196,049 research outputs found
Amplaria adamsi Shear & Krejca, 2007, n. sp.
No full text<i>Amplaria adamsi</i>, n. sp. <p>Figs. 16–22, 25</p> <p> <i>Types:</i> Male holotype from Hidden Cave, Sequoia National Park, Tulare Co., California, collected 15 November 2003 by Jean Krejca and V. Loftin (FMNH); male and female paratypes from Overhang Cave, Sequoia National Park, Tulare Co., California, collected 29 April 2004 by J. Krejca and P. Sprouse (FMNH).</p> <p> <i>Diagnosis:</i> This species is smaller, more darkly pigmented (Fig. 25), and has more ocelli than <i>A. muiri;</i> details of the gonopods are also different.</p> <p> <i>Etymology:</i> After the late Ansel Adams, an extraordinary photographer whose finest pictures depict the Sierra Nevada.</p> <p> <i>Description:</i> Male: length, 12.0 mm, width, 0.89 mm. Structure much as in <i>A. muiri,</i> but with 5–7 small, irregular, depigmented ocelli. Metazonites with reticulate pattern of purplish brown, darker pigment along posterior borders of metazonites, edges of crests. Legs and antennae light tan to yellowish white. Secondary sexual modifications as described for genus.</p> <p>Gonopods (Figs. 17–22) robust, anterior angiocoxites appressed in midline, apically only gently curved, with even margin lacking teeth, broad, thin lateral branch not much curved, with teeth as shown in Figs. 21, 22; posterior angiocoxites with flagellar sheathing branch long, accessory process extending a little beyond tip of sheathing groove, posterior branch narrow, geniculate, evenly rounded apically. Colpocoxites typical of genus (note: poorly sclerotized lateral lobe of colpocoxite collapses in SEM preparation). Legpair 9 as in Fig. 16.</p> <p>Female: length, 12.0 mm, width, 0.81 mm. Similar to male in nonsexual characters.</p> <p> <i>Distribution:</i> See Table 1 and fig. 23.</p> <p> <i>Habitat and abundance:</i> Thirteen specimens from Hidden Cave, Overhang Cave and Clough Cave were positively identified, and another immature specimen from Windy Pit was tentatively identified (Table 1), and the following data are based on those 14 individuals. Air temperatures were recorded for 10 of those collections and the average air temperature where specimens were collected was 11.2 deg C (range = 8 to 15.3 deg C). Substrates were recorded for 13 of those collections, and 54% (7/13) were found under a rock on the floor, 15% (2/13) were found on a gravel floor, and 8% (1/13) were found on each of these substrates: under woody debris, on a silt floor, on ringtail scat, and on a calcite wall. Of those 13 collections, 62% (8/13) were associated with some kind of energy source, including woody debris, bat guano, ringtail scat, roots, and moldy applesauce. For all fourteen specimens, the average distance they were found into the cave was 74 m (range = 0 to 153 m). On average one <i>A. adamsi</i> was found per 25 linear meters of cave passage (range = 10 m to 70 m), and 54 person minutes of search effort (range = 16 to 154 person minutes).</p> <p> <i>Methods for habitat and abundance:</i> The same methods were used for this species as for <i>Amplaria muiri</i>, above.</p> <p> <i>Notes: Amplaria adamsi</i> has been collected in caves of Cluster 5, namely Clough, Hidden, Overhang, and Windy Pit Caves (Table 1, Fig. 23). Males were not taken in Windy Pit Cave, but it seems unlikely that cave harbors a different species. Noticeably smaller than <i>A. muiri</i> and consistently pigmented, with 5–7 pale ocelli, <i>A. adamsi</i> is at best a troglophile, and surface collecting in suitable habitats would undoubtedly turn it up. Having described these two species, it should be noted that all the caves named on the map (Fig. 23) were visited, many repeatedly, so the absence of strirariids from a given cave is important. Collectors noted, however, that repeat visits continued to produce new species records and that the fauna were sparse and infrequently detected, suggesting that continued search efforts may yield more localities. These two species might be quite local, but in the absence of extensive surface collecting, full distribution of either species has not been established.</p>Published as part of <i>Shear, William A. & Krejca, Jean K., 2007, Revalidation of the milliped genus Amplaria Chamberlin 1941 (Diplopoda, Chordeumatida, Striariidae), and description of two new species from caves in Sequoia and Kings Canyon National Parks, California, pp. 23-39 in Zootaxa 1532</i> on pages 35-38, DOI: <a href="http://zenodo.org/record/177736">10.5281/zenodo.177736</a>
Amplaria muiri Shear & Krejca, 2007, n. sp.
