Relevant bibliographies by topics / Staircases

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Staircases'

Author: Grafiati
Published: 4 June 2021
Last updated: 28 July 2024

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Journal articles on the topic "Staircases"

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Wen, Ming, Hongxiang Tian, Weiwei Wang, Baokui Chen, and Huayao Fu. "Research on Seismic Performance of Frame Structure with Beam Staircases." Buildings 12, no. 8 (July 27, 2022): 1106. http://dx.doi.org/10.3390/buildings12081106.

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Beam staircases are widely used in frame structures. In structural design, stair flights are often ignored in the model establishment, and their loads are only added to the stair beams. However, under a seismic load, the flight of stairs will increase the staircase’s stiffness and affect the seismic response characteristics of the stairs and even of the structure. According to the engineering example, the finite element numerical models of the pure frame structure without staircases, the frame structure with fixed connection beam staircases, and the frame structure with sliding connection beam staircases were established. Modal analysis, response spectrum analysis, and elastic time-history analysis were carried out. By comparing the maximum story displacement, story displacement angle, natural period, story shear force, and the internal force of components of each model, the influences of beam staircases and their bearing connection mode on the seismic performance of the building were analyzed. In addition, by examining the frame model with sliding connection beam stairs, the influences of different staircase positions on the seismic performance of the building were studied. Finally, the advantages and disadvantages of different design schemes were compared, and the effects of the modeling method, support type, and layout position of the beam staircases on the seismic performance of the frame structure were summarized. The conclusions are that the story drift angle of the sliding connection structure is larger than that of the fixed connection structure, and the internal force of the frame columns of the former is smaller than that of the latter. Moreover, the positions of the staircase will affect the horizontal displacement of the structure.
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Shulman, Gordon L. "Attentional Modulation of a Figural Aftereffect." Perception 21, no. 1 (February 1992): 7–19. http://dx.doi.org/10.1068/p210007.

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Evidence is reported that indicates that adaptation of the Schroder staircase is affected by attention. In previous work it has been shown that if subjects adapt to an unambiguous staircase, responses to an ambiguous test figure are biased towards the opposing perspective. In the current work, subjects adapted to superimposed upright and inverted Schroder staircases. Both staircases were centered on a common fixation point and were of different sizes and colors. Attention to each staircase was controlled by asking subjects to detect color changes in the line segments that defined one or the other staircase. Responses to an ambiguous test figure depended on which of the adapting staircases was attended.
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Ramalingam, Balakrishnan, Rajesh Elara Mohan, Selvasundari Balakrishnan, Karthikeyan Elangovan, Braulio Félix Gómez, Thejus Pathmakumar, Manojkumar Devarassu, Madan Mohan Rayaguru, and Chanthini Baskar. "sTetro-Deep Learning Powered Staircase Cleaning and Maintenance Reconfigurable Robot." Sensors 21, no. 18 (September 18, 2021): 6279. http://dx.doi.org/10.3390/s21186279.

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Staircase cleaning is a crucial and time-consuming task for maintenance of multistory apartments and commercial buildings. There are many commercially available autonomous cleaning robots in the market for building maintenance, but few of them are designed for staircase cleaning. A key challenge for automating staircase cleaning robots involves the design of Environmental Perception Systems (EPS), which assist the robot in determining and navigating staircases. This system also recognizes obstacles and debris for safe navigation and efficient cleaning while climbing the staircase. This work proposes an operational framework leveraging the vision based EPS for the modular re-configurable maintenance robot, called sTetro. The proposed system uses an SSD MobileNet real-time object detection model to recognize staircases, obstacles and debris. Furthermore, the model filters out false detection of staircases by fusion of depth information through the use of a MobileNet and SVM. The system uses a contour detection algorithm to localize the first step of the staircase and depth clustering scheme for obstacle and debris localization. The framework has been deployed on the sTetro robot using the Jetson Nano hardware from NVIDIA and tested with multistory staircases. The experimental results show that the entire framework takes an average of 310 ms to run and achieves an accuracy of 94.32% for staircase recognition tasks and 93.81% accuracy for obstacle and debris detection tasks during real operation of the robot.
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Cho, HyeYoung, Amanda J. Arnold, Chuyi Cui, Zihan Yang, Tim Becker, Ashwini Kulkarni, Anvesh Naik, and Shirley Rietdyk. "Risky behavior during stair descent for young adults: Differences in men versus women." PLOS ONE 18, no. 7 (July 26, 2023): e0288438. http://dx.doi.org/10.1371/journal.pone.0288438.

