On solving trust-region and other regularised subproblems in optimization

The solution of trust-region and regularisation subproblems which arise in unconstrained optimization is considered. Building on the pioneering work of Gay, Mor´e and Sorensen, methods which obtain the solution of a sequence of parametrized linear systems by factorization are used. Enhancements using high-order polynomial approximation and inverse iteration ensure that the resulting method is both globally and asymptotically at least superlinearly convergent in all cases, including in the notorious hard case. Numerical experiments validate the effectiveness of our approach. The resulting software is available as packages TRS and RQS as part of the GALAHAD optimization library, and is especially designed for large-scale problems

Essence in the philosophy of George Santayana.

Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1954 .D6. Source: Masters Abstracts International, Volume: 40-07, page: . Thesis (M.A.)--University of Windsor (Canada), 1954

The 1998 Earthquake Sequence South of Long Valley Caldera, California: Hints of Magmatic Involvement

A significant episode of seismic and geodetic unrest took place at Long Valley Caldera, California, beginning in the summer of 1997. Activity through late May of 1998 was concentrated in and around the south moat and the south margin of the resurgent dome. The Sierran Nevada block (SNB) region to the south/southeast remained relatively quiet until a M 5.1 event occurred there on 9 June 1998 (UT). A second M 5.1 event followed on 15 July (UT); both events were followed by appreciable aftershock sequences. An additional, distinct burst of activity began on 1 August 1998. The number of events in the August sequence (over the first week or two) was similar to the aftershock sequence of the 15 July 1998 M 5.1 event, but the later sequence was not associated with any events larger than M 4.3. All of the summer 1998 SNB activity was considered tectonic rather than magmatic; in general the SNB is considered an unlikely location for future eruptions. However, the August sequence—an “aftershock sequence without a mainshock”—is suggestive of a strain event larger than the cumulative seismotectonic strain release. Moreover, a careful examination of waveforms from the August sequence reveals a small handful of events whose spectral signature is strikingly harmonic. We investigate the waveforms of these events using spectral, autocorrelation, and empirical Green's function techniques and conclude that they were most likely associated with a fluid-controlled source. Our observations suggest that there may have been some degree of magma or magma-derived fluid involvement in the 1998 SNB sequence

Semantically Guided Depth Upsampling

We present a novel method for accurate and efficient up- sampling of sparse depth data, guided by high-resolution imagery. Our approach goes beyond the use of intensity cues only and additionally exploits object boundary cues through structured edge detection and semantic scene labeling for guidance. Both cues are combined within a geodesic distance measure that allows for boundary-preserving depth in- terpolation while utilizing local context. We model the observed scene structure by locally planar elements and formulate the upsampling task as a global energy minimization problem. Our method determines glob- ally consistent solutions and preserves fine details and sharp depth bound- aries. In our experiments on several public datasets at different levels of application, we demonstrate superior performance of our approach over the state-of-the-art, even for very sparse measurements.Comment: German Conference on Pattern Recognition 2016 (Oral

Functional identification of an aggression locus in the mouse hypothalamus

Electrical stimulation of certain hypothalamic regions in cats and rodents can elicit attack behaviour, but the exact location of relevant cells within these regions, their requirement for naturally occurring aggression and their relationship to mating circuits have not been clear. Genetic methods for neural circuit manipulation in mice provide a potentially powerful approach to this problem, but brain-stimulation-evoked aggression has never been demonstrated in this species. Here we show that optogenetic, but not electrical, stimulation of neurons in the ventromedial hypothalamus, ventrolateral subdivision (VMHvl) causes male mice to attack both females and inanimate objects, as well as males. Pharmacogenetic silencing of VMHvl reversibly inhibits inter-male aggression. Immediate early gene analysis and single unit recordings from VMHvl during social interactions reveal overlapping but distinct neuronal subpopulations involved in fighting and mating. Neurons activated during attack are inhibited during mating, suggesting a potential neural substrate for competition between these opponent social behaviours

Partially obscured human detection based on component detectors using multiple feature descriptors