No full textAmplaria muiri, n. sp. Figs. 4–15, 24, 26, 27 Types: Male holotype and female and male paratypes from Crystal Cave, Sequoia National Park, Tulare Co., California, collected 15 July 2003 by Jean Krejca, V. Loftin and S. Fryer, deposited in Field Museum of Natural History, Chicago (FMNH). Diagnosis: Distinct from the nearby A. adamsi, n. sp., in the larger size, fewer ocelli, paler pigmentation, and details of the gonopods as illustrated. Etymology: After John Muir, famous naturalist of the late nineteeth and early twentieth century, whose name is forever connected with the Sierra Nevada, which he called “the Range of Light.” Description: Male. Length, 16.5 mm, width, 1.2 mm. Three, four or five small, irregularly shaped black ocelli in one or two rows. Crest 6 (lateralmost) of collum incomplete, obscure; more prominent on metazonites 2, 3, complete on metazonite 4. Segmental setae of collum to metazonite 5 aciculate, twice as long as intercrest distance, becoming shorter from metazonite 6 posterior, blunt, subclavate, as long as intercrest distance or shorter. Epiproct broad, spatulate. Color of most specimens yellowish white (Figs. 24, 26, 27), few have slight reticulate pattern of pale purplish brown on posterior margins of metazonites 24–29 and epiproct; legs and antennae white. Secondary sexual modifications as described for genus. Gonopods (Figs. 7–11) robust, anterior angiocoxites appressed in midline, apically with three unequal teeth, deltoid lateral branch sharply, evenly curved; posterior angiocoxites with flagellar sheathing branch stout, apically flaring, posterior branch inflated, with curved, toothed ridge. Colpocoxites typical of genus (note: poorly sclerotized lateral lobe of colpocoxite collapses in SEM preparation). Legpair 9 as in Fig. 15. Female: length, 15.2 mm, width, 1.0 mm. Except for secondary sexual characters, much as male. to be contineud. Distribution; See Table 1 and fig. 23. Habitat, abundance and life history: Eighty-four specimens from Bear Den Cave, Carmoe Crevice, Crystal Cave, Hurricane Crawl Cave, Lange Cave, and Pet Cemetery Cave were positively identified, and another nine immature and female specimens from Lilburn Cave and Weisraum Cave were tentatively identified (Table 1), and the following data are based on those 93 individuals. Air temperatures were recorded for 75 of those collections and the average air temperature where specimens were collected was 10.4 deg C (range = 8.3 to 12.5 deg C). Substrates were recorded for 37 of those collections: 43 % (16 / 37) were found on a silt floor, 24 % (9 / 37) were found on a dead small mammal, 16 % (6 / 37) were found on roots, 11 % (4 / 37) were found on calcite, and 5 % (2 / 37) were found under a rock. Of those 37 collections, 73 % (27 / 37) were associated with some kind of energy source, including fungus, roots, a dead mammal or bait on a pitfall trap. For all 93 specimens, the average distance they were found into the cave was 80 m (range = 0 to 166 m). Also on average one A. muiri was found per 7 linear meters of cave passage (range = 1 m to 48 m). For 82 specimens with records of search effort, on average 18 person minutes were spent to find one millipede (range = 4 to 98 person minutes). On two occasions Amplaria muiri were observed mating (Fig. 27). On 15 July 2003, two individuals in the Whitewash Canyon section of Crystal Cave were observed mating on a fluffy sandy silt floor. On 13 October 2006, two individuals in the passage below the rope drop of Carmoe Crevice were observed mating on a gravel floor. A third individual was nearby and probably involved, as it was seen curled up so that its mouth was near its gonopods. Also on 13 October 2006, an unusual abundance of individuals were seen feeding on the seed of a California Bay Laurel, Umbellularia californica. Approximately thirty individuals were seen within 5 meters of the food item, and this abundance of prey also probably attracted a potential predator, the salamander Ensatina eschscholtzii (Fig. 26). Methods for habitat, abundance and life history: Temperatures were measured using an alcohol thermometer, and they were measured at locations in the same area of the cave the specimen was taken from, but not always exactly at that spot. Distances into the cave were calculated from survey stations measured during cave mapping, and these represent actual line of travel through the cave, not a straight line distance to the entrance that may be impossible to follow because it is through bedrock. The distance each organism was found into the cave was calculated for the search area the specimen was found in. The search area is bound by two survey stations, and if the closest survey station to the entrance is 10 meters into the cave and the farthest one is 20 m into the cave, the distance that specimen was found from the entrance is calculated at 15 m into the cave. The range that individual was found at is 10 to 20 m from the entrance. The