Opsins: Evolution in waiting

Complete vertebrate genome sequencing has revealed a remarkable stability and uniformity in the protein-coding gene set, which at first glance might suggest that gene duplication events are relatively rare. This may be a red herring, or at least a red cichlid, as the Lake Malawi cichlid fishes show rapid and extensive duplication and diversification of their retinal cone photoreceptor opsin genes.

Reforming the social housing waiting game

The UK’s social housing stock is a precious resource that needs to be allocated as fairly and transparently as possible, says Ed Turner, who highlights inadequacies in the current approach and argues for two major changes to the way social housing is allocated and the support councils give those in housing needed.

Patients in waiting:A qualitative study of type 2 diabetes patients' perceptions of diagnosis

Objective. Our aim was to examine how diagnosis is perceived by a sample of newly diagnosed type 2 diabetes patients. Methods. A qualitative study was carried out in the Lothian region of Scotland using in-depth interviews of 40 newly diagnosed type 2 diabetes patients recruited from 16 general practices in four Local Health Care Co-operatives and three hospital clinics. Purposive selection ensured that the sample's demographic characteristics were broadly representative of newly diagnosed type 2 diabetes patients in Lothian/Scotland. Results. Clarity, timing and authority of the diagnosis delivery were highly salient for patients. Many patients perceived their GP as unwilling to deliver/confirm the diagnosis. Patients who were not referred to hospital were unclear why a referral had not taken place. Those referred perceived confirmation of diagnosis by the consultant as a central reason. Waiting for a hospital appointment could be problematic for patients. Most wanted the diagnosis confirmed before they felt confident making lifestyle changes. Input from health services during the period prior to the hospital visit was highly valued. Waiting was taken by some asymptomatic patients to indicate that they did not have the condition. Others used a lengthy period of waiting to confirm their view that they had a 'milder' or 'less serious' form of diabetes than other patients. Conclusions. Adequate input from practitioners is needed to ensure that diagnosis is fully exploited as a crucial period in which patients learn to adapt to their condition. Being explicit about the diagnosis at first contact may avoid the problem of patients feeling 'in limbo' or uncertain whether they have type 2 diabetes. Practitioners should convey to patients that post-diagnosis/initial care is a process, stages of this process should be clarified to avoid misunderstanding and services should be integrated during this interim period to best effect. © Oxford University Press 2004; all rights reserved.

Reduced waiting times using a fast switching dual-polarization DDQPSK receiver in a packet switched network

In this paper, we demonstrate a fast switching dual polarization DDQPSK packet switched receiver with very short waiting times. The system employs mth power DDQPSK decoding for high frequency offset tolerance, and Stokes parameter estimation for robust polarization demultiplexing.

Optimization of waiting time at toll plazas

Toll plazas have several toll payment types such as manual, automatic coin machines, electronic and mixed lanes. In places with high traffic flow, the presence of toll plaza causes a lot of traffic congestion; this creates a bottleneck for the traffic flow, unless the correct mix of payment types is in operation. The objective of this research is to determine the optimal lane configuration for the mix of the methods of payment so that the waiting time in the queue at the toll plaza is minimized. A queuing model representing the toll plaza system and a nonlinear integer program have been developed to determine the optimal mix. The numerical results show that the waiting time can be decreased at the toll plaza by changing the lane configuration. For the case study developed an improvement in the waiting time as high as 96.37 percent was noticed during the morning peak hour.

Waiting room at an abortion clinic

General note: Title and date provided by Bettye Lane.

Homeless woman waiting for bus to take her to women's shelter for the night

General note: Title and date provided by Bettye Lane.

Homeless women waiting for bus to take them to women's shelter

General note: Title and date provided by Bettye Lane.

Women waiting in line at Battery Park

Inscriptions: Verso: [stamped] Photograph by Freda Leinwand. [463 West Street, Studio 229G, New York, NY 10014].

We Are the Ones We Have Been Waiting for: Pan-African Consciousness Raising and Organizing in the United States and Venezuela

We Are the Ones We Have Been Waiting for: Pan-African Consciousness Raising and Organizing in the United States and Venezuela, draws on fifteen months of field research accompanying organizers, participating in protests, planning/strategy meetings, state-run programs, academic conferences and everyday life in these two countries. Through comparative examination of the processes by which African Diaspora youth become radically politicized, this work deconstructs tendencies to deify political s/heroes of eras past by historicizing their ascent to political acclaim and centering the narratives of present youth leading movements for Black/African liberation across the Diaspora. I employ Manuel Callahan’s description of “encuentros”, “the disruption of despotic democracy and related white middle-class hegemony through the reconstruction of the collective subject”; “dialogue, insurgent learning, and convivial research that allows for a collective analysis and vision to emerge while affirming local struggles” to theorize the moments of encounter, specifically, the moments (in which) Black/African youth find themselves becoming politically radicalized and by what. I examine the ways in which Black/African youth organizing differs when responding to their perpetual victimization by neoliberal, genocidal state-politics in the US, and a Venezuelan state that has charged itself with the responsibility of radically improving the quality of life of all its citizens. Through comparative analysis, I suggest the vertical structures of “representative democracy” dominating the U.S. political climate remain unyielding to critical analyses of social stratification based on race, gender, and class as articulated by Black youth. Conversely, I contend that present Venezuelan attempts to construct and fortify more horizontal structures of “popular democracy” under what Hugo Chavez termed 21st Century Socialism, have resulted in social fissures, allowing for a more dynamic and hopeful negation between Afro-Venezuelan youth and the state.

Waiting Time Screening in Diagnostic Medical Imaging - A Case-Based View

Due to the high standards expected from diagnostic medical imaging, the analysis of information regarding waiting lists via different information systems is of utmost importance. Such analysis, on the one hand, may improve the diagnostic quality and, on the other hand, may lead to the reduction of waiting times, with the concomitant increase of the quality of services and the reduction of the inherent financial costs. Hence, the purpose of this study is to assess the waiting time in the delivery of diagnostic medical imaging services, like computed tomography and magnetic resonance imaging. Thereby, this work is focused on the development of a decision support system to assess waiting times in diagnostic medical imaging with recourse to operational data of selected attributes extracted from distinct information systems. The computational framework is built on top of a Logic Programming Case-base Reasoning approach to Knowledge Representation and Reasoning that caters for the handling of in-complete, unknown, or even self-contradictory information.

A Case Based approach to assess Waiting Time Prediction at an Intensive Care Unity

Waiting time at an intensive care unity stands for a key feature in the assessment of healthcare quality. Nevertheless, its estimation is a difficult task, not only due to the different factors with intricate relations among them, but also with respect to the available data, which may be incomplete, self-contradictory or even unknown. However, its prediction not only improves the patients’ satisfaction but also enhance the quality of the healthcare being provided. To fulfill this goal, this work aims at the development of a decision support system that allows one to predict how long a patient should remain at an emergency unit, having into consideration all the remarks that were just stated above. It is built on top of a Logic Programming approach to knowledge representation and reasoning, complemented with a Case Base approach to computing.