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Injuries commonly occur on stairs, with high injury rates in young adults, especially young women. High injury rates could result from physiological and/or behavioral differences; this study focuses on behaviors. The purposes of this observational study were (1) to quantify young adult behaviors during stair descent and (2) to identify differences in stair descent behavior for young adult men versus women. Young adult pedestrians (N = 2,400, 1,470 men and 930 women) were videotaped during descent of two indoor campus staircases, a short staircase (2 steps) and a long staircase (17 steps). Behaviors during stair descent were coded by experimenters. Risky behaviors observed on the short staircase included: No one used the handrail, 16.1% used an electronic device, and 16.4% had in-person conversations. On the long staircase: 64.8% of pedestrians did not use the handrail, 11.9% used an electronic device, and 14.5% had in-person conversations. Risky behaviors observed more in women included: less likely to use the handrail (long staircase), more likely to carry an item in their hands (both staircases), more likely to engage in conversation (both staircases), and more likely to wear sandals or heels (both staircases) (p≤0.05). Protective behaviors observed more in women included: less likely to skip steps (both staircases), and more likely to look at treads during transition steps (long staircase) (p≤0.05). The number of co-occurring risky behaviors was higher in women: 1.9 vs 2.3, for men vs women, respectively (p<0.001). Five pedestrians lost balance but did not fall; four of these pedestrians lost balance on the top step and all five had their gaze diverted from the steps at the time balance was lost. The observed behaviors may be related to the high injury rate of stair-related falls in young adults, and young women specifically.
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Bebieva, Yana, and Mary-Louise Timmermans. "The Relationship between Double-Diffusive Intrusions and Staircases in the Arctic Ocean." Journal of Physical Oceanography 47, no. 4 (April 2017): 867–78. http://dx.doi.org/10.1175/jpo-d-16-0265.1.

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AbstractThe origin of double-diffusive staircases in the Arctic Ocean is investigated for the particular background setting in which both temperature and salinity increase with depth. Motivated by observations that show the coexistence of thermohaline intrusions and double-diffusive staircases, a linear stability analysis is performed on the governing equations to determine the conditions under which staircases form. It is shown that a double-diffusive staircase can result from interleaving motions if the observed bulk vertical density ratio is below a critical vertical density ratio estimated for particular lateral and vertical background temperature and salinity gradients. Vertical background temperature and salinity gradients dominate over horizontal gradients in determining whether staircases form, with the linear theory indicating that perturbations to stronger vertical temperature gradients are more likely to give rise to a staircase. Examination of Arctic Ocean temperature and salinity measurements indicates that observations are consistent with the theory for reasonable estimates of eddy diffusivity and viscosity.
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Ilyas, Muhammad, Anirudh Krishna Lakshmanan, Anh Vu Le, and Mohan Rajesh Elara. "Staircase Recognition and Localization Using Convolutional Neural Network (CNN) for Cleaning Robot Application." Mathematics 11, no. 18 (September 18, 2023): 3964. http://dx.doi.org/10.3390/math11183964.

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Floor-cleaning robots are primarily designed to clean on a single floor, while multi-floor environments are usually not considered target applications. However, it is more efficient to have an autonomous floor-cleaning robot that can climb stairs and reach the next floors in a multi-floor building. To operate in such environments, the ability of a mobile robot to autonomously traverse staircases is very important. For this operation, staircase detection and localization are essential components for planning the traversal route on staircases. This article describes a deep learning approach using a convolutional neural network (CNN)-based robot operation system (ROS) framework for staircase detection, localization, and maneuvering of the robot to the detected stair. We present a real-time object detection framework to detect staircases in incoming images. We also localize these staircases using a contour detection algorithm to detect the target point: a point close to the center of the first step, and an angle of approach to the target point with respect to the current location of the robot. Experiments are performed with data from images captured on different types of staircases at different viewpoints/angles. The experimental results show that the presented approach can achieve an accuracy of 95% and a recall of 86.81%. A total runtime of 155 ms is taken to identify the presence of a staircase and the detection of the first step in the working environment, as well as being able to locate the target point with an accuracy of ±2 cm, ±1 degree.
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Losada, M. Piacquadio, and S. Grynberg. "Cantor Staircases in Physics and Diophantine Approximations." International Journal of Bifurcation and Chaos 08, no. 06 (June 1998): 1095–106. http://dx.doi.org/10.1142/s0218127498000887.

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For a wide class of dynamical systems the variables involved relate to one another through a Cantor staircase function. When they are time variables, the staircases have well-known universal properties that suggest a connection with certain classical problems in Number Theory. In this paper we extend some of those universal properties to certain Cantor staircases that appear in Quantum Mechanics, where the variables involved are not time variables. We also develop some connections between the geometry of these Cantor staircases and the problem of approximating irrational numbers of rational ones, classical in Number Theory.
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Yang, Yang, Xiaodong Cai, Gang Yao, Meng Wang, Canwei Zhou, Ting Lei, and Yating Zhang. "Research on Intelligent Prefabricated Reinforced Concrete Staircase Lifting Point Setting Method Considering Multidimensional Spatial Constraint Characteristics." Sustainability 16, no. 14 (July 9, 2024): 5843. http://dx.doi.org/10.3390/su16145843.

