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Relevant bibliographies by topics / Geometry of the rooms

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Academic literature on the topic 'Geometry of the rooms'

Author: Grafiati

Published: 28 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Geometry of the rooms"

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Bassier, M., R. Klein, B. Van Genechten, and M. Vergauwen. "IFCWALL RECONSTRUCTION FROM UNSTRUCTURED POINT CLOUDS." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-2 (May 28, 2018): 33–39. http://dx.doi.org/10.5194/isprs-annals-iv-2-33-2018.

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The automated reconstruction of Building Information Modeling (BIM) objects from point cloud data is still ongoing research. A key aspect is the creation of accurate wall geometry as it forms the basis for further reconstruction of objects in a BIM. After segmenting and classifying the initial point cloud, the labelled segments are processed and the wall topology is reconstructed. However, the preocedure is challenging due to noise, occlusions and the complexity of the input data.<br>In this work, a method is presented to automatically reconstruct consistent wall geometry from point clouds. More specifically, the use of room information is proposed to aid the wall topology creation. First, a set of partial walls is constructed based on classified planar primitives. Next, the rooms are identified using the retrieved wall information along with the floors and ceilings. The wall topology is computed by the intersection of the partial walls conditioned on the room information. The final wall geometry is defined by creating IfcWallStandardCase objects conform the IFC4 standard. The result is a set of walls according to the as-built conditions of a building. The experiments prove that the used method is a reliable framework for wall reconstruction from unstructured point cloud data. Also, the implementation of room information reduces the rate of false positives for the wall topology. Given the walls, ceilings and floors, 94% of the rooms is correctly identified. A key advantage of the proposed method is that it deals with complex rooms and is not bound to single storeys.

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Olechowska, Marcelina, Artur Nowoświat, Jan Ślusarek, and Mateusz Latawiec. "The influence of the distribution of sound absorbing materials on the estimation of reverberation time in rooms." E3S Web of Conferences 49 (2018): 00078. http://dx.doi.org/10.1051/e3sconf/20184900078.

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Reverberation time in rooms depends on many factors, e.g. cubature, surface of envelopes, sound absorption coefficient of materials used for the construction of the envelopes, geometry of rooms or the distribution of sound absorbing materials. The arrangement of sound absorbing materials in rooms has an impact on the dispersion of acoustic field, yet theoretical calculation models do not take into account this impact. According to these models, regardless of the arrangement of sound absorbing materials, the reverberation time in a room will remain unchanged. The present paper investigates the above problem by means of computer simulations. For the needs of the simulation, three rooms with different dimensions were adopted, i.e. type 'p' - a cuboidal room with a square base, type 'd' - a cuboidal room (with one side of the 'p' room lengthened), type 'w' - a cuboidal room (with the height of the room lengthened 'p'). During the simulation, the way of acoustic field dispersion was being changed and its influence on the reverberation time in the rooms was being determined. The authors investigated two situations. The first one involved a non-dampened room, in which the sound absorbing material was being arranged differently. The second one involved a welldampened room, and the dispersion of sound field was analyzed depending on the location of the reflecting material.

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Skrzypkowski, Krzysztof. "The Influence of Room and Pillar Method Geometry on the Deposit Utilization Rate and Rock Bolt Load." Energies 12, no. 24 (December 13, 2019): 4770. http://dx.doi.org/10.3390/en12244770.

