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1
Anderson, Eric J., and Matthew E. Brock. "Being in the Right Place at the Right Time: Educational Placement of Students With Intellectual Disability by State and Year." Inclusion 8, no. 3 (September 1, 2020): 210–21. http://dx.doi.org/10.1352/2326-6988-8.3.210.
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Abstract Despite the longstanding federal mandate to place students with disabilities in general education classrooms to the maximum extent appropriate, most students with intellectual disability continue to spend most of their time in separate classrooms and schools. In this study, we describe longitudinal educational placement patterns in six states that represent the wide span of educational placement (i.e., Vermont, Kentucky, Kansas, Massachusetts, Illinois, and Montana). Surprisingly, some states are trending toward more restrictive placements, and the gap between the most and least inclusive states is continuing to widen over time. We offer constructive suggestions for appropriately applying the principle of least restrictive environment so that placement decisions are driven by student needs and not where students live.
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Ishak, Muhammad Farhan, Mohammed Rafiq Abdul Kadir, Habibollah Harun, and Shaifuzain Abdul Rahman. "The Effect of Cannulated Screw Placement Angle in the Management of Femoral Neck Fracture." Advanced Materials Research 845 (December 2013): 216–20. http://dx.doi.org/10.4028/www.scientific.net/amr.845.216.
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Fixation with cannulated screw was widely accepted for management of femoral neck fracture. However, the angle of placement cannulated screw for management of femoral neck fracture still controversial. The present study aims to investigate the mechanical behavior of the cannulated screws with two different angles of placements which are 135o and 150o in inverted triangular configuration for management of femoral neck fracture via finite element method. Therefore, the 3D model of a proximal femur consist of femoral neck fracture was constructed from CT data images using medical image processing software. The von Mises stress distributions on the cannulated screws were compared between each screw angle placement. The result showed that the cannulated screws in inverted triangle with 135o of placement angle have better stress distributions than 150o placement angle.
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Murdoch, Ian J. "Developments in the Evaluation of Work-Based Learning." Industry and Higher Education 18, no. 2 (April 2004): 121–24. http://dx.doi.org/10.5367/000000004323051895.
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UK higher education institutions are now expected to be able to demonstrate that they are adhering to the Code of Practice for the Assurance of Academic Quality and Standards in Higher Education in Placement Learning. The responsibility for ensuring that a placement provides an adequate opportunity for its intended learning outcomes rests with the educational institution. This paper draws on the author's experience of the management and evaluation of placements in the construction sector. In recognition of the increasingly global nature of the business, a placement programme has been developed to meet the particular challenges of students operating in multidisciplinary and multicultural environments. Participation in the European Commission's Leonardo da Vinci Vocational Training Programmes and pilot projects has enabled the identification of further criteria for evaluating and disseminating experience gained in work-based learning across the frontiers of language and culture. However, the paper also identifies problems peculiar to the UK market for construction professions and higher education programmes in construction-related disciplines. A study by Northumbria University highlighted challenges for both industry and higher education arising from economic pressures on students and the positioning of construction-related courses in the higher education market. Given the global nature of the construction business, it is clear that there are significant benefits to be gained from taking a global view of relevant issues.
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Wen, Yong-Kui, and Li-Min Sun. "Distributed ATMD for Buffeting Control of Cable-Stayed Bridges Under Construction." International Journal of Structural Stability and Dynamics 15, no. 03 (March 8, 2015): 1450054. http://dx.doi.org/10.1142/s0219455414500540.
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This paper is concerned with mitigating multimode buffeting of cable-stayed bridges by optimizing the placements of active tuned mass dampers (ATMDs) and sensors and developing a control model and schemes. The Third Nanjing Bridge over the Yangtze River was used to formulate a mathematical control model with distributed ATMDs under wind action. Hankel norms were combined with structural mode analysis to build placement indices of the ATMDs and sensors under a defined objective while considering the influence of exterior excitation. A selection index of modes was proposed. ATMD/sensor placement on the Third Nanjing Bridge and mode selection were simulated to determine the wind response control. A control design model with accurate mode selection was developed using modal superposition and it was used to investigate control schemes of distributed ATMDs for buffeting response control of the cable-stayed bridge. The results showed that the dynamic characteristics of the developed control design model agreed well with those of the original system model. Control scheme selection depends on the tradeoff between the control objective and actuator performance. Considering realistic engineering constraints, the distributed ATMDs are shown to perform well.
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Fernando, Emmanuel G. "Applicability of New Flexible Pavement Smoothness Specification for Asphalt Overlays." Transportation Research Record: Journal of the Transportation Research Board 1575, no. 1 (January 1997): 18–24. http://dx.doi.org/10.3141/1575-03.
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The Texas Department of Transportation plans to implement smoothness specifications based on profilograph testing for all asphalt concrete paving projects as part of its construction quality control/quality assurance program. Smoothness specifications have been developed for newly constructed asphalt and portland cement concrete pavements. In a move to develop a similar specification for asphalt concrete overlays, the Texas Transportation Institute was asked to evaluate the applicability of the existing flexible pavement smoothness specifications for the quality control and quality assurance of pavement rideability on overlay construction projects. This study was intended to provide the state with the information necessary to evaluate the improvement in ride quality that may be expected from placement of asphalt overlays, particularly for thin overlays [38 to 51 mm (1.5 to 2 in.)], which are generally constructed in Texas. To collect data to determine whether the existing specification can be implemented for overlay construction work, TTI monitored a number of overlay projects during the 1994 calendar year. Profilograph measurements were made during these projects before any surface preparation, after surface preparation, and after placement of the asphalt concrete overlay. All of the projects monitored involved thin overlays. The data collected indicate that the existing smoothness specifications can be implemented on overlay projects, provided that appropriate surface preparations (e.g., milling, level-ups) are conducted to correct existing surface distresses before placement of the overlay.
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Johnson, Cody L., Brian C. McFall, Douglas R. Krafft, and Mitchell E. Brown. "Sediment Transport and Morphological Response to Nearshore Nourishment Projects on Wave-Dominated Coasts." Journal of Marine Science and Engineering 9, no. 11 (October 27, 2021): 1182. http://dx.doi.org/10.3390/jmse9111182.
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Nearshore nourishments are constructed for shoreline protection from waves, to provide sediment nourishment to the beach profile, and to beneficially use dredged sediment from navigation channel maintenance. However, it is poorly understood how placement morphology and depth influence nearshore processes operated on wave-dominated coasts. This study investigates the wave fields, sediment transport, and morphological response to three common nearshore nourishment shapes, nearshore berm (elongated bar), undulated nearshore berm, and small discrete mounds, with numerical experiments utilizing the Coastal Modeling System. The nourishments are placed in depths between 3 m and 7 m with a volume of approximately 100,000 m3 and between 400 m and 1000 m in alongshore length. Numerical experiments are carried out in three distinct coastal settings with representative wave climates and geomorphology. Simulation results indicate that shallower, more continuous berms attenuate the most wave energy, while deeper, more diffuse placements retain more sediment. Results from this study improve the understanding of nearshore nourishment shapes and can support decision makers identifying the most appropriate construction technique for future nearshore nourishment projects.
