Miracle-dz/UniFAR-FTUs huggingface dataset:
VALIDATION OF A PORTABLE FORCE PLATE TO ASSESSING JUMPING AND LANDING PERFORMANCE

Jumping and landing tasks are commonly used! to examine various parameters regarding performance (Arampatziz et al. 2001) and injury (Hewitt et al. 2005). Traditionally jumping tasks have been used to measure a variety of neuromuscular factors regarding performance. Landings have been studied extensively with r~$pect to factors related to injury. It is commonly accepted that the standard force platform is the most commonly used and considered the 'gold standard' for measuring ground reaction force during jumping and landing tasks. One potential aspect which limits the use of a force platform is that they are typically mounted to the ground to prevent any unrelated vibrations from affecting the force measurement. The portability of these devices is difficult and measurements are normally restricted to a laboratory setting. Another possible factor that could affect the data collected by a portable force plate is the difference in surface height between the ground and the force plate. Therefore, the dimensions of a portable force platform should be large enough to accommodate the given maneuver without changes in performance. Therefore, the purpose of this study was to validate the force measurements of a new portable force platform during two jumping/landing tasks by comparing the measurements to a traditional laboratory mounted force platform. A secondary purpose was to establish the reliability of the portable force platform. If the validity and reliability of the portable force platform are confirmed, this will provide a device that can assess a variety of measurements in field (non laboratory) situations. We hypothesize that the force and temporal measurements between the two instruments would not be different.
Analysis of a Fin Drag Force in a Biomimetic Underwater Vehicle

DOI 10.17818/NM/2020/3.2 UDK 629 532/533 Original scientifi c paper / Izvorni znanstveni rad Paper accepted / Rukopis primljen: 15. 4. 2020. Pawel Piskur Polish Naval Academy Gdynia, Poland E-mail: p.piskur@amw.gdynia. pl Piotr Szymak Polish Naval Academy Gdynia, Poland E-mail: p.szymak@amw.gdynia. pl Leszek Flis Polish Naval Academy Gdynia, Poland E-mail: l.fl is@amw.gdynia. pl Joanna Sznajder Polish Naval Academy Gdynia, Poland E-mail: j.sznajder}@amw.gdynia. pl
Decentralized model reference adaptive autopilot for underwater robot

An application of a model reference adaptive control algorithm, with the parameter adaptation has been considered. A nonlinear model with unknown nonlinearities describes the robot dynamics. Command signals are generated by an adaptive autopilot. All the signals are guaranteed to be bounded and the object state is proven to converge to a small neighborhood of the reference model state. To reduce a computational complexity, the autopilot is broken down into three subsystems, each with their own controller. The control performance of the closed-loop system is guaranteed by suitably choosing the design parameters. Quality of control is tested without and in a presence of environmental disturbances. Some simulation results are inserted to show the effectiveness of the approach.
Adsorption as a waste management strategy

Adsorption is a well-known process for removing an undesired component from a fluid stream and, in the specific case of chemisorption, chemically attaching it to the surface of a solid sorbent. The process is equilibrium based, and thus relatively quick. Because of its simplicity, it has a long history in waste management, with the first reference apparently appearing in 1881 in which gases were adsorbed onto charcoal [1]. The adsorption process can be modeled using an equilibrium isotherm, a mathematical description of the amount of material accumulating on the solid surface relative to the amount in the fluid phase. Two classical models are typically used. Langmuir developed a model for gas adsorption assuming equivalent surface sites and monolayer accumulation [2], leading to an expression relating the fractional coverage (θ) to the partial pressure (pi) of the component in the vapor phase:
The strategic linkage between organizational context and information systems success: A study on the Malaysian MSC status companies

In the modem world, and because the organizational forms are changing, there is a need for a deeper investigation on the linkage between organization context and information system in the organization. The statement that the information system did not fit the organizational culture is often part of the explanation of why particular information system encountered unanticipated resistance and never met expectations. This study aims to provide a fundamental framework for a new concept of the linkage between organizational context and information systems success. This study explores the concept of organizational context dimensions suggested by Ghoshal and Bartlett (1994), stretch, trust, support and discipline, as the shapers of organizational culture, and relates them to the information systems research, focusing on the information systems success as represented by system performance, information effectiveness and service performance, particularly investigating the role of the managerial action affecting this linkage. To investigate this problem, the study first develops instrument to measure the organizational context constructs, validates them and then uses partial least squares (PLS) techniques to test the hypothesized model. Data used for this research was collected from a sample of 317 MSC status companies in Malaysia. The results show good support for the theorized model. Except trust, the organizational context is proven to be major factor for the success of information systems in the organization, especially when the organizational act ambidextrously within the information systems context. The study ends by introducing a four-stage sociotechnical model coined as System Behavioral Success Model (SBS), which describes how the behavioral context of an IT organization led by their IT executives would lead to the success of the information systems function.
Electromagnetics Comes Through in the Clutch BorgWarner engineers meet a tight deadline in optimizing the design of a revolutionary variable-torque clutch for all-wheel-drive vehicles.