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In this article, a model of ore deposit in form of a lense carried out in the MineScape program, is presented. The lense had a thickness of 30 m, length along the strike 200 m, and the depth buried was for 80 m to 110 m below the surface. In the first layer, counting from the lowest level, a room and pillar method with variable geometry was designed. The width and length dimensions for rooms and pillars were: 4 m, 5 m and 6 m, respectively. For the selected part of the deposit, three variants of the system with variable geometry of rooms and pillars were designed, for which the deposit utilization coefficient was determined. The next stage of the research was to determine the influence of the geometry of the pillars and rooms on the range of the rock destruction zone around room excavations. For this purpose, numerical calculations using the three-dimensional Examine 3D program, based on the boundary element method, were made. The results of numerical tests were used to calculate the load of the rock bolt support, which is currently used in the zinc and lead underground mine “Olkusz-Pomorzany” in Poland. Currently in the mine, the bolt spacing is 1 m × 1 m, and the technology for fixing the bolt rod is based on resin cartridges that completely fill the bolt hole. In order to spread the spacing of the rock bolt support and to apply segmental fixing of the bolt rod, in the laboratory tests, rock bolt supports with increased strength were tested. Based on the results obtained, it was found that the rock bolt can be installed segmentally, using a cement grout, and its spacing can be increased to 2 m.

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Khabaz, Rahim. "Estimation of scattering contribution in the calibration of neutron devices with radionuclide sources in rooms of different sizes." Nuclear Technology and Radiation Protection 30, no. 1 (2015): 47–54. http://dx.doi.org/10.2298/ntrp1501047k.

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Calibrations of neutron devices used in area monitoring are often performed by radionuclide neutron sources. Device readings increase due to neutrons scattered by the surroundings and the air. The influence of said scattering effects have been investigated in this paper by performing Monte Carlo simulations for ten different radionuclide neutron sources inside several sizes of concrete wall spherical rooms (Rsp = 200 to 1500 cm). In order to obtain the parameters that relate the additional contribution from scattered neutrons, calculations using a polynomial fit model were evaluated. Obtained results show that the contribution of scattering is roughly independent of the geometric shape of the calibration room. The parameter that relates the room-return scattering has been fitted in terms of the spherical room radius, so as to reasonably accurately estimate the scattering value for each radionuclide neutron source in any geometry of the calibration room.

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Ferreira, T., I. Bournas, and M.-C. Dubois. "Effect of atrium geometry and reflectance on daylighting in adjacent rooms." Journal of Physics: Conference Series 1343 (November 2019): 012167. http://dx.doi.org/10.1088/1742-6596/1343/1/012167.

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de Souza, Mauricy Cesar R., and Samir N. Y. Gerges. "Prediction of Sound Level in Rooms and Experimental Validation." Building Acoustics 4, no. 2 (June 1997): 117–35. http://dx.doi.org/10.1177/1351010x9700400204.

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Traditional Sabine equations still are used for factories or offices where diffuse sound fields rarely occur and prediction can be inaccurate. More recently, methods based on geometric acoustics have been developed which require large computing time and which demand better defined input data. A problem, often encountered, is how to include input data which is appropriate, accurate and relatively easy to obtain. Three acoustic models of a furnished room were created: a diffuse field, an image source and a ray tracing model. The initial values of absorption coefficient and sound power level were obtained by standard measurements and the sound propagation SP was predicted and compared with measurement for each model. Then, the models were calibrated by altering the input parameters in order to minimise the difference between predicted and measured values. Sound pressure level due to two sources was also predicted and compared with measurement. For the room studied, the precision of the predictions, after calibration, is similar for the three models considered, with an average difference between simulated and measured values of less than 2 dB. Without the calibration procedure, the ray-tracing model gave the most precise first estimate. The diffuse and image source models needed significant modification of the input data to obtain a similar precision. The sound field in the room chosen for this study was nearly diffuse and simulation, based on geometric acoustics, did not offer clear advantages. However, this will not be the case for rooms with more complicated geometrical and acoustic characteristics such as in factories and offices. In addition, the image source model will not be appropriate for internal fittings which are much more complex than in the present study and an appropriate estimate of the scattering cross-section is problematical. In the ray tracing model, this problem is circumvented by incorporating the fittings as part of the geometry of the room.

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Cardu, Marilena, Sergio Dipietromaria, and Pierpaolo Oreste. "Sub-Level Stoping in an Underground Limestone Quarry: An Analysis of the State of Stress in an Evolutionary Scenario." Archives of Mining Sciences 61, no. 1 (April 1, 2016): 199–216. http://dx.doi.org/10.1515/amsc-2016-0015.

