University of Nebraska–Lincoln

About: University of Nebraska–Lincoln is a education organization based out in Lincoln, Nebraska, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 28059 authors who have published 61544 publications receiving 2139104 citations. The organization is also known as: Nebraska & UNL.

A nanocomposite ultraviolet photodetector based on interfacial trap-controlled charge injection.

Abstract: A solution-processed ultraviolet photodetector with a nanocomposite active layer composed of ZnO nanoparticles blended with semiconducting polymers can significantly outperform inorganic photodetectors

Host Plants of Spodoptera frugiperda (Lepidoptera: Noctuidae) in the Americas

Abstract: The fall armyworm, Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae), is the most important noctuid pest in the Americas and has recently become an invasive pest in Africa. A detailed record of S. frugiperda's host plants is essential to better understand the biology and ecology of this pest, conduct future studies, and develop Integrated Pest Management programmes. In this study, we collected and systematically arranged the fragmented bibliographic information on S. frugiperda feeding records. Furthermore, we registered new records of host plants for S. frugiperda based on eight years of surveys in Brazil. The literature review and surveys resulted in a total of 353 S. frugiperda larval host plant records belonging to 76 plant families, principally Poaceae (106), Asteraceae (31) and Fabaceae (31). The literature search revealed 274 (77 % of total) bibliographic records, while 82 (23 %) are new records from surveys in Brazil. The new comprehensive and updated host plant list will improve our understanding of pest biology and management, as well as facilitate future studies on this pest.

Frame Disputes within the Nuclear Disarmament Movement

Abstract: Social movement organizations (SMOs) devote considerable effort to constructing particular versions of reality, developing and espousingalternativevisions, and attempting to affect various audiences' interpretations. Conflicts regarding such interpretive matters, referred to as 'frame disputes," are ubiquitous within movements. Using a multimethod strategy, this study analyzes the dynamics of interorganizationalframe disputes within the nuclear disarmament movement, including their organizational and ideological contexts, conditions conducive to theiremergence, patterns observed, and their effects. Three generic types of disputes are identified and elaborated: diagnostic, prognostic, andframe resonance disputes. Of the 51 disputes observed, all but two involved SMOs from two or more different movement factions. More disputes occurred between the movement's most moderate and radicalfactions than between otherfactions. Intramural conflicts were both detrimental andfacilitative of the disarmament movement and its SMOs. In the most extensive review to date of social movement literature, McAdam, McCarthy and Zald (1988) conclude that we know little about "the dynamics of collective action past the emergence of a movement" (728). Until recently, even less was known about grievance interpretation and communication processes, the essence of movement dynamics. Scholars have begun to address this lacuna by attending to various movement interpretive processes including public discourse (Gamson 1988; Gamson & Modigliani 1989; Steinberg 1989), frame alignment (Benford 1987; Snow & Benford 1988,1992; Snow et al. 1986), grievance interpretation and reality construction (Benford & Hunt 1992; Ferree & Miller 1985; Gusfield 1981; Klandermans 1992; Mauss 1975; Tarrow 1992; Turner & Killian 1987), and collective identity (Friedman & McAdam 1992; Gamson 1991; Hunt 1991; Hunt & Benford 1994; Melucci 1980, 1985, 1988, 1989; Pizzomo 1978; Taylor & Whittier 1992). *This is a revisedversion of apaperpresentedat the annual meetings oftheMidwestSociological Society,April6-9,1989, in St.Louis. Iamgrateful to ScottA.Hunt,MichelleHughesMiller,David A. Snow, and two anonymous reviewersfor their advice and comments on earlier drafts. Please direct correspondence to the author at the Department of Sociology, University of NebraskaLincoln, 703 OldfatherHall, Lincoln, NE 68588-0324. i) The University of North Carolina Press Social Forces, March 1993, 71(3):677-701 This content downloaded from 157.55.39.137 on Fri, 27 May 2016 05:34:23 UTC All use subject to http://about.jstor.org/terms 678 / Social Forces 71:3, March 1993 Although often empirically grounded, the bulk of these developments have been theoretical. Few analyses examine how well these concepts stand up empirically. McAdam, McCarthy and Zald (1988) suggest that "what is needed is more systematic, qualitative fieldwork into the dynamics of collective action at the intermediate meso level . . . the level at which most movement action occurs and of which we know the least" (729). With these considerations in mind, this article analyzes empirically the negotiated and often contentious nature of grievance construction and communication processes within the nuclear disarmament movement by focussing on intramovement frame disputes.

Scalable fabrication of efficient organolead trihalide perovskite solar cells with doctor-bladed active layers

Abstract: Organolead trihalide perovskites (OTPs) are nature abundant materials with prospects as future low-cost renewable energy sources boosted by the solution process capability of these materials. Here we report the fabrication of efficient OTP devices by a simple, high throughput and low-cost doctor-blade coating process which can be compatible with the roll-to-roll fabrication process for the large scale production of perovskite solar cell panels. The formulation of appropriate precursor inks by removing impurities is shown to be critical in the formation of continuous, pin-hole free and phase-pure perovskite films on large area substrates, which is assisted by a high deposition temperature to guide the nucleation and grain growth process. The domain size reached 80–250 μm in 1.5–2 μm thick bladed films. By controlling the stoichiometry and thickness of the OTP films, highest device efficiencies of 12.8% and 15.1% are achieved in the devices fabricated on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate and cross-linked N4,N4′-bis(4-(6-((3-ethyloxetan-3-yl)methoxy)hexyl)phenyl)–N4,N4′-diphenylbiphenyl-4,4′-diamine covered ITO substrates. Interestingly, the carrier diffusion length in doctor-bladed OTP films is beyond 3.5 μm which is significantly larger than in the spin-coated films, due to the formation of crystalline grains with a very large size by the doctor-blade coating method.