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Wang, Hao, Erhu Yan, Wei Liu, Chongbo Di, Jian Cheng, Renjun Huang, Xiaoyu Ge, et al. "Evolution of Unidirectional Solidification Microstructure and Hydrogenated Treatment of Nb-Ti-Co Quasiperitectic Alloys." Journal of Physics: Conference Series 2079, no. 1 (November 1, 2021): 012013. http://dx.doi.org/10.1088/1742-6596/2079/1/012013.
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Abstract Titanium alloys have a wide range of applications, and the internal placement of hydrogen into them can modulate the microstructure of the alloys and thus have great potential for further development. However, few studies have been reported on the application of this technique to Nb-Ti-Co ternary alloys, which needs to be urgently investigated. In this paper, four types of alloys (Nb10Ti61Co29, Nb15Ti55Co30, Nb20Ti50Co30, and Nb25Ti50Co25) are selected near the eutectic point of the phase diagram to study their placement of hydrogen by both static and dynamic processes of hydrogen’s placements, focusing on the effects of the temperature, time, and hydrogen-flow rate of such processes on the amount of hydrogen placements. The relationship between the hydrogen replacement parameters and the mechanical properties of the alloys is constructed. The results show that the placed-hydrogen amount of Nb-Ti-Co as-cast alloy grows with the increase of hydrogen-flow rate and soaking (or holding) time, with an upper limit of the placed-hydrogen amount, and the pattern of the directionally- solidified alloys is similar to that of the as-cast alloys; however, at a certain soaking time and hydrogen- flow rate, although the placed hydrogen amount of both alloys rises with the increase of temperature, the placed-hydrogen amount of Nb-Ti-Co directionally-solidified alloys is always larger than that of the as-cast alloys. However, the amount of hydrogen placement in the Nb-Ti-Co directionally-solidified alloys is always larger than that in the as-cast alloys, and the amount of hydrogen placement decreases significantly as the growth rate of the alloys increases. In addition, the microhardness decreases with increasing growth rate in the directionally-solidified specimens, and the amount of hydrogen placement and microhardness increase with growing Nb content.
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Lin, Jian-Fu, You-Lin Xu, and Sheng Zhan. "Experimental investigation on multi-objective multi-type sensor optimal placement for structural damage detection." Structural Health Monitoring 18, no. 3 (July 11, 2018): 882–901. http://dx.doi.org/10.1177/1475921718785182.
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An optimal sensor placement with multiple types of sensors could provide informative data of a structure to facilitate its structural damage detection. A response covariance-based multi-objective multi-type sensor optimal placement method has been thus developed. To validate this method, an experimental investigation was designed and performed in terms of a nine-bay three-dimensional frame structure, and the experimental details and results are presented in this article. The frame structure was first built, and a finite element model of the frame structure was constructed and updated. The proposed method was then applied to the finite element model to find the optimal sensor placement configuration. The multi-type sensors were then installed on the frame structure according to the determined optimal sensor numbers and positions. Different damage scenarios were then generated on the frame structure. These damage scenarios covered single and multiple damage cases occurring at different locations with different damage severities. A series of experiments, including the optimal and non-optimal sensor placements, were finally carried out, and the measurement data were used together with the finite element model to identify damage quantitatively. The identification results show that the optimal multi-type sensor placement determined by the proposed method could provide accurate damage localization and satisfactory damage quantitation and that the optimal sensor placement yielded better damage identification than the non-optimal sensor placement.
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Saab, Youssef. "A Fast Clustering-Based Min-Cut Placement Algorithm With Simulated-Annealing Performance." VLSI Design 5, no. 1 (January 1, 1996): 37–48. http://dx.doi.org/10.1155/1996/58084.
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Placement is an important constrained optimization problem in the design of very large scale (VLSI) integrated circuits [1–4]. Simulated annealing [5] and min-cut placement [6] are two of the most successful approaches to the placement problem. Min-cut methods yield less congested and more routable placements at the expense of more wire-length, while simulated annealing methods tend to optimize more the total wire-length with little emphasis on the minimization of congestion. It is also well known that min-cut algorithms are substantially faster than simulated-annealing-based methods. In this paper, a fast min-cut algorithm (ROW-PLACE) for row-based placement is presented and is empirically shown to achieve simulated-annealing-quality wire-length on a number of benchmark circuits. In comparison with Timberwolf 6 [7], ROW-PLACE is at least 12 times faster in its normal mode and is at least 25 times faster in its faster mode. The good results of ROW-PLACE are achieved using a very effective clustering-based partitioning algorithm in combination with constructive methods that reduce the wire-length of nets involved in terminal propagation.
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Martínez-Torres, Luis M., and Miguel Martínez-Fernández. "Construction Systems of Neolithic Dolmen Walls on the Iberian Peninsula." Open Construction and Building Technology Journal 8, no. 1 (March 7, 2014): 46–51. http://dx.doi.org/10.2174/1874836801408010046.
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Walls of corridors and chambers in the Neolithic dolmens of Portugal and Spain were constructed using megalithic slabs or masonry. When constructed with slabs, the slabs were arranged using two very different construction systems, based either on placement of an orthostat or on imbrication of the slabs. Although generally dolmens are described with orthostats, on the Iberian Peninsula are most often constructed using imbricated slabs. The walls of orthostatic and masonry dolmens are lintelled structures. The walls of imbricated slab dolmens, however, are unique structures without later representation. Temporally, the orthostatic dolmens represent the earliest construction system, followed by those of imbricated slabs and finally those of masonry. This evolution can be explained in terms of the capacities of the selfsupporting walls and simplification of the construction processes.
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Bremner, J. Gavin, and Tinu C. Idowu. "Constructing Favourable Conditions for Measuring the Young Child's Understanding of the Terms in, on and under." International Journal of Behavioral Development 10, no. 1 (March 1987): 89–98. http://dx.doi.org/10.1177/016502548701000106.
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Recent research has indicated that young children's responses to requests containing the prepositions in, on and under are strongly influenced by the context in which they are made, but that they probably understand the terms in and on before the term under. However, these studies employed contextual manipulations that bias the child towards one particular placement. In this study, the contextual manipulation involved a pre-test activity aimed at equating the likelihood of all three placements. Children from 1 year 6 months to 3 years old showed markedly better comprehension of the terms than children who were not exposed to such pre-test activity. This superiority cannot be put down to contextual bias towards a particular placement, and hence performance under these conditions may give a better measure of actual comprehension. It is suggested that the conditions in real life that force a clear distinction between spatial prepositions are those similar to the present experimental manipulation, in which one object commonly enters into more than one relationship with another.
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Medina, Josep R., M. Esther Gómez-Martín, and Antonio Corredor. "INFLUENCE OF ARMOR UNIT PLACEMENT ON ARMOR POROSITY AND HYDRAULIC STABILITY." Coastal Engineering Proceedings 1, no. 32 (January 30, 2011): 41. http://dx.doi.org/10.9753/icce.v32.structures.41.
