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Cowen L, Mancini M, Lucas A, Martin A, Lavigne J, Donovan J. Utilization of corticosteroids in DuchenneConnect registry participants. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bertram D, Harfenist A, Cowen L, Koch D, Drever M, Hipfner J, Lemon M. Latitudinal temperature-dependent variation in timing of prey availability can impact Pacific seabird populations in Canada. CAN J ZOOL 2017. [DOI: 10.1139/cjz-2016-0197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We modelled how nestling growth rates of Cassin’s Auklet (Ptychoramphus aleuticus (Pallas, 1811)) varied with timing of peak copepod prey availability at two breeding colonies in British Columbia: on Triangle Island, in the California Current Ecosystem, and Frederick Island, in the Gulf of Alaska Ecosystem. We used time series of nestling growth rates and estimated the seasonal timing of peak biomass of the copepod Neocalanus cristatus (Krøyer, 1848) using a temperature-dependent phenology equation. We developed a single model to examine intercolony differences in the effect of the timing of regional peak prey biomass on seabird nestling growth rates. This model indicated nestling growth rates on Triangle Island varied widely and were positively associated with timing of peak zooplankton biomass, such that higher growth rates were observed when the peak biomass occurred later in the breeding season. In contrast, nestling growth rates were consistently high at Frederick Island, where peak copepod biomass always occurred relatively late. If ocean climate warming results in a poleward shift of Neocalanus abundance and induces earlier and more narrow timing of availability, then episodes of poor nestling growth will increase in frequency on Triangle Island and could eventually affect auklets on more northerly colonies.
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Affiliation(s)
- D.F. Bertram
- Environment and Climate Change Canada, Wildlife Research Division, c/o Institute of Ocean Sciences, 9860 West Saanich Road, P.O. Box 6000, Sidney, BC V8L 4B2, Canada
- Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - A. Harfenist
- Environment and Climate Change Canada, Canadian Wildlife Service, 5421 Robertson Road, Delta, BC V4K 3N2, Canada
| | - L.L.E. Cowen
- Department of Mathematics and Statistics, University of Victoria, P.O. Box 1700, Station CSC, Victoria, BC V8W 2Y2, Canada
| | - D. Koch
- Department of Mathematics and Statistics, University of Victoria, P.O. Box 1700, Station CSC, Victoria, BC V8W 2Y2, Canada
| | - M.C. Drever
- Environment and Climate Change Canada, Canadian Wildlife Service, 5421 Robertson Road, Delta, BC V4K 3N2, Canada
| | - J.M. Hipfner
- Environment and Climate Change Canada, Wildlife Research Division, 5421 Robertson Road, Delta, BC V4K 3N2, Canada
- Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - M.J.F. Lemon
- Environment and Climate Change Canada, Canadian Wildlife Service, 5421 Robertson Road, Delta, BC V4K 3N2, Canada
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Knepp T, Pippin M, Crawford J, Chen G, Szykman J, Long R, Cowen L, Cede A, Abuhassan N, Herman J, Delgado R, Compton J, Berkoff T, Fishman J, Martins D, Stauffer R, Thompson AM, Weinheimer A, Knapp D, Montzka D, Lenschow D, Neil D. Estimating surface NO 2 and SO 2 mixing ratios from fast-response total column observations and potential application to geostationary missions. J Atmos Chem 2015; 72:261-286. [PMID: 26692593 PMCID: PMC4665805 DOI: 10.1007/s10874-013-9257-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 04/08/2013] [Indexed: 05/20/2023]
Abstract
Total-column nitrogen dioxide (NO2) data collected by a ground-based sun-tracking spectrometer system (Pandora) and an photolytic-converter-based in-situ instrument collocated at NASA's Langley Research Center in Hampton, Virginia were analyzed to study the relationship between total-column and surface NO2 measurements. The measurements span more than a year and cover all seasons. Surface mixing ratios are estimated via application of a planetary boundary-layer (PBL) height correction factor. This PBL correction factor effectively corrects for boundary-layer variability throughout the day, and accounts for up to ≈75 % of the variability between the NO2 data sets. Previous studies have made monthly and seasonal comparisons of column/surface data, which has shown generally good agreement over these long average times. In the current analysis comparisons of column densities averaged over 90 s and 1 h are made. Applicability of this technique to sulfur dioxide (SO2) is briefly explored. The SO2 correlation is improved by excluding conditions where surface levels are considered background. The analysis is extended to data from the July 2011 DISCOVER-AQ mission over the greater Baltimore, MD area to examine the method's performance in more-polluted urban conditions where NO2 concentrations are typically much higher.