All-wheel automotive drive systems have evolved dramatically, becoming increasingly popular in an expanding range of vehicles. The technology began several years ago with relatively simple devices that would positively engage and disengage a vehicle’s secondary axle with the main transmission and driveline. Systems are now more complex, with sophisticated controllers that continuously monitor vehicle conditions and actively adjust driveline torque balance to enhance vehicle stability and handling. These systems are also integrated seamlessly with the operation of the engine, transmission, anti-lock brakes and a myriad of other vehicle powertrain and safety subsystems. One of the most recent advances in all-wheel-drive systems has been made by BorgWarner TorqTransfer Systems (TTS) — a leading global designer and producer of transfer cases and torque management devices for allwheel-drive passenger cars, crossover vehicles, sport-utility vehicles and light trucks. The company recently developed the electromagnetically actuated NexTracTM active all-wheel-drive system, which provides a slipping connection with varying levels of torque transmission between the front-wheeldrive transmission and rear axle. BorgWarner TTS engineers initially attracted customer interest in NexTrac with concept-level hardware. The challenge then was to provide a set of production prototypes for a customer vehicle in three months. This required re-engineering and optimizing the device’s electromagnetic solenoid actuator, assuring reliability and proper function for a wide range of operating environments. In parallel, engineers had to provide guidance for the design, tooling and validation of the manufacturing processes. Using electromagnetic capabilities in ANSYS Multiphysics software, engineers were able to achieve these goals, quickly evaluating design alternatives, optimizing device operation through simulation, and studying the impact of different material properties,
Virtual Surgical Planning and Pre-operative Simulation for Maxillofacial Reconstruction with 3D Printing Technology in Tumor-affected Facial Deformity

BackgroundThe high anatomical complexity of maxillofacial defects caused by tumor can pose a formidable challenge for clinicians when designing an appropriate plan for surgical reconstruction. The intention of this work was to restore the complex anatomy with maximum possible facial functionality and aesthetics of the patient. Based on the medical images generated by computed tomography (CT) scan an optimal therapeutic planning for complex maxillofacial reconstruction was designed. MethodFirstly, the volumetric data sets were carefully evaluated and deeply inspected for accurate diagnosis. Regarding 3D visualization of the CT scan images 3D virtual models for regions of interest were created using a special software of 3D Slicer. Using the resulting 3D virtual models a well-defined virtual surgical planning was generated for multiple surgical procedures, including the osteotomies for bone defects, harvesting autogenous bone graft and creating a customized implant. ResultsThe relevant patient-specific anatomical models for real surgery were translated into the 3D printed physical models, with which the surgeons can rehearse the surgery before coming into the operating room. Precisely defined multiple surgeries for complex maxillofacial reconstruction were proposed in this research that could be transferred to the real-time surgery. ConclusionsThe proposed surgical approach will be beneficial both for the surgeons and patient, including improvement in surgical precision and outcomes, reduction in operating time, as well as understanding surgical procedures and decision making etc.
A framework for change management in a design database

The complexity of many engineering designs is now so great that it is impossible for one engineer to complete a design alone. Instead, a team of engineers work collaboratively to achieve the design. This is known as concurrent design. Despite evolution of computer-aided design (CAD) tools toward integrated use of a design database, tools continue to assume that they will operate in isolation from one another and will take turns accessing and manipulating design data. The result is a tool-centric approach that makes close cooperation among a team of design engineers impossible. This thesis argues that a tool-centric approach is unsuitable in a design environment for concurrent design, which requires a new design-centric approach that does permit close cooperation, and that existing tools and design databases cannot offer that new approach. As a framework for the design-centric approach, this thesis presents the Change Manager, which is a collection of software modules that are distributed among CAD tools and the design database. The Change Manager augments the functionality of tools and the database by serving as an intermediary between application code in a tool, and design data in the database. The Change Manager offers a flexible model of concurrency control without the need for exclusive locks, and also provides support for close cooperation of engineers and their tools. The collaboration can be informal--directly among the engineers--as well as formal--computer-mediated. The Change Manager provides mechanism and protocol, but does not enforce policy. This thesis describes the architecture and operation of the Change Manager, explains how it supports a design-centric approach, and presents invariants that its operation guarantees.
Advantages of a buried-gate structure for graphene field-effect transistor

