Search results
(8,441 - 8,460 of 9,615)
Pages
- Title
- ENHANCING PRIVACY AND SECURITY IN IOT-BASED SMART HOME
- Creator
- Du, Haohua
- Date
- 2019
- Description
-
The IoT-based smart home is envisioned as a system that augments everyone’s daily life. In the past few years, the smart home attracted...
Show moreThe IoT-based smart home is envisioned as a system that augments everyone’s daily life. In the past few years, the smart home attracted immense attention from the industrial organizations and has been considered as one of the principal pillars of the fourth industrial revolution. However, while the rapidly increasing number of Internet-connected smart devices expends the functionalities of smart homes, it also raises substantial security and privacy concerns.Commonly, a smart home system is composed of three major components, smart devices, communication among devices, and smart applications connecting the devices. Thus, this dissertation aims to enhance the security and privacy of the smart home system without weakening its functionalities from the perspectives of these three components. First, I improve the security of smart devices within the smart home by monitoring their behaviors based on the contextual environment. Then, I enhance the security of the communications among the devices through visible light communication, whose receivers have to be physically visible to senders and avoid possible eavesdropping. Finally, I study two popular smart applications – the augmented reality assistant and the cloud-based surveillance system, to discuss how to define privacy, how to reduce the leakage, and how to balance the privacy and security in the smart home. This dissertation proposes the mechanisms for each component, respectively, and it also implements the design in the real-world for evaluating their effectiveness and efficiency.
Show less
- Title
- Kinetic and Structural Characterization of the Vibrio cholerae Flavin Transferase ApbE
- Creator
- Fang, Xuan
- Date
- 2019
- Description
-
Cholera has long been a global concern and in the past decades traditional antibiotic treatments have failed due to the emergence of the...
Show moreCholera has long been a global concern and in the past decades traditional antibiotic treatments have failed due to the emergence of the antibiotic-resistance of its causative agent, V. cholerae. The resistance is mainly supported by a transmembrane electrochemical gradient of Na+ produced by the respiratory complex Na+-NQR coupled with an internal electron transfer pathway. The assembly and function of Na+-NQR is fulfilled by ApbE, the only known flavin transferase which covalently attaches two FMN molecules to the complex as part of its electron transport chain. Hence, ApbE is closely associated with the cause of antibiotic resistance. Because it does not have any human homologues, ApbE becomes an excellent drug target. In this work, we have investigated the physical properties of the enzyme and clarified its substrate specificity and pH dependence. For instance, our experiments indicate that divalent cations are essential for ApbE function, and that the selectivity depends largely on the size and the coordination sphere of the cation. Our data also show that ApbE regulation by pH, ADP and potassium is an important mechanism that enhances the adaptation, survival and colonization of V. cholerae in the small intestine. Moreover, pH dependence, mutagenesis, and steady-state kinetic studies have led us to identify the conserved His257 as a residue with dual roles: substrate binding and catalysis. Furthermore, bi-substrate kinetic studies have also revealed that ApbE follows a random Bi Bi mechanism. Together with structural studies, we propose a reaction mechanism where His257 functions as a base, shedding light into the understanding of the ApbE family.
Show less
- Title
- DIAGNOSING AND TREATING ADHD: CLINICIAN CHARACTERISTICS, METHODS OF DIAGNOSIS, DIAGNOSTIC RATES, AND TREATMENT RECOMMENDATIONS
- Creator
- Haak, Christopher Luke
- Date
- 2019
- Description
-
Attention-deficit/hyperactivity disorder (ADHD) is one of the top five most common referrals among all neuropsychologists (Sweet et al. 2015)...
Show moreAttention-deficit/hyperactivity disorder (ADHD) is one of the top five most common referrals among all neuropsychologists (Sweet et al. 2015) and continues to elicit public and professional concern about over-diagnosis in children (Sciutto & Eisenberg, 2007) and under-diagnosis in adults (Asheron et al., 2012; Kooji et al., 2010). In recent years, the prevalence of ADHD has increased (Polanczyk et al., 2007 & 2014, Thomas et al., 2015). It is unclear what is driving these changes though changes in criteria may be playing a role (van de Voort et al., 2014). Further, there has been little research on whether professional training, beliefs, and practice factors can influence the likelihood to diagnose ADHD. The purpose of this study was to examine the extent to which neuropsychologists’ professional characteristics, training, and beliefs about ADHD diagnosis and treatment influence their likelihood to diagnose ADHD. The study also evaluated whether there are differences in assessing and treating ADHD based upon the client population focus (child, lifespan, or adult) of neuropsychologists. Participants in this study were 106 neuropsychologists from across the United States and Canada who were recruited through neuropsychology listservs to participate in an online survey. Results indicated that population focus was associated with significant differences in approach to diagnosing and treating ADHD, with child- and lifespan-focused neuropsychologists reporting higher rates of ADHD diagnosis. Additionally, having a higher percent of clinical cases in which ADHD is a referral question and greater self-reported adherence to following full diagnostic criteria for making a diagnosis were associated with higher ADHD diagnostic rates, controlling for age, gender, ethnicity, and other professional characteristics. This study is among the first to examine specific clinician factors impacting diagnostic rates and its findings have several implications for practice and research.