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Abstract The aim of this study was to evaluate the state of stress of a „voids-pillar“ structure excavated by means of the sub-level stoping method in an underground limestone quarry near Bergamo (Italy). Both the current structure of the quarry (i.e. the rooms exploited till now) and a possible future scenario were analysed using the (FDM) FLAC 2D code. The quarry has been in operation since 1927; at present, exploitation is carried out underground via the sub-level stoping method. Exploitation involves two levels, with 5 rooms on the upper level and 9 rooms on the lower level. After analysing data obtained from laboratory and in situ tests carried out on rock samples and natural discontinuities, the geomechanical properties of the medium, knowledge of which is essential in order to establish the parameters that must be included in the numerical model, were evaluated. The implementation of three numerical models made it possible to study both the present conditions of quarry exploitation and the evolution of the exploited rooms, as well as a possible expansion involving a third level of rooms. Using the results obtained regarding the stress-strain present in the pillars, a potential change in room geometry was proposed aimed at reducing the stress state inside the pillars, decreasing plasticity and increasing overall quarry safety.

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Cai, Yuanzhi, and Lei Fan. "An Efficient Approach to Automatic Construction of 3D Watertight Geometry of Buildings Using Point Clouds." Remote Sensing 13, no. 10 (May 17, 2021): 1947. http://dx.doi.org/10.3390/rs13101947.

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Recent years have witnessed an increasing use of 3D models in general and 3D geometric models specifically of built environment for various applications, owing to the advancement of mapping techniques for accurate 3D information. Depending on the application scenarios, there exist various types of approaches to automate the construction of 3D building geometry. However, in those studies, less attention has been paid to watertight geometries derived from point cloud data, which are of use to the management and the simulations of building energy. To this end, an efficient reconstruction approach was introduced in this study and involves the following key steps. The point cloud data are first voxelised for the ray-casting analysis to obtain the 3D indoor space. By projecting it onto a horizontal plane, an image representing the indoor area is obtained and is used for the room segmentation. The 2D boundary of each room candidate is extracted using new grammar rules and is extruded using the room height to generate 3D models of individual room candidates. The room connection analyses are applied to the individual models obtained to determine the locations of doors and the topological relations between adjacent room candidates for forming an integrated and watertight geometric model. The approach proposed was tested using the point cloud data representing six building sites of distinct spatial confirmations of rooms, corridors and openings. The experimental results showed that accurate watertight building geometries were successfully created. The average differences between the point cloud data and the geometric models obtained were found to range from 12 to 21 mm. The maximum computation time taken was less than 5 min for the point cloud of approximately 469 million data points, more efficient than the typical reconstruction methods in the literature.

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Granzotto, Nicola, and Edoardo Alessio Piana. "Evaluation Method for Façade Acoustic Insulation for a Corner Room: Discussion on the Results Obtained as a Function of the Source Position." Applied Sciences 10, no. 21 (October 22, 2020): 7434. http://dx.doi.org/10.3390/app10217434.

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The appropriate acoustic insulation project of building façades is of importance for the design of highly comfortable living environments. In some countries, national regulations require maximum noise levels inside rooms, or minimum sound insulation limits, to be respected. The acoustic insulation design of a façade is usually performed according to the ISO 12354-3 standard, which presents a calculation method based on the geometry of the room, the shape of the façade, the areas and the acoustic performances of the individual elements. The prescribed limits must be experimentally verified according to methods derived from international standards. However, the current versions of such standards do not provide details on how to perform the measurements and the calculation of the sound insulation for corner rooms. An important remark is that, depending on the position of the sound source used for the measurements, different results of the standardized sound insulation are obtained. This article proposes a new method for calculating the façade insulation of corner rooms by introducing the acoustic attenuation due to the diffraction of the corner and the distance of the sound source from the façades, estimated through simulations and experimentally validated.