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The handling procedure and placement grid of concrete armor units (CAUs) are the key construction factors of armor layers. This paper analyzes conventional cube and Cubipod CAUs which are handled by pressure clamps and placed randomly. Two methodologies for small-scale blind construction of armor layers in laboratories are compared using a Cartesian system and crawler cranes. Model construction by hand in laboratories is usually done in excellent conditions contrary to actual construction at prototype scale which is blind underwater and is influenced by wind, waves and equipment constraints. For randomly placed CAUs, the layer coefficient is an unnecessary and subjective concept which should be disregarded to prevent misunderstandings when considering armor porosity. For a given CAU, the placement grid affects armor porosity which is directly related to armor hydraulic stability. Crawler cranes can only place CAUs in a narrow armor porosity band; therefore, porosity of small scale armor models constructed by hand must be selected within that viable porosity band to avoid uncontrolled model effects. Armor layers of conventional cubes placed randomly by hand are not realistic if porosity is p%
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Janakiraman, P. A., and A. Bhattacharyya. "Direct Pole Placement without using Observers." Journal of Circuits, Systems and Computers 07, no. 02 (April 1997): 117–27. http://dx.doi.org/10.1142/s0218126697000097.
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A new and direct approach to solve the pole placement problem for a given linear plant is reported in this paper. The conventional procedures involve complete identification of the plant and construction of either an Asymptotic or Kalman Filter type observer which use the estimated plant parameters. The estimated state variables are then fed back to place the poles at the desired locations. In the new method suggested in this paper, a simple model is constructed based on specified pole locations. A minimum number of coefficients related to the zeros of the plant and state feedback are determined together by a composite identification algorithm. When the plant input/output are corrupted by noise, it is possible to obtain accurate estimates of the parameters by using a periodic probing signal. The new procedure discussed involves minimum amount of computation for solving the direct pole placement problem. The core of the model itself takes the role of an observer.
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Chapin, Steve J., and Eugene H. Spafford. "Support for Implementing Scheduling Algorithms Using MESSIAHS." Scientific Programming 3, no. 4 (1994): 325–40. http://dx.doi.org/10.1155/1994/326352.
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The MESSIAHS project is investigating mechanisms that support task placement in heterogeneous, distributed, autonomous systems. MESSIAHS provides a substrate on which scheduling algorithms can be implemented. These mechanisms were designed to support diverse task placement and load balancing algorithms. As part of this work, we have constructed an interface layer to the underlying mechanisms. This includes the MESSIAHS interface language (MIL) and a library of function calls for constructing distributed schedulers. This article gives an overview of MESSIAHS, describes two sample interface layers in detail, and gives example implementations of well-known algorithms from the literature built using these layers.
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Shi, Lingpeng, Shida Lu, Tianbo Feng, Xiumin Zhao, Xiaolu Chen, and Haoyang Cui. "Research on Multi-Objective Optimization Method of Edge Cloud Computing Virtual Machine Placement." Journal of Physics: Conference Series 2195, no. 1 (February 1, 2022): 012012. http://dx.doi.org/10.1088/1742-6596/2195/1/012012.
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Abstract With the emergence of demand for massive computing tasks in the edge cloud of the city, the disordered computing in the edge cloud leads to the high energy consumption of CPU computing and the problem of too long time delay caused by the blockage of computing tasks. This has become the first technical difficulty to solve in the construction of edge cloud. The virtual machine placement method is optimized by computing energy consumption and computing delay. First, the LRR physical host screening model is constructed to detect the status of the physical hosts and form a list of migrated physical hosts; secondly, the MMT time scale model is constructed to generate the list of migrated virtual machines; finally, the GA algorithm is used to place the virtual machines. The simulation results show that this algorithm can reduce the CPU energy consumption of the edge cloud center by 20. 21% and the time delay by 16. 11%. This optimization method has a good theoretical guidance effect on the construction of cloud computing.
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Boykov, A. A. "BUILDING MODELS OF DYNAMIC CANAL SURFACES VIA GEOMETRY CONSTRUCTIONS LANGUAGE." Vestnik komp'iuternykh i informatsionnykh tekhnologii, no. 220 (October 2022): 15–29. http://dx.doi.org/10.14489/vkit.2022.10.pp.015-029.
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Building computer models of dynamic canal surfaces is a special case when implemented in CAD-systems since existing methods of surface modeling of such type are concentrated mostly on obtaining analytical expressions such as equations for the surface itself or its sections. The article introduces a constructive method of building models based on plane and spatial geometric constructions. The paper provides the analysis of given surface parameters, constructive algorithms for setting up a geometric correspondence between the graph of the cross-sectional area and the directrix, constructing of cross-section for the given point on the cross-section area graph as well as placement the cross-sections in three dimensions and determining spatial coordinates of the points on the surface. This allows to build a structured point cloud of a dynamic canal surface of required density and build a model of it in CAD-systems. Suggested constructive algorithms are applied with the help of GC language commands. The paper provides fragments of construction subroutines as well as examples of created models of dynamic canal surfaces. The approach proposed provides for automation of building models of surfaces in CAD-systems, moreover it is flexible to adjust according to the given parameters such as a directrix shape, cross-section area graph, a cross-section shape, etc.
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Kvočák, Vincent, Viktória Kožlejová, and Katerina Chupayeva. "State of the Art in the Utilization of Deck Bridges with Encased Filler-Beams in the Standard Construction Practice." Selected Scientific Papers - Journal of Civil Engineering 8, no. 1 (June 1, 2013): 107–14. http://dx.doi.org/10.2478/sspjce-2013-0012.
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Abstract Deck bridges with encased filler-beams have been used in construction for a long time. Nowadays they are employed mainly in the refurbishment of railways and in road construction. Regarding the method of construction, they can be divided into monolithic/cast-in-place (constructed fully in its final location) or prefabricated/precast structures (built at another location and then transported to their final location for placement in the full structure). Both methods of construction have certain advantages and disadvantages. Decision-making and selecting a better alternative depends on the building conditions and a means of transport (whether a road or railway) running on the bridge.
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Tavane, Pradeep N., Sathish Abraham, Anand U. Madihalli, Naveen S. Yadav, P. Manoranjan Reddy, and G. Baiju. "A Comparative Study of Impression Procedures for Distal Extension Removable Partial Dentures." Journal of Contemporary Dental Practice 12, no. 5 (2011): 333–38. http://dx.doi.org/10.5005/jp-journals-10024-1055.
