458 research outputs found
Data analysis on the level of exposure to pollutions inindustrial zone: Acasestudy of Ewekoro and Ota Township
This studyfocusedonacomparativeanalysisofexposuretopol-
lution inOtaandEwekoroTownshipwherewehaveconcentration
of industriesthatemitspollutanttotheair.Thiswaswithaviewto
proffer solutiontothenegativeeffectsofindustrialactivitieson
residents withinindustriallocation.Thestudyinvolvedempirical
observationandinterviewofresidents.About652questionnaires
wereadministeredrandomlyontheresidents.Analysisinvolved
descriptivestatisticaltoolsincludingchi-squaretechniques.The
results suggestthatairpollutionwasmostfrequentlyreportedin
EwekoroandOtaandthiscanhelpinthepredictionofstringent
factor inwhichindustrialactivitiescouldposetosociet
Pharmacokinetic study of gemcitabine, given as prolonged infusion at fixed dose rate, in combination with cisplatin in patients with advanced non-small-cell lung cancer.
International audienc
Greenland records of aerosol source and atmospheric lifetime changes from the Eemian to the Holocene
The Northern Hemisphere experienced dramatic changes during the last glacial, featuring vast ice sheets and abrupt climate events, while high northern latitudes during the last interglacial (Eemian) were warmer than today. Here we use high-resolution aerosol records from the Greenland NEEM ice core to reconstruct the environmental alterations in aerosol source regions accompanying these changes. Separating source and transport effects, we find strongly reduced terrestrial biogenic emissions during glacial times reflecting net loss of vegetated area in North America. Rapid climate changes during the glacial have little effect on terrestrial biogenic aerosol emissions. A strong increase in terrestrial dust emissions during the coldest intervals indicates higher aridity and dust storm activity in East Asian deserts. Glacial sea salt aerosol emissions in the North Atlantic region increase only moderately (50%), likely due to sea ice expansion. Lower aerosol concentrations in Eemian ice compared to the Holocene are mainly due to shortened atmospheric residence time, while emissions changed little.It is supported by funding agencies and institutions in Belgium
(FNRS-CFB and FWO), Canada (NRCan/GSC), China (CAS), Denmark (FIST), France
(IPEV, CNRS/INSU, CEA and ANR), Germany (AWI), Iceland (RannIs), Japan (NIPR),
Korea (KOPRI), The Netherlands (NWO/ALW), Sweden (VR), Switzerland (SNF),
United Kingdom (NERC), and the USA (US NSF, Office of Polar Programs). Long-term
support of ice core research at the University of Bern by SNF is gratefully acknowledged
Perspectives on environmental CO2 emission and energy factor in Cement Industry
The global challenges of pollution emission in cement industry in relation to energy
consumption factor are overwhelming. No doubt it has been established that economic
development has an impact on the environmental pollution and ecological system. With major
constituent of environmental affluence been CO2, the consideration has to be on the type of
manufacturing process, the consumption mix and the additive ratio. This paper focuses on the
cement industry and aims to provide a systematic review of the specific operations, its trend
and its impact on environmental pollution in terms of energy consumption and emissions
evolved
A Mini Review on the Impact of Sewage Disposal on Environment and Ecosystem
Human activities contribute immensely to the production of wastewater which
emanates from residences, industries and agricultural practices that pollutes the environment
and water bodies. Up to 80-90% of the wastewater produced in developing countries is
disposed of into surface and groundwater which is a major cause of environmental pollution
that threatens human health. According to UN report, over 80% of the wastewater produced in
the world and over 95% in some least developed countries is released without being treated
into the environment. This paper reviews the methods of sewage disposal, the impact on the
environment, aquatic contaminant and the human health. Emphasis is placed on the impact of
disposal of various contaminants in aquifers and water bodies which could make water unsafe
for drinking and to perform other domestic and recreational activitie
Few smooth d-polytopes with n lattice points
We prove that, for fixed n there exist only finitely many embeddings of
Q-factorial toric varieties X into P^n that are induced by a complete linear
system. The proof is based on a combinatorial result that for fixed nonnegative
integers d and n, there are only finitely many smooth d-polytopes with n
lattice points. We also enumerate all smooth 3-polytopes with at most 12
lattice points. In fact, it is sufficient to bound the singularities and the
number of lattice points on edges to prove finiteness.Comment: 20+2 pages; major revision: new author, new structure, new result
Hospital-onset clostridium difficile infection rates in persons with cancer or Hematopoietic stem cell transplant: A C3IC network report
A multicenter survey of 11 cancer centers was performed to determine the rate of hospital-onset Clostridium difficile infection (HO-CDI) and surveillance practices. Pooled rates of HO-CDI in patients with cancer were twice the rates reported for all US patients (15.8 vs 7.4 per 10,000 patient-days). Rates were elevated regardless of diagnostic test used
Performance of the CMS Cathode Strip Chambers with Cosmic Rays
The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device
in the CMS endcaps. Their performance has been evaluated using data taken
during a cosmic ray run in fall 2008. Measured noise levels are low, with the
number of noisy channels well below 1%. Coordinate resolution was measured for
all types of chambers, and fall in the range 47 microns to 243 microns. The
efficiencies for local charged track triggers, for hit and for segments
reconstruction were measured, and are above 99%. The timing resolution per
layer is approximately 5 ns
Performance and Operation of the CMS Electromagnetic Calorimeter
The operation and general performance of the CMS electromagnetic calorimeter
using cosmic-ray muons are described. These muons were recorded after the
closure of the CMS detector in late 2008. The calorimeter is made of lead
tungstate crystals and the overall status of the 75848 channels corresponding
to the barrel and endcap detectors is reported. The stability of crucial
operational parameters, such as high voltage, temperature and electronic noise,
is summarised and the performance of the light monitoring system is presented
Influence of Body Position on Cortical Pain-Related Somatosensory Processing: An ERP Study
Background: Despite the consistent information available on the physiological changes induced by head down bed rest, a condition which simulates space microgravity, our knowledge on the possible perceptual-cortical alterations is still poor. The present study investigated the effects of 2-h head-down bed rest on subjective and cortical responses elicited by electrical, pain-related somatosensory stimulation. Methodology/Principal Findings: Twenty male subjects were randomly assigned to two groups, head-down bed rest (BR) or sitting control condition. Starting from individual electrical thresholds, Somatosensory Evoked Potentials were elicited by electrical stimuli administered randomly to the left wrist and divided into four conditions: control painless condition, electrical pain threshold, 30 % above pain threshold, 30 % below pain threshold. Subjective pain ratings collected during the EEG session showed significantly reduced pain perception in BR compared to Control group. Statistical analysis on four electrode clusters and sLORETA source analysis revealed, in sitting controls, a P1 component (40â50 ms) in the right somatosensory cortex, whereas it was bilateral and differently located in BR group. Controls â N1 (80â90 ms) had widespread right hemisphere activation, involving also anterior cingulate, whereas BR group showed primary somatosensory cortex activation. The P2 (190â220 ms) was larger in left-central locations of Controls compared with BR group. Conclusions/Significance: Head-down bed rest was associated to an overall decrease of pain sensitivity and an altered pai
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