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Wang, Lin, and Weimin Mou. "Effect of room size on geometry and features cue preference during reorientation: Modulating encoding strength or cue weighting." Quarterly Journal of Experimental Psychology 73, no. 2 (September 5, 2019): 225–38. http://dx.doi.org/10.1177/1747021819872159.

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Three experiments investigated how the room size affects preferential use of geometric and non-geometric cues during reorientation inside a room. We hypothesised that room size may affect preferential use of geometric and non-geometric cues by affecting the encoding of the cues (the encoding hypothesis), the retrieval of the cues (the retrieval hypothesis), or both the encoding and retrieval of the cues (the encoding-plus-retrieval hypothesis). In immersive virtual rectangular rooms, participants learned objects’ locations with respect to geometric (room shape) and non-geometric cues (features on walls or isolated objects). During the test, participants localised objects with the geometric cue only, non-geometric cues only, or both. The two cues were placed at the original locations or displaced relative to each other (conflicting cues) when both were presented at testing. We manipulated the room size between participants within each experiment. The results showed that the room size affected cue preference using conflicting cues but did not affect response accuracy using single cues at testing. These results support the retrieval hypothesis. The results were discussed in terms of the effects of cue salience and stability on cue interaction in reorientation.

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Dissertations / Theses on the topic "Geometry of the rooms"

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Abells, Diana. "My Room." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429809510.

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Rybak, Charles A. "Human Rooms." Cincinnati, Ohio : University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1052328743.

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Cassidy, Oliver. "Common Rooms." Thesis, KTH, Arkitektur, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276824.

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Sweden is the most individual society in Europe: more than half its population live alone and In Stockholm this figure is as high as 60%. As people increasingly live alone in typical apartments, the spatial requirements per person rises. Spaces such as kitchens, bathrooms and living spaces are required separately for each resident; appliances such as fridges, washing machines and hobs are owned individually. Not only is this a spatial strain, it is also an economic and environmental issue. The upkeep and production of both the spaces and their furnishings carries an ecological and financial load. In addition, each individual is burdened with the maintenance of these spaces and objects; it is an unnecessary personal labour. Common Rooms proposes to re-imagine the historically prevalent and varied typology of the residential hotel, as a solution to the spatially greedy and exclusive residences currently on offer. Many small, individual dwelling spaces with shared facilities create an economy of scale that in turn allow for common luxuries. Economic burdens are shared, time is freed, and ecological damage is limited.

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Andreianu, Ioana Lucia. "Urban Rooms." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32834.

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This thesis started as an exploration of spaces created with subtle light changes in atmosphere, spaces created for the sole purpose of lingering in, of relaxing in, during a hot summer day, winter or in a busy day, when all you want to do is get away from it all in a soul-comforting place. Soon after, I realized that these spaces should have no other purpose than their simple existence, thus the idea of pavilions seemed to be the best fit for such a description. After locating the pavilions in Ramnicu-Valcea, Romania, through the exploration of the place memory, the present conditions and materials, the project started to take shape. The final project became a room within an urban setting. The pavilions, a series of five rooms connected by shape and materiality into two buildings, created in between a new plaza, a new urban space, a sixth room.
Master of Architecture

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Maurer, Christie. "Open Rooms." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4217.

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Bond, Easom J. "House of many rooms." Thesis, Virginia Polytechnic Institute and State University, 1994. http://hdl.handle.net/10919/53367.