distance between these two stations is an approximate measure of search area, in this case 10 linear meters of passage. In the cases of two long caves, Crystal Cave and Hurricane Crawl Cave, the distances were estimated based on personal experience in the cave. The search time was calculated as person minutes spent in that area, and this time also includes searching for non-millipede taxa, and time to collect specimens and record data. Furthermore, not every millipede seen was collected and these data are based on collected specimens, so the data may slightly overestimate rarity. Notes: The caves of Sequoia National Park and Kings Canyon National Park, explored by JKK and her associates during a survey of cave fauna for the National Park Service, occur in five distinct clusters (Fig. 23), which we have arbitrarily numbered 1–5 from north to south. Amplaria muiri has only been found in the caves of cluster 2. Unidentifiable striariids (males were not collected) were found in Lilburn Cave in cluster 1; these could also be A. muiri. As shown in Table 1, millipeds attributable to A. muiri were collected in Bear Den Cave, Carmoe Crevice, Crystal Cave, Hurricane Crawl Cave, Lange Cave, Pet Cemetery Cave and Weisraum Cave. Males were not available from the last listed of these caves, but geography makes a good case that the specimens taken in Weisraum Cave are A. muiri. Specimens from Hurricane Crawl Cave and Weisraum Cave were moderately well-pigmented, but those from the other caves were pale yellowish white. Because no attempt was made to collect extensively in the forest litter and soil near the caves or elsewhere in the parks, it is not possible to say if A. muiri is cave-limited. The legs and antennae are not inordinately long, and while at the large end of the size spectrum of Amplaria species (except for the giant A. shastae), a convincing picture of troglobiosis is not presented. The pale populations may represent permanent cave residents (troglophiles) but still may be in reproductive contact with surface populations.Published as part of Shear, William A. & Krejca, Jean K., 2007, Revalidation of the milliped genus Amplaria Chamberlin 1941 (Diplopoda, Chordeumatida, Striariidae), and description of two new species from caves in Sequoia and Kings Canyon National Parks, California, pp. 23-39 in Zootaxa 1532 on pages 28-35, DOI: 10.5281/zenodo.17773
Nevadesmus ophimontis Shear, new species
No full textNevadesmus ophimontis Shear, new species Figs. 3, 7, 10, 25–31, 36, 37. Types: Male holotype, male and two female paratypes from Model Cave, White Pine Co., Nevada, collected 23 May 2003 by S. J. Taylor, J. K. Krejca, K. Patel, M. Porter, K. Dittmar de la Cruz, deposited in FMNH. The following specimens (deposited at FMNH and INHS) are also paratypes: NEVADA: White Pine Co., same data as holotype, but collected 22 May 2006 by J. K. Krejca, M. E. Slay, G. Baker, 2 females; Snake Creek Cave, 29 May 2003, S. J. Taylor, J. K. Krejca, K. Patel, L. D. Seale, A. Hamilton, S. Johnson, 5 females; 21 May 2006, S. J. Taylor, J. Krejca, M. E. Slay, 3 males, juveniles; Lehman Caves, 26 May 2006, S. J. Taylor, J. K. Krejca, M. E. Slay, G. Baker, 3 males, 3 females; Little Muddy Cave, 23 May 2003. S. J. Taylor, J. K. Krejca, M. Porter, K. Dittmar de la Cruz, a juvenile male presumed this species; Wheeler’s Deep Cave, 26 May 2003, S. J. Taylor, J. K. Krejca, M. Porter, K. Dittmar de la Cruz, 2 males, 2 females. Description: Male: Length, 4.5 mm, width 0.45 mm (Fig. 37). Antennae short, clavate; head about 40 % wider than collum. Collum with arcuate anterior margin bearing 12 short, clavate setae, posterior margin slightly procurved, with 6 (5) marginal setae. Second segment slightly wider than collum. Typical midbody segment (segment 10; Fig. 3) with inconspicuous paranota, two paranotal teeth on each side (possible third tooth is directly opposite ozopore), posteriolateral corner right-angled to slightly obtuse, not drawn out beyond ozopore into sharp process. Metazonital setae on modest tubercles, short, clavate; anterior row of six, with lateralmost setae on each side posteriorly displaced; middle row of four setae, slightly procurved; marginal posterior row of four (six on some segments) setae; usual triad of setae subtends ozopore. Pygidium (Fig. 7) short, rounded, with eight setae, pygidial process very short, blunt, bearing usual four spinnerets. Pregonopodal legs encrassate. Gonopods (Figs. 25–31) with hemispherical coxae tightly appressed in midline, excavated to receive retracted telopodites. Prefemora densely setose, strongly transverse, articulating process acute; exomere arising from anteriomesal margin of prefemur, long, thin, sinuous. Endomerite from distolateral edge of acropodite, basally broad, incurved, ending in three unequal processes, middle one longest. Subtending process of solenomere is set low and laterally on acropodite, seminal pore with relatively few cuticular teeth. Female: