Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 109 for “"pitfall"”.
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A Pitfall in the Construct Validation of Ability Tests
This thesis is about problems in the theory and practice of the construct validation of ability tests. The main point is that there is a danger that people following the guidelines to be found in the construct validation literature will reach unjustified conclusions about which constructs tests …
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Variability in north temperate dung beetle assemblages at different spatial and temporal scales
… by dung pad cohort samples and dung baited pitfall trapping were compared. Generally, the rank order of abundance of dung beetle species was significantly correlated between pitfall catches and cohort pad samples. Across different dung sizes, in both pitfall catches and cohort pad samples, …
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Generalist predators in reduced-tillage corn: predation on armyworm, habitat preferences, and a method to estimate absolute densities
… populations were reduced, through the use of pitfall traps and exclusion arenas, than in the control where predator populations were unaltered. The differences in the proportion of damaged plants and the degree of damage between the predator removal treatment and the control were statistically …
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The effect of native forest dynamics upon the arrangements of species in oak forests-analysis of heterogeneity effects at the example of epigeal arthropods
… The spider were collected in a block design by pitfall traps (n=72) in a 4-week interval. To reveal key environmental factors affecting the spider distribution abiotic and biotic habitat parameters (e.g. vegetation parameters, climate parameters, soil moisture) were assessed around each pitfall …
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Comparison of herpetofaunal species composition and response to edge on the Camp Dawson Collective Training Area, Preston County, West Virginia
… 4715.3. Herpetofauna were sampled using pitfall traps with drift fences and double-ended funnel traps, and also from area searches. Redback salamander (Plethodon cinereus), red-spotted newt (Notophthalmus v. viridescens ), eastern American toad (Bufo a. americanus), and wood frog (Rana …
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The influence of an umbelliferous understory on the parasites of organic apple orchards in Canterbury
… Adult parasites were trapped using yellow pitfall traps, elevated water traps and aspiration from parsnip inflorescences. 'Delta' pheromone traps were used to trap male codling moth and lightbrown apple moth. Ground dwelling predators were collected by yellow pitfall trap. The influence of …
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The effects of invasive knotweed (Fallopia japonica) on invertebrate communities in western New York
… many types of invertebrates as possible, we used pitfall traps as well as designed a cost-effective window trap alternative using a painted plastic bottle. We placed fifteen pairs of pitfall and bottle insect traps in three seasons in invaded areas and nearby control areas across seven parks in …
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Keanekaragaman arthropoda permukaan tanah pada cagar alam manggis gadungan dan perkebunan kopi mangli di Kecamatan Puncu Kabupaten Kediri
… langsung) 30 plot, dan metode nisbi dengan Pitfall Trap 30 buah pada masing-masing lahan. Hasil penelitian pada Cagar Alam Manggis Gadungan 22 famili dan 3062 individu meliputi herbivora (5 famili), predator (12 famili), detrivor (1 famili), dekomposer (4 famili), perkebunan kopi 19 famili …
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Keanekaragaman makrofauna tanah pada perkebunan apel semi organik dan anorganik Desa Poncokusumo Kabupaten Malang
… mutlak (Pengamatan Langsung) dan metode nisbi (Pitfall Trap dan Berlese Funnel). Hasil penelitian pada perkebunan apel Semi Organik terdiri dari 9 ordo, 18 famili dan 711 individu meliputi herbivor (4 famili), predator (10 famili) dan pengurai (4 famili), lahan Anorganik terdiri dari 9 ordo, 16 …
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Learning to Coordinate Efficiently through Multiagent Soft Q-Learning in the presence of Game-Theoretic Pathologies
… models on learning to get a sense of whether the pitfall is due to sampling inefficiencies or underlying assumptions of the multiagent soft Q-learning extension (MASQL). We use the word sampler to refer to mechanisms that allow one to get samples from a given (target) distribution. After having …
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Efecto de las aplicaciones de insecticida chlorpyrifos (Lorsban) sobre las poblaciones de plagas y enemigos naturales en el agroecosistema de maiz (Zea mays L.) época de riego, 1996
… visuales, trampas amarillas y trampas de caida (pitfall). Los arthropodos muestreados fueron agrupados como: depredadores y parasitoides, estos insectos fueron separados por familia, género y especie hasta donde era posible. Los principales parasitoides encontrados en las trampas amarillas …
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Assessment of animal diversity in Pulau Tinggi, Mersing, Johor for conservation and indicator for potential wildlife tourism
… applied to different animal groups. Drift fence pitfall traps and visual encountered surveys were used in the herpetofauna survey. Mist nets were used in bats, while cage traps and camera traps were used for other mammals on the island. Pitfall traps, light traps, and hand catching methods were …
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Keanekaragaman serangga pada perkebunan teh Wonosari Lawang dengan dan tanpa aplikasi pestisida
… menggunakan metode nisbi (dengan perangkap Pitfall trap, Window trap dan Light trap). Hasil penelitian pada area bebas pestisida diperoleh 9 ordo, 23 famili, dan 336 individu yang berperan sebagai pollinator (2 famili), parasitoid (2 famili), herbivora (8 famili), scavenger (3 famili) dan …
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A Study of Habitat Selection and Fluctuating Asymmetry of <em>Amybstoma tigrinum</em> at Henderson Island Wildlife Management Area in Jefferson County TN.
… wetland. Drift fences were installed with pitfall traps at selected locations around each pond to determine nonbreeding habitat use by adults. Most adult salamanders were found using a blackberry (<em>Rubus sp.</em>) dominated old-field, a grassy field, and a shrub-grass mix field, which …
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Imbalanced learning using actuarial modified loss function in tree-based models
… simple dataset, this thesis first pinpoints the pitfall in the traditional tree-based algorithm’s splitting function. This thesis then modifies the function to remedy the imbalance issue presented in the insurance loss modeling. We propose two novel actuarial modified loss functions, namely, …
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Amphibian Habitat Usage of Two Restored Bogs in Shady Valley, Johnson County, Tennessee.
… management strategies. Survey methods included pitfall traps, funnel traps, coverboard arrays, and opportunistic surveys.</p>
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Vertical integration and the portability of skill sets in high tech industries
… stage in the same chain, offering a potential pitfall to those who seek to vertically integrate. This thesis explores the experience of one company's efforts to integrate vertically to capture profits enjoyed by their customers. Through a lack of appreciation for the complexity of the …
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Keanekaragaman Arthropoda pada lahan bawang merah semi organik dan anorganik Desa Torongrejo Kota Batu
… yaitu 2,21, sedangkan dengan metode relatif (pitfall Trap) semi organik yaitu 1,76 dan lahan anorganik 1,59. ENGLISH: Shallots are a fair amount of vegetables cultivated in the Stone. Onion cultivation in the Torongrejo village of Batu using the concept of semi organic and inorganic farming. …
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Using Learning to Rank Approach to Promoting Diversity for Biomedical Information Retrieval with Wikipedia
… is independent of other documents. However, the pitfall of this is the high redundancy and low diversity of retrieval result. This has been seen in many scenarios, especially in biomedical IR, where the information need of one query may refer to different aspects. Promoting diversity in IR takes …
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An assessment of a herpetofaunal community in Hamilton, County, Tennessee: baseline ecology, species richness, and relative abundance
… Utilizing drift fencing in conjunction with pitfall arrays, a total of 14 reptile species and 16 amphibian species was recorded. Evenness was low among all study years due to large sample sizes of ambystomatid salamanders relative to all other species. Body sizes of Ambystoma were larger in …
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