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ABSTRACT Aim This study was carried out with the purpose of comparing three impression methods as to which of them placed tissues most favorably. Methods The methods used were Hindels method, selective tissue placement method and functional reline method. The measurements obtained were analyzed to determine which of the three impression methods placed the mucosal tissues maximally. To compare and measure tissue placements, autopolymerizing acrylic resin platforms were constructed to the height of the occlusal surfaces of the remaining teeth. 15 orthodontic buccal tubes were placed on each side of the platform. They were arranged in three sets of five and attached to the platform over selected reference regions by means of autopolymerizing resin. The selected reference areas were in anterior, middle and posterior areas of the ridge on either side. Results No significant difference was seen in tissue placement in the anterior middle and posterior regions in each of the three methods when each method was assessed separately. Selective tissue placement method placed the tissues maximally (7.547 mm) followed by Hindels method (7.2110 mm) and the least placement was by functional reline method (5.856 mm). Tissue placement was significantly higher in Hindels method as compared to functional reline method (p < 0.001). Conclusion Tissue placement was maximum in the posterior region, followed by the middle region and least in the anterior region of the mandibular ridge for all three methods. Selective tissue placement method showed the maximum overall tissue placement followed by the Hindels method and minimum placement was by functional reline method. Clinical significance Selective tissue placement method provided maximum overall tissue placement and can be a preferred technique for impression making for bilateral distal extension removable partial denture fabrication. How to cite this article Madihalli AU, Tavane PN, Yadav NS, Abraham S, Reddy PM, Baiju G. A Comparative Study of Impression Procedures for Distal Extension Removable Partial Dentures. J Contemp Dent Pract 2011;12(5):333-338.
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Maher, Anthony, David Morley, Julie Fimusanmi, and Paul Ogilvie. "The impact of a special school placement on self-perceptions of confidence and competence among prospective PE teachers." European Physical Education Review 25, no. 2 (December 20, 2017): 474–90. http://dx.doi.org/10.1177/1356336x17746949.
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School-based placements are often used as a way of preparing prospective teachers for the demands of their future role. However, little is known about the impact of such situated learning experiences on prospective physical education (PE) teachers’ confidence and competence. To the best of our knowledge, this article is the first of its kind to explore prospective teachers’ views of, and experiences within, special schools in order to identify the experiential mechanisms that shape self-perceptions of competence and confidence when teaching pupils with special educational needs and disabilities in PE. Thirty-two final year undergraduate students participated in focus group interviews and were selected on the basis that they: (1) were studying a Special Educational Needs and Disability in PE undergraduate module; (2) aspired to be a PE teacher; and (3) had attended six half-days of placement in a special school. All focus group transcripts were subjected to open, axial and selective coding in order to identify themes and sub-themes. The themes that were constructed from the analysis were: impact of placement role on confidence and competence; impact of knowing pupils’ needs and capabilities; conceptualising confidence and perceptions of its development; and conceptualising competence and perceptions of its development. We use these themes to discuss the usefulness of special school-based placements for preparing aspiring teachers for their role as inclusive educators.
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Zhu, Zhen Yang, Sheng Qiang, Min Zhi Liu, and Hai Bo Wang. "Cracking Mechanism of RCC Dam Surface and Prevention Method." Advanced Materials Research 295-297 (July 2011): 2092–96. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2092.
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Using low placement temperature and proper water pipe cooling water, the cracks are rarely appears in the interior of the dam, but the surface of the dam is prone to cracking. During the construction, the surface of the dam may be wet due to several factors such as creep, maintenance and so on, so the effect of the heat preservation is always been over-estimated. For those concrete blocks constructed in cold season, without proper heat preservation, the cracks are easy to appear soon after construction. For those concrete blocks constructed in hot period, under the influence of air temperature, the temperature of those concrete within about 5.0m of the dam surface are hard to control. So the key point to prevent the dam surface constructed in cold period is to take heat preservation measure suiting the on-the-spot situation. And for those dam blocks constructed in hot period, water cure on the surface of the dam can greatly reduce the risk of dam surface cracking.
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Rosidi, Dario. "Incremental Strength Gain Considerations in Staged Roadway Construction." Civil Engineering Dimension 24, no. 2 (October 3, 2022): 125–32. http://dx.doi.org/10.9744/ced.24.2.125-132.
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This paper presents an alternative construction method of a highway along coastal area underlain by thick normally consolidated very soft organic clay. Due to its remote location, mitigations to strengthen the soft clay are deemed too costly and/or require significant time to mobilize. Without mitigations, the presence of this very soft clay necessitates the roadway embankment to be constructed in phases to allow partial consolidation of clayey soils to take place before additional embankment fill can be placed. At each construction phase, the additional fill thickness and staging time are determined, and the corresponding degrees of consolidation and incremental strength gains are calculated at discrete grid points within the soft organic clay. The stability of the partially built embankment is then evaluated, and the fill thickness and staging time are adjusted to meet the stability safety requirements. The settlement due to fill placement can be estimated at each construction phase and included as an overbuilt to the next fill placement thickness. Impacts of soil horizontal and vertical movements due to filling to pile foundations are also be discussed.
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Vartanov, Alexander, Irina Markova, and Anatoly Fedash. "On the optimization of the construction of ventilation systems during the construction of metro by underground method." MATEC Web of Conferences 265 (2019): 05028. http://dx.doi.org/10.1051/matecconf/201926505028.
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The article discusses optimal versions for placement of ventilation systems for deep-laid underground lines, performed in a closed way, with the removal of the ventilation chamber from the ventilation output and placing it either in the ventilation shaft or in a specially constructed ventilation chamber located near the trunk, which significantly simplifies the design of excavation, and as a result, speed up its construction. To reduce the construction time, it is proposed to perform parallel work on the vent development and the ventilation chamber, including the possible installation of process equipment in parallel with the mining operations during the construction of the metro by the underground method.
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Li, Jie, Su Chao Xu, and Chang Yu Jin. "Timing Analysis on Rock-Bolted Crane Beam of the Underground Power House of Jinping II Hydropower Station." Advanced Materials Research 594-597 (November 2012): 769–72. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.769.
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According to design requirements, to reduce the construction difficulty for crane beam on rock wall in underground main power house of JinpingII hydropower, and to condense construction time limit for a main building, theconcreting time for crane beam on rock wall is needed to be specially analyzed. As the property of JinpingII hydropower station is under high field stress, numeric analysis uses rock mass deterioration constitutive model RDM. Considering the special mechanics behavior between concrete and rock wall, softening element and interface element are used respectively to make the simulation. By analyzing the stress for different placement times of crane beam of main house, it is shown that placement timing has certain extent effect on upper stress of crane beam. As a result, in order to assure stability of constructing and operating periods of crane beam, the calculation and analysis suggest that the concreting should be after the third excavation, but certain structural joint need to be installed.
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Bentley, Erinn, Madison Workman, and Alex Overby. "Being “adopted” into a teaching community." International Journal of Mentoring and Coaching in Education 6, no. 3 (September 4, 2017): 228–41. http://dx.doi.org/10.1108/ijmce-03-2017-0016.
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Purpose In order to prepare new members of the education profession, it is imperative that teachers enter their classrooms with the confidence, knowledge, and skills to serve their students from day one. One method for preparing such teacher candidates or student teachers is through school-based field placements during their preparation program. The purpose of this paper is to describe one example of a yearlong field placement and the mentoring relationships that emerged among participants. Design/methodology/approach This qualitative study used the following data sources: focus group interviews among the teacher candidates, focus group interviews among the mentor teachers, field placement reflections and teaching analyses composed by the teacher candidates, and interviews conducted among teacher candidates and mentor teachers. Findings Analysis of the data revealed that the yearlong field placement promoted positive mentoring relationships between teacher candidates and their classroom teachers. Specifically the following themes emerged: the “adoption” of teacher candidates into the high school classrooms, risk-taking within the classrooms, the mentor teachers’ use of constructive feedback, and collaborative “mentoring-down-the-hall.” Originality/value In recent years, various scholars have investigated the impact of field placement experiences on teacher candidates; however, these studies have lacked a detailed analysis of how such experiences impacted mentoring relationships among candidates and their mentor teachers in a collaborative setting. This paper provides an in-depth study of the perceived experiences of mentor teachers and their candidates.