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Prefabricated reinforced concrete staircases (PC staircases) are prefabricated components that are widely used in prefabricated buildings and are used in large quantities. During the production and construction of a PC staircase, the lifting point setting directly affects the construction safety, construction efficiency, and construction quality. In this paper, we analyze the quality problems and safety risks in the design, production, and construction of PC staircases under the constraints of multidimensional spatial characteristics, clarify the key technical difficulties of prefabricated staircase lifting under the multidimensional spatial and temporal constraints, and analyze the factors that should be considered in the setting of lifting points. In this paper, a prefabricated staircase lifting point setting database is established and a thin-plate spline interpolation algorithm is introduced to expand it. Based on the support vector machine algorithm, the process of optimization is carried out for the kernel function scale parameter and penalty factor, and it is concluded that for every increase of two in the number of cross-validation folds, the percentage reduction in minimum RMSE is 9.4%, 17.8%, and 4.2%, respectively, the percentage increase in the optimization time is 39.7%, 61.8%, and 27.3%, respectively, and a PC staircase lifting point setup method based on the small-sample database is proposed. The number of lifting points and lifting point locations of the PC staircase satisfying the multidimensional spatial feature constraints can be obtained by inputting the five design parameters of the PC staircase, namely, the number of treads, the height of the treads, the width of the treads, the width of the staircase, and the weight of the staircase, into the lifting point setup method proposed in this paper. The reliability of the precast reinforced concrete staircase lifting point setting method proposed in this paper when considering the multidimensional spatial constraint characteristics is verified by the precast staircases in deep shafts for assembly construction at the Chongqing metro station.
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Rollo, Callum, Karen J. Heywood, and Rob A. Hall. "Glider observations of thermohaline staircases in the tropical North Atlantic using an automated classifier." Geoscientific Instrumentation, Methods and Data Systems 11, no. 2 (October 25, 2022): 359–73. http://dx.doi.org/10.5194/gi-11-359-2022.

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Abstract. Thermohaline staircases are stepped structures of alternating thick mixed layers and thin high-gradient interfaces. These structures can be up to several tens of metres thick and are associated with double-diffusive mixing. Thermohaline staircases occur across broad swathes of the Arctic and tropical and subtropical oceans and can increase rates of diapycnal mixing by up to 5 times the background rate, driving substantial nutrient fluxes to the upper ocean. In this study, we present an improved classification algorithm to detect thermohaline staircases in ocean glider profiles. We use a dataset of 1162 glider profiles from the tropical North Atlantic collected in early 2020 at the edge of a known thermohaline staircase region. The algorithm identifies thermohaline staircases in 97.7 % of profiles that extend deeper than 300 m. We validate our algorithm against previous results obtained from algorithmic classification of Argo float profiles. Using fine-resolution temperature data from a fast-response thermistor on one of the gliders, we explore the effect of varying vertical bin sizes on detected thermohaline staircases. Our algorithm builds on previous work by adding improved flexibility and the ability to classify staircases from profiles with noisy salinity data. Using our results, we propose that the incidence of thermohaline staircases is limited by strong background vertical gradients in conservative temperature and absolute salinity.
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Radko, T., A. Bulters, J. D. Flanagan, and J. M. Campin. "Double-Diffusive Recipes. Part I: Large-Scale Dynamics of Thermohaline Staircases." Journal of Physical Oceanography 44, no. 5 (April 24, 2014): 1269–84. http://dx.doi.org/10.1175/jpo-d-13-0155.1.

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Abstract Three-dimensional dynamics of thermohaline staircases are investigated using a series of basin-scale staircase-resolving numerical simulations. The computational domain and forcing fields are chosen to reflect the size and structure of the North Atlantic subtropical thermocline. Salt-finger transport is parameterized using the flux-gradient formulation based on a suite of recent direct numerical simulations. Analysis of the spontaneous generation of thermohaline staircases suggests that thermohaline layering is a product of the gamma instability, associated with the variation of the flux ratio with the density ratio . After their formation, numerical staircases undergo a series of merging events, which systematically increase the size of layers. Ultimately, the system evolves into a steady equilibrium state with pronounced layers 20–50 m thick. The size of the region occupied by thermohaline staircases is controlled by the competition between turbulent mixing and double diffusion. Assuming, in accordance with observations, that staircases form when the density ratio is less than the critical value of , the authors arrive at an indirect estimate of the characteristic turbulent diffusivity in the subtropical thermocline.
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Dissertations / Theses on the topic "Staircases"

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Ham, Brittany. "Useless concrete staircases." Tallahassee, Fla. : Florida State University, 2008. http://purl.fcla.edu/fsu/lib/digcoll/undergraduate/honors-theses/341809.

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Kerr, Stuart Clifford. "Human induced loading on staircases." Thesis, University College London (University of London), 1998. http://discovery.ucl.ac.uk/1318004/.

