scholarly journals Exploring Stable Population Concepts from the Perspective of Cohort Change Ratios

2013 ◽  
Vol 6 (1) ◽  
pp. 1-17 ◽  
Author(s):  
David A. Swanson
Keyword(s):  
Stable Population ◽  
Cohort Change

Haul-out behaviour and densities of ringed seals (Phoca hispida) in the Barrow Strait area, N.W.T.

1979 ◽  
Vol 57 (10) ◽  
pp. 1985-1997 ◽  
Author(s):  
Kerwin J. Finley
Keyword(s):  
Wind Speed ◽  
Early Morning ◽  
Maximum Density ◽  
Stable Population ◽  
The Sun ◽  
High Wind ◽  
Phoca Hispida ◽  
High Wind Speed ◽  
Ringed Seals ◽  
Calm Weather

Numbers of ringed seals hauled out on the ice began to increase in early June. Numbers on the ice were highest from 0900 to 1500 hours Central Standard Time and lowest (average 40–50% of peak) in early morning. Seals commonly remained on the ice for several hours, and occasionally (during calm weather) for > 48 h. Numbers on the ice were reduced on windy days and possibly also on unusually warm, bright and calm days. Seals tended to face away from the wind (particularly with high wind speed) and oriented broadside to the sun. Seals usually occurred singly (60–70% of all groups) at their holes.Numbers of seals hauled out at Freemans Cove remained relatively constant during June (maximum density 4.86/km2), whereas at Aston Bay numbers increased dramatically to a maximum density of 10.44/km2 in late June. The increase was thought to be due to an influx of seals abandoning unstable ice. The density of seal holes at Freemans Cove (5.92/km2) was much higher than at Aston Bay (2.73/km2). The ratio of holes to the maximum numbers of seals (1.12:1) at Freemans Cove represents a first estimate of this relationship in an apparently stable population.

scholarly journals Nicorandil associated anal ulcers: an estimate of incidence

2012 ◽  
Vol 94 (3) ◽  
pp. 170-172 ◽  
Author(s):  
HS Colvin ◽  
T Barakat ◽  
O Moussa ◽  
H Babu ◽  
T Slaughter ◽  
...  
Keyword(s):  
Community Pharmacy ◽  
Annual Incidence ◽  
Health District ◽  
Stable Population ◽  
Central Hospital ◽  
Electronic Search ◽  
Number Of Patients ◽  
The Mean ◽  
Eventual Healing ◽  
Anal Ulceration

INTRODUCTION Nicorandil is a commonly prescribed antianginal medication that has been found to be associated with painful anal ulceration. The incidence of this complication is unknown. We have used the best data available to us to make an estimate of this figure in a health district with a remarkably stable population of approximately 200,000 people. METHODS Using an electronic search of all letters generated from colorectal and gastroenterology clinics as well as endoscopy reports from January 2004 to November 2010, patients with anal ulceration who were taking nicorandil were identified. Other causes of ulceration were excluded by biopsy in the majority of cases. The central hospital and community pharmacy database was interrogated to estimate the number of patients who were prescribed nicorandil over a six-year period (2004-2010). RESULTS A total of 30 patients (24 men, 6 women) with a median age of 79.5 years were identified who fulfilled the criteria of: taking nicorandil; having no other identified cause for anal ulceration; and achieving eventual healing after withdrawal of nicorandil. In the six-year period an estimated mean of 1,379 patients were prescribed nicorandil each year. The mean annual incidence of anal ulcers among nicorandil users is therefore calculated to be in the region of 0.37%. CONCLUSIONS Anal ulceration appears to occur in approximately four in every thousand patients prescribed nicorandil each year. Prescribing physicians should explain the risk of this unpleasant complication to their patients.

scholarly journals The end of convergence in developmental patterns of frequent marijuana use from ages 18 to 30: An analysis of cohort change from 1976–2016

2018 ◽  
Vol 191 ◽  
pp. 203-209 ◽  
Author(s):  
Yvonne M. Terry-McElrath ◽  
Megan E. Patrick ◽  
Patrick M. O’Malley ◽  
Lloyd D. Johnston
Keyword(s):  
Marijuana Use ◽  
Developmental Patterns ◽  
Cohort Change

scholarly journals Population projections for all U.S. counties by age, sex, and race controlled to the Shared Socioeconomic Pathways

2018 ◽  
Author(s):  
Mathew Hauer
Keyword(s):  
Census Data ◽  
Age Groups ◽  
The United States ◽  
Population Projections ◽  
Leslie Matrix ◽  
Ex Post ◽  
Ex Post Facto ◽  
Using Data ◽  
And Control ◽  
Cohort Change

Small area and subnational population projections are important for understanding long-term demographic changes. I provide county-level population projections by age, sex, and race in five-year intervals for the period 2015-2100 for all U.S. counties. Using historic U.S. census data in temporally rectified county boundaries and race groups for the period 1990-2015, I calculate cohort-change ratios (CCRs) and cohort-change differences (CCDs) for eighteen five-year age groups (0-85+), two sex groups (Male and Female), and four race groups (White NH, Black NH, Other NH, Hispanic) for all U.S counties. I then project these CCRs/CCDs using ARIMA models as inputs into Leslie matrix population projection models and control the projections to the Shared Socioeconomic Pathways. I validate the methods using ex-post facto evaluations using data from 1969-2000 to project 2000-2015. My results are reasonably accurate for this period. These data have numerous potential uses and can serve as inputs for addressing questions involving sub-national demographic change in the United States.

scholarly journals Cutting Edge: Epigenetic Regulation of Foxp3 Defines a Stable Population of CD4+ Regulatory T Cells in Tumors from Mice and Humans

2014 ◽  
Vol 194 (3) ◽  
pp. 878-882 ◽  
Author(s):  
Jeremy D. Waight ◽  
Shinji Takai ◽  
Bo Marelli ◽  
Guozhong Qin ◽  
Kenneth W. Hance ◽  
...  
Keyword(s):  
T Cells ◽  
Regulatory T Cells ◽  
Epigenetic Regulation ◽  
Cutting Edge ◽  
Stable Population

EFFECT OF GLUTAMIC ACID ON MENTAL FUNCTION

PEDIATRICS ◽  
1950 ◽  
Vol 5 (4) ◽  
pp. 645-648
Author(s):  
WILLIAM J. KERR ◽  
S. A. SZUREK
Keyword(s):  
Glutamic Acid ◽  
Stable Population ◽  
Mental Function ◽  
Test Situation

These results do not substantiate previous reports that glutamic acid will increase measurable intelligence. Attitudinal effect on the part of nurses, psychologists and psychotherapists, which might influence the results, has been minimized by the use of careful controls and different psychologists in each test situation. Because of the small number of cases here reported, further studies are needed on larger groups using similar controls. A hospital with a large stable population of children with low testable intelligence would be preferable to the Langley Porter Clinic. One such study is soon to be reported. The results are in essential agreement with these.

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