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This thesis participates in the architectural construct of INSIDE and OUTSIDE. By means of a house with many rooms, the extremes of an inner, personal architecture contrast the extremes of an outer, public architecture. Each room is an inner architecture of closure and definition. While an outer architecture of openness and expanse surrounds them. One room is a bathroom of concentric cylinders. Another is a rectangular box with an upstairs bed, while another is a large cube with a smaller cube for a bed. Each room presents an inner architecture of almost crystalline purity. And each closes themself off from the others. Despite their particularity, these rooms gather, while black and white steel panels unite and define the outer architecture of house, barely. A ring of stairways angles across the steel matrix on its way to a rooftop patio, allowing the surrounding forest to creep in. The outer architecture of house begins to dissolve into the forest, leaving only the inner architecture of room in tact. Only the closed, inner architecture, so personal that we do not share, resists the diffusion. Only the inner architecture of identity maintains its integrity. Only an inner architecture can contrast the outer architecture. The lines drawn between an inner and outer architecture parallels those between public / private and individual / community. This thesis project draws the line between room and house, choosing to allow house to dissolve into the outer architecture of the surrounding forest while room assumes the role of an inner architecture. One conclusion of this thesis is that house deserves closure as well. Architecture is responsible for both the inner and outer extremes of the inhabited world. The inner architecture demands closure and definition. The outer architecture demands openness and expanse.
Master of Architecture

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Hopper, Hugh. "Reverberation enhancement for small rooms." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348944/.

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Reverberation enhancement is a technology which allows the reverberation time of a room to be increased through the use of an electronic system. These systems have traditionally been applied to improve the acoustics of large concert halls but the technology can also be used in smaller spaces with several possible applications. Previous uses of reverberation enhancement in small rooms have largely consisted of direct transplants of systems designed for large concert halls. This work investigates the complications which arise when using reverberation enhancement in a small room due to the differences in the acoustic properties of the space and also the restriction on the channel count of the system due to physical constraints. The first part of this work deals with increasing the resultant reverberation time of the room without requiring additional system channels. This is achieved through the use of processing within the system. Two methods have been investigated. The first extends the resultant reverberation time without changing the feedback gain. The processing used for this purpose is either electronic reverberation or simple delay, both of which have been shown to allow significant increases in resultant reverberation time. These changes can be predicted accurately using diffuse field theory. The other method uses time-varying processing to increase the maximum stable feedback gain. This has been shown to allow increases in resultant reverberation time but also causes undesirable artefacts which limit the usability of this technique. The second part of this work focuses on the differences in the acoustic properties of small rooms and especially the ways in which these rooms differ from a diffuse field. This includes the consideration of the modal properties of the room at low frequency which are insignificant in a large room. It has been shown that the spatial and frequency variations of the room at low frequency can be reduced through numerical optimisation of the processing within the reverberation enhancement system. Finally, the diffusion of the sound field and the early energy in the impulse response have been considered. It is shown that restrictions on the resultant reverberation time may be required in order to create a subjectively acceptable acoustic response. Overall, this work has shown that by accounting for the properties of the room, excellent performance of the system can be achieved.

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Russell, Pamela J. "Special education administrators' perceptions of mandatory comparability of special education rooms to regular education rooms /." Search for this dissertation online, 2006. http://wwwlib.umi.com/cr/ksu/main.

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Mowlabocus, Sharif. "Chat rooms and back rooms : same-sex desire, cyberspace, and contemporary British gay male sub-culture." Thesis, University of Sussex, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429874.

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Hillert, Freja. "What Changes with Features in Rooms?" Thesis, KTH, Arkitektur, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146293.

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In this project the aim was to see if there was a way to approach features and qualities which seemed detached of the function, in order to let such features and qualities be used in a variety of programs and functions in design. I wanted to see if this might be possible to achieve and in that case how this would affect the design. I tried to fulfill the intention of the project by making an attempt to lower the influence of the program on the design. In the project the rooms of the design were shown in different states, how the rooms changed and how they were altered when programs were applied to them. I also tried to reflect on how that affected the suggested features and qualities that were assumed to be outside the function. The project was not made for a specific site but Stockholm has been the place that the project was intended to relate to.
Intentionen med det här projektet var att försöka hitta ett sätt att relatera till egenskaper och kvalitéer vilka tycktes vara fristående från funktionen, som gjorde att sådana egenskaper och kvalitéer kunde användas för olika program och funktioner i design. Jag ville försöka se om det fanns ett sätt att göra detta och i så fall hur det skulle påverka designen. Jag försökte uppnå intentionen av projektet genom att minska programmets inflytande på de rum som ritades i projektet. I projektet visas de olika rummen från projektet i olika stadier samt hur rummen förändrades och anpassades till programmen som applicerades i dem. Jag försökte också reflektera över hur de förändringar som gjordes påverkade det som antogs vara egenskaper och kvalitéer utanför funktionen. Projektets design och rum planerades inte för en specifik plats men jag har försökt att relatera projektet till Stockholm som stad.