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Over the last decade it has become increasingly popular to provide large public areas with gracefully designed 'flexible' staircases. One inherent characteristic of this type of construction is a low stiffness to mass ratio and hence a low natural frequency when compared to more traditional designs. A number of staircases have been found to be dynamically responsive to pedestrian traffic resulting in costly repairs. The objective of this thesis was to investigate the differences between human induced loading on floors with that on stairs. Experimental work carried out on a purpose built staircase showed that forces up to 3 times the static body weight were generated during fast descents while forces up to 2.5 times the static body weight were generated during fast ascents. The work also showed that first harmonic values generated while ascending were slightly higher than for descending whilst second harmonic values were up to 3 times greater for fast descents than for fast ascents. When compared with floor testing, stair testing produced first harmonic values nearly 2.5 times greater with second, third and fourth harmonic values nearly 3 times greater. The harmonic results for the flat testing were also incorporated into a new mathematical expression to predict peak accelerations on simply supported floors and footbridges. The experimental results were duplicated analytically by developing a computer program to calculate the vertical ground reaction forces from body segment positional data. Following a Newtonian approach, the predicted first harmonic values were 20% to 30% lower than actual while the second harmonic values were approximately the same. Monte Carlo simulation techniques were also used to model the effects of group loading on stairs. The simulations predicted enhancement factors (a multiplier on single subject loading) of 3 to 6 for smaller groups(< 9 people) and 4 for larger groups(> 25 people). If the experimental/analytical results are combined with the group loading predictions, the harmonic values for groups ascending or descending flexible staircase could be substantially increased. These results demonstrate that loading data from floors is highly inappropriate for staircase design.
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Banfield, Ian Matthew. "Baskets, Staircases and Sutured Khovanov Homology." Thesis, Boston College, 2017. http://hdl.handle.net/2345/bc-ir:108149.

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Thesis advisor: Julia E. Grigsby
We use the Birman-Ko-Lee presentation of the braid group to show that all closures of strongly quasipositive braids whose normal form contains a positive power of the dual Garside element δ are fibered. We classify links which admit such a braid representative in geometric terms as boundaries of plumbings of positive Hopf bands to a disk. Rudolph constructed fibered strongly quasipositive links as closures of positive words on certain generating sets of Bₙ and we prove that Rudolph’s condition is equivalent to ours. We compute the sutured Khovanov homology groups of positive braid closures in homological degrees i = 0,1 as sl₂(ℂ)-modules. Given a condition on the sutured Khovanov homology of strongly quasipositive braids, we show that the sutured Khovanov homology of the closure of strongly quasipositive braids whose normal form contains a positive power of the dual Garside element agrees with that of positive braid closures in homological degrees i ≤ 1 and show this holds for the class of such braids on three strands
Thesis (PhD) — Boston College, 2017
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Mathematics
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Breuer, Felix [Verfasser]. "Ham sandwiches, staircases and counting polynomials / Felix Breuer." Berlin : Freie Universität Berlin, 2009. http://d-nb.info/1023956144/34.

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Caro, Gregory P. "Direct numerical simulations of diffusive staircases in the Arctic." Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Mar/09Mar%5FCaro.pdf.

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Thesis (M.S. in Physical Oceanography)--Naval Postgraduate School, March 2009.
Thesis Advisor(s): Radko, Timour. "March 2009." Description based on title screen as viewed on April 23, 2009. Author(s) subject terms: Double-diffusion, diffusive convection, heat flux, thermohaline staircase, Includes bibliographical references (p. 39-41). Also available in print.
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Wall, Steven E. "Structure and evolution of thermohaline staircases in tropical North Atlantic." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FWall.pdf.

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Thesis (M.S. in Physical Oceanography)--Naval Postgraduate School, December 2007.
Thesis Advisor(s): Radko, Timour. "December 2007." Description based on title screen as viewed on January 24, 2008. Includes bibliographical references (p. 83-86). Also available in print.
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Wilson, Ana Lisa. "Structure and dynamics of the thermohaline staircases in the Beaufort Gyre." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Sep%5FWilson%5FAna.pdf.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, September 2007.
Thesis Advisor(s): Radko, Timour. "September 2007." Description based on title screen as viewed on October 25, 2007. Includes bibliographical references (p. 55-57). Also available in print.
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Andersson, Lisa. "Dynamics of staircases : A case study to improve finite element modeling." Thesis, KTH, Bro- och stålbyggnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209217.

