24,291 research outputs found
Review of: What Do Unions Do? by Richard B. Freeman and James L. Medoff
No full textThis article reviews What Do Unions Do? by Richard B. Freeman and James L. Medoff
Richard B. Freeman et James L. Medoff. — What Do Unions Do?
No full textDomange Kathleen. Richard B. Freeman et James L. Medoff. — What Do Unions Do?. In: Revue Française d'Etudes Américaines, N°23, février 1985. Aspects du Sud aujourd'hui. p. 149
Nucleotide sequence of the murine leukaemia virus amphotropic strain 4070A integrase (IN) coding region and comparative structural analysis of the inferred polypeptide
No full textP. L. Ey, N. L. Freeman, B. Bela, P. Li, J. L. McInne
Nemopalpus immaculatus Freeman 1949
No full textNemopalpus immaculatus Freeman, 1949 Paratype: 1♂ (det Freeman), 3978, Nova Teutonia Brasil, 27°11’ B / 52° 23’ L., 17 Nov 1937, Fritz Plaumann coll., Paul Freeman leg., Slide mount, (NMSA).Published as part of Wagner, Rüdiger & Stuckenberg, Brian, 2016, Cladistic analysis of Subfamily Bruchomyiinae (Diptera: Psychodidae), pp. 151-174 in Zootaxa 4092 (2) on page 154, DOI: 10.11646/zootaxa.4092.2.1, http://zenodo.org/record/26083
Who Escapes? The Relation of Church-Going & Other Background Factors to the Socio-Economic Performance of Blk. Male Yths. from Inner-City Pvrty Tracts
No full textUsing data from the NBER survey of Inner City youth and the National longitudinal survey of young men this paper examines the effect of church-going and other aspects of the background of youth their allocation of time, socially deviant behavior, and labor force behavior. 1)Church-going is associated with substantial differences in the behavior of youths, and thus in their chances to 'escape' from innercity poverty. It affects allocation of time, school-going, work activity, and the frequency of socially deviant activity.2)The diverse background factors examined in this study have different effects on various outcomes. Their differential effects suggest true causal impacts, with for example, the proportion of a youth's family working having positive effects on his labor market activity but not on other activities. 3) In addition to church going, the background factors that most influence'who escapes' are whether other members of the family work and whether the family is on welfare.4)The allocation of time and activities by youth is significantly influenced by market opportunities (or perceptions thereof). Those youths who believe it is easy to find a job are more likely to engage in socially productive activities than others. Youths who see many opportunities to make money illegally are less likely to engage in socially productive activities than other youths.
Multivariable norm optimal iterative learning control with auxiliary optimization
No full textThe paper describes a substantial extension of Norm Optimal Iterative Learning Control (NOILC) that permits tracking of a class of finite dimensional reference signals whilst simultaneously converging to the solution of a constrained quadratic optimization problem. The theory is presented in a general functional analytical framework using operators between chosen real Hilbert spaces. This is applied to solve problems in continuous time where tracking is only required at selected intermediate points of the time interval but, simultaneously, the solution is required to minimize a specified quadratic objective function of the input signals and chosen auxiliary (state) variables. Applications to the discrete time case, including the case of multi-rate sampling, are also summarized. The algorithms are motivated by practical need and provide a methodology for reducing undesirable effects such as payload spillage, vibration tendencies and actuator wear whilst maintaining the desired tracking accuracy necessary for task completion. Solutions in terms of NOILC methodologies involving both feedforward and feedback components offer the possibilities of greater robustness than purely feedforward actions. Robustness of the feedforward implementation is discussed and the work is illustrated by experimental results from a robotic manipulator
Depolarization and decreased surface expression of K+ channels contribute to NSAID-inhibition of intestinal restitution
No full textNon-steroidal anti-inflammatory drugs (NSAIDs) contribute to gastrointestinal ulcer formation by inhibiting epithelial cell migration and mucosal restitution; however, the drug-affected signaling pathways are poorly defined. We investigated whether NSAID inhibition of intestinal epithelial migration is associated with depletion of intracellular polyamines, depolarization of membrane potential (Em) and altered surface expression of K+ channels. Epithelial cell migration in response to the wounding of confluent IEC-6 and IEC-Cdx2 monolayers was reduced by indomethacin (100μM), phenylbutazone (100μM) and NS-398 (100μM) but not by SC-560 (1μM). NSAID-inhibition of intestinal cell migration was not associated with depletion of intracellular polyamines. Treatment of IEC-6 and IEC-Cdx2 cells with indomethacin, phenylbutazone and NS-398 induced significant depolarization of Em, whereas treatment with SC-560 had no effect on Em. The Em of IEC-Cdx2 cells was: −38.5±1.8mV under control conditions; −35.9±1.6mV after treatment with SC-560; −18.8±1.2mV after treatment with indomethacin; and −23.7±1.4mV after treatment with NS-398. Whereas SC-560 had no significant effects on the total cellular expression of Kv1.4 channel protein, indomethacin and NS-398 decreased not only the total cellular expression of Kv1.4, but also the cell surface expression of both Kv1.4 and Kv1.6 channel subunits in IEC-Cdx2. Both Kv1.4 and Kv1.6 channel proteins were immunoprecipitated by Kv1.4 antibody from IEC-Cdx2 lysates, indicating that these subunits co-assemble to form heteromeric Kv channels. These results suggest that NSAID inhibition of epithelial cell migration is independent of polyamine-depletion, and is associated with depolarization of Em and decreased surface expression of heteromeric Kv1 channels.ID: S0006295207001931; M3: Article; Accession Number: S0006295207001931; Author: L.C. Freeman (b); Author: D.F. Narvaez (a); Author: A. McCoy (a); Author: F.B. von Stein (c); Author: S. Young (b); Author: K. Silver (a); Author: S. Ganta (b); Author: D. Koch (b); Author: R. Hunter (b); Author: R.F. Gilmour (c); Author: J.D. Lillich (a, ⁎); Affiliation: Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, United States; Keyword: Non-steroidal anti-inflammatory drugs; Keyword: Intestinal epithelial cells; Keyword: Membrane potential; Keyword: Potassium channels; Number of Pages: 12; Language: English;Source type: Electronic(1)http://search.ebscohost.com/login.aspx?direct=true&db=edselp&AN=S0006295207001931&site=eds-live&scope=sit
Adapting the system to users based on implicit data: Ethical risks and possible solutions
No full textSymbiotic systems are systems that gather personal data implicitly provided by the user, derive a profile/model of the user from such data and adjust their output/service according to their notion of what would be desirable to the user thus modeled. Because of these three characteristics, symbiotic systems represent a step forward towards facilitated, simplified, user-friendly digital devices, or do they? Here we propose three cases describing realistic applications of symbiotic systems that potentially encapsulate some serious risk to their users. Experts of five different domains (i.e., ethics, security, law, human-computer interaction and psychology) dissect each case to identify the risks to the users and derive some possible minimization strategies. This panel aims at contributing to a beneficial development of symbiotic systems as it can be achieved by increasing users’ discernment and awareness of their consequences for society and everyday life
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