Results 51 to 60 of about 627,419 (279)

Sharp Time--Data Tradeoffs for Linear Inverse Problems [PDF]

open access: yes, 2016
In this paper we characterize sharp time-data tradeoffs for optimization problems used for solving linear inverse problems. We focus on the minimization of a least-squares objective subject to a constraint defined as the sub-level set of a penalty ...
Oymak, Samet   +2 more
core  

Managing the meniscus part I—Anatomy, biomechanics, and treatment strategies for the atraumatic meniscus tear

open access: yesKnee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose The purpose of this article is to serve as the first of a two‐part review on the meniscus; in this review, we will establish the background on anatomy and pathogenesis of the meniscus, as well as the effect of the meniscus on native knee kinematics and function.
Ehab M. Nazzal   +13 more
wiley   +1 more source

Factoring nonnegative matrices with linear programs [PDF]

open access: yes, 2012
This paper describes a new approach, based on linear programming, for computing nonnegative matrix factorizations (NMFs). The key idea is a data-driven model for the factorization where the most salient features in the data are used to express the ...
Bittorf, Victor   +3 more
core   +1 more source

Managing the meniscus Part 2: Traumatic tear patterns, biologic augmentation, transplantation, innovation and future research

open access: yesKnee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Acute, traumatic meniscus tears are common and should be repaired whenever possible. However, the biological age of the patient, along with the specific tear morphology, may significantly influence the selection of the repair technique, expected clinical outcomes and the postoperative rehabilitation protocol.
Armin Runer   +15 more
wiley   +1 more source

Inferior clinical outcomes and higher subjective treatment failure after revision compared to primary posterior cruciate ligament reconstruction: A propensity score‐matched analysis

open access: yesKnee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose To compare subscales of the Knee injury and Osteoarthritis Outcome Score (KOOS), concomitant injuries and failure rates between patients undergoing primary and revision posterior cruciate ligament reconstruction (PCLR). Methods This study was based on three major Scandinavian knee ligament registries (Sweden, Norway, Denmark). Patients
Philipp Wilhelm Winkler   +8 more
wiley   +1 more source

Shaping Manager Well‐Being and Functioning in Declining Nonprofit Organizations: The Critical Role of Strategy Implementation

open access: yesNonprofit Management and Leadership, EarlyView.
ABSTRACT Under the roof of Christian churches in Central Europe, some nonprofit organizations (NPOs) grow, while others are in marked decline. Our study in this context extends a previous focus on financial indicators to NPO managers' experiences, their role clarity and job satisfaction, during phases of organizational growth and decline. Specifically,
Max Niehoff, Johannes Stark
wiley   +1 more source

Ethische und rechtliche Bewertung von Maßnahmen der polizeilichen Drohnenabwehr

open access: yesTATuP – Zeitschrift für Technikfolgenabschätzung in Theorie und Praxis, 2018
Die zunehmende Nutzung von unbemannten Flugsystemen (Unmanned Aerial Vehicles [UAV] – nachfolgend: Drohnen) birgt neue Gefährdungspotenziale für die zivile Sicherheit.
Jessica Heesen   +2 more
doaj   +1 more source

Zukunftstechnologien bei der Stromerzeugung: Elektrizität im internationalen Vergleich

open access: yesPhysik in unserer Zeit, EarlyView.
Welche Technologien setzen sich bei der Stromerzeugung gerade durch? Die Antwort sieht man eindeutig in den Trends von weltweiten Stromerzeugungsdaten. Analysiert man diese Daten mithilfe der Theorie der Diffusion von Innovationen, dann zeigt sich, wie Photovoltaik und Wind sich weltweit durchsetzen.
Axel Kleidon, Harald Lesch, Russ Conser
wiley   +1 more source

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