽  
Author(s):  
Cleiton Rodrigues de Vasconcelos ◽  
Daniel Pereira da Silva
Keyword(s):  
Intellectual Property ◽  
Computer Program ◽  
Management System ◽  
Development Process ◽  
Industrial Design ◽  
Methodological Approach ◽  
Geographical Indication ◽  
The Public ◽  
Property System ◽  
The Right

The protection of intellectual property (IP) is a crucial area to support the development process of any country, as it is in this context that the biggest strategic disputes are taking place. In recent years Brazil has developed some actions to achieve greater efficiency in the public IP management system, but are we on the right track? The present study seeks to present answers regarding the performance of Brazil and to highlight the advances and challenges regarding the IP system. The methodological approach was structured based on a review in the literature, highlighting the scientific, economic and technological indicators on the development of IP and the main IP objects registered with the Brazilian national intellectual property body (INPI) in the period of 2013 to 2016, in the areas of patents, trademarks, industrial design, computer program, circuit topography, technology contracts and geographical indication.

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