Show less
- Title
- WIND MICRO-CLIMATE CONFORMATION IN HOT DRY CITIES; RIYADH
- Creator
- Alhawsah, Saeed Idris
- Date
- 2019
- Description
-
Recently, the transformation in urban development in Saudi Arabia has caused abrupt and sporadic change to its desert climate. Careful...
Show moreRecently, the transformation in urban development in Saudi Arabia has caused abrupt and sporadic change to its desert climate. Careful environmental consideration of vernacular architecture practices is lost by the vast modernization. The significant changes of modernization contain desertification, sand rapping due to massive urban construction, and urban heat islands, all that has created a severe issue with sandstorms. Saudi’s modernization changed sandstorms phenomena from its seasonal occasions to a frequent rapid increase as a result of the urban inability to maintain its naturally mild and soothing condition. All the global incidents from the natural refugees in Gobi Desert, China, to the 1930s U.S. dustbowl are evident to the urban environmental disturbance. This research is an environmental investigation to reduce the sandstorm effects in Saudi Arabia through designing multiple territorial landscape interventions to filter out the sandstorms and trap its sediments to avoid reoccurring sandstorms.
Show less
- Title
- Wireless Body Sensor Network for Tracking Human Mobility using Long Short-Term Memory Neural Network for Classification
- Creator
- Gupta, Saumya
- Date
- 2019
- Description
-
A large number of sensors are used without justification of the number chosen or placement choice. Many papers about body sensor networks...
Show moreA large number of sensors are used without justification of the number chosen or placement choice. Many papers about body sensor networks explore how to capture a type or types of motion, but all their sensors are placed in different locations; making their algorithms very specific to that movement. In this research, we explore the enhancement of human activity classification algorithm using long short-term memory (LSTM) neural network and wearable sensor network. There are five identical nodes used in the body sensor network to collect data. Each node incorporates an ESP8266 Microcontroller with Wi-Fi which is connected to an inertial measurement unit consisting of triple axis accelerometer and gyroscope sensor board. An analysis on the accuracy that each sensor node provides separately and in different combinations has been conducted to allow future research to focus their positioning in optimal positions. A Robot Operating System (ROS) central node is used to illustrate the in-built multi-threading capability. For demonstration, the positions chosen are waist, ankles and wrists. The raw sensor data can be observed on screen while it is being labelled live to create fitting dataset for developing an artificial neural network. Expectation is that increasing the number of sensors should raise the overall accuracy of the output but that isn’t the case observed, positioning of the sensor is pertinent to improvement. These platforms can be further extended to understand different motions and different sensor positions, also expanded to include other sensors.
Show less
- Title
- Main Building entrance, Armour Institute of Technology, Chicago, Illinois, ca 1920s
- Date
- 1920-1929
- Description
-
Photograph of the east entrance to Main Building on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date...
Show morePhotograph of the east entrance to Main Building on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date of photograph unknown. Date indicated is an estimate.
Show less - Collection
- C.V. Smith photographs, circa 1900-1929
- Title
- Armour Mission and Main Building, Armour Institute of Technology, Chicago, Illinois, ca. 1900
- Date
- 1900
- Description
-
Photograph of the Armour Institute of Technology campus, including the Armour Mission and Main Building, with part of Armour Flats visible...
Show morePhotograph of the Armour Institute of Technology campus, including the Armour Mission and Main Building, with part of Armour Flats visible along Federal Street to the south. Photographer unknown, possibly C.V. Smith. Date of photograph unknown. Date indicated is an estimate.
Show less - Collection
- C.V. Smith photographs, circa 1900-1929
- Title
- Generalized Fréchet Bounds for Cell Entries in Multidimensional Contingency Tables, Special Volume in honor of memory of S.E.Fienberg
- Creator
- Richards, Donald, Uhler, Caroline
- Description
-
We consider the lattice, L, of all subsets of a multidimensional contingency table and establish the properties of monotonicity and...
