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On Certain Functional Equation in Semiprime Rings

Algebra Colloquium 2016年第1期23卷 65-70页

作者： Nejc Sirovnik joso vukman Department of Mathematics and Computer Science FNM University of Maribor 2000 Maribor Slovenia FAMNIT University of Primorska Glagoljagka 8 6000 Koper Slovenia IMFM Jadranska 19 1000 Ljubljana Slovenia

Let n be a fixed integer, let R be an （n ＋ 1）!-torsion free semiprime ring with the identity element and let F ： R → R be an additive mapping satisfying the relation F（xn＋2） ∑＋n＋i=1xi-1F（x）2xn＋1-i -∑xnF（x）xn＋1-i for all x 6 R. In this case, we prove that F is of the form 2F（x） = D（x）＋ ax ＋ xa for all x ∈ R, where D ： R → R is a derivation and a 6 R is some fixed element.

关键词： ring prime ring semiprime ring derivation Jordan derivation Jordan triplederivation

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A Conceptual Approach for Cannibalism Between Goods

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Chinese Business Review 2012年第11期11卷 989-995页

作者： Mauro Maia Laruccia joso Americo Martelli Tristao Pontificia Universidade Catolica de Sao Paulo and Fundaao Armando Alvares Penteado Sao PauloBrazil Sandra Maria Correia Loureiro Instituto Universitario de Lisboa(ISCTE-IUL)LisboaPortugal

The launching of a new product is an essential strategy for the survival and success of a company. However, in certain cases, it can reduce the results obtained by other products of the same company. This fact is named ＂cannibalism＂. Following by a review of the literature on cannibalism between goods, this paper outlines a conceptual approach, showing the way it happens, its impacts, and the possibility of its uses as a marketing tool. A new product should, wherever possible, be carefully designed to avoid cannibalizing old products, unless this process is carefully planned. Concludes that creating and launching of new products are critical to companies who want to stand out next to their markets and need to survive over time. A lot of new products launched each year, coupled with the fact that most are line extensions already worked by companies, so we assume that the occurrence of cannibalism is common, or that a significant amount of resources are designed to prevent or dilute it. There is a high probability of transfer of results obtained by established products to new products, since similarity between

关键词： cannibalism new products marketing innovation

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Secondary male hypogonadism： a prevalent but overlooked comorbidity of obesity

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Asian Journal of Andrology 2018年第6期20卷 531-538页

作者： Maria Molina-Vega Araceli Mufioz-Garach Miguel Damas-Fuentes joso Carlos Fernfindez-Garcia Francisco J inahones Department of Endocrinology and Nutrition Virgen de la Victoria Universitary HospitalMalaga 29010Spain Institute of Biomedical Research in Malaga（IBIMA） Virgen de la Victoria Universitary HospitalMalaga 29010Spain CIBER Pathophysiology of Obesity and Nutrition（CB06/003） Institute of Health Carlos III（ISClII）Madrid 28029Spain.

Male hypogonadism associated with obesity is a very prevalent condition and is increasing in parallel with the epidemic prevalence of obesity. Low testosterone levels promote higher fat mass with reduced lean mass. Male hypogonadism is related to an increase in associated cardiometabolic complications, such as hypertension, type 2 diabetes mellitus, the metabolic syndrome, and cardiovascular disease. Its influence as a comorbidity of obesity is becoming more evident and should be evaluated and treated in at-risk patients. Mechanisms involved in this relationship include body composition changes, the presence of adipokines, insulin resistance, and other factors, some of which are still unknown. Weight loss and treatment to replace testosterone levels improve the metabolic profile and quality of life in patients with obesity and hypogonadism; these beneficial effects depend on treatment modality and duration of therapy. The use of testosterone replacement therapy may be indicated, as it has not been shown to increase cardiovascular risk, and retrospective studies suggest a reduction in events in men with metabolic syndrome and type 2 diabetes.

关键词： adipose tissue male hypogonadism obesity testosterone

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