University of Massachusetts Amherst

About: University of Massachusetts Amherst is a education organization based out in Amherst Center, Massachusetts, United States. It is known for research contribution in the topics: Population & Galaxy. The organization has 37274 authors who have published 83965 publications receiving 3834996 citations. The organization is also known as: UMass Amherst & Massachusetts State College.

Dynamic conditional random fields: factorized probabilistic models for labeling and segmenting sequence data

Abstract: In sequence modeling, we often wish to represent complex interaction between labels, such as when performing multiple, cascaded labeling tasks on the same sequence, or when long-range dependencies exist. We present dynamic conditional random fields (DCRFs), a generalization of linear-chain conditional random fields (CRFs) in which each time slice contains a set of state variables and edges---a distributed state representation as in dynamic Bayesian networks (DBNs)---and parameters are tied across slices. Since exact inference can be intractable in such models, we perform approximate inference using several schedules for belief propagation, including tree-based reparameterization (TRP). On a natural-language chunking task, we show that a DCRF performs better than a series of linear-chain CRFs, achieving comparable performance using only half the training data.

Calcium: A Central Regulator of Plant Growth and Development

Abstract: Today no one questions the assertion that Ca2+ is a crucial regulator of growth and development in plants. The myriad processes in which this ion participates is large and growing and involves nearly all aspects of plant development (recent reviews in [Harper et al., 2004][1]; [Hetherington and

On derived domains in sentence phonology

Abstract: This paper deals with two distinct but inextricably connected sets of questions in the area of sentence phonology. The first concerns the organisation of sentence phonology and the nature of the phonological representation(s) of the sentence, and the second the relation between syntactic structure and phonological representation.

Diverse Applications of Nanomedicine

Abstract: The design and use of materials in the nanoscale size range for addressing medical and health-related issues continues to receive increasing interest. Research in nanomedicine spans a multitude of areas, including drug delivery, vaccine development, antibacterial, diagnosis and imaging tools, wearable devices, implants, high-throughput screening platforms, etc. using biological, nonbiological, biomimetic, or hybrid materials. Many of these developments are starting to be translated into viable clinical products. Here, we provide an overview of recent developments in nanomedicine and highlight the current challenges and upcoming opportunities for the field and translation to the clinic.

Corporate environmentalism : antecedents and influence of industry type

Abstract: How does a business firm manage its relationship with the natural environment? What are the factors that influence the choice of such strategies? Does industry type matter? The authors introduce and operationalize the concept of corporate environmentalism in an effort to answer these questions. Using stakeholder theory, the authors identify four important antecedents to corporate environmentalism, namely, public concern, regulatory forces, competitive advantage, and top management commitment. The authors then use a political-economic framework to develop testable hypotheses. To test the hypotheses, the authors perform multigroup path analysis on data gathered from more than 240 firms. They find that corporate environmentalism is related to all hypothesized antecedents and that industry type moderates several of those relationships. In the high environmental impact sector, public concern has the greatest impact on corporate environmentalism, followed by regulatory forces. In the moderate environme...