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Affiliation(s)
- T. Knepp
- Science Systems and Applications, Inc., Hampton, VA 23681 USA
- NASA Langley Research Center, Hampton, VA 23681 USA
| | - M. Pippin
- NASA Langley Research Center, Hampton, VA 23681 USA
| | - J. Crawford
- NASA Langley Research Center, Hampton, VA 23681 USA
| | - G. Chen
- NASA Langley Research Center, Hampton, VA 23681 USA
| | - J. Szykman
- US EPA, Research Triangle Park, Durham, NC 27701 USA
| | - R. Long
- US EPA, Research Triangle Park, Durham, NC 27701 USA
| | - L. Cowen
- NASA Langley Research Center, Hampton, VA 23681 USA
| | - A. Cede
- LuftBlick, Kreith, 6162 Austria
- NASA Goddard Space Flight Center, Greenbelt, MD 20771 USA
| | - N. Abuhassan
- NASA Goddard Space Flight Center, Greenbelt, MD 20771 USA
- School of Engineering, Morgan State University, Baltimore, MD 21251 USA
| | - J. Herman
- Joint Center for Earth Systems Technology, University of Baltimore County, Baltimore, MD 21250 USA
| | - R. Delgado
- Joint Center for Earth Systems Technology, University of Baltimore County, Baltimore, MD 21250 USA
| | - J. Compton
- Joint Center for Earth Systems Technology, University of Baltimore County, Baltimore, MD 21250 USA
| | - T. Berkoff
- Joint Center for Earth Systems Technology, University of Baltimore County, Baltimore, MD 21250 USA
| | - J. Fishman
- Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, MO 63103 USA
| | - D. Martins
- Department of Meteorology, Pennsylvania State University, University Park, PA 16802 USA
| | - R. Stauffer
- Department of Meteorology, Pennsylvania State University, University Park, PA 16802 USA
| | - A. M. Thompson
- Department of Meteorology, Pennsylvania State University, University Park, PA 16802 USA
| | - A. Weinheimer
- National Center for Atmospheric Research, Boulder, CO 80305 USA
| | - D. Knapp
- National Center for Atmospheric Research, Boulder, CO 80305 USA
| | - D. Montzka
- National Center for Atmospheric Research, Boulder, CO 80305 USA
| | - D. Lenschow
- National Center for Atmospheric Research, Boulder, CO 80305 USA
| | - D. Neil
- NASA Langley Research Center, Hampton, VA 23681 USA
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Bradley P, Cowen L, Menke M, King J, Berger B. BETAWRAP: successful prediction of parallel beta -helices from primary sequence reveals an association with many microbial pathogens. Proc Natl Acad Sci U S A 2001; 98:14819-24. [PMID: 11752429 PMCID: PMC64942 DOI: 10.1073/pnas.251267298] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2001] [Indexed: 11/18/2022] Open
Abstract
The amino acid sequence rules that specify beta-sheet structure in proteins remain obscure. A subclass of beta-sheet proteins, parallel beta-helices, represent a processive folding of the chain into an elongated topologically simpler fold than globular beta-sheets. In this paper, we present a computational approach that predicts the right-handed parallel beta-helix supersecondary structural motif in primary amino acid sequences by using beta-strand interactions learned from non-beta-helix structures. A program called BETAWRAP (http://theory.lcs.mit.edu/betawrap) implements this method and recognizes each of the seven known parallel beta-helix families, when trained on the known parallel beta-helices from outside that family. BETAWRAP identifies 2,448 sequences among 595,890 screened from the National Center for Biotechnology Information (NCBI; http://www.ncbi.nlm.nih.gov/) nonredundant protein database as likely parallel beta-helices. It identifies surprisingly many bacterial and fungal protein sequences that play a role in human infectious disease; these include toxins, virulence factors, adhesins, and surface proteins of Chlamydia, Helicobacteria, Bordetella, Leishmania, Borrelia, Rickettsia, Neisseria, and Bacillus anthracis. Also unexpected was the rarity of the parallel beta-helix fold and its predicted sequences among higher eukaryotes. The computational method introduced here can be called a three-dimensional dynamic profile method because it generates interstrand pairwise correlations from a processive sequence wrap. Such methods may be applicable to recognizing other beta structures for which strand topology and profiles of residue accessibility are well conserved.
