University of New Hampshire

About: University of New Hampshire is a education organization based out in Durham, New Hampshire, United States. It is known for research contribution in the topics: Population & Solar wind. The organization has 9379 authors who have published 24025 publications receiving 1020112 citations. The organization is also known as: UNH.

Real-time tool wear monitoring in milling using a cutting condition independent method

Abstract: This paper describes a new method to monitor end milling tool wear in real-time by tracking force model coefficients during the cutting process. The behavior of these coefficients are shown to be independent from the cutting conditions and correlated with the wear state of the cutting tool. The tangential and radial force model coefficients are normalized and combined into a single parameter for wear monitoring. A number of experiments with different workpiece materials are run to investigate the feasibility of tool wear monitoring using this method. We show that this method can be used in real-time to track tool wear and detect the transition point from the gradual wear region to the failure region in which the rate of wear accelerates.

Edge-mediated skyrmion chain and its collective dynamics in a confined geometry

Abstract: The emergence of a topologically nontrivial vortex-like magnetic structure, the magnetic skyrmion, has launched new concepts for memory devices. Extensive studies have theoretically demonstrated the ability to encode information bits by using a chain of skyrmions in one-dimensional nanostripes. Here, we report experimental observation of the skyrmion chain in FeGe nanostripes by using high-resolution Lorentz transmission electron microscopy. Under an applied magnetic field, we observe that the helical ground states with distorted edge spins evolve into individual skyrmions, which assemble in the form of a chain at low field and move collectively into the interior of the nanostripes at elevated fields. Such a skyrmion chain survives even when the width of the nanostripe is much larger than the size of single skyrmion. This discovery demonstrates a way of skyrmion formation through the edge effect, and might, in the long term, shed light on potential applications.

The Myth of Linguistic Homogeneity in U.S. College Composition.

Abstract: In "English Only and U.S. College Composition," Bruce Horner and John Trimbur identify the tacit policy of unidirectional English monolingualism, which makes moving students toward the dominant variety of English the only conceivable way of dealing with language issues in composition instruc tion. This policy of unidirectional monolingualism is an important concept to cri tique because it accounts for the relative lack of attention to multilingualism in com position scholarship. Yet it does not seem to explain why second-language issues have not become a central concern in composition studies. After all, if U.S. compo sition had accepted the policy of unidirectional monolingualism, all composition teachers would have been expected to learn how to teach the dominant variety of English to students who come from different language backgrounds. This has not been the case. While Geneva Smitherman and Victor Villanueva argue that coursework on language issues (though certainly not a monolingualist approach) should be part of every English teacher's professional preparation (4), relatively few graduate programs in composition studies offer courses on those issues, and even fewer require such courses. As a result, the vast majority of U.S. college composition programs remain unprepared for second-language writers who enroll in the main stream composition courses. To account for this situation, I want to take Horner and Trimbur's argument a step further and suggest that the dominant discourse of U.S. college composition not only has accepted English Only as an ideal but it al ready assumes the state of English-only, in which students are native English speak ers by default.

Disease alters macroecological patterns of North American bats

Abstract: Aim We investigated the effects of disease on the local abundances and distributions of species at continental scales by examining the impacts of white-nose syndrome, an infectious disease of hibernating bats, which has recently emerged in