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Takehara, Yusuke, Mihoko Nakagawa, Hiroaki Kobayashi, Kensuke Kakisako, Yojiro Takano, Junichi Seki, Shoji Shimada, et al. "A technique for constructing diverting loop ileostomy to prevent outlet obstruction after rectal resection and total colectomy: a retrospective single-center study." Surgery Today 52, no. 4 (October 24, 2021): 587–94. http://dx.doi.org/10.1007/s00595-021-02381-8.
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Abstract Purpose Preventing outlet obstruction associated with a diverting stoma is important. Previously, we constructed a diverting loop ileostomy with the proximal limb of the small intestine on the caudal side, namely the oral inferior (OI) method. However, to address the issue of twisting and stenosis of the small intestine, we recently constructed a diverting loop ileostomy with the proximal limb on the cranial side, namely the oral superior (OS) method. We compared the incidence of outlet obstruction between the two methods. Methods The subjects of this retrospective study were 133 patients who underwent colorectal resection or total colectomy, with D2 or more lymph node dissection and diverting loop ileostomy construction, between April, 2001 and December, 2018, at our hospital. The OI method was performed in 54 patients and the OS method was performed in 79 patients. Results In the OS group, a history of laparotomy, neoadjuvant therapy, clinical stage III, and the use of anti-adhesion materials were more common, whereas blood loss and the incidence of outlet obstruction were significantly lower. Multivariate analysis identified only OS placement as a significant factor for reducing the incidence of outlet obstruction. Conclusion When constructing a diverting loop ileostomy, placing the proximal limb on the cranial side is important.
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Lulich, Jody P. "Evaluation of Temporary Urethral Stents in the Management of Malignant and Nonmalignant Urethral Diseases in Dogs." Veterinary Sciences 9, no. 2 (February 1, 2022): 63. http://dx.doi.org/10.3390/vetsci9020063.
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Urethral stent placement is a minimally invasive interventional procedure commonly performed by specialists to alleviate urethral obstruction. However, the availability of urethral stents is limited by their high cost and the need for special equipment. The aim of this retrospective study was to describe the construction and placement of an inexpensive temporary urethral stent and to report on its outcome in managing dogs with naturally occurring urethral disease. Temporary stents were placed in the urethra of 17 dogs with malignant and nonmalignant urethral pathologies. The most common indication for temporary stent placement was urethral obstruction. In this population, urethral patency was restored in all dogs. The most frequently reported complication was urinary incontinence. To manage this complication, dogs were diapered. Temporary urethral stents served as a durable and inexpensive alternative to expanding metallic stents. Because temporary stents were constructed from readily available materials and inserted without special equipment, practitioners capable of catheterizing the urethra can insert them on demand.
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Yadav, Neeraj, Neda Sadeghi, and Julian Kang. "On-Body Placement of Wearable Safety Promotion Devices Based on Wireless Communication for Construction Workers-on-Foot: State-of-the-Art Review." Sensors 22, no. 9 (April 20, 2022): 3134. http://dx.doi.org/10.3390/s22093134.
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High auditory noise levels and limited visibility are often considered among the main factors that hinder seamless communication on construction sites. Many previous research studies have leveraged technology to overcome these obstacles and communicate using the hearing, sight and touch senses. However, the technological efficacy does not secure the users’ perceptivity of the wireless communication devices. Statistical data regarding the number of fatal accidents on construction sites have remained steady despite regular efforts. This study analyzed prior research on wearable safety promotion devices for personnel that move around the jobsite on foot. A seven-point checklist was utilized to shortlist prior studies (2005–2021) attempting to provide safety information wirelessly to the construction workers-on-foot. The reasoning behind various on-body placements was investigated along with the information conveyed using the three communication modalities. A novel communication network is also introduced to visualize the technical details. Lastly, limitations and future recommendations have been presented to gain insights about the factors that might affect the placement of the wearable safety promotion devices.
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Zeng, De Rong, and Yin Ren. "Research on Loading Model of Bracket in Multiple Mass Concrete Placement." Advanced Materials Research 671-674 (March 2013): 996–1001. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.996.
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Parametric design language in finite element analysis software ANSYS is adopted to establish the analysis model in the construction of the 0# block of a rigid frame bridge on the pier bracket in different times, simulating the placing process of the 0# block of this bridge with three times, and analyzing and understanding the deformation and stress distribution of the bracket and 0# block during each placement of the 0# block. The load participation coefficient of the concrete placed in the 0# block in subsequent 0# block construction is obtained by the analysis and comparison of the stresses of the bracket’s longitudinal beam in the 0# block placed in one time and the 0# block placed in different times. In the meantime, the numerical calculation is proved to be reliable and correct based on the calculation of multiple software programs and the comparison of field test data. These conclusions are meaningful for the design of the bracket for multiple mass 0# block placements, load calculation, and 0# block construction monitoring.
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Chen, Peng, and Xiaobin Wu. "Investigations on the Dynamic Response of Adjacent Buildings Connected by Viscous Dampers." Buildings 12, no. 9 (September 17, 2022): 1480. http://dx.doi.org/10.3390/buildings12091480.
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This paper investigates the seismic performance of two adjacent buildings connected by viscous dampers. Three types of damper placement are discussed, including installing dampers within a single building, connecting two buildings at the same floor level, and connecting two buildings at the inter-story level. Analytical models are established to consider various dynamic properties of the adjacent buildings, and the theoretical solutions are obtained, including the transmissibility curves, additional modal damping, and input energy under the seismic design spectrum. Time history analyses of an engineering project are performed with different damper placements. Different numerical models are compared for frequently and rarely occurred earthquakes. The seismic mitigation effect is discussed with regard to the story drift reduction rate and dynamic energy. Theoretical and numerical results demonstrate that the connecting dampers provide added modal damping while causing the coupled response. As a result, it is less efficient than traditional ways of placement within a building. Furthermore, the connecting dampers significantly increase the reaction of the floors without installed dampers. When designing dampers to connect the adjacent buildings, careful engineering calculations should be made.
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ELsyad, Moustafa Abdou, Ahmed Abd El Ghany Kabil, and Nesreen El Mekawy. "Effect of Implant Position and Edentulous Span Length on Stresses Around Implants Assisting Claspless Distal Extension Partial Overdentures: An In Vitro Study." Journal of Oral Implantology 43, no. 2 (April 1, 2017): 100–106. http://dx.doi.org/10.1563/aaid-joi-d-16-00075.
