Give Me Shelter: Responding to Milwaukee County's affordable housing challenges

Few issues better capture the complex and controversial nature of urban problems facing Metropolitan Milwaukee than the issue of affordable housing. Encompassing matters of racial segregation, poverty and failed public-private partnerships, the Milwaukee metro area's struggle to provide a safe, decent and affordable supply of housing to low-income citizens has been a difficult one. Even before the national economic meltdown, countless reports documented the severe housing burden facing low-income citizens in Milwaukee County. That burden, combined with the scarcity of affordable housing in suburban parts of southeast Wisconsin, has cemented the region's place as one of the most racially segregated in the country. In today's economy, those problems have intensified

Calibration of Computational Models with Categorical Parameters and Correlated Outputs via Bayesian Smoothing Spline ANOVA

It has become commonplace to use complex computer models to predict outcomes in regions where data does not exist. Typically these models need to be calibrated and validated using some experimental data, which often consists of multiple correlated outcomes. In addition, some of the model parameters may be categorical in nature, such as a pointer variable to alternate models (or submodels) for some of the physics of the system. Here we present a general approach for calibration in such situations where an emulator of the computationally demanding models and a discrepancy term from the model to reality are represented within a Bayesian Smoothing Spline (BSS) ANOVA framework. The BSS-ANOVA framework has several advantages over the traditional Gaussian Process, including ease of handling categorical inputs and correlated outputs, and improved computational efficiency. Finally this framework is then applied to the problem that motivated its design; a calibration of a computational fluid dynamics model of a bubbling fluidized which is used as an absorber in a CO2 capture system

Repeated boundary slopes for 2-bridge knots

We investigate the question of when distinct branched surfaces in the complement of a 2-bridge knot support essential surfaces with identical boundary slopes. We determine all instances in which this occurs and identify an infinite family of knots for which no boundary slopes are repeated

Working Self Concepts: the Impact of Work Based Learning On Self Identity Amongst Senior HRM/HRD Practitioners

This paper explores the experiences of senior HRM/D managers and strategic line managers who have engaged with a Work Based Learning (WBL) programme, and builds on earlier work by Nichol and Williams (2012) who explored the professional identity of HR/HRD practitioners. The paper seeks to understand the personal impact of this combination of work place yet externally derived learning process on self-identity since this will have lessons for the learners, for the organisation, and for providers of such programmes. The basis of this qualitative, interpretive, paper is a series of one-to-one semi-structured interviews with senior practitioners from across the public, private and not-for-profit spectrum. Analysis and interpretation are guided equally by themes arising from the data and by a priori knowledge of existing theoretical frameworks. The concepts of self-identity operate at multiple levels, which Lord and Brown (2004) refer to as the Individual, Interpersonal and Collective levels of our ‘Working Self Concept (WSC)’. Their model demonstrated how successful leadership processes occur indirectly through follower self-identities, and this current research adapts that model to argue that the WBL process similarly needs to align with participants’ self-identity in order to ensure success. There is evidence of positive impacts on self-views at all levels with affective and behavioural changes that enhanced performance as a result of engagement in WBL. Increased confidence in their own value to their respective organisations, and improved belief in the legitimacy of their accumulated knowledge skills and experience enabled them to further contribute to organisational goals

Dorsal and ventral stimuli in cell–material interactions: effect on cell morphology

Cells behave differently between bidimensional (2D) and tridimensional (3D) environments. While most of the in vitro cultures are 2D, most of the in vivo extracellular matrices are 3D, which encourages the development of more relevant culture conditions, seeking to provide more physiological models for biomedicine (e.g., cancer, drug discovery and tissue engineering) and further insights into any dimension-dependent biological mechanism. In this study, cells were cultured between two protein coated surfaces (sandwich-like culture). Cells used both dorsal and ventral receptors to adhere and spread, undergoing morphological changes with respect to the 2D control. Combinations of fibronectin and bovine serum albumin on the dorsal and ventral sides led to different cell morphologies, which were quantified from bright field images by calculating the spreading area and circularity. Although the mechanism underlying these differences remains to be clarified, excitation of dorsal receptors by anchorage to extracellular proteins plays a key role on cell behavior. This approach—sandwich-like culture—becomes therefore a versatile method to study cell adhesion in well-defined conditions in a quasi 3D environment

Standardization of XML Database Exchanges and the James Webb Space Telescope Experience

Personnel from the National Aeronautics and Space Administration (NASA) James Webb Space Telescope (JWST) Project have been working with various standard communities such the Object Management Group (OMG) and the Consultative Committee for Space Data Systems (CCSDS) to assist in the definition of a common extensible Markup Language (XML) for database exchange format. The CCSDS and OMG standards are intended for the exchange of core command and telemetry information, not for all database information needed to exercise a NASA space mission. The mission-specific database, containing all the information needed for a space mission, is translated from/to the standard using a translator. The standard is meant to provide a system that encompasses 90% of the information needed for command and telemetry processing. This paper will discuss standardization of the XML database exchange format, tools used, and the JWST experience, as well as future work with XML standard groups both commercial and government

Organic Indoor Location Discovery

We describe an indoor, room-level location discovery method based on spatial variations in "wifi signatures," i.e., MAC addresses and signal strengths of existing wireless access points. The principal novelty of our system is its organic nature; it builds signal strength maps from the natural mobility and lightweight contributions of ordinary users, rather than dedicated effort by a team of site surveyors. Whenever a user's personal device observes an unrecognized signature, a GUI solicits the user's location. The resulting location-tagged signature or "bind" is then shared with other clients through a common database, enabling devices subsequently arriving there to discover location with no further user contribution. Realizing a working system deployment required three novel elements: (1) a human-computer interface for indicating location over intervals of varying duration; (2) a client-server protocol for pre-fetching signature data for use in localization; and (3) a location-estimation algorithm incorporating highly variable signature data. We describe an experimental deployment of our method in a nine-story building with more than 1,400 distinct spaces served by more than 200 wireless access points. At the conclusion of the deployment, users could correctly localize to within 10 meters 92 percent of the time