Pomona College

About: Pomona College is a education organization based out in Claremont, California, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 2886 authors who have published 4525 publications receiving 138224 citations. The organization is also known as: Pomona.

Electromechanical Resonators from Graphene Sheets

Abstract: Nanoelectromechanical systems were fabricated from single- and multilayer graphene sheets by mechanically exfoliating thin sheets from graphite over trenches in silicon oxide. Vibrations with fundamental resonant frequencies in the megahertz range are actuated either optically or electrically and detected optically by interferometry. We demonstrate room-temperature charge sensitivities down to 8 × 10 –4 electrons per root hertz. The thinnest resonator consists of a single suspended layer of atoms and represents the ultimate limit of two-dimensional nanoelectromechanical systems.

Differential-Difference Equations

Abstract: Publisher Summary A systematic development of the theory of differential–difference equations was not begun until E. Schimdt published an important paper about fifty years ago. The subsequent gradual growth of the field has been replaced, in the last decade or so, by a rapid expansion due to the stimulus of various applications. This chapter introduces the study of differential–difference equations and discusses some of the main features of the theory. The role of differential–difference equations is vital in some areas, such as engineering problem and fluid mechanics. In engineering problem, the problem of controlling the temperature in a reaction tank is addressed using differential difference equations. The temperature variation is reported because of random disturbances, inherent effects due to u being non-zero, and the operation of the control device. The chapter discusses the asymptotic behavior of solutions and the problem of stability.

Clinical Practice Guideline Otitis Media with Effusion (Update)

Abstract: ObjectiveThis update of a 2004 guideline codeveloped by the American Academy of Otolaryngology—Head and Neck Surgery Foundation, the American Academy of Pediatrics, and the American Academy of Family Physicians, provides evidence-based recommendations to manage otitis media with effusion (OME), defined as the presence of fluid in the middle ear without signs or symptoms of acute ear infection. Changes from the prior guideline include consumer advocates added to the update group, evidence from 4 new clinical practice guidelines, 20 new systematic reviews, and 49 randomized control trials, enhanced emphasis on patient education and shared decision making, a new algorithm to clarify action statement relationships, and new and expanded recommendations for the diagnosis and management of OME.PurposeThe purpose of this multidisciplinary guideline is to identify quality improvement opportunities in managing OME and to create explicit and actionable recommendations to implement these opportunities in clinical pra...

Crafting Selves: Power, Gender, and Discourses of Identity in a Japanese Workplace

Abstract: "The ethnography of Japan is currently being reshaped by a new generation of Japanologists, and the present work certainly deserves a place in this body of literature. . . . The combination of utility with beauty makes Kondo's book required reading, for those with an interest not only in Japan but also in reflexive anthropology, women's studies, field methods, the anthropology of work, social psychology, Asian Americans, and even modern literature."--Paul H. Noguchi, "American Anthropologist" "Kondo's work is significant because she goes beyond disharmony, insisting on complexity. Kondo shows that inequalities are not simply oppressive-they are meaningful ways to establish identities."--Nancy Rosenberger, "Journal of Asian Studies"

Mechanical properties of suspended graphene sheets

Abstract: Using an atomic force microscope, we measured effective spring constants of stacks of graphene sheets (less than 5) suspended over photolithographically defined trenches in silicon dioxide. Measurements were made on layered graphene sheets of thicknesses between 2 and 8nm, with measured spring constants scaling as expected with the dimensions of the suspended section, ranging from 1to5N∕m. When our data are fitted to a model for doubly clamped beams under tension, we extract a Young’s modulus of 0.5TPa, compared to 1TPa for bulk graphite along the basal plane, and tensions on the order of 10−7N.