No Peace in the House: Witchcraft Accusations as an Old Woman\u27s Problem in Ghana

In Ghana, older women may be marginalized, abused, and even killed as witches. Media accounts imply this is common practice, mainly through stories of “witches camps” to which the accused may flee. Anthropological literature on aging and on witchcraft, however, suggests that this focus exaggerates and misinterprets the problem. This article presents a literature review and exploratory data on elder advocacy and rights intervention on behalf of accused witches in Ghana to help answer the question of how witchcraft accusations become an older woman’s problem in the context of aging and elder advocacy work. The ineffectiveness of rights based and formal intervention through sponsored education programs and development projects is contrasted with the benefit of informal conflict resolution by family and staff of advocacy organizations. Data are based on ethnographic research in Ghana on a rights based program addressing witchcraft accusations by a national elder advocacy organization and on rights based intervention in three witches camps

The Zoning in and the Zoning out of the Elderly: Emerging Community and Communication Patterns

Increasingly, senior only residences are zoning seniors out of mainstream residential areas and into segregated living and mature communities. Senior gated communities are variations on a theme of gated communities in which lifestyle is packaged and sold. Active adult retirement communities exclude the young and offer active lifestyle living, with diverse levels of senior living choices. Such an approach contrasts with policies designed to encourage aging in place. It is also distinct from Golden Age Zoning districts designed to allow affordable housing for senior citizens in a public/private partnership. Some towns have zoned public parks to establish areas for children distinct from the elderly. Simultaneously, more and more older adults are embracing the modern media environment. According to the Pew Research Center, baby boomers and seniors are the fastest growing group of social networking website users to connect with family, friends from the past, and seeking information and support with medical issues. This paper explores the person/place relationship and issues associated with design for the social needs of an aging in a media filled world

Cryptography from Information Loss

© Marshall Ball, Elette Boyle, Akshay Degwekar, Apoorvaa Deshpande, Alon Rosen, Vinod. Reductions between problems, the mainstay of theoretical computer science, efficiently map an instance of one problem to an instance of another in such a way that solving the latter allows solving the former.1 The subject of this work is “lossy” reductions, where the reduction loses some information about the input instance. We show that such reductions, when they exist, have interesting and powerful consequences for lifting hardness into “useful” hardness, namely cryptography. Our first, conceptual, contribution is a definition of lossy reductions in the language of mutual information. Roughly speaking, our definition says that a reduction C is t-lossy if, for any distribution X over its inputs, the mutual information I(X; C(X)) ≤ t. Our treatment generalizes a variety of seemingly related but distinct notions such as worst-case to average-case reductions, randomized encodings (Ishai and Kushilevitz, FOCS 2000), homomorphic computations (Gentry, STOC 2009), and instance compression (Harnik and Naor, FOCS 2006). We then proceed to show several consequences of lossy reductions: 1. We say that a language L has an f-reduction to a language L0 for a Boolean function f if there is a (randomized) polynomial-time algorithm C that takes an m-tuple of strings X = (x1, . . ., xm), with each xi ∈ {0, 1}n, and outputs a string z such that with high probability, L0(z) = f(L(x1), L(x2), . . ., L(xm)) Suppose a language L has an f-reduction C to L0 that is t-lossy. Our first result is that one-way functions exist if L is worst-case hard and one of the following conditions holds: f is the OR function, t ≤ m/100, and L0 is the same as L f is the Majority function, and t ≤ m/100 f is the OR function, t ≤ O(m log n), and the reduction has no error This improves on the implications that follow from combining (Drucker, FOCS 2012) with (Ostrovsky and Wigderson, ISTCS 1993) that result in auxiliary-input one-way functions. 2. Our second result is about the stronger notion of t-compressing f-reductions – reductions that only output t bits. We show that if there is an average-case hard language L that has a t-compressing Majority reduction to some language for t = m/100, then there exist collision-resistant hash functions. This improves on the result of (Harnik and Naor, STOC 2006), whose starting point is a cryptographic primitive (namely, one-way functions) rather than average-case hardness, and whose assumption is a compressing OR-reduction of SAT (which is now known to be false unless the polynomial hierarchy collapses). Along the way, we define a non-standard one-sided notion of average-case hardness, which is the notion of hardness used in the second result above, that may be of independent interest