Graphene field effect transistors (GFETs) with top-gate and back-gate structures have been extensively used without much consideration for compatibility with graphene. A comparative study of the electrical characteristics of buried-gate GFETs and top-gate GFETs revealed that the performance of buried-gate GFETs is drastically enhanced by having a better gate controllability, achieving three times higher field effect mobility (∼3000 cm2 V−1 s−1) than top-gate GFETs with on/off ratio ∼10. Carrier scattering was also substantially improved by minimizing the fringing field effect, which is found to be the origin of high series resistance in top-gate GFETs. Moreover, we showed by electromagnetic (EM) simulation that the electric field distribution inside the transistors is more uniform at the buried-gate GFETs than the top-gate GFETs.
A Method to Assess the Enterprisewide IT Resources for Performance and Investment Justification

Most large enterprises are facing numerous challenges concerning their information systems, IS, and information and communication technology, ICT. Today, many enterprises employ a considerable number of applications that often have redundant functionality. There is also a large diversification in the ICT products and technologies employed. Further, integration costs are a major issue in almost all acquisition projects and many enterprises experience a lack of data quality and information security. The list of IS/ICT management challenges can be made much longer. At most enterprises, IS/ICT decisions are made by autonomous business units. In order to change the situation described above and build a more cost-effective IS/ICT environment, all business units need to make consistent IS/ICT decisions. Distributed and consistent decisions can only be made if the decision maker knows which decisions to make and why he/she needs to make them. The latter can be described by the target architecture for the whole enterprise IS/ICT, the information needed to conduct the business and its relationship to the business processes and business organization together with the benefits that the target architecture provides to the business. Which decisions to make are formulated into architectural principles, i.e. rules that express how your enterprise needs to design and deploy IS/ICT. The present thesis is a composite thesis including eight papers. The first four papers describe the reference model for IS/ICT management responsibilities that is one of the outcomes of the present research. Two different surveys have been performed in order to find out what the major IS/ICT management challenges are. The first survey was answered by 62 Swedish Chief Information Officers, CIOs, from large private enterprises as well as municipalities. The second survey was answered by twelve CIO’s from the European electric power industry. In the fifth paper, one of the IS/ICT management responsibilities, i.e. data quality, is used to illustrate how the IS/ICT manager’s responsibilities can be decomposed into measurable units. Over 70 respondents were used in order to perform an enterprise- wide measurement of the data quality at a Swedish insurance company. The last three papers are devoted to architectural principles. Architectural principles are introduced and guidelines on how to define and manage them are proposed in the sixth paper. The guidelines have been used in a review of Vattenfall’s architectural principles. In the last two papers, architectural principles and the reference model are combined in a methodology for assessing the enterprise architecture. The methodology has been used in two different case studies, one at Vattenfall and one at Scania. In both case studies multiple information systems were assessed from many different viewpoints resulting in that many respondents were interviewed.
Opportunities and planning in an unpredictable world

An agent operating in an unpredictable world cannot simply construct plans ahead of time and expect them to work perfectly. Instead, it must adapt its plans to the circumstances that it actually encounters. To do this, it must acquire information about the actual state of the world, and recognize when unpredicted situations affect its goals. Both problems are addressed in this thesis. The requirement for information arises out of the need to make decisions, and is thus a goal-directed activity. Plans to achieve information goals can be constructed in the same way as plans for other goals. This thesis describes Cassandra, a contingency planner whose plans include provisions for explicit decisions and the resulting information acquisition; and PARETO, a plan execution system whose plans also make explicit provision for information acquisition arising out of the need to make decisions. Plan adaptation during execution requires a unifying framework within which the plan construction and plan execution processes can be integrated. In this thesis the argument is made that the consideration of opportunities provides such a framework, and a mechanism is presented that enables an agent to recognize unexpected opportunities on the fly and respond to them appropriately and in a timely manner. Its implementation in PARETO is described. This mechanism is based on reference features, features that are both cheap and functional. These features appear to be prevalent in everyday life. Reference features form the basis of a powerful focusing mechanism that can help an agent balance deliberation and action by indicating both when deliberation would be productive and what the deliberation should be about. Their use by PARETO in recognizing and reasoning about opportunities is described.
Factors Associated with Unintended Pregnancy, Contraceptive Risk-Taking, and Interest in Pharmacist-Provided Birth Control

