197,027 research outputs found
Vegetation survey in the steppic rangelands of Algeria
No full textThis data set include 30 vegetation transects of 200 m length each, sampled by point intercept method every 20 cm. Vegetation community: North Africain steppic rangelands . Species code include
Cherax acherontis Patoka & Bláha & Kouba 2017, n. sp.
No full textCherax acherontis Patoka, Bláha and Kouba, n. sp. Figs 1–3, 6 Diagnosis. Carapace surface smooth except for numerous small, blunt, indistinct, tubercles posterior and ventrolateral to the cervical groove. Eyes small, reduced, and pigmented with eyestalk prominently broader than cornea. Rostrum lanceolate in shape, setose with lateral margins elevated. Rostral length/width ratio range 2.0–3.5. Rostral margins with 2–4 prominent teeth. Rostral carinae developed. Postorbital ridges prominent with one very short acute tubercle at anterior terminus. Median carina present but very indistinct. Very broad semicircular scaphocerite broadest at midlength with a single distinct spine at terminus of apex. Antennular peduncle more or less reaching behind acumen, antennal peduncle reaching behind apex of scaphocerite. Antennae longer than body. Lateral margins of epistome separated by narrow row of small tubercles. Third maxillipeds long and covered by dense long setae. Areola length/width ratio range 2.2–3.7. Uncalcified patch on lateral margin of chelae of adult male absents. Chelae length/width ratio range 2.3–5.3, width/depth ratio range 1.3–2.5. Cutting edge of dactyl with row of very small granules, while cutting edge of opposite propodus with one prominent tubercle. Fingers slightly gaping, in distal part with hooked tips, cutting edges setose. Entire inner lateral margin of palm covered with two or three rows of numerous bluntly topped teeth with short setose hairs. Outer margin of palm with small teeth near its basal part. Colouration of body and appendages mostly ochre and body surface slightly marbled. Gonopores of both sexes normal in shape and position. Terminal half of caudal fan soft and membranous. Description of holotypic male. (Fig 1–3). Eyes pigmented and reduced. Body subovate, slightly compressed laterally, pigment reduced. Cephalothorax 1.1 times broader than pleon. Rostrum (Fig. 3A, B) 2.2 times as long as wide, reaching beyond the end of second segment of antennular peduncle. Upper rostral surface smooth and setose. Acumen with anteriorly oriented spine at terminus. Median carina present but only slightly prominent on the cephalon, on the rostrum absents. Lateral rostral margins elevated, anteriorly convergent throughout length to acumen, posteriorly continuing in prominent carinae ending indistinctly behind the level of postorbital ridge spines. Lateral rostral margins bearing three pairs of teeth distally, distal part and upper surface of rostrum covered with dense setose hairs. Postorbital ridges (Fig. 3A, B) prominent, strongly elevated, posteriorly fading and in the last third of the cephalon indistinct. Anterior terminus of postorbital ridges with slightly upturned short spiniform tubercle. Eyes (Fig. 3A) very small; cornea globular, darkly pigmented, eyestalk prominently broader than cornea. Antennulae and antennae normal in shape. Antennae longer than body. Antennular peduncle reaching behind acumen, antennal peduncle reaching behind apex of scaphocerite. Coxicerite of antennal peduncle with blunt tubercle anteriorly. Scaphocerite (Fig. 3F) flat and horizontal, broad semicircular in shape, narrower in basal part, with lamina 1.8 times as long as broad, broadest at midlength; not reaching behind antennular peduncle; short prominent acute spiniform tubercle at apex reaching distinctly beyond the lamina; rounded inner margin strongly covered by setae. Third maxillipeds reaching 0.7 of CTL, covered by dense and long setae (Fig. 3G); epistome (Fig. 3E) with subcordiform cephalis lobe anteriorly bearing rounded cephalomedian projection constricted at base; each side covered with two groups of small tubercles separated by a smooth area; central part smooth with fovea, not pitted; lateral margins separated by narrow row of small tubercles; posterior margin of cephalomedian projection with short setose hairs, not pitted; epistomal zygoma prominent and thick, moderately arched with oblique arms. Dorsal surface of carapace