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Vibrations in staircases have during the last decades become an important issue in design. The main reasons are current architectural trends aiming for innovative, slender and high staircases, together with developments in material properties and building technique, making these aims possible. The improved material properties and slender design of the staircase makes the structure lightweight and have great impact on the flexibility and dynamic performance of the staircase. This have resulted in that vibration serviceability criteria increasingly often are becoming governing in design. The performance of staircases in serviceability under dynamic loads is however very hard to predict. In many cases hand calculations will not be sufficient, and a computerized model, e.g. a finite element model, need to be created. Creating a finite element model that performs well when subjected to dynamic loads is however not simple. Especially boundary conditions, connections and the effect of non-structural elements are hard to adequately represent. The formulation of the load is also a complex question. The main dynamic load that staircases are subjected to, that causes uncomfort for the user, is the load that the user themselves apply on the structure, when ascending or descending.  The main part of this master thesis project is a case study of two lightweight, steel staircases. To form a basis for the case study, current research have been summarized in a literature survey. An introduction of elementary dynamics is also made for less conversant reader. The literature survey reviews previous research about loads introduced by humans and how these can be formulated, both for single human excitation and group loading. How vibrations arise and how humans percept vibrations is also reviewed. The view and recommendations of standards and regulations about load formulation and vibration acceleration limits is presented. Recommendations in research for finite element modeling of staircases and dynamic loads is also reviewed. The case study consists of measurements and analyzing of finite element models of the staircases. Measurements of vibrations and the dynamic response of the staircases under human introduced loads have been conducted. The human introduced loads included are an impulse load created by a jump, ascent at a moderate pace of a single subject and descent at a moderate pace by a single subject. The measurements have been recreated in finite element models. Different modeling choices and formulations for ascending, descending, and impulse loads are studied.  The aim is to investigate how different modeling choices in connections, boundary conditions and adjacent structure, affects the natural frequencies and mode shapes of the staircase. Different load formulations for the loads are analyzed, both for the impulse load and for the loads created by a subject ascending and descending. With these results as a basis, some general recommendations about construction a finite element mode of a staircase and achieving appropriate load formulation for dynamic loads are made.
Vibrationer i trappor har under de senaste årtiondena blivit en viktig fråga vid projekteringen av trappor. De främsta anledningar är dagens arkitektoniska trender som eftersträvar innovativa, slanka och långa trappor, tillsammans med utveckling i material egenskaper och förbättrade byggmetoder som möjliggör dessa trender. De förbättrade materialegenskaperna samt den slanka designen av trappan gör konstruktionen lätt och har stor påverkan på styvheten samt det dynamiska gensvaret hos trappan. Detta har resulterat i att vibrationer i bruksgränstillståndet allt oftare är dimensionerande i designen av trappan.    Responsen under dynamiska laster i bruksgränstillståndet hos trappan är dock väldigt svårt att förutbestämma. I de flest fall är handberäkningar inte tillräckliga för att förutsäga detta beteende och en dator modell, t.ex. en finita element modell, behöver utvecklas. Att utveckla en finita element modell som genererar tillförlitliga respons är dock inte enkelt. Speciellt randvillkoren, kopplingar och effekten av icke bärande element är svårt att modellera tillförlitligt. Hur man formulerar lasten kan också vara en svår fråga. Den främst dynamiska lasten som trappor utsätts för som skapar obekväma vibrationer för användaren, är också skapade av användaren själv eller andra användare som går upp eller ner i trappan.  Huvuddelen av detta arbete består av en fallstudie av två lätta ståltrappor. För att få en bas för fallstudien har rådande forskning gåtts igenom och summerats i en litteraturstudie. En introduktion av grundläggande dynamik har även gjorts för den mindre insatta läsaren.  Litteraturstudien har gått igenom forsning om dynamiska laster orsakade av människor och hur dessa kan beskrivas, både för laster orsakade av en människa, samt även för en grupp av människor. Hur vibrationer uppkommer och hur människor uppfattar vibrationer har också undersökts. Standarders uppfattning och rekommendationer, samt regelverk om lastformulering och gränsvärden för vibrationer presenteras. Rekommendationer från forskning av finita element modeller av trappor och dynamiska laster i dessa gås också igenom. Fallstudien består av mätningar i de verkliga trapporna, och av uppbyggnad och analysering av finita element modeller av trapporna. Mätningar av vibrationer och den dynamiska responsen hos trapporna när de utsätts för dynamiska laster orsakade av människor har utförts. De studerade lasterna inkluderar en impulslast skapad av ett hopp, last från en människa som går upp i trappan och last från en människa som går ner i trappan. Mätningarna har sedan försökts återskapas i finita element modellerna. Olika modellerings val och formuleringar för gång och impuls lasterna har studerats. Syftet är att undersöka hur olika modelleringsval hos kopplingar, randvillkor samt närliggande struktur påverkar egenfrekvenserna och modeformen hos trapporna. Olika beskrivningar på lasterna analyseras, både för impuls lasten, samt lasten från en människa som gå upp eller ner i trappan. Med hjälp av dessa resultat kommer några generella rekommendationer om hur finita element modeller av trappor kan konstrueras och hur en tillbörlig lastformulering för dynamiska laster uppnås.
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Bulters, Amy C. "Three-dimensional structure of thermohaline staircases in the tropical north Atlantic and their effect on acoustic propagation." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/27801.