Show moreWe consider the lattice, L, of all subsets of a multidimensional contingency table and establish the properties of monotonicity and supermodularity for the marginalization function, n(·), on L. We derive from the supermodularity of n(·) some generalized Fr ́echet inequalities comple- menting and extending inequalities of Dobra and Fienberg. Further, we construct new monotonic and supermodular functions from n(·), and we remark on the connection between supermodularity and some correlation inequalities for probability distributions on lattices. We also apply an inequal- ity of Ky Fan to derive a new approach to Fr ́echet inequalities for multidimensional contingency tables.
Show less - Collection
- Journal of Algebraic Statistics
- Title
- Maximal Length Projections in Group Algebras with Applications to Linear Rank Tests of Uniformity
- Creator
- Bargagliotti, Anna E., Orrison, Michael
- Description
-
Let G be a finite group, let CG be the complex group algebra of G, and let p ∈ CG. In this paper, we show how to construct submodules S of CG...
Show moreLet G be a finite group, let CG be the complex group algebra of G, and let p ∈ CG. In this paper, we show how to construct submodules S of CG of a fixed dimension with the property that the orthogonal projection of p onto S has maximal length. We then provide an example of how such submodules for the symmetric group Sn can be used to create new linear rank tests of uniformity in statistics for survey data that arises when respondents are asked to give a complete ranking of n items.
Show less - Collection
- Journal of Algebraic Statistics
- Title
- Connectivity for 3 x 3 x K contingency tables
- Creator
- Sumi, Toshio, 2012
- Description
-
We consider an exact sequential conditional test for three-way conditional test of no interaction. At each time τ, the test uses as the...
Show moreWe consider an exact sequential conditional test for three-way conditional test of no interaction. At each time τ, the test uses as the conditional inference frame the set F(Hτ) of all tables with the same three two-way marginal tables as the obtained table Hτ . For 3 × 3 × K tables, we propose a method to construct F(Hτ) from F(Hτ−1). This enables us to perform efficiently the sequential exact conditional test. The subset Sτ of F (Hτ ) consisting of s + Hτ − Hτ −1 for s ∈ F(Hτ−1) contains Hτ , where the operations + and − are defined elementwise. Our argument is based on the minimal Markov basis for 3 × 3 × K contingency tables and we give a minimal subset M of some Markov basis which has the property that F (Hτ ) = {s − m | s ∈ Sτ , m ∈ M}.
Show less - Collection
- Journal of Algebraic Statistics
- Title
- Matrix Completion for the Independence Model
- Creator
- Kubjas, Kaie, Rosen, Zvi
- Description
-
We investigate the problem of completing partial matrices to rank-one matrices in the standard simplex ∆mn−1. The motivation for studying this...
Show moreWe investigate the problem of completing partial matrices to rank-one matrices in the standard simplex ∆mn−1. The motivation for studying this problem comes from statistics: A lack of eligible completion can provide a falsification test for partial observations to come from the independence model. For each pattern of specified entries, we give equations and inequalities which are satisfied if and only if an eligible completion exists. We also describe the set of valid completions, and we optimize over this set.
Show less - Collection
- Journal of Algebraic Statistics
- Title
- One example of general unidentifiable tensors
- Creator
- Chiantini, Luca, Mella, Massimiliano, Ottaviani, Giorgio
- Description
-
Abstract. Theidentifiabilityofparametersinaprobabilisticmodelisacrucialnotioninstatistical inference. We prove that a general tensor of rank 8...
Show moreAbstract. Theidentifiabilityofparametersinaprobabilisticmodelisacrucialnotioninstatistical inference. We prove that a general tensor of rank 8 in C3 ⊗ C6 ⊗ C6 has at least 6 decompositions as sum of simple tensors, so it is not 8-identifiable. This is the highest known example of balanced tensors of dimension 3, which are not k-identifiable, when k is smaller than the generic rank.
Show less - Collection
- Journal of Algebraic Statistics
- Title
- Hilbert Polynomial of the Kimura 3-Parameter Model, AS2012 Special Volume, part 1: This issue includes a second series of papers from talks, posters and collaborations resulting from and inspired by the Algebraic Statistics in the Alleghenies Conference at Penn State, which took place in July 2012.
- Creator
- Kubjas, Kaie, inspired by the Algebraic Statistics in the Alleghenies Conference at Penn State, which took place in July
- Description
-
In [2] Buczyn ́ska and Wi ́sniewski showed that the Hilbert polynomial of the algebraic variety associated to the Jukes-Cantor binary model on...
Show moreIn [2] Buczyn ́ska and Wi ́sniewski showed that the Hilbert polynomial of the algebraic variety associated to the Jukes-Cantor binary model on a trivalent tree depends only on the number of leaves of the tree and not on its shape. We ask if this can be generalized to other group-based models. The Jukes-Cantor binary model has Z2 as the underlying group. We consider the Kimura 3-parameter model with Z2 × Z2 as the underlying group. We show that the generalization of the statement about the Hilbert polynomials to the Kimura 3-parameter model is not possible as the Hilbert polynomial depends on the shape of a trivalent tree.