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Books on the topic "Geometry of the rooms"

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Austin, Philip R. Encyclopedia of clean rooms/white rooms/sterile rooms. Livonia: Contamination Control Seminars, 1991.

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Whyte, Hamish. Rooms. Leek, Staffordshire: Johnston Green, 1986.

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Joan Fontcuberta, Paul den Hollander, Pierre Houcment, Max Kellenberer, Reza Khatir, Jashi Klein, Till Leeser, Paul de Nooijer, Pam, Martin Parr, Bernard Plossu, Wojciech Prazmowski , Jan Saudek, Ava Vargas, Christian Vogt. Rooms. Zürich / Locarno: B R Khatir Editori, 1990.

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Featherston, Dan. Rooms. San Diego, CA: Paper Brain Press, 1998.

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Whyte, Hamish. Rooms. Portree: Aquila, 1985.

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Rooms. London: Hodder, 2015.

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Entertainment rooms: Theaters, bars, & game rooms. Atglen, PA: Schiffer Publishing Ltd., 2010.

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Bragg, Melvyn. Crystal rooms. London: Hodder & Stoughton, 1992.

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Wright rooms. Glasgow, Scotland: Saraband, 2004.

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The rooms. Dublin 2: Hot Press Books, 2005.

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Book chapters on the topic "Geometry of the rooms"

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Tan, Xuehou. "An Optimal Algorithm for the 1-Searchability of Polygonal Rooms." In Discrete and Computational Geometry, 174–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11589440_18.

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Mazzola, Guerino. "Algebraic Geometry." In The Topos of Music IV: Roots, 1411–17. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64495-0_6.

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Basu, Saugata, Richard Pollack, and Marie-Francoise Roy. "Real Roots." In Algorithms in Real Algebraic Geometry, 321–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05355-3_11.

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Edelsbrunner, Herbert. "Roots of Geometry and Topology." In A Short Course in Computational Geometry and Topology, 1–6. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05957-0_1.

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Kaneyuki, Soji. "Signatures of Roots and a New Characterization of Causal Symmetric Spaces." In Topics in Geometry, 213–29. Boston, MA: Birkhäuser Boston, 1996. http://dx.doi.org/10.1007/978-1-4612-2432-7_7.

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Richardson, Daniel. "Finding the number of distinct real roots of sparse polynomials of the form p(x,x n)." In Computational Algebraic Geometry, 225–33. Boston, MA: Birkhäuser Boston, 1993. http://dx.doi.org/10.1007/978-1-4612-2752-6_16.

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Zarhin, Yuri G. "Odd-Dimensional Cohomology with Finite Coefficients and Roots of Unity." In Geometry Over Nonclosed Fields, 249–61. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-49763-1_8.

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Tan, Xuehou. "Efficient Algorithms for Searching a Polygonal Room with a Door." In Discrete and Computational Geometry, 339–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-47738-1_32.

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Steinacker, Harold. "Unitary Representations of the Quantum Anti-de Sitter Group at Roots of Unity and Elementary Particles." In Geometry and Quantum Physics, 406. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-46552-9_29.

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Richardson, Daniel. "Finding roots of equations involving functions defined by first order algebraic differential equations." In Effective Methods in Algebraic Geometry, 427–40. Boston, MA: Birkhäuser Boston, 1991. http://dx.doi.org/10.1007/978-1-4612-0441-1_28.

