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On the limits of computations with the floor function

László Babai, Bettina Just, Friedhelm Meyer auf der Heide
1988 Information and Computation  
Up to now, few models of computation with the power of evaluating discontinuous functions have been analyzed and few of their lower bounds or results on the decidability of languages are known.  ...  These trees operate on real numbers and are able to compare real numbers, to evaluate functions on real numbers, and to evaluate certain discontinuous functions like the '?loor function."  ...  We now define the computational model of "analytic computation trees" (ACTS). Informally, ACTS admit any function which composes the floor function and arbitrary analytic functions.  ... 
doi:10.1016/0890-5401(88)90031-4 fatcat:zf2hfokcbjdejnen5lgbctexk4

Vibration Analysis and Design of a Structure Subjected to Human Walking Excitations

M. Setareh, M. Lovelace
2010 Shock and Vibration  
Conclusions are made on the validity of each forcing function studied here.  ...  A series of dynamic tests were conducted on the building floor to identify the dynamic properties of the structure and these were then used to update the original computer model.  ...  Any opinions, findings, and conclusions expressed in this paper are those of the authors and do not necessarily reflect the view of the National Science Foundation.  ... 
doi:10.1155/2010/257173 fatcat:53f74trhpfbsfflta3cs4fgbuy

Pelvic floor dynamics during high-impact athletic activities: A computational modeling study

Nicholas Dias, Yun Peng, Rose Khavari, Nissrine A. Nakib, Robert M. Sweet, Gerald W. Timm, Arthur G. Erdman, Timothy B. Boone, Yingchun Zhang
2017 Clinical Biomechanics  
Background-Stress urinary incontinence is a significant problem in young female athletes, but the pathophysiology remains unclear because of the limited knowledge of the pelvic floor support function and  ...  The aim of our study is to develop an advanced computer modeling tool to better understand the dynamics of the internal pelvic floor during highly transient athletic activities.  ...  Acknowledgments Author Manuscript Author Manuscript Author Manuscript Author Manuscript This work was supported in part by National Institute of Health (NIH) DK082644 and the University of Houston.  ... 
doi:10.1016/j.clinbiomech.2016.11.003 pmid:27886590 pmcid:PMC5519824 fatcat:ykh7lswohnhj3irhou3xev5fse

Developing Seismic Risk Prediction Functions for Structures

Naveed Ahmad, Qaisar Ali, Muhammad Adil, Akhtar Naeem Khan
2018 Shock and Vibration  
Experimental investigation of one-third scaled model, tested on shake table, is performed in order to obtain lateral strength and drift limits for stone masonry and develop damage scale for performance-based  ...  Future development of the methodology is required with additional experimental tests on rubble stone masonry material in order to increase confidence in future applications.  ...  Disclosure The research work presented herein is the further extension of the methodology, adopted for the fragility functions derivation under the EU funded project SYNER-G (Systematic Seismic Vulnerability  ... 
doi:10.1155/2018/4186015 fatcat:ftnq3cxt5vbdlkvunxvi5rrmdi

Page 1334 of American Society of Civil Engineers. Collected Journals Vol. 127, Issue 11 [page]

2001 American Society of Civil Engineers. Collected Journals  
; 0, and Xm,.. = Maximum limit of the RMS displacement and the max- imum displacement of the actuator piston relative to the third floor, respectively; o, and <,,,.. = maximum limit of the RMS absolute  ...  In this study, the population size has been taken as 100 members (designs). An upper limit on the number of gen-  ... 

Floors number influence on the instability parameter of reinforced concrete frame-braced buildings

2019 Revista IBRACON de Estruturas e Materiais  
It follows an analytical study that led to the derivation of a method for determining the limit α1 as a function of the floors number and the relation between bending and shear stiffness.  ...  This work aims to investigate the floors number influence on the instability parameter limit α1 of reinforced concrete frame-braced buildings; it succeeds another work in this field of knowledge, in which  ...  Concerning to the instability parameter as a function of the floors number, ABNT [3] determines variable limits only for buildings with less than four floors.  ... 
doi:10.1590/s1983-41952019000500005 fatcat:bpsr7k64crex3lkjxqy2d7nn3i

Preoperative psychometric properties of visual analog scale asessments for function, pain, and strength compared with legacy upper extremity outcome measures in glenohumeral osteoarthritis

Alexander Beletsky, Yining Lu, Benedict U. Nwachukwu, Evan Polce, Bhargavi Maheshwer, Jorge Chahla, Brian Forsythe, Brian J. Cole, Nikhil N. Verma
2020 JSES International  
None of the VAS measures were susceptible to significant floor or ceiling effects preoperatively. The VAS instruments along with SANE and PROMIS UE were the most time-efficient measures.  ...  None of the VAS instruments in our study demonstrated preoperative floor effects (7.1%-8.6%) or ceiling effects (0.0%-4.3%).  ...  Pictured are examples of how each VAS instrument appears during computer adaptive testing, with a color scale correlating to the level of pain experienced helping the patient best estimate their strength  ... 
doi:10.1016/j.jseint.2020.03.006 pmid:32939466 pmcid:PMC7478988 fatcat:dsncvfx5mveptk4hzgkpv2moqm