smooth, with exception of numerous small blunt and indistinct tubercles posterior and ventrolateral cervical groove. Areola three times as long as wide at the narrowest part. Length of areola 39% of TCL; surface smooth, slightly pitted, formed by two parts in first third. Cervical groove distinct, non-setose. Chelipeds and chelae (Figs. 3C, D) equal in form and size; 4.3 times as long as broad and 6.7 times as long as deep; chela surface smooth, pitted; fingers 1.3 times longer than palm; chela equally long as carapace; fingers slightly gaping; slightly convex dactyl tapering to the tip; cutting edge setose with five rather small granular teeth over the full length, one larger tooth at basal third. Fixed finger narrow and 1.4 times broader than dactyl at base; cutting edge setose with 7 to 11 rather small granular teeth in two rows. Tips of fingers with acute, hooked spines slightly crossing when fingers clasp. Entire inner lateral margin of palm covered with two or three rows of numerous bluntly topped teeth with short setose hairs. Outer margin of palm with eight small teeth near its basal part. Carpus smooth and pitted; with one well-developed acute and hooked spiniform tubercle in the middle of dorsolateral inner margin (mentioned tubercle is characteristic for genus Cherax) and numerous smaller tubercles; terminated with one spiniform tubercle oriented anteriorly. Ventral carpal surface non-setose, with fovea. Merus strongly laterally depressed in basal part; surface smooth and pitted; one prominent anteriorly oriented tooth and row of small anteriorly oriented tubercles (serrate carina) present on dorsal surface; one prominent anteriorly oriented tooth and row of small tubercles present on ventral surface; two prominent anteriorly oriented teeth and row of small tubercles on entire inner ventrolateral margin. Second pereiopod reaching behind apex of scaphocerite. Palm equally long as fingers; fingers and palm sparsely setose; tip of dactylus hooked; cutting edges of both fingers densely setose. Carpus 1.4 times longer than palm. Merus 1.6 times longer than carpus and 2.3 times longer than ischium. Third pereiopod 1.3 times longer than second pereiopod, palm 1.2 times longer than fingers; fingers and palm sparsely setose; tip of dactylus hooked; cutting edges of both fingers densely setose. Carpus 1.1 times longer than palm. Merus 1.6 times longer than carpus and 2.6 times longer than ischium. Fourth pereiopod reaching behind the end of antennal peduncle. Propodus and dactyl strongly setose. Dactyl slightly hooked and densely setose on cutting edge. Propodus 1.4 times longer than carpus. Merus 2.2 times longer than carpus and 2.4 times longer than ischium. Fifth pereiopod reaching midlength of scaphocerite. Propodus and dactyl strongly setose. Dactyl slightly hooked and densely setose on cutting edge. Propodus 1.7 times longer than carpus. Merus 2.1 times longer than carpus and 2.6 times longer than ischium. Dorsal surface of pleon smooth in median region and sparsely setose; pleura smooth, pitted. Each pleomere strongly setose with short hairs on ventral posterior margin. Telson with two posteriorly directed spiniform tubercles in caudolateral corners. Protopod of uropod with single posteriorly directed spiniform tubercle on distal margin. Endopod of uropod with two posteriorly directed spiniform tubercles in the middle and outer margin of mesial lobe. Exopod of uropods with transverse row of posteriorly directed diminutive spiniform tubercles ending in posteriorly directed spiniform tubercles on outer margin of mesial lobe. Terminal half of caudal fan soft, membranous, setose on the posterior margin. Description of allotypic female. (Fig 4). Differing from the holotype in the following respects: the chelae 5.0 times as long as broad and 8.3 times as long as deep; carapace 1.4 times longer than chela. Pleon equally broad as cephalothorax; areola 2.2 times long as wide at the narrowest part. Remarks. The single, well-developed, acute and hooked spiniform tubercle in the middle of the dorsolateral inner carpus margin is characteristic of Cherax. Right cheliped of holotype was autotomized during the transport. The allotype was without any visible damages. Size. Holotype: ♂, TL = 128 mm, TCL = 62 mm, PCL = 48 mm, RW = 5 mm, RL = 14 mm, AW = 8 mm, AL = 24 mm, ChW = 14 mm, ChL = 60 