for why do we need them

... feeling of “doing computing” to users Users are aware of interacting with a computer and interaction is purposeful: for exchanging information, for getting work done, for learning, for play or ... physical world artifacts that we all “interact” with as we use them in familiar human activities A simple example is a set of car keys that help us track them so we can find them if they are lost Another ... just for exploring When we drive a car we are using the car’s built-in computer and maybe even a GPS, but we not think of ourselves as “doing computing.” Tscheligi (2005) paraphrases Mark Weiser:...

Ngày tải lên: 15/08/2014, 21:28

... measures was performed, resulting in 14 higher-performing teams and 13 lower-performing teams when measured by Performance Score, and 18 higher-performing teams and nine lower-performing teams ... mental models were rather small (Table 3) To further examine differences between higher and lower performing teams, t- tests were performed with both performance indicators (Performance Score ... relation to information exchange, where higher-performing teams showed more information exchange than lowerperforming teams This result supports findings that information exchange is important for effective...

Ngày tải lên: 13/08/2014, 23:20

... Element Need Statement in the military) gets the process rolling and identifies a problem for which a solution in the form of a system (new or improved) is needed This document supports and documents ... discrete mathematics The purpose of the discrete mathematics is to demonstrate the mathematical rigor for which systems engineering must strive and to provide a language with which we can discuss ... is appropriate for use with this book is available via the web: http:// www.vitechcorp.com) takes the tedium out of performing these systems engineering activities as well as reinforcing the basic...

Ngày tải lên: 03/04/2014, 12:22

... Mackinnon A: Why are we weighting? The role of importance ratings in quality of life measurement Qual Life Res 2001, 10:579-585 McGrath C, Bedi R: Why are we "weighting"? An assessment of a self-weighting ... as well as its' predictive and discriminant power, MCI items are often 'relevance scored' using regression weights (a unit-weighted sum across all items) Within the clinical literature, other forms ... contribute unique predictive power Association between Item Ratings Item ratings are highly correlated, canceling random measurement error Item ratings are skewed due to differential content...

Ngày tải lên: 20/06/2014, 16:20

... Madam Chong Wei Leng for their stimulating support I have furthermore to thank my friends Li Lingzi, Li Ting, Khoo Hooi Ling, Cao ii Jinxin, Cao Zhi, Wang Huiqiu, Dong Meng and Bian Wen for their ... et al, 2003) Therefore, it is worth exploring the alternative formulation and algorithm for the SCNE models The SCNE models (Nagurney, et al., 2002; Dong et al., 2004) are formulated by variational ... nowadays However, these SCNE models were formulated by VI formulations and solved by the modified projection method While implementing the modified projection method, a predetermined step size is needed...

Ngày tải lên: 12/09/2015, 08:18

... values for < n < ∞ and for −∞ < n < −3 The discrete-time sequence x2 (n) given below is a causal sequence In this form for representing x2 (n), it is implied that x2 (n) = for −∞ < n < and also for ... to unforeseen factors are equally possible in both cases If we are using computers to analyze, 24 INTRODUCTION design, and simulate these filters, we can assume even double-precision format for ... or negative values, we have the finite number of values, represented in binary form and in their equivalent decimal form Note that a 4-bit binary form can represent values between − and at 15 distinct...

Ngày tải lên: 13/09/2012, 10:21

... SAE 661b standard is done at 200jF, the wear rate is often given by G=oPt and presented in the form o=G/(Pt) Again, to be practical the wear rate divided by the product horsepower hours (hp hr) ... design formulas for the major types of clutches and brakes listed in the contents and to display an example of their use in a typical design Some pertinent computer programs for longer formulas ... megapascals (MPa) horsepower (hp) kilowatts (kW) pounds (lb, force) Newtons (N) To megapascals (MPa) pounds/in2 (psi) kilowatts (kW) horsepower (hp) Newtons (N) pounds (lb, force) Multiply by 0.00689476...

Ngày tải lên: 20/10/2012, 09:58

... (CI) For continuous variables, a linear regression model was applied Stepwise multivariate regression models were applied to adjust for confounding of covariates Tests for trends were performed ... factors for lung function measurements, gender and age, were not controlled for as the cohort only consisted of women of the same age Subjects were asked to inhale to total lung capacity before ... measurements in 1968-1969; Body height and body weight were measured with the subjects wearing only briefs Body mass index (BMI) was calculated by dividing body weight in kg by m² of body height Mental...

Ngày tải lên: 31/10/2012, 15:34

... processing needed to translate these signals into the digital domain for modulation onto a radio carrier We discuss the different requirements for RF processing and baseband processing: How we manage ... to filter performance On the other hand, as we move to higher frequencies, we have access to more bandwidth For example, we have only 370 kHz of bandwidth available at long wave; we have 270 GHz ... achieved at baseband, reducing the requirement for RF filters and relaxing the need for frequency stability The need for backward compatibility, however, makes this benefit harder to realize 2G...