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Under typical conditions in the subtropical thermocline double-diffusion occurs in the form of salt fingering (warm, salty fluid overlies cold, fresh fluid). The formation of staircases in the thermohaline structure of the ocean has been observed since the late 1960s, with recent field data collected within the tropical Atlantic displaying staircases with high-gradient interfaces characterized by a unique spatial orientation determined by background temperature and salinity. Competing theories have been proposed to explain the dynamics of these staircases; however, the origin of the staircases and the mechanism that controls final equilibrium remains poorly understood. This thesis examines staircase development in the tropical Atlantic. Incorporating double diffusion using the flux-gradient formulation of Radko and Smith, staircases are numerically simulated to resolve the controversial aspects of the staircase theories. The staircase simulations are critically evaluated against the C-SALT experiment observations, and the conditions for their formation and explanation of the fully equilibrated state are resolved and explained. The effect of acoustic propagation through the three-dimensional modeled staircases is evaluated to determine the impact of these large staircase areas on various frequencies and depths.
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Burns, Brenda D. "The Staircase Decomposition for Reductive Monoids." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-20020422-102254.

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Burns, Brenda Darlene. The Staircase Decomposition for Reductive Monoids. (Under the direction of Mohan Putcha.) The purpose of the research has been to develop a decomposition for the J-classes of a reductive monoid. The reductive monoid M(K) isconsidered first. A J-class in M(K) consists ofelements of the same rank. Lower and upper staircase matricesare defined and used to decompose a matrix x of rank r into theproduct of a lower staircase matrix, a matrix with a rank rpermutation matrix in the upper left hand corner, and an upperstaircase matrix, each of which is of rank r. The choice ofpermutation matrix is shown to be unique. The primary submatrix of a matrixis defined. The unique permutation matrix from the decompositionabove is seen to be the unique permutation matrix from Bruhat'sdecomposition for the primary submatrix. All idempotent elementsand regular J-classes of the lower and upper staircasematrices are determined. A decomposition for the upper and lowerstaircase matrices is given as well.The above results are then generalized to an arbitrary reductivemonoid by first determining the analogue of the components forthe decomposition above. Then the decomposition above is shown tobe valid for each J-class of a reductive monoid. Theanalogues of the upper and lower staircase matrices are shown tobe semigroups and all idempotent elements and regularJ-classes are determined. A decomposition for eachof them is discussed.

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Books on the topic "Staircases"

1

Azzopardi, Charles Paul. Staircases of Malta. Birkirkara]: Kite, 2018.

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Gambardella, Cherubino. L' architettura delle scale: Disegno, teoria e tecnica. Genova: Sagep, 1993.

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Andrea, Ulandi, and Università di Padova. Dipartimento di architettura, urbanistica e rilevamento, eds. Scale con rampe ad andamento non rettilineo in materiali lapidei nel Veneto. Padova: SGEditoriali, 2000.

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Hartisch, Karl. Treppen: In Stahl, Beton und Holz. Stuttgart: Karl Krämer, 1993.

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Mielke, Friedrich. Treppen in Ingolstadt. Allersberg: J. Gilardi, 1992.

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Manrique, Julia. El sueño de Jacob: Arquitectura y poética de la escalera. Santander (Cantabria): El Desvelo Ediciones, 2019.

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Bangash, M. Y. H. Staircases: Structural analysis and design. Rotterdam: A.A. Balkema, 1999.

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Friedrich, Mielke, ed. Treppen zwischen Tauber, Rezat und Altmühl. Treuchtlingen: W.E. Keller, 1985.

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Klaus, Siegele, ed. Geradläufige Treppen: Konstruktion, Gestaltung, Beispiele. München: Deutsche Verlags-Anstalt, 2009.

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Hansmann, Christine-Ruth. Treppen in der Architektur: Gestaltung, Entwicklung, Technik und Ausführung. Stuttgart: Deutsche Verlags-Anstalt, 1993.

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Book chapters on the topic "Staircases"

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Calvo-López, José. "Staircases." In Mathematics and the Built Environment, 533–70. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43218-8_11.

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Storey, Sally. "Staircases." In Inspired by Light, 70–81. London: RIBA Publishing, 2021. http://dx.doi.org/10.4324/9781003108559-10.

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McHenry, David. "Staircases." In Drawing the Line, 81–92. 2nd ed. New York: Routledge, 2023. http://dx.doi.org/10.4324/9781003293972-18.

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Daneluzzo, Mirko, and Michele Daneluzzo. "Reinventing Staircases for Thermoplastic Additive Manufacturing." In Proceedings of the 2021 DigitalFUTURES, 349–58. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_32.