mm, ChD = 9 mm. Allotype: ♀, TL = 81 mm, TCL = 36 mm, PCL = 27 mm, RW = 4 mm, RL = 9 mm, AW = 6 mm, AL = 13 mm, ChW = 5 mm, ChL = 25 mm, ChD = 3 mm. Paratypes: ♂ (n = 23), TL = 50–140 mm (x̄= 78 mm, SD = 21.6 mm), TCL = 24–66 mm (x̄= 36 mm, SD = 10.2 mm), PCL = 18–52 mm (x̄= 28 mm, SD = 8.3 mm), RW = 2–6 mm (x̄= 3 mm, SD = 0.9 mm), RL = 6–14 mm (x̄= 8 mm, SD = 3.0 mm), AW = 3–8 mm (x̄= 5 mm, SD = 1.3 mm), AL = 9–27 mm (x̄= 14 mm, SD = 4.3 mm), ChW = 3–19 mm (x̄= 7 mm, SD = 3.7 mm), ChL = 16–58 mm (x̄= 28 mm, SD = 12.0 mm), ChD = 2–11 mm (x̄= 4 mm, SD = 2.2 mm); ♀ (n = 7), TL = 63–105 mm (x̄= 78 mm, SD = 21.6 mm), TCL = 29–49 mm (x̄= 36 mm, SD = 10.2 mm), PCL = 22–38 mm (x̄= 28 mm, SD = 8.3 mm), RW = 3–5 mm (x̄= 3 mm, SD = 1.0 mm), RL = 7–11 mm (x̄= 8 mm, SD = 3.0 mm), AW = 4–6 mm (x̄= 5 mm, SD = 1.3 mm), AL = 11–19 mm (x̄= 14 mm, SD = 4.3 mm), ChW = 4–7 mm (x̄= 5.75 mm, SD = 1.1 mm), ChL = 20–25 mm (x̄= 23 mm, SD = 1.9 mm), ChD = 3–4 mm (x̄= 3.5 mm, SD = 0.5 mm). Colouration of live specimens. Colouration of body and appendages mostly ochre, rarely pink or blueish. Body surface slightly marbled, legs paler than body. Ventral side of palm of chelae coloured as dorsal side. Fingers and joints of the dactyls rarely blueish. Deposition of types. Holotype (MZB Cru 4678), allotype (MZB Cru 4679) and seven paratypes (MZB Cru 4680) deposited in The Zoological Museum of Bogor (Museum Zoologicum Bogoriense, Indonesia); 10 paratypes (RMNH. CRUS.D.57252 until RMNH. CRUS.D.57261) are deposited in Naturalis Biodiversity Center, Leiden, the Netherlands; 13 paratypes (Y2017JP/01 until Y2017JP/13) deposited in the Collection of Aquatic Crustaceans at the Department of Zoology and Fisheries, Czech University of Life Sciences Prague, Czech Republic. Systematic position. In regard to energy economy, low food availability and due to the lack of photostimuli, the troglobitic crayfish are characterised by morphological traits such as long and slender claws, reduced eyes, loss of body pigmentation, and long antennae. We found these characteristics also in C. acherontis. A special feeding adaptation is known in one of the North American crayfish, Troglocambarus maclanei, which has long and thickened third maxillipeds provided with dense and usually filtrating setae (Hobbs et al. 1977). The same characteristic was found in C. acherontis. It is obvious that the environmental pressures created by cave habitats influenced the convergent evolution of such species despite their phylogenetic and zoogeographical origin and divergence of epigean congeners. There are various characteristics such as shape of scaphocerite and absence of soft uncalcified patch on outer margin of adult male claws which class the new species to subgenus Cherax; nevertheless, there are some other characteristics such as shape of rostrum, presence of prominent rostral teeth and well developed rostral and postorbital carinae which class the new species to the subgenus Astaconephrops. In accordance to a recent phylogenetic study (Bláha et al. 2016), the validity of the subgenera suggested by Holthuis (1950) is controversial and therefore we do not use any subgenus to describe the new species. In comparison to all New-Guinean species from the genus Cherax, the new species is most similar to C. monticola and differs from this species in the following characters: body and chelae colouration of live individuals, length and width of rostrum, lateral carapace surface behind the cervical groove, longer and narrower chelae, absence of soft uncalcified margin of chela in adult males, and the longer third maxilliped and second pereiopod. Rostrum reaches the end of antennular peduncle in C. monticola while this peduncle more or less terminates behind the acumen in the new species. Rostrum of adult individuals 1.8 to 1.9 times as long as broad at base in C. monticola while it is 2.25 to 2.8 in the new species. Third maxillipeds covered by longer setae and 1.2 times longer in C. acherontis than in C. monticola. Numerous rather widely separated tubercles are present on the lateral carapace behind the cervical groove in C. monticola while the carapace is smooth in the new species. Row of small blunt tubercles posteriorly cervical groove laterally in C. monticola while ventrolaterally in the new species. Chela of adult males 2.3 to 2.7 times as long as broad in