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Conference papers on the topic "Geometry of the rooms"

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Fadl, Ahmed, Stefanie Demming, Zongqin Zhang, Bjo¨rn Hoxhold, Stephanus Bu¨ttgenbach, Manfred Krafczyk, and Donna M. L. Meyer. "A Multifunctional Microfluidic Device Based on Bifurcation Geometry." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30950.

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Developing multifunctional devices are essential to realize more efficient Microsystems. With miniaturization processes taking place in many different applications, the rooms for single function microfluidic devices are limited. In this study, we introduce a multifunctional micro fluidic device based on bifurcation geometry which is capable of performing pumping and mixing at the same time. Optical lithography is used to fabricate the designed microfluidic device. The microfluidic device is tested at low actuator frequencies, and ethanol is employed as a working fluid. The operational principles are based on rectifying the oscillatory flows by using bifurcation structures for flow rectification. The results prove the feasibility of the novel design, and results are presented in terms of flow rates and maximum back pressures.

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Annibale, Paolo, Jason Filos, Patrick A. Naylor, and Rudolf Rabenstein. "Geometric inference of the room geometry under temperature variations." In 2012 5th International Symposium on Communications, Control and Signal Processing (ISCCSP). IEEE, 2012. http://dx.doi.org/10.1109/isccsp.2012.6217852.

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Rajapaksha, Tilak, Xiaojun Qiu, Eva Cheng, and Ian Burnett. "Geometrical room geometry estimation from room impulse responses." In 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2016. http://dx.doi.org/10.1109/icassp.2016.7471691.

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Petkovic, Ivan, and Petar Rajkovic. "Computer Visualization of Geometry of Polynomial Roots." In 2020 55th International Scientific Conference on Information, Communication and Energy Systems and Technologies (ICEST). IEEE, 2020. http://dx.doi.org/10.1109/icest49890.2020.9232825.

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Kim, Hansung, Luca Remaggi, Philip JB Jackson, Filippo Maria Fazi, and Adrian Hilton. "3D Room Geometry Reconstruction Using Audio-Visual Sensors." In 2017 International Conference on 3D Vision (3DV). IEEE, 2017. http://dx.doi.org/10.1109/3dv.2017.00076.

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Tervo, Sakari, and Timo Tossavainen. "3D room geometry estimation from measured impulse responses." In ICASSP 2012 - 2012 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2012. http://dx.doi.org/10.1109/icassp.2012.6287929.

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Lanel, Ganhewalage Jayantha, and Charles Ching-An Cheng. "The Number of Complex Roots of a Univariate Polynomial Within a Rectangle." In Annual International Conference on Computational Mathematics, Computational Geometry & Statistics (CMCGS 2014). GSTF, 2014. http://dx.doi.org/10.5176/2251-1911_cmcgs14.03.

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Kaushal, Vikas, Quentin Diduck, and Martin Margala. "Performance optimization of room temperature Deflection Transistors through modified geometry." In 2008 1st Microsystems and Nanoelectronics Research Conference (MNRC 2008). IEEE, 2008. http://dx.doi.org/10.1109/mnrc.2008.4683399.

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Song, Xiyu, Mei Wang, and Hongbing Qiu. "Room Geometry Reconstruction Based on Speech and Acoustic Image Methodology." In 2019 IEEE International Conference on Smart Internet of Things (SmartIoT). IEEE, 2019. http://dx.doi.org/10.1109/smartiot.2019.00026.

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Huynh, B. P. "Effects of Entrance Geometry on Solar Chimney’s Performance." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67816.