Roundtable Discussion Examining Ritual, Technology, and Community in Urban Communication

Pervasive technologies that now exist in the urban setting have greatly improved the ability to connect on a macro-level, but have minimized the intimate shared experience of community on a micro level. This paper explores how technology has changed rituals within the global community and has contributed new methods to the process of human interaction. Technology’s influence on civic engagement, business meetings, shopping and socializing are examined to assess the impact technology has on human connections

Knowledge workers and job satisfaction: Evidence from Europe

This article analyzes the determinants of job satisfaction among knowledge workers (KWs). Data from a representative sample of 14,096 employed workers from the European Social Survey (2010) are used for an empirical analysis drawing on multiple binary logistic regression models. Job satisfaction among KWs in 21 EU countries is found to be explained better by non-financial characteristics than by monetary rewards. Career advancement opportunities, flexible work schedules, colleague support, and work-family relations, as well as job security, emerge as central in explaining job satisfaction among KWs in our sample. Unlike the case for other workers (OWs), opportunities for further training and career experience are not determinants of job satisfaction among KWs. Management divisions in companies employing KWs would be well-advised to take these points into account

What doesn't kill you makes you stranger: Dipeptidyl peptidase-4 (CD26) proteolysis differentially modulates the activity of many peptide hormones and cytokines generating novel cryptic bioactive ligands

Dipeptidyl peptidase 4 (DPP4) is an exopeptidase found either on cell surfaces where it is highly regulated in terms of its expression and surface availability (CD26) or in a free/circulating soluble constitutively available and intrinsically active form. It is responsible for proteolytic cleavage of many peptide substrates. In this review we discuss the idea that DPP4-cleaved peptides are not necessarily inactivated, but rather can possess either a modified receptor selectivity, modified bioactivity, new antagonistic activity, or even a novel activity relative to the intact parent ligand. We examine in detail five different major DPP4 substrates: glucagon-like peptide 1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP), peptide tyrosine-tyrosine (PYY), and neuropeptide Y (NPY), and stromal derived factor 1 (SDF-1 aka CXCL12). We note that discussion of the cleaved forms of these five peptides are underrepresented in the research literature, and are both poorly investigated and poorly understood, representing a serious research literature gap. We believe they are understudied and misinterpreted as inactive due to several factors. This includes lack of accurate and specific quantification methods, sample collection techniques that are inherently inaccurate and inappropriate, and a general perception that DPP4 cleavage inactivates its ligand substrates. Increasing evidence points towards many DPP4-cleaved ligands having their own bioactivity. For example, GLP-1 can work through a different receptor than GLP-1R, DPP4-cleaved GIP can function as a GIP receptor antagonist at high doses, and DPP4-cleaved PYY, NPY, and CXCL12 can have different receptor selectivity, or can bind novel, previously unrecognized receptors to their intact ligands, resulting in altered signaling and functionality. We believe that more rigorous research in this area could lead to a better understanding of DPP4’s role and the biological importance of the generation of novel cryptic ligands. This will also significantly impact our understanding of the clinical effects and side effects of DPP4-inhibitors as a class of anti-diabetic drugs that potentially have an expanding clinical relevance. This will be specifically relevant in targeting DPP4 substrate ligands involved in a variety of other major clinical acute and chronic injury/disease areas including inflammation, immunology, cardiology, stroke, musculoskeletal disease and injury, as well as cancer biology and tissue maintenance in aging

[Review of] S. Allen Counter. North Pole Legacy: Black, White, and Eskimo

According to the Guiness [Guinness] Book of Records, Eskimos Egingwah, Ootah, Ooqueahand Seegloo, along with African American Matthew Henson, became the first humans to stand on the North Pole. The date of their famous journey to where no one has gone before was April 6, 1909. However, they were denied the status of co-discoverer with Robert E. Perry, who came along about forty-five minutes later. Perry\u27s reward to Henson for reaching the Pole before him was to ignore Henson from that time. The names of the Eskimos were also dropped from history