Since the mid-1990s, Bombus occidentalis (Green) has declined from being one of the most common to one of the rarest bumble bee species in the Pacific Northwest of the United States. Although its conservation status is unresolved, a petition to list this species as endangered or threatened was recently submitted to the U.S. Fish and Wildlife Service. To shed light on the conservation situation ...

Urban waste management is becoming an increasingly complex task, absorbing a huge amount of resources, and having a major environmental impact. The design of a waste management system consists in various activities, and one of these is related to the location of waste collection sites. In this paper, we propose an integer programming model that helps decision makers in choosing the sites where ...

PROBLEM Voluntary counselling and testing (VCT) data from the registered sites in Kenya have been fraught with challenges, leading to insufficient statistics in the national office for planning purposes. An exercise was carried out to determine the barriers to the flow of data in VCT sites in Kenya. APPROACH A record-based survey was conducted at 332 VCT sites in Kenya. Data from on-site reco...

MOTIVATION One of the most common methodologies to identify cis-regulatory sites in regulatory regions in the DNA is that of weight matrices, as testified by several articles in this issue. An alternative to strengthen the computational predictions in regulatory regions is to develop methods that incorporate more biological properties present in such DNA regions. The grammatical implementation ...

The Hawaiian Islands represent one of the few ecosystems in the world that lacks native ants and thus represents a unique environment in which to study invasion biology. In the course of a study of behavioral interactions among invasive ant species, we collected the most abundant ants from four different field sites on the islands of Oahu and Hawaii. One year after the original collections, we ...

Introduction: Optimization of waste collection systems can reduce waste management costs. In this study, optimization of the waste collection system of district 3 of Yazd municipality of Iran has been investigated using underground containers. Materials and Methods: In this research, after collecting information and performing field inspections, the statistical and raster information obtained ...

The most famous and relevant innovative type of construction reorganization urban areas is renovation that defined in the directive documents Moscow Government as demolition dismantling buildings conditionally autonomous areas, by well-known Resolution legal explaining it, without taking into account degree physical or moral aging these structures with aim erecting multi-storey residential incr...

This paper models the effects of three different options for domestic waste collection using data from three Hampshire authorities: (i) joint working between neighbouring waste collection authorities; (ii) basing vehicles at waste disposal sites; and (iii) alternate weekly collection of residual waste and dry recyclables. A vehicle mileage savings of 3% was modelled for joint working, where exi...