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AbstractThe paper presents an ongoing project focusing on the application of additive manufacturing technologies for the design of staircases. Additive digital fabrication allows architects to reinvestigate materials, processes, and creates new design opportunities to explore novel aesthetical and functional expression in architecture, enabling a reinterpretation of the typology of the staircase, using thermoplastic materials. This paper reviews the opportunities and challenges of using 3D printing for fabricating custom stairs with complex geometries in two studied configurations.
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Leite, Fátima Silva, Jorge Batista, Krzysztof Krakowski, André Carvalho, Tiago Cruz, Eduardo Domingues, André Lizardo, and Gonçalo Saraiva. "Wheels for Staircases." In Lecture Notes in Electrical Engineering, 361–71. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43671-5_31.

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Rees, Yvonne. "Halls and Staircases." In Floor Style, 52–69. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-6626-3_3.

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Seeley, Ivor H., and Roger Winfield. "Staircases and Fittings." In Building Quantities Explained, 261–71. London: Macmillan Education UK, 1999. http://dx.doi.org/10.1007/978-1-349-14653-6_12.

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Bhanja, Santanu. "Design of staircases." In Reinforced Concrete Design, 367–75. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003415398-20.

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Bertozzi, Maria, Tara S. Holm, Emily Maw, Dusa McDuff, Grace T. Mwakyoma, Ana Rita Pires, and Morgan Weiler. "Infinite Staircases for Hirzebruch Surfaces." In Association for Women in Mathematics Series, 47–157. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-030-80979-9_2.

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Seeley, Ivor H. "Measurement of Staircases and Fittings." In Building Quantities Explained, 177–83. London: Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-19343-1_12.

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Conference papers on the topic "Staircases"

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Rodagi, Akshata, Krutika Patil, Akshata Budi, and Vijaykumar Sajjanar. "Low cost reconfigured adaptive wheelchair for staircases." In 2016 10th International Conference on Intelligent Systems and Control (ISCO). IEEE, 2016. http://dx.doi.org/10.1109/isco.2016.7727113.

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Osswald, Stefan, Attila Gorog, Armin Hornung, and Maren Bennewitz. "Autonomous climbing of spiral staircases with humanoids." In 2011 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2011). IEEE, 2011. http://dx.doi.org/10.1109/iros.2011.6048209.

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Osswald, Stefan, Attila Gorog, Armin Hornung, and Maren Bennewitz. "Autonomous climbing of spiral staircases with humanoids." In 2011 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2011). IEEE, 2011. http://dx.doi.org/10.1109/iros.2011.6094533.

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Russo, Lucia, and Erasmo Mancusi. "Devil's staircases in loop networks with symmetry locking." In 11TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2013: ICNAAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4825659.

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Tegos, I., V. Panoskaltsis, and S. Tegou. "ANALYSIS AND DESIGN OF STAIRCASES AGAINST SEISMIC LOADINGS." In 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2014. http://dx.doi.org/10.7712/120113.4736.c1745.

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Kar, Bapi, Susmita Sur-Kolay, and Chittaranjan Mandal. "Global Routing Using Monotone Staircases with Minimal Bends." In 2014 27th International Conference on VLSI Design. IEEE, 2014. http://dx.doi.org/10.1109/vlsid.2014.70.

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ERTEL, H. "IMPROVEMENT OF IMPACT SOUND INSULATION OF FRAMEWORK STAIRCASES." In Improving Sound Insulation in Existing Buildings 1986. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/22085.

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Nosov, V. S., A. G. Soshinov, and V. S. Galuschak. "The independent fixture for illumination of staircases of buildings." In 2010 International Conference on Actual Problems of Electron Devices Engineering (APEDE 2010). IEEE, 2010. http://dx.doi.org/10.1109/apede.2010.5624073.

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Soleng, H. H., J. C. Rivenæs, J. Gjerde, K. Hollund, and L. Holden. "Structural Uncertainty Modelling and the Representation of Faults as Staircases." In ECMOR IX - 9th European Conference on the Mathematics of Oil Recovery. European Association of Geoscientists & Engineers, 2004. http://dx.doi.org/10.3997/2214-4609-pdb.9.a002.

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Kar, Bapi, Susmita Sur-Kolay, and Chittarnjan Mandal. "A New Method for Defining Monotone Staircases in VLSI Floorplans." In 2015 IEEE Computer Society Annual Symposium on VLSI (ISVLSI). IEEE, 2015. http://dx.doi.org/10.1109/isvlsi.2015.47.

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Reports on the topic "Staircases"

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García-Rojas, Karen, Paula Herrera-Idárraga, Leonardo Fabio Morales, Natalia Ramírez-Bustamante, and Ana María Tribín-Uribe. (She)cession: The Colombian female staircase fall. Banco de la República de Colombia, November 2020. http://dx.doi.org/10.32468/be.1140.