Ngày tải lên: 20/08/2013, 14:10

... values for < n < ∞ and for −∞ < n < −3 The discrete-time sequence x2 (n) given below is a causal sequence In this form for representing x2 (n), it is implied that x2 (n) = for −∞ < n < and also for ... to unforeseen factors are equally possible in both cases If we are using computers to analyze, 24 INTRODUCTION design, and simulate these filters, we can assume even double-precision format for ... cos(ω0 n) for different values of ω0 between and 2π frequency In Figure 1.10 we have plotted the DT sequences as ω0 attains a few values between and 2π, to illustrate this property We will elaborate...

Ngày tải lên: 29/09/2013, 21:20

... audience target for these efforts is managers throughout the company, not just a small group of "mental model experts." As for the skills themselves, we will look closely at them shortly within ... mental models "We don't have any anointed mental models," says O'Brien, "we have a philosophy of mental modeling If we went out to the field and said, 'this is the authorized mental model for handling ... customers were sophisticated engineers who forgave bugs—in part because they could fix them themselves The Apple Ill's largest market, consumers and business people, was much more unforgiving They needed...

Ngày tải lên: 17/10/2013, 18:20

... looking for is a solution that does the following: " Addresses their real day-to-day needs " Allows them to perform their tasks and work in a natural way " Contains the key features that they need ... architecture and the need to identify it as a source of information for conceptual design " The enterprise architecture is the set of standards for: $ $ A key source of information that will contribute ... most need improvement This preliminary effort need not be overly precise or detailed, and senior managers can usually provide enough information to assist team members in understanding the performance...

Ngày tải lên: 18/10/2013, 18:15

... this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Microsoft Corporation If, however, ... FrontPage, Microsoft Press, MSDN, MS-DOS, PowerPoint, Visio, Visual Basic, Visual C++, Visual InterDev, Visual J++, Visual Studio, Win32, Windows, and Windows NT are either registered trademarks ... class and its interface does not match the one you need For example, an OLE DB provider is an adapter An OLE DB provider presents data to OLE DB consumers in a universal format independent of the...

Ngày tải lên: 19/10/2013, 02:15

... is a need to formalize the patterns discovered to allow for their correct use Note that this course is not recommending a methodology or process for creating logical and physical designs For ease ... the ATM system is not accessible from the Web, there is no need for a Web services facade layer Consequently, the appropriate architecture template for the ATM system is a Business template The ... this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Microsoft Corporation If, however,...

Ngày tải lên: 19/10/2013, 02:15

... Animals haue no rights at all I don't medn we should be cruel to them fctr no redson I eat animals I wear dnimals I depend on drugs tuhich haue been testedon them I medn, if testingmedicineson ... carefully and answer these questions: l Why most people not receivenew rreatmentsfor HIV? How does the spread of HIV affect a country's economy? What would help to slow down the spreadof HIV infection? ... wasthe rightanswer me for (Fifteen-year-old rl) gi d a I J rt I F: f d {f A tl Discussion d Do you think the girl acted responsibly ?Why / Why not? Here is the opinion of a retired British doctor She...

Ngày tải lên: 01/11/2013, 16:20

... Parameters Power We now examine the output power in a system First, we must distinguish between average power and peak power Communication equipment and frequency modulation (FM) broadcasting, for example, ... strainers we use to protect them We can think of a trade-off situation in which it is possible to produce the needed output power for example, with an oversized TWT amplifier that does not need any ... seen in Figure 2.2, we start losing output power Although the plot is for the maximum power, it is rather correct for sensible power, too, if scaled by about 1/100 Alternatively, we get more antenna...

Ngày tải lên: 05/11/2013, 12:15

... Load Shedding for Aggregation Queries 1.1 Problem Formulation 1.2 Load Shedding Algorithm 1.3 Extensions Load Shedding in Aurora Load Shedding for Sliding Window Joins Load Shedding for Classification ... Simulationresults for online Bayesian learning: (left) KL distance between the conditional probabilities for the networks Bol( k ) and Bb, for three nodes (right) KL distance between the conditional ... e; We note that the above definition of micro-cluster maintains similar summary information as the cluster feature vector of [24], except for the additional information about time stamps We will...

Ngày tải lên: 08/11/2013, 02:15

... that this maintenance process needs to be performed both for the clustering and classificiation algorithms with minor differences Therefore, we present the results for the case of clustering By ... statistics) for futuristic query processing in data streams Statistical Forecasting: Since micro-clusters contain temporal and condensed information, they can be used for methods such as statistical forecasting ... data, we believe that they should perform effectively for some data sets with stable distribution over time An example of such a data set is the KDD-CUP'98 Charitable Donation data set We will...

Ngày tải lên: 08/11/2013, 02:15