Suspended Access Research Articles

Evaluation of a Virtual Recreational Therapy Fieldwork and Clinical Supervision Program: Implications during the Pandemic and Beyond

Fieldwork and clinical supervision are vital to the growth and development of students during their Recreational Therapy (RT) education. However, restrictions on in-person instruction and suspended access to clinical agencies during the COVID-19 pandemic challenged educators to find new ways to provide these experiences. This retrospective program evaluation describes a virtual RT fieldwork and clinical supervision program, and assesses its effectiveness. Undergraduate students (n = 17) and RT clinical supervisors (n = 17) matched into dyads met virtually for one hour weekly over the course of 10 weeks. Data from separate student and clinical supervisor surveys were analyzed using frequency counts and thematic review. Findings suggest both students and clinical supervisors found value in this virtual fieldwork and clinical supervision program. Suggestions for program improvement/development as well as implications for RT education are discussed with emphasis placed on ways technology can expand opportunities for RT fieldwork and clinical supervision.

Influence made by industrial climbing safety equipment on the cardiovascular system performance and thermophysical parameters of limbs in an industrial climber at low ambient temperatures

The task of the article is to assess the effect made by an industrialclimbing safety system used by an industrial climber, performinghis work to provide a harness-based suspended accessat low ambient temperatures, on his physiological parameters.The article presents some studies on changes recorded in bodysurface temperatures, pulse rates, and blood pressure value inan industrial climber depending on the duration of his performanceusing a harness-based suspended access under ambientair low temperature conditions. The tests have been carriedout for various types of thermal protection of the human hiparea and the width of the belts of the safety system. The scientificnovelty of the study is that it is the first time when such astudy has been conducted for a combination of industrial factors,like prolonged suspended condition due to the utilizationof the climbing safety system and a low ambient temperature.As a result, it has been found that the physiological parametersare influenced by the width of the safety belts of the safetyequipment system and the method of the temperature protectionof the hip zone in a climber.

Sand and social distancing: A UAS study of Galveston, TX, beach attendance during COVID-19

As the COVID-19 pandemic spread in early 2020, Galveston, Texas, suspended beach access from 29 March 2020 through 1 May 2020. This action was designed to reduce the number of visitors to the island and to reduce nonsocially distanced interactions. After the 1 May 2020 reopening mandated by the Texas governor, numerous individuals, largely from the Houston area, drove to Galveston to use the beaches. At that time, TV coverage of the large crowds left the impression that there was little to no adherence to the reopening guidelines put forward by the state and city. In order to gauge the effectiveness/observance of the reopening guidelines by Galveston’s beachgoers, a headcount and analysis of the measured distance between individual beachgoers was completed on 23 May 2020 using Unmanned Aircraft Systems (UAS) photography and Geographic Information System (GIS) measurement techniques. By June, the number of positive COVID-19 cases was rapidly increasing in the Houston area. Despite minimal use of masks and little adherence to social distancing, there was sufficient space on the beach to handle the crowds provided beachgoers had adhered to social distancing guidelines. Two issues were identified: limited access points creating chokepoints when moving from the Seawall to the beach, and the pervasive use of shade devices (i.e. umbrellas, pop-up tents and canopies) that act as congregation spots.

The heritage and refurbishment of grade II listed piers at Whitby harbour, North Yorkshire

The £6.76 million refurbishment of Whitby's famous west and east piers improved the condition of the grade II listed structures into the foreseeable future. The project stabilised sandstone facing blocks, filled voids and repaired the deck surface to prevent damage from water ingress. A new flood deflector wall at the adjoining slipway was built in preference to a more visually intrusive flood gate alternative, and this wall now lessens the impact of wave run-up on the slipway during stormy sea conditions, protecting several commercial properties against sea flooding, which previously regularly occurred. The construction work, susceptible to unpredictable weather and undertaken in a hostile marine environment, was carried out from marine craft, using cranes with suspended access systems and divers, all working in tidal conditions. Through careful planning and coordination, construction was completed safely, ahead of programme and £150 000 under budget. This paper describes the physical setting and historic development of the harbour at Whitby, draws lessons from an earlier refurbishment of another grade II listed marine structure and demonstrates how these lessons were applied to the refurbishment of the Whitby harbour piers to ensure that the works remained sympathetic to the heritage values and iconic aesthetic setting of the area.

A Testing System for a Safety Lock based on LabVIEW

This paper proposes an accurate and efficient testing system for the safety lock that is used in the suspended access platforms. The measurement methods conform to the standard EN 1808:2015. First, the whole architecture of the system is designed, including the mechanical structure unit, lower control unit, sensors and data acquisition. Second, the upper control software based on LabVIEW is presented. In addition, manual and automatic testing modes are proposed. The field experimental results demonstrated that the proposed testing system has the advantage of high accuracy, high automation and high efficiency.