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The aim of this in vitro study was to evaluate the effect of implant position and edentulous span length on stresses around implants assisting claspless distal extension partial overdentures. Four bilateral mandibular distal extension acrylic models were constructed. Two implants were inserted in the distal extension ridges parallel to each other and perpendicular to the ridges. Based on the implant position, models were categorized into two groups: Group I, mesial implants position and Group II, distal implant position. Each group was subdivided into 2 subgroups according to the length of edentulous span: Subgroup a, long span and Subgroup b, short span. Four claspless partial overdentures were fabricated on the models and retained to the implants with ball-and-socket attachments. Three strain gauges were cemented to the acrylic resin at buccal, lingual, and distal sides of each implant. Static unilateral vertical load of 60N was applied in the central fossae of the first molar, and peri-implant stresses were measured on loading and nonloading sides. Distal implant placements recorded significantly higher peri-implant stresses than did mesial implant placements. Long saddle recorded significantly higher stresses than did short saddle. The greatest peri-implant stresses were recorded with distal placement and long saddle at the loading side. At loading and nonloading sides, the mesial placement with a short saddle recorded the lowest strain. For mandibular distal extension partial overdentures, a mesially placed implant combined with short saddle may be preferable to a distally placed implant combined with long saddle, as the former was associated with reduced peri-implant stresses.
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Zhong, Xi, Minquan Cheng, and Jing Jiang. "Placement Delivery Array Based on Concatenating Construction." IEEE Communications Letters 24, no. 6 (June 2020): 1216–20. http://dx.doi.org/10.1109/lcomm.2020.2981071.
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Stewart, William S., and C. B. Tatum. "Segmental Placement of Renton Outfall: Construction Innovation." Journal of Construction Engineering and Management 114, no. 3 (March 1988): 390–407. http://dx.doi.org/10.1061/(asce)0733-9364(1988)114:3(390).
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Yuan, Xinxing, Fernando Moreu, and Maryam Hojati. "Cost-Effective Inspection of Rebar Spacing and Clearance Using RGB-D Sensors." Sustainability 13, no. 22 (November 12, 2021): 12509. http://dx.doi.org/10.3390/su132212509.
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The quality assurance of constructing reinforced concrete (RC) structures in compliance with their design plays a key role in the durability, serviceability, and sustainability of the built RC elements. One area of concern in the quality control of constructing RC structures is examining the position and dimension of the rebars before pouring fresh concrete. Currently, this is accomplished by visual inspection and individually by hand with limited time available between construction stages. Over the past decades, structural health and monitoring during the construction period has applied remote sensing technologies. However, little research has focused on the use of such technologies to inspect and evaluate rebar placement prior to concrete pouring as quality control. In this study we develop an algorithm that facilitates inspecting the positions of rebars and the cover of concrete using a new-generation low-cost RGB-D sensor to find incorrect rebar placement. The proposed method is evaluated using a typical 5 × 5 two-layer rebar cage in the laboratory by comparing the proposed technique with traditional inspection methods. The results show that the RGB-D sensor can achieve cost-effective inspection for rebar spacing and clearance with an acceptable tolerance. The evaluation of rebar spacing results shows that the maximum standard deviation for rebar spacing is 0.34 inch (8.64 mm) between longitudinal rebar 2 and 3, which is the same as the rebar construction and traditional tape measurement results. The concrete cover estimation results show that the maximum standard deviation for rebar cage concrete cover is 0.19 inch (4.83 mm) for longitudinal rebar 3. The issues of new RGB-D sensor scan settings and the test results will be helpful for practitioners in improving construction quality.
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Lane, Becca, and Tom Kazmierowski. "Implementation of Cold In-Place Recycling with Expanded Asphalt Technology in Canada." Transportation Research Record: Journal of the Transportation Research Board 1905, no. 1 (January 2005): 17–24. http://dx.doi.org/10.1177/0361198105190500102.
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Cold in-place recycling (CIR) is a pavement rehabilitation method that processes an existing hot-mix pavement, sizes it, mixes in additional asphalt cement, and lays it back down without off-site hauling and processing. The added asphalt cement is typically emulsified asphalt. A recent development in CIR technology is the use of expanded (foamed) asphalt rather than emulsified asphalt to bind the mix. This combination of CIR and expanded asphalt technologies is termed cold in-place recycled expanded asphalt mix (CIREAM). The Ministry of Transportation Ontario (MTO) constructed a CIREAM trial section on Highway 7 in July 2003. The 5-km CIREAM trial section was constructed adjacent to an 8-km section on which conventional CIR was performed. CIREAM placement resulted in a smooth, hard, uniform surface that provided an excellent platform for paving operations. The CIREAM placement progressed in a continuous and efficient manner, with 5 km placed over a 3-day period. Indirect tensile strength testing was carried out on both materials during construction. Falling weight deflectometer (FWD) testing and evaluation of pavement roughness and rutting by the use of MTO's automatic road analyzer (ARAN) were carried out. Resilient modulus testing of core samples of the CIR material and CIREAM was also carried out. The results of the FWD, ARAN, and resilient modulus tests indicated that the CIR and CIREAM pavements were performing similarly. A field review 1 year after construction showed no discernible distortion, rutting, or cracking. On the basis of short-term results, CIREAM appears to be an acceptable in-place recycling and rehabilitation strategy that provides an economical alternative to conventional CIR, reduces curing time, and extends the construction season.
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McGill, Sean P., Brian D. Harris, Brian C. McFall, Douglas R. Krafft, Rachel L. Bain, Nicholas R. Olsen, Ian W. Conery, and Monica A. Chasten. "Morphological Analysis of a Nearshore Nourishment along the Atlantic Coast of New Jersey, USA." Journal of Marine Science and Engineering 10, no. 11 (November 2, 2022): 1622. http://dx.doi.org/10.3390/jmse10111622.
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Nearshore nourishment is a common coastal flood risk management technique that can be constructed beneficially by using dredged sediment from navigation channels. A nearshore nourishment project was completed during the summer of 2021 in Harvey Cedars, NJ, USA, with 67,500 m3 of dredged sediment from Barnegat Inlet placed along approximately 450 m of beach in a depth of 3–4 m. In situ instruments were installed to monitor hydrodynamic conditions before and after dredged material placement, and nine topographic and bathymetric surveys were conducted to monitor nearshore morphological response to the nourishment. Shoreline location was extracted from satellite imagery using CoastSat software to compare historical trends to the shoreline response after construction. Seven months after construction, 40% of the nearshore nourishment was transported from the initial footprint and the centroid of the nourishment migrated towards shore and alongshore (north). The sheltering capacity of the nearshore berm appears to have captured an additional 58% of the placed volume from the longshore transport system and the beach width onshore of the placement increased by 10.9 m. Measured data, satellite imagery analysis, and rapid predictions all indicate that the nearshore nourishment at Harvey Cedars had a positive impact on the adjacent beach.
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SKOBLICKAYA, Yulia A., and Anastasia A. SHEREMET. "The Architectural and Planning Organization of the Closed Complexes for Winter Sports." Journal of Environmental Management and Tourism 10, no. 5 (November 8, 2019): 1112. http://dx.doi.org/10.14505//jemt.v10.5(37).18.