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Abstract:

People spend most of their time indoors. A comfortable indoor environment is thus essential for the occupants’ good health and productivity. Buildings are responsible for about half of a modern society’s total energy consumption. HVAC (Heating, Ventilation and Air-Conditioning) which is often used to provide thermal comfort to the occupants, in turn accounts for a major proportion of this energy demand. Minimising HVAC energy consumption will thus result in great economic benefits. It also contributes beneficially to the issue of sustainable future and climate change, by reducing fuel burning. Natural ventilation can be used to help reduce significantly HVAC energy demand. Solar chimney (thermal chimney) is a device which absorbs solar radiation to heat the air. The heated air, becoming buoyant, rises through the chimney’s passage and induces further air currents. When fitted to a building, solar chimney can thus induce fresh outside air to flow through it for ventilation. As a very useful ventilation device, solar chimney has been the subject of many studies. However, due to the complex non-laminar, non-isothermal flow and heat transfer involved, there are still many factors affecting a solar chimney’s performance (measured by the induced flow rate of air, for instance) not yet considered, especially regarding 3-dimensional computational modelling in real-sized building settings. This work thus investigates computationally natural ventilation induced by a roof-mounted solar chimney through a real-sized 3-dimensional room, using a commercial CFD (Computational Fluid Dynamics) software package which employs the Finite Volume Method. Chien’s turbulence model of low-Reynolds-number K-ε is used in a Reynolds Averaged Navier-Stokes (RANS) formulation. Thus, the full set of Reynolds-Averaged governing equations pertaining to non-isothermal, buoyancy induced, incompressible, steady, turbulent flow of air near standard conditions at sea level, coupled with equations describing the Chien’s turbulence model, are solved, with appropriate boundary conditions. No further simplifying assumptions are made. Grid convergence tests are conducted to make sure that the grid patterns used are appropriate. Adequate numerical convergence is allowed; this often requires that relative changes in the successive iterated solutions be less than 0.0001. Accumulation errors resulting from massive or lengthy computation are also carefully monitored and minimized. 64-bits precision is used throughout. It is found that entrance geometry to the chimney’s channel affects significantly the ventilation rate, especially at higher solar heat flux, with rounded entrance resulting in higher rate. But these entrance-geometry effects also vary significantly with location of the room’s inlet-opening which in its turn affects the flow path before the chimney’s entrance.

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Reports on the topic "Geometry of the rooms"

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Marks, Dr Richard, Dr William Harrop-Griffiths, Mr Mike Zeiderman, Dr David Selwyn, Dr Kathleen Ferguson, and Ms Katharina Floss. Storage of drugs in anaesthetic rooms. The Association of Anaesthetists of Great Britain and Ireland, June 2016. http://dx.doi.org/10.21466/g.sodiar.2016.

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Brandshaug, T. Stability of disposal rooms during waste retrieval. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/60687.

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Jurney, James D., Luke Samuel Garcia, and Jeffrey D. Goettee. Receptacle Installation Requirements for Rooms and Gloveboxes. Office of Scientific and Technical Information (OSTI), March 2020. http://dx.doi.org/10.2172/1595631.

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Heath, Daniel, and Joshua Jacobs. Geometry Playground. Washington, DC: The MAA Mathematical Sciences Digital Library, November 2010. http://dx.doi.org/10.4169/loci003567.

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Foster, Karis. Exposed Geometry. Ames: Iowa State University, Digital Repository, 2014. http://dx.doi.org/10.31274/itaa_proceedings-180814-975.

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Ungar, Abraham A. Hyperbolic Geometry. GIQ, 2014. http://dx.doi.org/10.7546/giq-15-2014-259-282.

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Ungar, Abraham A. Hyperbolic Geometry. Jgsp, 2013. http://dx.doi.org/10.7546/jgsp-32-2013-61-86.

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Earnshaw, Connie. Overgrown geometry. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5380.

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Butler, Lee A., and Clifford Yapp. Adaptive Geometry Shader Tessellation for Massive Geometry Display. Fort Belvoir, VA: Defense Technical Information Center, March 2015. http://dx.doi.org/10.21236/ada616646.

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Chen, Harry, Tim Finin, and Anupam Joshi. A Context Broker for Building Smart Meeting Rooms. Fort Belvoir, VA: Defense Technical Information Center, January 2004. http://dx.doi.org/10.21236/ada439472.

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