Length, 4.8 mm, width 0.5 mm. Nonsexual characters as in male; cyphopods not studied. Distribution and habitat: As shown by the map (Fig. 36), the caves occupied by Nevadesmus ophimontis are relatively closely clustered, and all are located in Great Basin National Park. Model Cave is a large cave (length 599.9 meters [1968.1 feet]) at an elevation of 2080 meters (6824 feet). The fauna of Model Cave is dominated numerically by Collembola, followed by mites, mayflies, and flies. Globular springtails (Arrhopalites spp.) including an undescribed species, were particularly abundant. In addition to N. ophimontis, three troglobitic or troglophilic species are present, including the sclerobunine harvestman Cyptobunus ungulatus ungulatus Briggs, the conotylid milliped Idagona lehmanensis Shear (see Shear 2006), and the pseudoscorpion Microcreagris grandis Muchmore. Surrounding vegetation (Fig. 38) for all the caves listed as supporting populations of N. ophimontis is Great Basin pinyon-juniper woodland (SWReGAP land cover type; Lowery et al. 2006). Lehman Caves, at an elevation of 2096 meters (6877 feet), is the largest (length ~3352.8 meters [~ 11,000 feet]) cave in the Great Basin National Park. The fauna includes Collembola, Diptera, and mites, in addition to M. grandis and N. ophimontis. Notably absent from the Lehman Caves, in spite of intensive collecting, were C. ungulatus ungulatus and Idagona lehmanensis. Eight taxa of Collembola have been collected in this cave. Little Muddy Cave is a large cave (length 309 meters [1010.5 feet]) at an elevation of 2045 meters (6709 feet). Microcreagris grandis occupies this cave; it is a possible predator on N. ophimontis. Snake Creek Cave is a large (length 51.3 meters [1682 feet]) cave at an elevation of 2030 meters (6660 feet), and located on a fairly barren, south facing slope (Fig. 38). Springtails and the psocopteran Speleketor sp. were dominant in collections. Wheeler’s Deep Cave is one of four interconnected caves making up the Baker Creek Cave System, Nevada’s longest cave (length 1315 meters [4315 feet]). It is located at an elevation of 2147 meters (7044 feet) in a limestone outcrop adjacent to the riparian zone of Baker Creek. Cyptobunus ungulatus ungulatus and N. ophimontis are fairly common in the deeper, wetter parts of this cave, where a perennial stream is present. Etymology: The species name refers to the Snake Mountain Range, and to Snake Valley, major geographical features associated with the collection localities.Published as part of Shear, William A., Taylor, Steven J., Wynne, Judson & Krejca, Jean K., 2009, Cave millipeds of the United States. VIII. New genera and species of polydesmidan millipeds from caves in the southwestern United States (Diplopoda, Polydesmida, Macrosternodesmidae), pp. 47-65 in Zootaxa 2151 on pages 59-61, DOI: 10.5281/zenodo.18872
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Synergizing Theory and Practice of Automated Algorithm Design for Optimization (Dagstuhl Seminar 23332)
No full textThis report documents the program and the outcomes of Dagstuhl Seminar 23332, which focused on automated algorithm design (AAD) for optimization. AAD aims to propose good algorithms and/or parameters thereof for optimization problems in an automated fashion, instead of forcing this decision on the user. As such, AAD is applicable in a variety of domains. The seminar brought together a diverse, international set of researchers from AAD and closely related fields. Especially, we invited people from both the empirical and the theoretical domain. A main goal of the seminar was to enable vivid discussions between these two groups in order to synergize the knowledge from either domain, thus advancing the area of AAD as a whole, and to reduce the gap between theory and practice. Over the course of the seminar, a good mix of breakout sessions and talks took place, which were very well received and which we detail in this report. Efforts to synergize theory and practice bore some fruit, and other important aspects of AAD were highlighted and discussed. Overall, the seminar was a huge success
Arrhopalites caecus Tullberg 1871
No full textArrhopalites caecus (Tullberg, 1871) Material examined. USA: CALIFORNIA: Siskiyou Co.: Coral Reef Cave, 12 -vi-05, S.J. Taylor, J.K. Krejca, J. Jacoby; NEVADA: White Pine Co.: Snake Creek Cave, 12 -v-06, S.J. Taylor, J.K. Krejca, M.E. Slay, G. Baker; Lehman Cave, 26 -v-06, J.K. Krejca, M.E. Slay, G. Baker, B. Roberts, M. Horner. Remarks. This is the first record for California and Nevada, the species A. caecus has a world wide distribution.Published as part of Zeppelini, Douglas, Taylor, Steven J. & Slay, Michael E., 2009, Cave Pygmarrhopalites Vargovitsh, 2009 (Collembola, Symphypleona, Arrhopalitidae) in United States, pp. 1-18 in Zootaxa 2204 on page 14, DOI: 10.5281/zenodo.18968
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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