UD Spirit Flags will Show Game Day Pride in University

News release announces that UD spirit flags will be available for purchase to show pride on game days

A Systematic Review of Music Therapy Practice and Outcomes with Acute Adult Psychiatric In-Patients

PMCID: PMC3732280This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

Capillary hemangioma associated with dermal atrophy masquerading as a deep fungal infection

Hemangiomas are benign vascular neoplasms which arise in early adulthood. Herein we present a 79-year-old woman with a hemangioma of the lower flank masquerading as a cutaneous manifestation of a systemic fungal infection upon initial histological analysis. Decreased elastin and collagen within the lesion likely accounted for the clumping and splaying of the capillaries into “hyphae-like” structures. Loss of dermal elastic tissue and collagen apparently concentrated the capillary proliferation into an unusual morphology mimicking the hyphal structures. Through additional staining methods the lesion was confirmed to be an unusual presentation of a capillary hemangioma

Capillary hemangioma associated with dermal atrophy masquerading as a deep fungal infection

Hemangiomas are benign vascular neoplasms which arise in early adulthood. Herein we present a 79-year-old woman with a hemangioma of the lower flank masquerading as a cutaneous manifestation of a systemic fungal infection upon initial histological analysis. Decreased elastin and collagen within the lesion likely accounted for the clumping and splaying of the capillaries into “hyphae-like” structures. Loss of dermal elastic tissue and collagen apparently concentrated the capillary proliferation into an unusual morphology mimicking the hyphal structures. Through additional staining methods the lesion was confirmed to be an unusual presentation of a capillary hemangioma

Practical framework for frequency stability studies in power systems with renewable energy sources

The transition from power systems dominated by synchronous machines to systems based on converter-based generation technologies (CGTs), is weakening currently robust power systems by reducing system inertia with the replacement of synchronous generators with low-inertia CGTs. From a frequency stability viewpoint, this is resulting in faster frequency dynamics and more frequent and larger frequency excursions after system contingencies, thus significantly affecting the stability of power systems dominated by CGTs, requiring detailed stability assessments to ensure the secure integration of CGTs. In this paper, a practical framework is presented for frequency stability studies based on time domain simulations of power systems with CGTs. A fundamental part of the proposed approach is the use of a filter to first identify worst-case scenarios among various possible system operating conditions. Once these worst-case scenarios are identified, a clustering technique is used to select representative worst-case operating conditions to evaluate the frequency stability of the system using time-domain simulations. The effectiveness of the proposed framework is demonstrated on the Chilean Northern Interconnected System (NIS), where it is shown that the proposed filter is able to quickly identify worst-case scenarios for further study. Moreover, we show that the selected representative operating conditions cover a wide-range of worst-case frequency responses, demonstrating the effectiveness of the proposed tool for frequency stability analyses.Chilean National Agency for Research and Development ANID/FONDECYT/1201676 ANID/Fondap/1511001