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Affiliation(s)
- P Bradley
- Mathematics Department and Laboratory for Computer Science, and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Levison H, Garner D, MacMillan H, Cowen L. Living with cystic fibrosis: patient, family, and physician realities. Compr Ther 1987; 13:38-45. [PMID: 3315409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The challenge for patient, family, and healthcare professionals alike is to separate the disease's insidiousness from the potential the patient and family have to enjoy life within the patient's abbreviated life span. We must emphasize that most patients with CF and their families do make a successful psychological adjustment. Simultaneously, parents must fulfill the varied physical and psychological needs of the child. A young adult patient with CF summarizes the patient's task: "Projecting a life goal, living it, having the goal altered by luck and by fate, accomplishing that goal, and then reflecting on what has been done. That is life. That is a life compressed for us; CF is myopic. We cannot look through the long vista of life. That is disappointing, frustrating, and cursed at. We can live now. We can do the best we can. Set goals that fit on our playing field and accomplish them." An emotionally adjusted family makes the patient's task possible. Achieving the goal of adequate adjustment also depends on the physician's having the medical expertise to manage this complex multisystem illness and the ability to make the medical knowledge comprehensible for patient and family.
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Affiliation(s)
- H Levison
- Hospital for Sick Children, Toronto, Ontario, Canada
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Abstract
One hundred and twenty-six 6 to 11-year-old latency age children with Cystic Fibrosis regularly attending the CF clinic of the Hospital for Sick Children were asked to complete the Piers-Harris Self-Concept Scale and the Children's Health Locus of Control. Their parents were requested to complete the Child Behavior Checklist and the Family Assessment Measure. One hundred and eight (86%) participated in the study. Twenty-three percent of the children were found to have sufficient behavior problems to indicate a significant degree of maladjustment. Latency-age CF children show an increase in problems compared to a pre-school group, suggesting that leaving the protection of the family is problematic for a child with a chronic physical disorder. Males show more behavior problems than females. Males' behavior is characterized by somatic complaint profile. In spite of difficulties, CF latency children are able to maintain good social competence and self-concept suggesting compensatory mechanisms. These mechanisms are different for males and females. Females' self-concept and social competence are supportive of each other, whereas for males, this is not the case. Similarly, female behavior is relevant to family functioning. Males and females adjust to difficulty as indicated by differences in behavior profiles.
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Cowen L, Mok J, Corey M, MacMillan H, Simmons R, Levison H. Psychologic adjustment of the family with a member who has cystic fibrosis. Pediatrics 1986; 77:745-53. [PMID: 3703640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Seventy-eight percent of the 384 patients 2 years of age and older who were enrolled in the Cystic Fibrosis Clinic at the Hospital for Sick Children participated in this study of family adjustment to cystic fibrosis. Residence with at least one parent at the time of the survey was a condition for inclusion in the study. The effect of the disease on the family was assessed using three questionnaires: an inventory of family problems as perceived by the parents and two standardized measures of family interaction. Measures of behavior and self-concept in each patient and sibling, physical disease parameters for each patient, and demographic characteristics of the families were examined and analyzed in relation to the responses to the questionnaires on family interaction. Families of patients with cystic fibrosis were found to function very well, with normal mean scores on both standardized profiles. Children with cystic fibrosis showed more behavior problems than expected from the test norms, and healthy siblings of children with cystic fibrosis had behavior problem scores midway between those with the disease and norm scores. Measures of self-concept were remarkably similar for patients and siblings and showed levels at or above those for children and young adults in the general population. Parents psychosocial scores were influenced by the patients' physical parameters, but the severity of the disease generally was unrelated to psychosocial scores of patients and siblings. A notable exception was the correlation of emotional disturbance with amount of hospitalization in patients older than 12 years of age.