Show less - Collection
- Journal of Algebraic Statistics
- Title
- Main Building, Armour Institute of Technology, Chicago, Illinois, ca 1920s
- Date
- 1920-1929
- Description
-
Photograph of the east facade of Main Building on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date...
Show morePhotograph of the east facade of Main Building on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date of photograph unknown. Date indicated is an estimate.
Show less - Collection
- C.V. Smith photographs, circa 1900-1929
- Title
- Armour Mission, Armour Institute of Technology, Chicago, Illinois, ca. 1920s
- Date
- 1920-1929
- Description
-
Photograph of northeast corner of Armour Mission on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date...
Show morePhotograph of northeast corner of Armour Mission on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date of photograph unknown. Date indicated is an estimate.
Show less - Collection
- C.V. Smith photographs, circa 1900-1929
- Title
- Armour Mission, Armour Institute of Technology, Chicago, Illinois, ca. 1920s
- Date
- 1920-1929
- Description
-
Photograph of the north facade of Armour Mission on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date...
Show morePhotograph of the north facade of Armour Mission on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date of photograph unknown. Date indicated is an estimate.
Show less - Collection
- C.V. Smith photographs, circa 1900-1929
- Title
- Machinery Hall, Armour Institute of Technology, Chicago, Illinois, ca. 1920s
- Date
- 1920-1929
- Description
-
Photograph of the south facade of Machinery Hall on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date...
Show morePhotograph of the south facade of Machinery Hall on the Armour Institute of Technology campus. Photographer unknown, possibly C.V. Smith. Date of photograph unknown. Date indicated is an estimate.
Show less - Collection
- C.V. Smith photographs, circa 1900-1929
- Title
- Frank Gunsaulus, 1912
- Date
- 1912
- Description
-
Photograph of Frank Gunsaulus. Gunsaulus' "Million Dollar Sermon" inspired Philip D. Armour to fund the creation the Armour Institute of...
Show morePhotograph of Frank Gunsaulus. Gunsaulus' "Million Dollar Sermon" inspired Philip D. Armour to fund the creation the Armour Institute of Technology. Gunsaulus was the Armour Institute's first President, and served for almost 30 years.
Show less - Collection
- Biographical files collection, 1900-2014
- Title
- Armour Mission Kindergarten, Chicago, Illinois, 1894-1895
- Date
- 1894-1895
- Description
-
Photograph of the Armour Mission kindergarten students and staff for the 1894-45 school year. Instituted with the founding of the Armour...
Show morePhotograph of the Armour Mission kindergarten students and staff for the 1894-45 school year. Instituted with the founding of the Armour Mission in 1886, the kindergarten program was run by Mary Ely until it was closed in the fall of 1918. Photographer unknown.
Show less - Collection
- Office of Communications and Marketing photographs, 1905-1999
- Title
- Mathematics of Civil Infrastructure Network Optimization
- Creator
- Rumpf, Adam Andrew
- Date
- 2020
- Description
-
We consider a selection of problems from civil infrastructure network design that are of great importance in modern urban planning but have,...
Show moreWe consider a selection of problems from civil infrastructure network design that are of great importance in modern urban planning but have, until relatively recently, gone largely ignored in mathematical literature. Each of these problems is approached from the perspective of network optimization-based modeling, with a major focus placed on the development of efficient solution algorithms.We begin with a study of the phenomenon of interdependent civil infrastructure networks, wherein the functionality of one network (such as a telecommunications system) requires the input of resources from another network (such as the electrical power grid). We first consider a linear relaxation of an established binary interdependence minimum-cost network flows model, including its unique modeling applications and its use as part of a randomized rounding approximation algorithm for the mixed integer model. We also develop a generalized network simplex algorithm for the efficient solution of this generalized minimum-cost network flows problem. We then move on to consider a trilevel network interdiction game for use in planning the fortification of interdependent networks subject to targeted attacks. A variety of solution algorithms are developed for both the binary and the linear interdependence models, and the linear interdependence model is used to develop an approximation algorithm for the more computationally expensive binary model.We then develop a public transit network design model which incorporates a social access objective in addition to traditional operator cost and user cost objectives. The model is meant for use in planning minor modifications to a public transit network capable of improving equity of access to important services while guaranteeing that service levels remain within a specified tolerance of their initial values. A hybrid tabu search/simulated annealing algorithm is developed to solve this model, which is then applied to a test case based on the Chicago public transit network with the objective of improving equity of primary health care access across the city.
Show less