Parametric Design of Suspension Rig Based on VB and ANSYS

With self-developed designs the large load temporarily installed suspended access equipment (gondola) ZLP3000 as the prototype, based on the interface file formed by APDL and VB, the suspension rig parametric design program which regarded parameterized virtual design and finite element analysis as the core was designed. Parametric modeling of the overall structure, the optimization of the analysis and the result output were achieved. Multiple sets of schemes results data were extracted in the VB output interface, the optimal scheme of suspension rig structure layout was obtained based on comparative analysis of those data.

Dynamic Simulation and Optimization of Suspension Rig Based on ADAMS

Take the large load temporarily installed suspended access equipment ZLP3000 by self-designed as the prototype, the rigid-flexible coupling dynamic model of suspension rig was established by using ADAMS based on the virtual prototyping technology. First, the reliability and accuracy of the model were verified by analysis of the model dynamics simulation. Second, the sensitivity analysis report of model design variables were generated by the establishment of the suspension rig parametric model. Finally, the parametric model was optimized based on the results of the sensitivity, the optimum scheme of suspension rig force bearing point and steel wire ropes lifting position were obtained, which could provide the basis for the rational use and layout of the steel wire ropes and steel.

Application of Adaptive Fuzzy PID Leveling Controller

Aiming at the levelling precision, speed and stability of suspended access platform, this paper put forward a new adaptive fuzzy PID control levelling algorithm by fuzzy theory. The method is aided design by using the SIMULINK toolbox of MATLAB, and setting the membership function and the fuzzy-PID control rule. The levelling algorithm can real-time adjust the three parameters of PID according to the fuzzy rules due to the current state. It is experimented, which is verified the algorithm have better stability and dynamic performance. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2563

Analysis of Stress-Strain Distribution for Wire Rope of Traction Hoister

Besides the material properties and operating environment, the strain and strain state of the wires in multi-stage twisted rope with large frictional contact force, as applied in traction hoister of suspended access platform, strongly influence their service life. For an accurate quantitative prediction of the performance and a proper understanding of the underlying phenomena, a detailed analysis of the stress-strain distribution along all individual wires is required. For this, a numerical model for a wore rope in traction hoister was describe to be considering the complex strand pattern, mutual interaction by contacts form surrounding strands and contact deformation, in this paper. The model well understood response of wire rope under an axial tensile load and twisting moment, and concise described the effects of rope deformation on the rotate ratio and slip behavior of the hoister. The results of this model were compared with the experiment analyzed, which showed that the inclusion of interfacial forces at the contact locations and their associated effects of internal force of helical wires is importance.

Structural Optimization of Suspension Mechanism Based on APDL

In this subject, there were the Analysis Parametric Design Language (APDL) and optimization of the design process to be introduced. Based on APDL and optimization design module of ANSYS, the structure of suspension mechanism was optimized and the extraction of the maximum stress of the beam structure was realized according to the actual work of the large load temporarily installed suspended access equipment. The optimization of product structure was achieved and the utilization of materials was improved by the minimum structural quality of the suspension mechanism as the optimization objective. The study could provide reference for the similar products on design and development.

FEM Analysis and Optimization of Large Load Suspended Platform

Based on the Finite Element Method, the suspended platform of temporarily installed suspended access equipment was simplified and the special connection positions were dealt with rigidization and coupling, thus the finite element model of suspended platform was established. Analyzing major structures of finite element model in different section dimensions, the reasonable scheme could be ascertained and the section dimensions of major structures in different materials could be obtained. Combining with the test results, the rationality of finite element analysis could be proved. The study could provide reference for the similar products on design and development.

Assessing the Influence of Online Activism on Internet Policy-Making: The Case of SOPA/PIPA

This paper analyzes the influence of online activism, especially technical activist actions like web blackouts, on the policy-making process. It compares the actions associated with anti-SOPA campaigns in the United States with campaigns against ACTA in Europe. In order to investigate the various linked aspects of internet activism’s impact on policy change, this paper examines how online activism shifted the ways that these bills were covered by the popular press and how press coverage modeled new frames. In the United States, salient actions included suspended access to web sites including Wikipedia, symbolic actions such as 'black outs' of some website content, and mobilization efforts including invitations to contact elected representatives. For European advocates organizing against ACTA, this meant that some new frames for action were available in the early months of 2012. This analysis contributes to contemporary readings of ‘mediated opportunity structures’ by focusing on two new aspects: the mediatized nature of contemporary activism (especially ‘recursive’ activism that uses disruption of internet communications to draw attention to digital rights) and the significance for policy making of claims that the internet is ‘exceptional.’This is a Slightly Revised Version of a Paper Presented at EUROCPR, Brussels, on March 21, 2013. Please Cite With This Information.