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Abstract
Eighty-five 12- to 15-year-old adolescents regularly attending the cystic fibrosis (CF) clinic of The Hospital for Sick Children were asked to complete the Children's Health Locus of Control and the Tennessee Self Concept Scale. Their parents were requested to complete the Child Behavior Checklist. Thirty-four males (72%) and 28 females (74%) participated in the study. This study found that adolescents with CF are able to maintain a good self concept, be socially competent, and perceive that they are in control of their health while showing an increase in behavior problems. Females rely heavily on denial and are more behaviorally compliant, whereas boys use less denial but show more behavior problems. Males appear to integrate having a physical disorder into their self concept, whereas females do not. The findings demonstrate a difference in mechanisms of coping with cystic fibrosis between male and female adolescents with CF, which may contribute to the decline in physical status in females and better survival of males.
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Cowen L, Corey M, Keenan N, Simmons R, Arndt E, Levison H. Family adaptation and psychosocial adjustment to cystic fibrosis in the preschool child. Soc Sci Med 1985; 20:553-60. [PMID: 4001981 DOI: 10.1016/0277-9536(85)90393-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The parents of 80% (41 of 51) of preschoolers with cystic fibrosis (CF) diagnosed at least 1 year prior to the study and attending the Hospital for Sick Children (HSC) CF Clinic completed the Problem Inventory (PINV), Preschool Behavior Questionnaire (PBQ) and Family Assessment Measure (FAM). The mean age of the CF children was 3.7 years. Parents of a control group of 31 healthy daycare children with a mean age of 3.6 years completed the same questionnaires. Parents of healthy preschoolers reported more child-related problems for 2-5 year olds than did parents of CF children (P less than 0.001) suggesting that parents who have confronted the CF diagnosis go on to minimize the normal stresses of the developmental period. Considerable agreement was seen between PINV scores for mothers and fathers in each group, revealing that parents in a given family perceive similarly the impact their child has upon them. The mean PBQ for CF preschoolers was not significantly different from that of the control group, although there was some tendency toward hostile aggressive behavior in the CF group. Surprisingly, total FAM scores of all samples showed no significant differences with the exception of a better total FAM score for fathers of CF children when compared to control fathers revealing that the CF family is not, during the early years of relative health stability, adversely affected. Two subscales were significantly elevated, social desirability (for CF mothers and fathers) and denial (for CF mothers only), describing an important response style which may enhance mastery of long-term stress.(ABSTRACT TRUNCATED AT 250 WORDS)
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Abstract
The 79 female and 147 male patients constituting the population with cystic fibrosis (CF) aged 16 years and older attending The Hospital for Sick Children were asked to complete the Cornell Medical Index (CMI) and Tennessee Self-Concept Scale (TSCS); 64 female (81%) and 112 male (76%) subjects participated. Analysis of CMI results showed 43% of female subjects to have moderate to severe emotional disturbance compared to 19% of male subjects. This female : male ratio for severity of emotional disturbance is found in ostensibly healthy groups, but the percentages of disturbance approach values for medical patient populations. The frequency of emotional disability is greater in those more than 20 than in those 16-19 years old. The TSCS results portray a generally normal self-concept except for scores of positive physical self and psychosis for patients aged 20 years and older; these scores approach psychiatric values, suggesting that some reality distortion facilitates emotional adjustment to adult life with CF. The TSCS and CMI results correlate significantly, indicating a connection between self-concept and emotional status. However, TSCS and CMI scores do not correlate with measures of disease severity except for correlations between lung function and physical self-concept in older male patients. These results suggest that psychologic functioning is independent of the degree of physical impairment in older patients with CF, with the long-surviving male patients more realistically appraising the limitations their disease imposes and utilizing denial and minimization to a lesser degree. Demographic data on the clinic population reveal that most patients aged 16 years and older cope with their intellectual, developmental, and socioeconomic tasks commensurate with normal age expectations.
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Ognyanov V, Cowen L. A day hospital program for patients in crisis. Hosp Community Psychiatry 1974; 25:209-10. [PMID: 4592386 DOI: 10.1176/ps.25.4.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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