C. monticola while 2.3 to 5.3 times in the new species. The fingers are longer in the new species. One or two decalcified spots present on the outer margin of chela of adult males and sometimes also females of C. monticola while always absent in the new species. Base of outer margin of chela without tubercles in C. monticola while small teeth are present in the new species. The legs of second pair reach to the end of the scaphocerite in C. monticola while reaching behind the end of the scaphocerite in the new species. Although we conducted a preliminary study of the phylogenetic position of the new species, the results were ambiguous and require further analysis. Nevertheless, the results showed a close relationship with C. monticola. Etymology. The specific name corresponds to the Latin genitive singular of Acherōn, one of the mystic rivers in the underworld in ancient Greek mythology. Common name. Since the crayfish were captured in the submerged river Yumugima, we propose the name Yumugima Crayfish as a common name for the new species, Cherax acherontis n. sp. Distribution. The karst cave with rich dripstone decoration is located in the New Guinea Highlands, Jayawijaya Regency, Papua Province, GPS coordinates: S 04°01.933’ E 139°00.221’ (Fig 5, 6). There are three entrances to the cave, Hagepma and two others are both named Jugurama. Close to the Hagepma entrance is situated Palimoro village inhabited by one family of local Dani people. The cave was formed by the submerged Yumugima river. The river flows out from the mountains in Baliem Valley as a tributary of Baliem river. There are both fast flowing shallow riffles (depth about 0.5 m) and pools (deeper than 1 m), water temperature was 15.0 °C and pH 7–8. Based on information from local people, the water level increases up to two meters during the rainy season. On the bottom of the river, there are large and small boulders, rock, clay, sand deposits, and sporadically wood debris (Fig 6B) inhabited with a few benthic invertebrates such as mayfly larvae and oligochaetes. No crayfish burrows were recorded. Since there was some garbage observed, such as plastic bags, we assumed that the river flows on the surface somewhere upstream, but local Dani people have no information in this regard.Published as part of Patoka, Jiří, Bláha, Martin & Kouba, Antonín, 2017, Cherax acherontis (Decapoda: Parastacidae), the first cave crayfish from the Southern Hemisphere (Papua Province, Indonesia), pp. 137-144 in Zootaxa 4363 (1) on pages 138-142, DOI: 10.11646/zootaxa.4363.1.7, http://zenodo.org/record/109634
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
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
Intern experience at CH���M Hill, Inc.: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
Transition to turbulence in a qblique shock-wave/boundary-layer interaction at M=15
No full textDirect numerical simulations are carried out for different forcing techniques to trigger transition during the interaction between an oblique shock-wave and a laminar boundary-layer at M = 1.5. Three forcing methods are used: a) forcing of oblique unstable modes, whose shape and behaviour are determined by the local linear stability theory, b) broadband free-stream acoustic disturbances, and c) a cold plasma flow control device. While the oblique-mode breakdown is dominant for low-amplitude forcing, long streaky structures drive the transition process in a high-amplitude disturbance environment. LES are also performed on the experimental setup by the Institute of Theoretical and Applied Mechanics (ITAM) from Novosibirsk State University with cold plasma actuation. As well as the disturbance type, the effect of Reynolds number and forcing amplitude will be investigated
Letter from Cedrick M. Shimo to the Office of Redress Administration, June 4, 1991
No full textA letter from Cedrick M. Shimo to the Office of Redress Administration arguing that John Y. Udaka is entitled to a redress payment.These materials are from box 73 and 74 of the Frank Chin Papers. The Frank Chin Papers contain personal and professional correspondence between Frank Chin and Michi Weglyn relating to particular projects on which either author was working as well as files related to the Day of Remembrance Tribute to Michi Weglyn
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