Reduction of the error floor of binary fsk by nonlinear frequency discriminators

A.F. Molisch, R. Petrovic
2003 IEEE Transactions on Wireless Communications  
We consider the error floor of binary FSK due to intersymbol interference in time-dispersive mobile radio channels, with a limiter-discriminator-integrator detector.  ...  Abstract We consider the error floor of binary FSK due to intersymbol interference in time-dispersive mobile radio channels, with a limiter-discriminator-integrator detector.  ...  literature, can be considered a limiting case of this arrangement.  ... 
doi:10.1109/twc.2003.817414 fatcat:gkrktwgwwjdflecwde2y2opvzy

Parallel computations of the step response of a floor heater with the use of a graphics processing unit. Part 2: results and their evaluation

J. Gołębiowski, J. Forenc
2013 Bulletin of the Polish Academy of Sciences: Technical Sciences  
The computations results were verified through comparing them with the solution obtained with the use of a commercial program - NISA.  ...  The analysis of the use of a graphics processing unit in numerical computations based on the conjugate gradient method was done.  ...  The paper was prepared at the Bialystok University of Technology within the framework of the S/WE/1/2013 project sponsored by the Ministry of Science and Higher Education.  ... 
doi:10.2478/bpasts-2013-0102 fatcat:56ugmps5k5gungd44r6ohlkh5u

Adaptable Low Cost Shop-Floor Control System for Central and East European Companies [chapter]

Joachim Uhl, Zbigniew Smalec, Jaroslaw Chrobot, Jaroslaw Rakowski
1997 Information Infrastructure Systems for Manufacturing  
This paper contains the goals and current results of the Copernicus project "Adaptable Low Cost Shop-Floor Control System" supported by the European Community.  ...  The goal of this project is to develop a low-cost shop-floor control system which should be adaptable in many different Central and East European companies.  ...  Therefore a software solution is planned with limited functionality with only the minimum necessary functionality.  ... 
doi:10.1007/978-0-387-35063-9_31 fatcat:qe4b6qdmkfeqtkisasrn4zfgla

Page 1692 of American Society of Civil Engineers. Collected Journals Vol. 109, Issue 7 [page]

1986 American Society of Civil Engineers. Collected Journals  
Maximum deflections were computed by both procedures for 30 floors with an applied point load, the magnitude of which was based on bare-joist limitations.  ...  Both the difference in floor response between bare-joist procedures and comprehensive meth- odology and the difference in response as a function of load type bring up the question of whether presently  ... 

Exploration of "What-If" Scenarios: A Prototype for Research Buildings at Stanford's School of Medicine

Felicia Cleper-Borkovi, Sudha Hajela, Alexander Khainson, Zachary Deretsky, Michael Butler
2015 Conference On Spatial Information Theory  
to address a real and urgent need for a dynamic tool which objectivizes the sequence of relocation of functional spaces from existing, aging facilities into new buildings, over time. 1.2 Statement of the  ...  In addition there were functional relationship constraints, commitments associated with Principal Investigators (PIs) recruitment, planning requirements and further influences from the unpredictability  ...  Prototypical Research Building Baseline Option 1 with skylights on Floor 1. D.  ... 
dblp:conf/cosit/Cleper-BorkoviH15 fatcat:o2alkh44zfcn5n3bbidxvrn3ku

"3-D": An interactive computer-graphics program for plotting scores on three coordinate axes

Wayne P. Aspey, Russell W. Zears, James E. Blankenship
1977 Behavior Research Methods & Instrumentation  
Program "3-D" is an interactive computer-graphics package designed to assist the researcher in achieving a functional, mathematically accurate, and aesthetically pleasing graphical representation of data  ...  Program "3-D" consists of a main program that drives nine subroutines and interfaces with the user.  ...  (-26.0, 5.0) and (6.0,5.0) provide the best maximum limit X and Y axes shift to the right with the same floor tilt as in C.  ... 
doi:10.3758/bf03213998 fatcat:u6am3p3w3vabnkfav5lr23jquu

Floors number influence on the instability parameter of reinforced concrete wall- or core-braced buildings

R. J. Ellwanger
2013 Revista IBRACON de Estruturas e Materiais  
This work aims to investigate the floors number influence on the instability parameter limit α1 of buildings braced by reinforced concrete walls and/or cores.  ...  It follows a detailed analytical study that led to the derivation of equations for the limit α1 as functions of the floors number; a series of examples is presented to check their accuracy.  ...  At first, a computer aid method, based on the discrete model of Beck and König [1] , is developed in order to determine the a 1 limits for buildings with any number of floors.  ... 
doi:10.1590/s1983-41952013000500006 fatcat:dj5nwtom6je5xavlahurrqeq4e

Performance of PROMIS Physical Function, Pain Interference, and Depression Computer Adaptive Tests Instruments in Patients Undergoing Meniscal Surgery

Yining Lu, Alexander Beletsky, Benedict U. Nwachukwu, Bhavik H. Patel, Kelechi R. Okoroha, Nikhil Verma, Brian Cole, Brian Forsythe
2020 Arthroscopy, Sports Medicine, and Rehabilitation  
To compare the performance of the Patient-Reported Outcomes Measurement Information System (PROMIS) physical function (PF), pain interference (PIF), and depression computer adaptive tests (CAT) relative  ...  PROMIS PF yielded high-moderate to high correlations with the IKDC and KOOS subscales (r = 0.61 to 0.73), demonstrating similar performance to the IKDC.  ...  Acknowledgments The authors acknowledge Elizabeth Chang, BS, for her help with data collection in the generation of this manuscript.  ... 
doi:10.1016/j.asmr.2020.04.012 pmid:33134980 pmcid:PMC7588601 fatcat:aqrwk64ebzecflng7cm4aaxrc4
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