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This article seeks to analyze the Colombian labor market during the COVID-19 crisis to explore its effect on labor market gender gaps. The country offers an interesting setting for analysis because, as most countries in the Global South, it has an employment market that combines formal and informal labor, which complicates the nature of the pandemic's aftermath. Our exploration offers an analysis that highlights the crisis's effects as in a downward staircase fall that mainly affects women compared to men. We document a phenomenon that we will call a "female staircase fall." Women lose status in the labor market; the formal female workers' transition to informal jobs, occupied women fall to unemployment, and the unemployed go to inactivity; therefore, more and more women are relegated to domestic work. We also study how women’s burden of unpaid care has increased due to the crisis, affecting their participation in paid employment.
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Baker, Steven F., and Richard E. Rosenthal. A Cascade Approach for Staircase Linear Programs. Fort Belvoir, VA: Defense Technical Information Center, July 1998. http://dx.doi.org/10.21236/ada351869.

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Entriken, Robert. A Parallel Decomposition Algorithm for Staircase Linear Programs. Fort Belvoir, VA: Defense Technical Information Center, December 1988. http://dx.doi.org/10.21236/ada204662.

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Reiley, Daniel J., and Stephen C. McClain. The Staircase Lens: a Novel for Athermalization and Achromatization,. Fort Belvoir, VA: Defense Technical Information Center, September 1995. http://dx.doi.org/10.21236/ada299506.

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Roca, V., C. Neumann, and D. Furodet. Low Density Parity Check (LDPC) Staircase and Triangle Forward Error Correction (FEC) Schemes. RFC Editor, June 2008. http://dx.doi.org/10.17487/rfc5170.

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Roca, V., M. Cunche, and J. Lacan. Simple Low-Density Parity Check (LDPC) Staircase Forward Error Correction (FEC) Scheme for FECFRAME. RFC Editor, December 2012. http://dx.doi.org/10.17487/rfc6816.

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Vanden Berg, Michael, Andrew Rupke, and Stephanie Mills. Resource Overview for the Original 1996 Grand Staircase–Escalante National Monument Designation and Vicinity. Utah Geological Survey, March 2020. http://dx.doi.org/10.34191/pi-103.

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Baker, Steven F. A Temporal Cascade Approach for Staircase Liner Programs with an Application to Air Force Mobility Optimization,. Fort Belvoir, VA: Defense Technical Information Center, May 1997. http://dx.doi.org/10.21236/ada324621.

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Yeh, Wang-Chi Vincent. SPA-LEED Study of the Morphology and Nucleation of a Novel Growth Mode and the ''devil's staircase'' on Pb/Si(111). Office of Scientific and Technical Information (OSTI), January 2003. http://dx.doi.org/10.2172/822043.

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Tran, Tut, Alexandra Bonham, Justin Tweet, and Vincent Santucci. Bryce Canyon National Park: Paleontological resource inventory. National Park Service, 2024. http://dx.doi.org/10.36967/2302804.

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Originally designated as a national monument in 1923, Bryce Canyon National Park (BRCA) is recognized for its exceptional pink-orange hoodoo landscapes. Its iconic hoodoos, consisting of the Paleocene?Eocene Claron Formation, are only part of the geology of BRCA, which includes a nearly uninterrupted sequence of Late Cretaceous Western Interior Seaway evolution and diverse depositional environments from approximately 100 to 77 million years ago. This sequence consists of the coastal Naturita Formation, the marine Tropic Shale, the transitional Straight Cliffs Formation, and the terrestrial Wahweap Formation. These strata, and the Claron Formation, preserve diverse paleontological resources. Fossils at BRCA have received little visibility for most of the park?s history, despite relatively rapid advances in the study of Late Cretaceous and Paleogene paleontology in neighboring public lands, especially Grand Staircase-Escalante National Monument (GSENM) to the east. The best documentation of paleontological resources at BRCA was produced through concerted field inventory of the park conducted by Dr. Jeff Eaton and several cohorts of interns and students from 1988 to 2015. In that time, Eaton?s team documented nearly 200 paleontological localities within the park that yielded clams, snails, fish, frogs, turtles, lizards, snakes, crocodilians, dinosaurs, and mammals from the Straight Cliffs and Wahweap Formations and invertebrates, plants, and trace fossils in the Claron Formation. Eaton?s survey resulted in several publications, including the description of new microvertebrate species from the Straight Cliffs and Wahweap Formations. Despite this body of work, the park did not develop an internal paleontological resources management program. A new paleontological resources program at BRCA was advanced in response to construction activities that impacted several fossil localities in the Wahweap Formation. Newly hired paleontological staff conducted two seasons of field inventory (2022?2023), relocating as many of Eaton?s sites as possible and recording new fossil occurrences along the way. In this timeframe, BRCA paleontologists encountered more than 150 localities. They also conducted detailed literature review, examined the park?s paleontological collections data, and cultivated partnerships with outside researchers to better comprehend the current state and future potential of the park?s paleontological resources. This document synthesizes the total current body of knowledge on paleontological resources at BRCA to create a comprehensive paleontological inventory report. It combines historical data from the scientific literature, previous work conducted in the park, and recent fieldwork to cover BRCA?s geologic history and fossil diversity and the history of paleontological study, education, and resources management in the park.
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