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This article is devoted to comprehensive study of architectural-planning and functional organization of indoor complexes for winter sports located in major cities. Design and construction of the described facilities will lead to even greater popularization of winter sports and will allow people to regularly visit skating rinks, ski trails, etc. The relevance of constructing such complexes in the largest cities of Russia is considered. A comprehensive analysis of the implemented, designed and under construction indoor complexes for winter sports in the world has been carried out. The article formulates the main recommendations regarding the location of the complexes in the structure of the major cities, the sizes of designated sites, taking into account the urban situation. Taking into account the analysis of design experience, regulatory documents, population surveys, this article provides basic recommendations on the architectural and planning solution for indoor complexes for winter sports, identifies functional elements that make up their composition. Variants of placement and blocking of the main functional zones were proposed, and the areas of the main groups of premises were set taking into account the placement of these complexes in urban structure.
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Roberts, B. W., and C. W. O'Hern. "SMALL-SCALE, LOW-COST FILTERS FOR DRIP IRRIGATION SYSTEMS." HortScience 25, no. 9 (September 1990): 1103d—1103. http://dx.doi.org/10.21273/hortsci.25.9.1103d.
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Drip irrigation systems are used extensively by commercial vegetable producers. Such systems permit precise water placement and efficient water utilization. Emitters in drip irrigation lines can easily become clogged if water supplies contain solid particles. Most farm water is not suitable for drip irrigation unless filters are used to remove solid particles from the water. Small scale or part time vegetable producers often find the cost of conventional filter systems to be a substantial financial investment.A filter which is small, lightweight, and portable was designed, built, and tested. The system is constructed from standard hardware and plumbing materials that can be purchased for less than $50. Construction time is four hours or less. The filter system works well for small scale operations that require low flow rates of water.Specifications for construction, including a materials parts list and construction details will be presented.
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ON, Shemelina. "Constructing a Heavy Oil Well." Petroleum & Petrochemical Engineering Journal 6, no. 1 (2022): 1–6. http://dx.doi.org/10.23880/ppej-16000300.
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The article presents a description of the designs of wells intended for the production of high-viscosity oil. The main problems associated with the planning and deployments of architecture, construction of high-viscosity oil wells are described. World experience in well construction is presented. Vertical wells are usually used for primary cold production and cyclic steam or steam flooding processes. On the other hand, increased reservoir contact may require deviated, horizontal, or multilateral wells. In the case of steam-assisted gravity drainage (SAGD) and some solvent injection processes, the recovery process may require a well-placed pair of horizontal wells. Advanced drilling and real-time measurement technologies reviewed. Geo mechanical factors are studied when considering the implementation of any steam or thermal processes in the field. Examples of construction of multilateral wells in various combinations are shown depending on the field development strategy and for maximum reservoir drainage. The main recommendations for the placement of wells are proposed.
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Zolotozubov, D. G., S. V. Kaloshina, S. A. Sazonova, and D. A. Tatiannikov. "RATIONAL PLACEMENT OF WAREHOUSES AT THE CONSTRUCTION SITE." Construction and Geotechnics 11, no. 3 (December 15, 2020): 117–26. http://dx.doi.org/10.15593/2224-9826/2020.3.10.
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Rational construction site planning is especially important when building in cramped urban environments. This requires good training of qualified professionals. Currently, the system of higher professional education imposes new requirements on the technologies of vocational training. The introduction of interactive teaching methods and the improvement of the scientific, methodological and material and technical base are the most important stages on the way to the transition to a new level of education. This process is facilitated by practical exercises using electronic reference books and electronic simulators. As an example, the organization of the interactive form of a practical lesson "Designing temporary warehouses for a construction site" is considered. The lesson is part of the course for training specialists in the development of building master plans. The structure and organization of the lesson is described. It includes such forms of interactive teaching methods as mini-lecture, case-method, discussion. During the lesson, students actively participate in the discussion of the issues under consideration. They offer their own options for solving the tasks assigned to them. Consolidation of the acquired skills for calculating warehouse areas is carried out using an electronic simulator. The simulator allows you to optimize the required warehouse area. To do this, the simulator enters the initial data on the materials required for the construction of the facility. The ability to vary various parameters is provided. The simulator makes it easier to assimilate the studied material. The proposed simulator can also be used for practical purposes, for example, for rational planning of a construction site.
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HASSAN, MOHSEN M. D., GARY L. HOGG, and DONALD R. SMITH. "SHAPE: A construction algorithm for area placement evaluation." International Journal of Production Research 24, no. 5 (September 1986): 1283–95. http://dx.doi.org/10.1080/00207548608919803.
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Wimer, S., and I. Koren. "Analysis of strategies for constructive general block placement." IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems 7, no. 3 (March 1988): 371–77. http://dx.doi.org/10.1109/43.3170.
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Raduly-Baka, Csaba, Timo Knuutila, Mika Johnsson, and Olli S. Nevalainen. "Construction of component tapes for radial placement machines." Computers & Operations Research 37, no. 8 (August 2010): 1488–99. http://dx.doi.org/10.1016/j.cor.2009.11.005.
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Spesivtsev, Alexander Vasilievich, Vladimir Vladimirovich Lisitskiy, Sergey Vladimirovich Logunov, and Anton Mikhailovich Martynov. "SELECTION OF LOCATIONS FOR GROUND BASED OPTICAL SURVEILLANCE DEVICES BASED ON THE FUZZY PROBABILITY MODEL." SOFT MEASUREMENTS AND COMPUTING 1, no. 3 (2021): 19–30. http://dx.doi.org/10.36871/2618-9976.2021.03.003.
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When choosing the location of groundbased optical surveillance devices (NOSN), the problem arises of evaluating the suitability of a particular area of terrain or choosing the best of a number of considered ones, provided that the ability to perform professional tasks with specified characteristics is quantified. A method for solving this problem is proposed by constructing a fuzzyprobability model of a generalized (integral) indicator of the quality of NOS placements based on the knowledge and experience of experts. Such an indicator is determined by a systemically confirmed set of seven linguistic variables included in the factor space for constructing a fuzzy probability model in the form of a nonlinear polynomial expression. At the same time, the dependent variablethe ability to perform the task with the specified characteristicsindirectly determines the degree of the best placement of the NOS, taking into account its astroclimate. Practical recommendations on the choice and justification of the factor space are given, the main stages of constructing a fuzzy probability model are shown, and the degree of adequacy of calculations based on it to the actual ability to perform tasks with specified characteristics, evaluated by independent experts, for the locations of NOS in various geographical regions of the Russian Federation.
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Knop, Sabine De. "The embodied teaching of complex verbal constructions with German placement verbs and spatial prepositions." Review of Cognitive Linguistics 18, no. 1 (August 17, 2020): 131–61. http://dx.doi.org/10.1075/rcl.00054.kno.
