2,662 research outputs found
Capabilities and Governance the Rebirth of Production in the Theory of Economic Organization
We argue that since Coase’s seminal 1937 paper on “The Nature of the Firm,” there has been an odd and unjustified separation between price theory and the economics of organization. For example, matters of production has been the domain of the former exclusively. However, a new approach to economic organization, here called “the capabilities approach,” that places production center-stage in the explanation of economic organization, is now emerging. We discuss the sources of this approach and its relation to the mainstream economics of organization.Capability, Theory of the Firm, Price Theory
Langevin approach to synchronization of hyperchaotic time-delay dynamics
In this paper, we characterize the synchronization phenomenon of hyperchaotic
scalar non-linear delay dynamics in a fully-developed chaos regime. Our results
rely on the observation that, in that regime, the stationary statistical
properties of a class of hyperchaotic attractors can be reproduced with a
linear Langevin equation, defined by replacing the non-linear delay force by a
delta-correlated noise. Therefore, the synchronization phenomenon can be
analytically characterized by a set of coupled Langevin equations. We apply
this formalism to study anticipated synchronization dynamics subject to
external noise fluctuations as well as for characterizing the effects of
parameter mismatch in a hyperchaotic communication scheme. The same procedure
is applied to second order differential delay equations associated to
synchronization in electro-optical devices. In all cases, the departure with
respect to perfect synchronization is measured through a similarity function.
Numerical simulations in discrete maps associated to the hyperchaotic dynamics
support the formalism.Comment: 12 pages, 6 figure
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The Relational Antecedents of Interpersonal Helping: ‘Quantity’, ‘Quality’ or Both?
Having a large network of colleagues means having several opportunities to help those colleagues, as well as a higher chance of receiving requests for help from them. Employees with large networks are therefore expected to help more in the workplace than those with small networks. However, large networks are also associated with cognitive costs, which may reduce the focal employee's ability to both recognize the need for help and engage in helping behaviours. For these reasons, the authors assert an inverted U-shaped relation between the size of an ego's social network and engagement in helping behaviour. However, high-quality relationships imply higher mutual understanding between the actors, and hence lower cognitive costs. In turn, the position (and threshold) of the curve between network size and interpersonal helping should be influenced by the quality of the relationship between the provider and the beneficiaries of help. Analysis of employee-level, single-firm data supports these ideas, providing preliminary evidence that quality of relationship compensates for the difficulties that may arise from having large social networks
Time-dependent fields and anisotropy dominated magnetic media
We use a single dipole approximation to analyze the behavior of
anisotropy-dominated magnetic nanoparticles subjected to an external r.f.
field. We identify the steady state oscillations and analyze their stability.
We also analyze the case when the external r.f. field has a time-dependent
frequency which insures the most effective switching of the magnetization
Dermatoses em pacientes com diabetes mellitus
OBJECTIVE: It is yet unknown the relationship between diabetes and determinants or triggering factors of skin lesions in diabetic patients. The purpose of the present study was to investigate the presence of unreported skin lesions in diabetic patients and their relationship with metabolic control of diabetes. METHODS: A total of 403 diabetic patients, 31% type 1 and 69% type 2, underwent dermatological examination in an outpatient clinic of a university hospital. The endocrine-metabolic evaluation was carried out by an endocrinologist followed by the dermatological evaluation by a dermatologist. The metabolic control of 136 patients was evaluated using glycated hemoglobin. RESULTS: High number of dermophytosis (82.6%) followed by different types of skin lesions such as acne and actinic degeneration (66.7%), pyoderma (5%), cutaneous tumors (3%) and necrobiosis lipoidic (1%) were found. Among the most common skin lesions in diabetic patients, confirmed by histopathology, there were seen necrobiosis lipoidic (2 cases, 0.4%), diabetic dermopathy (5 cases, 1.2%) and foot ulcerations (3 cases, 0.7%). Glycated hemoglobin was 7.2% in both type 1 and 2 patients with adequate metabolic control and 11.9% and 12.7% in type 1 and 2 diabetic patients, respectively, with inadequate metabolic controls. A higher prevalence of dermatophytoses was seen in the both groups with inadequate metabolic control. CONCLUSIONS: The results showed a high prevalence of skin lesions in diabetic patients, especially dermatophytoses. Thus, poor metabolic control of diabetes increases patient's susceptibility to skin infections.OBJETIVO: Ainda é desconhecida a relação do diabetes com fatores determinantes ou precipitantes de lesões dermatológicas em pacientes diabéticos. Assim, o objetivo do estudo foi investigar a presença de lesões cutâneas, não referidas pelo paciente diabético e sua relação com o controle metabólico da doença. MÉTODOS: Foram examinados 403 pacientes, dos quais 31% eram diabéticos do tipo 1 e 69% do tipo 2. Em ambulatório de um hospital universitário, os pacientes foram atendidos por endocrinologista para a avaliação endócrino-metabólica e por dermatologista para a avaliação dermatológica. O grau de controle metabólico foi documentado em 136 pacientes por meio da dosagem de hemoglobina glicada. RESULTADOS: Houve predomínio de dermatofitoses (82,6%), seguido de grupo de dermatoses como acne e degeneração actínica (66,7%), piodermites (5%), tumores cutâneos (3%) e necrobiose lipoídica (1%). Entre as dermatoses mais comuns em diabéticos, foram confirmados com exame histológico: dois diagnósticos de necrobiose (0,4%), cinco de dermopatia diabética (1,2%) e três casos de mal perfurante plantar (0,7%). Os valores da hemoglobina glicada foram: 7,2% em pacientes com controle metabólico adequado nos dois tipos de diabetes e de 11,9% e 12,7% nos tipos 1 e 2, respectivamente, com controle inadequado. Nos pacientes com controle metabólico inadequado foi observada freqüência maior de dermatofitoses, em ambos os tipos de diabetes. CONCLUSÕES: Os dados revelaram freqüência elevada de lesão dermatológica nos pacientes diabéticos, especialmente dermatofitoses. Dessa forma, o descontrole metabólico do diabético propicia maior suscetibilidade a infecções cutâneas
The economy doesn’t need a reset, and neither does management theory
Policymakers, commentators, and academics have called for a Great Reset, a deep-seated overhaul of the organization of the global economy. Some suggest that management theory needs a reset of its own. We argue that Great Reset proponents fail to appreciate the power of markets to bring about desirable social outcomes and are overly sanguine about what governments can do to alleviate alleged market failures. These views also drive the increasing enthusiasm for stakeholder governance, an increased government role in innovation, and the call for new metrics for assessing outcomes, all part of the Great Reset narrative. And yet, concentrating more decision power in the hands of governments, implementing diffuse metrics, and diluting effective ownership can hamper the functioning of markets, encourage crony capitalism, and reduce the resources that are available for dealing with grand challenges. Existing management theory provides powerful tools for understanding the benefits and costs of alternative institutional arrangements; abandoning these tools will push management theory to the sideline in policy debates
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