Analysis of Leveling Control System via Iterative Linear Matrix Inequalities with Full Order Observer

Abstract. This paper investigates leveling control system of suspended access platform using an observer-based controller. Uncertain linear systems for leveling control are derived and represented in terms of a set of matrix inequalities. In the system, all state variables needn’t be measured; the perturbations of leveling control are assumed to be described by structural uncertainties. The stiff problem is avoided since the design procedure is independent of the small parameter. The control problem can be effectively solved by the proposed iterative linear matrix inequality approach. The convergence of the algorithms is also studied. Furthermore, a numerical example and simulation results are given to illustrate the effectiveness of proposed method.

Modal Analysis of Temporarily Installed Suspended Access Equipment Based on ANSYS

The paper chooses ZLP800 temporarily installed suspended access equipment (TISAE) as a object of study, it is based on theory of structural model analysis. The finite element model has been established by the finite element method (FEM). The model is analyzed by the modal analysis module of ANSYS, the first four natural frequencies and corresponding modal shapes are extracted in this paper, the cause of every modal shapes are analyzed in the paper. In order to get a more rational constraint mode, the natural frequency under different constraint condition is calculated. Then the external excitation factors, such as the vibration frequency of the electrical machine in a hoister, swing of suspended platform and the friction disk in a hoister are calculated respectively, finding the external excitation factors which would cause a sympathetic vibration, and giving the suggestions for averting the sympathetic vibration, providing some academic reference to improve and perfect the structure design of the TISAE products.

Mechanical Properties Analysis of Combined Structure of Suspension Platform of Suspended Access Equipment

Based on the theory of structural mechanics, it has established that a simplified mechanical model of suspension platform of ZLP800 suspended access equipment (SAE) in this paper. Under the two common combinations we could calculate and comparatively analyse deflection of variable stiffness structure of suspension platform. On this basis, 15m span suspension platform module combination was obtained by the enumeration method. Moreover, by deflection calculations of the platform structure in different combinations，we could obtain the best module combination so as to provide a theoretical basis for the design of large span suspension platform.

Design and Development of New Auto-Detecting Platformfor Hoists of Suspended Access Platform

A new detecting platform has been designed and developed to improve the performance of suspended access platform’s hoists in the paper. The new platform consists of a mechanical and control piece. The core control system is designed based on S7-200PLC and VB6.0; Computer is a superior machine and S7-200PLC is an inferior machine in the system; VB6.0 is used in the superior machine as the development platform. Testing data will be saved into Excel2000 by using VB's OLE automation technology; and in the VB environment, using OPC standard drive will complete real-time data communication between superior and inferior, also complete data processing at the same time. Therefore, Man-machine interface and reliable control system can be built. The inferior computer can achieve running and testing process control of hoists and collect the data of tension, vibration and temperature of hoists. The practical application of the platform shows that the system can well reduce the time costs and improve test results’ inaccurate of existing detection methods. The detection efficiency is improved; the labor intensity of operators and the running costs of produces are reduced, greatly.

Research on Automatic Control System of Suspended Access Platform Based on PIC16F877A

The design of automatic control system mounted on the suspended access platform is put forward. With advantages of the microcontroller in real time data acquisition and data processing, PIC16F877A is applied as controller of the system. Angle sensor and pull sensor are applied as measuring elements of the system. The control system can implement functions of automatic leveling and overload protection. The new automatic control device is tested to be easy to operate and high reliability. It completely meets requirements and suits for multi-series specifications suspended access platforms, worth to be widely extended in applications.

Efficient coupling to W1 photonic crystal waveguide on InP membrane through suspended access guides

Suspended access ridges have been designed and integrated with a single-missing row photonic crystal guide on InP membrane in order to improve the coupling efficiency. This integration provides control of the injection into the photonic crystal (PhC) guide and a deterministic choice of the termination of the PhC. Low propagation losses have been measured for both the photonic crystal guide on InP membrane and the suspended ridges.

A remotely operated building inspection cell

This paper describes a remotely operated inspection cell which is currently being developed for high rise, buildings. In a few of these buildings reinforced concrete has been found to be in an advanced state of decay, and thus the need to operate inspection and monitoring programmes has arisen. Following a brief account of concrete decay and the commonly used inspection and detection methods, the operational requirements for the automation of each inspection element are discussed. A prototype cell, based on the use of a conventional suspended access platform, is described with fuller details given of some elements. In the conclusion, the ongoing research and development strategy is presented, with attention drawn to the key enabling technology areas.