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Abstract In recent years, foreign language pedagogy has recognized the need to focus (i) on larger meaningful sequences of words (Nattinger & DeCarrico, 1992; Wray, 2002; Ellis & Cadierno, 2009; Gonzalez Rey, 2013) and (ii) further on communicative goals (Nunan, 1991; Widdowson, 1992; Savignon, 2000). Difficulties in the learning process of a foreign language result from the conceptual and constructional differences between expressions in the native and foreign language. Teaching materials often propose a lexical approach with an unstructured set of constructed examples. With the postulate of meaningful schematic templates, Construction Grammar (CxG) has a number of assets for foreign language teaching (FLT) and learning (FLL), it allows among others to establish a structured inventory of abstract constructions with prototypical exemplars and inheritance links between the constructions’ instantiations. To be proficient in a foreign language also means to use new words in constructions. Learners can be asked to extend the use of new lexical units as slot-fillers into constructional patterns. This is exemplified with the use of German posture and placement verbs in the caused motion construction and the corresponding intransitive locative construction. But having learned a vast number of constructional templates of a language does not automatically imply that learners can produce L2-constructions and their instantiations in a creative way. Therefore, CxG must be enriched with further insights from Cognitive Linguistics which claims that conceptual categories and their linguistic expressions are the result of embodied processes (Lakoff, 1987). This chapter makes some suggestions for interactive activities which can foster ‘embodied teaching and learning’.
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Wagner, Katelyn J., John T. Whelan, Jared K. Wofford, and Karl Wette. "Template lattices for a cross-correlation search for gravitational waves from Scorpius X-1." Classical and Quantum Gravity 39, no. 7 (March 3, 2022): 075013. http://dx.doi.org/10.1088/1361-6382/ac5012.
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Abstract We describe the application of the lattice covering problem to the placement of templates in a search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1. Efficient placement of templates to cover the parameter space at a given maximum mismatch is an application of the sphere covering problem, for which an implementation is available in the LatticeTiling software library. In the case of Sco X-1, potential correlations, in both the prior uncertainty and the mismatch metric, between the orbital period and orbital phase, lead to complications in the efficient construction of the lattice. We define a shearing coordinate transformation which simultaneously minimizes both of these sources of correlation, and allows us to take advantage of the small prior orbital period uncertainty. The resulting lattices have a factor of about three fewer templates than the corresponding parameter space grids constructed by the prior straightforward method, allowing a more sensitive search at the same computing cost and maximum mismatch.
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Oskin, D. A., A. A. Gorshkov, and S. A. Klimenko. "DATA COLLECTION AND TRANSMISSION SYSTEM FOR UNMANNED VESSEL." Chronos: natural and technical sciences 6, no. 1(34) (March 3, 2021): 27–29. http://dx.doi.org/10.52013/2712-9691-34-1-5.
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The principles of construction and operation of the data collection and transmission system (DCTS) of an unmanned vessel are considered. A two-stage formulation of the problem of constructing a DCTS is proposed: the choice of methods and means of transmitting data from sensors to the data collection system, the choice of a method for transmitting data to the data collection system, the implementation of data transmission channels and, directly, the organization of data collection and storage for use in the autopilot device, implementation systems for receiving and synchronizing data and their placement in the storage system.
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Kiseleva, Elena, Olga Prytomanova, and Liudmyla Hart. "Application of optimal set partitioning theory to solving problems of artificial intelligence and pattern recognition." System research and information technologies, no. 4 (December 22, 2021): 91–101. http://dx.doi.org/10.20535/srit.2308-8893.2021.4.07.
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The paper substantiates the possibility of applying the mathematical theory of continuous problems of optimal partitioning of sets of n-dimensional Euclidean space, which belong to the non-classical problems of infinite-dimensional mathematical programming, to the solution of problems of artificial intelligence and pattern recognition. The problems of pattern recognition both in conditions of certainty and in conditions of uncertainty are formulated. A particular attention is paid to the application of methods of the theory of optimal partitioning for the construction of fuzzy Voronoi diagrams. Examples of constructing fuzzy Voronoi diagrams with the optimal placement of generating points are given.
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van der Harten, Arthur W. "Challenges in siting a highway noise barrier with constraints of cost, zoning, and wetlands management." Journal of the Acoustical Society of America 152, no. 4 (October 2022): A49. http://dx.doi.org/10.1121/10.0015501.
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A noise barrier has been planned to reduce the impact of highway noise on a private property with restrictions on construction due to wetlands management, and stringent building code requirements, with respect to cost. Using the constraints of the site and local ordinances, an application of a genetic algorithm was designed in order to find the optimal barrier placement that complied with all site constraints. Fitness criteria were developed according to the area of the constructed barrier, as well as the amount of attenuation provided according to a Maekawa based screen attenuation calculation determined in a 3-D model of the terrain.
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Hu, We, Denghua Zhong, Binping Wu, and Zheng Li. "CONSTRUCTION PHASE ORIENTED DYNAMIC SIMULATION: TAKING RCC DAM PLACEMENT PROCESS AS AN EXAMPLE." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 25, no. 7 (July 10, 2019): 654–72. http://dx.doi.org/10.3846/jcem.2019.7948.
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Construction simulation has been widely applied in schedule analysis. However, traditional simulation is based on static models built in the planning or design phase, which focuses on overall project-level schedule analysis. To provide activity-level simulation for on-site schedule management, a construction phase oriented dynamic simulation method is proposed, which takes roller compacted concrete (RCC) dam placement process as an example. Considering various innerlayer and inter-layer activities and different construction organization modes, a detailed placement process simulation model is built. Based on construction data collected by real-time monitoring, a construction activity modeling method is given. Additionally, Dirichlet process mixture (DPM) models are applied for simulation parameter updates, which endows density estimation with considerable flexibility and robustness. A fast inference algorithm is also proposed to realize the fast posterior computation of DPM models. The proposed method is tested by an RCC dam project in southwest China. The results show that the proposed method can reflect the dynamic features of the actual placement process in the construction phase and provide accurate schedule predictions for on-site construction management.
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Karimi, Najia, and Roozbeh Sarem. "Seismic response of multi-storey building using different vibration technique-A review." International Journal of Innovative Research and Scientific Studies 4, no. 1 (February 8, 2021): 1–13. http://dx.doi.org/10.53894/ijirss.v4i1.49.
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This review presents the high performance of failure-resistant structural device system for the sustainable and flexible buildings. Firstly, the motivation and basic principles as well as methodology of the developing device system are explicitly illustrated. Then, the structural detail and seismic response of base isolation systems, namely, lead Rubber Bearing (LRB), HDLRB isolators, viscous damper (Base Isolation with in-Parallel Dissipation system: BIPD) and sliding bearing isolator (Base Isolation with in-Series Sliding system: BISS) are summarized. The theoretical and experimental study results was shown that all four types of isolator system can be able to minimize damage after seismic an earthquake to the structural system. The viscous damper devices and energy dissipate as well as viscoelastic and fluid viscous dampening can be able to enhance the energy dissipation capacity of structural system under an earthquake loading. A placement of L shape, shear walls at the structural configuration plan is given more efficient behavior under seismic load than all other placements of shear walls at the building’s configuration. Many numerical specimens of tunnel form buildings were constructed and modelled to analyze and interpreted the dynamic and static cyclic response of structures against seismic force. The deformation of the dynamic response of tunnel form building was smaller by using Carbon Fiber Reinforced Polymer (CFRP) repairing and retrofitting method. Contradictory, the usage of base isolations, energy dissipation devices, shear walls and tunnel form buildings can enhance the efficiency of structures under seismic force by reducing the economic cost saving in their construction.