TTU DSpace Repository

DSpace is a digital service that collects, preserves, and distributes digital material. Repositories are important tools for preserving an organization's legacy; they facilitate digital preservation and scholarly communication.

 

Communities in DSpace

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Recent Submissions

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Tiny spies: mosquito antennae are sensitive sensors for eavesdropping on frog calls
(2023) Pantoja-Sánchez, Hoover; Leavell, Brian C.; Rendon, Bianca (TTU); P. de-Silva, W. A.Priyanka; Singh, Richa; Zhou, Jian; Menda, Gil; Hoy, Ronald R.; Miles, Ronald N.; Sanscrainte, Neil D.; Bernal, Ximena E.
Most mosquito and midge species use hearing during acoustic mating behaviors. For frog-biting species, however, hearing plays an important role beyond mating as females rely on anuran calls to obtain blood meals. Despite the extensive work examining hearing in mosquito species that use sound in mating contexts, our understanding of how mosquitoes hear frog calls is limited. Here, we directly investigated the mechanisms underlying detection of frog calls by a mosquito species specialized on eavesdropping on anuran mating signals: Uranotaenia lowii. Behavioral, biomechanical and neurophysiological analyses revealed that the antenna of this frog-biting species can detect frog calls by relying on neural and mechanical responses comparable to those of non-frog-biting species. Our findings show that in Ur. lowii, contrary to most species, males do not use sound for mating, but females use hearing to locate their anuran host. We also show that the response of the antennae of this frog-biting species resembles that of the antenna of species that use hearing for mating. Finally, we discuss our data considering how mosquitoes may have evolved the ability to tap into the communication system of frogs.
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Mapping Media Developments and Issues: Topics, Clusters, and Content of JMCQ Articles on Communication Technology/Media Channels, 1935–2017
(2023) Rice, Ronald E.; Bucy, Erik P. (TTU)
This study analyzed JMCQ articles in the specific topic area of mass communication technology and media channels, overall and across four 20-year periods. Primary topics changed from emphasizing media industry and policy issues, international issues of information freedom, audience research, and WWII media issues in early periods to more specific regulatory issues, ratings and audience analyses, macro and social issues, and media technology development issues in more recent periods. JMCQ serves as a treasure trove of the history of broadcast media technology and competition, policy debates, and audience interests, with a recent emphasis on more rigorous empirical analyses.
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Water buffalo versus cattle under similar rearing condition. II. Eating and nutritional quality
(2023) Huerta-Leidenz, Nelson O. (TTU); Rodas-González, Argenis
Buffalo meat is generally perceived as poor and inferior to beef. Conversely, there is strong advocacy in favor of the nutritional properties of Buffalo meat. Most studies have not compared the quality of meats from water buffalo and cattle produced under the same experimental conditions. This review discusses results from 24 selected experiments reporting eating and(or) nutritional qualities of meats from both species reared under similar feeding and environmental conditions. The evidence reveals the potential of young buffaloes to produce comparable or higher-quality meat than cattle counterparts. Under the same production conditions these species are similar in meat nutrient composition.
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Water buffalo versus cattle under similar rearing condition. I. Growth and carcass performance
(2023) Rodas-González, Argenis; Huerta-Leidenz, Nelson O. (TTU)
Buffalo has shown a favorable growth performance regarding weight gains under grazing conditions rather than feeding them with concentrate rations. While buffalo may have a heavier body, its dressing yield is lower than cattle due to a higher percentage of non-carcass components, specifically the hide and head. Buffalo evidence more desirable carcass attributes than cattle, so their carcasses might show advantages when graded by quality. Both species present a high variation in carcass yield of individual subprimals. However, buffalo offers a high yield in some high-value subprimals, allowing different muscle-specific commercialization strategies.
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Continuous Authentication Using Human-Induced Electric Potential
(2023) Murali, Srinivasan; Jin, Wenqiang; Sivaraman, Vighnesh; Zhu, Huadi; Ji, Tianxi (TTU); Li, Pan; Li, Ming
Most terminal devices authenticate users only once at the time of initial login, leaving the terminal unprotected during an active session when the original user leaves it unattended. To address this issue, continuous authentication has been proposed by automatically locking the terminal after a period of inactivity. However, it does not fully eliminate the risk of unauthorized access before the session expires. Recent research has also investigated the feasibility of using physiological and behavioral patterns as biometrics. This study presents a novel two-factor continuous authentication that explores a new form of signal called human-induced electric potential captured by wearables in contact with the user's body. By analyzing this signal, we can determine the time of user-terminal interactions and compare it with information recorded by the terminal's OS. If the original user remains on the same terminal, the two-source readings would match. Additionally, the proposed scheme includes an extra layer of protection by extracting terminal's physical fingerprints from the human-induced electric potential to defend against advanced mimicry attacks. To test the effectiveness of our design, a low-cost wearable prototype is developed. Through extensive experiments, it is found that the proposed scheme has a low error rate of 2.3%, with minimal computational and energy requirements.