Data for this study were gathered through an anonymous, written survey of 97 adult women under age 50. Primary outcomes were unplanned pregnancy and contraceptive risk-taking, defined as inconsistent use of contraceptives without desire for pregnancy. Two multivariate logistic regression models identified factors associated with each outcome, adjusting for income, educational attainment, receipt of sex education, and birth country. A separate model determined factors associated with interest in pharmacist-prescribed contraception.
UHF FERROELECTRIC PHASE SHIFTER RESEARCH

Abstract : The analysis, construction, and performance of compact surface wave ferroelectric phase shifters suitable for operation in the 100 to 1000 mc frequency range are described. Although this ferroelectric loaded parallel plane structure is a very low impedance structure, a satisfactory terminal impedance matching technique has been devised, Kilovolt level voltages are needed; but since the current required to maintain or rapidly shift phase is low, the over-all control power requirements are at least an order of magnitude less than those for comparable ferrite phase shifters. One of these room temperature operable phase shifters provided 348 degrees of phase shift and had an insertion loss which varied from 3.7 to 2.2 db at 207 mc and over a zero to 4000 volt range of applied dc control voltage. (Author)
Coordination in Large-Scale Agile Development

In the last decade agile software development methods has become one of the most popular topics within software engineering. Agile software development is well accepted in small projects among the practitioner community and in recent years, there has also been several large-scale projects adopting agile methodologies, but there is little understanding of how such projects achieve eective coordination, which is known to be a critical factor in software engineering. This thesis describe an exploratory case study on how practices in an agile large-scale software development projects impact coordination. The goal is to provide a rich description on how practices are implemented in large-scale projects, and how they contribute to achieving eective coordination. The main ndings are that agile practices are implemented in the same fashion as they are in small projects, and eective coordination is achieved by reducing the needs for cross-team coordination through non-agile practices and handling unforeseen cross-team dependencies with agile practices.
Combined and I indices based on principal component analysis for damage detection and localization

In this paper, two indices (combined or phi index and I index), different to the presented in [1][2][3] are used to detect damages; these indices are calculated from the information obtained from the projection of the experiments into the PCA models (baseline). They give us a measurement about the difference between the tested and the healthy structure. The experiments are taken from an active piezoelectric system which is excited with lamb waves in different phases and the fact that any defect in the structure changes its vibrational response is exploited. For localization, five different methods of contribution analysis are used (complete decomposition contribution, partial decomposition contribution, angle based contribution, reconstruction based contribution and diagonal contribution). With these methods, the contribution of each sensor to each index is analyzed, in this way, sensor with largest contribution suggests the path where the damage could be located (from the actuator to this sensor). The combination of all indices and all contributions (a total of 2 x 5) are analyzed and compared. To validate the approaches, they are applied to an aircraft turbine blade instrumented with seven PZT’s. Different damages are simulated.
Capacity and cost analysis : Implementing a Just-in-time philosophy in annealing operations at Sapa Heat Transfer AB

Our work focuses on an analysis of the processes for full and partial annealing of aluminium coils. Due to inefficient production management these processes show high inventory levels, long lead times and decreased delivery performance. We have also found inadequacies in the ways costs for these processes are distributed. We have established a new process mapping by initially investigating the strategic dimensions of the company and the processes for annealing, in order to later on establish performance measures congruent with the business objectives. Furthermore we have conducted extensive calculations and analyses to facilitate the successful implementation of a Just-in-time production philosophy, including necessary process improvements and redesigns to be made. Our proposed changes will lead to shorter lead times and low levels of WIP, which are important success factors of a JIT-based production philosophy. To do this we have developed a capacity analysis tool with which it is also possible to analyse other processing scenarios or the effect of load changes and/or product mix variations. This tool can also serve as a benchmark for capacity analysis of other processes. Finally, we have been able to establish more accurate costs per machine hour for full and partial annealing to be implemented in the managerial system. We believe that the processes for annealing are not the only ones suffering from poor cost control, why we would suggest that Sapa Heat Transfer investigates the cost distribution in more processes, and also develops and follows better guidelines for cost control.