This paper presents a human detection system based on component detector using multiple feature descriptors. The contribution presents two issues for dealing with the problem of partially obscured human. First, it presents the extension of feature descriptors using multiple scales based Histograms of Oriented Gradients (HOG) and parallelogram based Haar-like feature (PHF) for improving the accuracy of the system. By using multiple scales based HOG, an extensive feature space allows obtaining high-discriminated features. Otherwise, the PHF is adaptive limb shapes of human in fast computing feature. Second, learning system using boosting classifications based approach is used for training and detecting the partially obscured human. The advantage of boosting is constructing a strong classification by combining a set of weak classifiers. However, the performance of boosting depends on the kernel of weak classifier. Therefore, the hybrid algorithms based on AdaBoost and SVM using the proposed feature descriptors is one of solutions for robust human detection.This paper presents a human detection system based on component detector using multiple feature descriptors. The contribution presents two issues for dealing with the problem of partially obscured human. First, it presents the extension of feature descriptors using multiple scales based Histograms of Oriented Gradients (HOG) and parallelogram based Haar-like feature (PHF) for improving the accuracy of the system. By using multiple scales based HOG, an extensive feature space allows obtaining high-discriminated features. Otherwise, the PHF is adaptive limb shapes of human in fast computing feature. Second, learning system using boosting classifications based approach is used for training and detecting the partially obscured human. The advantage of boosting is constructing a strong classification by combining a set of weak classifiers. However, the performance of boosting depends on the kernel of weak classifier. Therefore, the hybrid algorithms based on AdaBoost and SVM using the proposed feature descriptors is one of solutions for robust human detection

X-ray phase contrast imaging of biological specimens with tabletop synchrotron radiation

Since their discovery in 1896, x-rays have had a profound impact on science, medicine and technology. Here we show that the x-rays from a novel tabletop source of bright coherent synchrotron radiation can be applied to phase contrast imaging of biological specimens, yielding superior image quality and avoiding the need for scarce or expensive conventional sources

Faktor-Faktor Yang Mempengaruhi Mahasiswa Tingkat III Semester V Dalam Menyelesaikan Target Pasien Komprehensif Di Klinik Pendidikan Jurusan Kesehatan Gigi Kupang

Pelayanan asuhan kesehatan gigi dan mulut diberikan kepada masyarakat yang bersifat komprehensif berupa kegiatan promotif, tindakan preventif dan kuratif sederhana, menyelesaikan hygiene pemeliharaan alat-alat kedokteran gigi dan lingkungan kerja. Untuk mengetahui faktor-faktor yang mempengaruhi mahasiswa tingkat III semester V dalam menyelesaikan target pasien komprehensif di klinik pendidikan jurusan kesehatan gigi kupang. Jenis penelitian ini menggunakan penelitian deskriptif yaitu penelitian yang dilakukan dengan tujuan untuk mendapatkan gambaran tentang jumlah mahasiswa yang mengerjakan pasien komprehensif di Klinik Pendidikan Jurusan Kesehatan Gigi Kupang. Motivasi mahasiswa dalam menyelesaikan target pasien komprehensif gigi dan mulut termasuk kategori baik (68,3%), pengetahuan mahasiswa dalam pelayanan asuhan keperawatan gigi dan mulut termasuk kategori kurang (40,5%), tingkat kooperatif pasien dalam pelayanan asuhan kesehatan gigi dan mulut termasuk kategori baik (68,3%). Motivasi mahasiswa dalam menyelesaikan target pasien komprehensif termasuk kategori baik (68,3%) karena mahasiswa berada pada usia kematangan dimana mahasiswa harus berusaha dalam menyelesaiakan target praktikum yang sedang dihadapi. Saran : Meningkatkan kemampuan dan keterampilan peserta didik dengan lebih memperbanyak praktikum serta meningkatkan mutu pelayanan di klinik

Maternal socialization of child emotion and adolescent adjustment: Indirect effects through emotion regulation

A fundamental question in developmental science is how parental emotion socialization processes are associated with children’s subsequent adaptation. Few extant studies have examined this question across multiple developmental periods and levels of analysis. Here, we tested whether mothers’ supportive and nonsupportive reactions to their 5-year-old children’s negative emotions were associated with teacher and adolescent self-reported adjustment at age 15 via children’s physiological and behavioral emotion regulation at age 10 (N = 404). Results showed that maternal supportive reactions to their children’s negative emotions were associated with children’s greater emotion regulation in a laboratory task and also a composite of mother and teacher reports of emotion regulation at age 10. Maternal nonsupportive reactions to their children’s negative emotions were uncorrelated with supportive reactions, but were associated with poorer child physiological regulation and also poorer mother- and teacher-reported emotion regulation at age 10. In turn, better physiological regulation at age 10 was associated with more adolescent-reported social competence at age 15. Furthermore, teacher and mother reports of emotion regulation at age 10 were associated with increased adolescent adjustment across all domains. Mediational effects from nonsupportive and supportive reactions to adolescent adjustment tested via bootstrapping were significant. Our findings suggest that mothers’ reactions to their children’s negative emotions in early childhood may play a role in their children’s ability to regulate their arousal both physiologically and behaviorally in middle childhood, which in turn may play a role in their ability to manage their emotions and behaviors and to navigate increasingly complex social contexts in adolescence