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1994

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Articles 91 - 120 of 172

Full-Text Articles in Physical Sciences and Mathematics

Die Slowakischen Shauhöhlen Und Ihre Probleme, Ivan Racko Jan 1994

Die Slowakischen Shauhöhlen Und Ihre Probleme, Ivan Racko

International Journal of Speleology

In 1960 the Slovak Caves Administration, which managed twelve Slovak Caves was founded. It was controlled by the Ministry of Culture of the Slovak Socialist Republic and comprised also the Museum of Slovak Karst and the Slovak Speleological Society - a free speleological organisation. In 1981 such an Administration became part of the State Centre for the Protection of Nature. The main task of this centre was obviously the protection of nature in Slovakia but unfortunately many problems remained unsolved. The social movement in November 1989 accelerated the process to solve such problems and the Forum of Professional Workers of …

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Kurzer Bericht Über Die Probleme Des Höhlentourismus In Jugoslawien, France Habe Jan 1994

Kurzer Bericht Über Die Probleme Des Höhlentourismus In Jugoslawien, France Habe

International Journal of Speleology

In the frame of the IUS, the activities concerning the Yugoslav show caves are reported and the most relevant problems are emphasized.

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Problemi Turistici Della Grotta Gigante Nel Carso Triestino, Fabio Forti Jan 1994

Problemi Turistici Della Grotta Gigante Nel Carso Triestino, Fabio Forti

International Journal of Speleology

The paper reports the tourist evolution of the Grotta Gigante (Giant Cave), near Trieste (Italy) during 80 years (1908 - 1989) of its opening to the public. At the beginning it entered in competition with some other local show caves, even much more famous (like Postojna and Stocjan), after the II World War on account of the change of the state boundaries it remained the sole show cave in that part of Italy. Then the Grotta Gigante succeeded, even if slowly, to cope with the changing tourist demands, improving more and more its facilities to follow the increasing tourist flows. …

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La Cueva Del Tesoro - Rincón De La Victoria (Málaga, España), Antonio Guzmán, Fernando Mendoza, José Luís Gutiérrez Jan 1994

La Cueva Del Tesoro - Rincón De La Victoria (Málaga, España), Antonio Guzmán, Fernando Mendoza, José Luís Gutiérrez

International Journal of Speleology

«La Cueva del Tesoro» (The Treasure Cave) is located on the East, 10 kilometres from the city of Málaga, in a coastal promontory called «El Cantal» (a small steep), which is situated in the municipality of Rincón de la Victoria. The composition of land in this zone «El Cantal» is made up of limestone and there are many caves which are located within a radius of 2 kilometres, although some of them have already disappeared: la Cueva del Tesoro, la cueva del Hoyo de la Mina, Cuevas de Navarro, Cuevas de la Cantera, Cueva de los Molinos, Cueva de la …

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Problems Of Show Caves In Bohemia And Moravia, Milka Dusan Jan 1994

Problems Of Show Caves In Bohemia And Moravia, Milka Dusan

International Journal of Speleology

In the last years the show caves in Bohemia and Moravia were administrated by the Ministry of Culture with the status of a state assisted organization. That means that they were considered as those organizations not self-sufficient, without connections with tourism. Presently, the management of the show caves in Bohemia and Moravia is at a crossroad: to remain under the administration of the Ministry of Culture or move under the newly formed Ministry of Environment. In the latter case the cave management should change into a business organization similar to a private body. We believe that these problems can be …

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Life Cycle And Population Ecology Of The Cave Cricket Dolichopoda Geniculata (Costa) From Valmarino Cave (Central Italy), Glanmaria Carchini, Mauro Rampini, Valerio Sbordoni Jan 1994

Life Cycle And Population Ecology Of The Cave Cricket Dolichopoda Geniculata (Costa) From Valmarino Cave (Central Italy), Glanmaria Carchini, Mauro Rampini, Valerio Sbordoni

International Journal of Speleology

A D. geniculata population inhabiting a natural cave at low altitude near seashore was followed during two years. The population size, distribution in three age classes, spatial distribution, feeding habits were recorded. The life-cycle was found semivoltine, with overlaps between next choorts in each age class. A comparison to other Dolichopoda showed that the population of Valmarino cave is one of the best adapted to cave life, and this may be related with both historical and present geographical and ecological conditions of the cave.

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A New Species Of Troglobius (Collembola, Paronellidae) From Brazil, José G. Palacios-Vargas, Douglas Zeppelini Jan 1994

A New Species Of Troglobius (Collembola, Paronellidae) From Brazil, José G. Palacios-Vargas, Douglas Zeppelini

International Journal of Speleology

Troglobius brasiliensis n. sp. from two caves of Brazil is described and illustrated.

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Some Remarks On The Genus Microcharon Karaman In Greece, And Description Of M. Agripensis N. Sp. (Crustacea, Isopoda, Microparasellidae), Diana M. P. Galassi, Paola De Laurentiis, Giuseppe L. Pesce Jan 1994

Some Remarks On The Genus Microcharon Karaman In Greece, And Description Of M. Agripensis N. Sp. (Crustacea, Isopoda, Microparasellidae), Diana M. P. Galassi, Paola De Laurentiis, Giuseppe L. Pesce

International Journal of Speleology

Several samples of microparasellid isopods of the genus Microcharon Karaman were obtained in groundwater habitats of Greece. Four species are identified, and taxonomical and zoogeographical remarks on some rare or poorly known taxa are made. One species, herein described as Microcharon agripensis n. sp., is new to Science. M. latus prespensis Karaman, 1954, on account of the different morphology of the first and second male pleopods, and its partially overlapping distribution, in respect to M. latus Karaman, 1934, is definitively raised at specific rank. Supplementary descriptions and illustrations are reported for incompletely described species such as M. latus, M. …

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Sinogammarus Troglodytes N. Gen. N. Sp. A New Troglobiont Gammarid From China (Crustacea Amphipoda), Gordon Karaman, Sandro Ruffo Jan 1994

Sinogammarus Troglodytes N. Gen. N. Sp. A New Troglobiont Gammarid From China (Crustacea Amphipoda), Gordon Karaman, Sandro Ruffo

International Journal of Speleology

The authors describe Sinogammarus troglodytes n. gen. n. sp. found in two caves in Sichuan province in China, the first Chinese troglobite of the Gammaridae family (sensu Barnard & Barnard, 1983; 1990). The new genus is discussed and compared with the microphthalmous and anophthalmous genera of Gammaridae, heretofore known in the subterranean waters of the Balkan peninsula and the Caucasus region. The genus Sinogammarus is most closely allied to Gammarus Fabricius and Anopogammarus Derzhavin.

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Towards Regressive Evolution: The Periodic Colour Change Behaviour Of A Troglophilic Fish Nemacheilus Evezardi (Day), Rohit K. Pradhan, Jayant Biswas Jan 1994

Towards Regressive Evolution: The Periodic Colour Change Behaviour Of A Troglophilic Fish Nemacheilus Evezardi (Day), Rohit K. Pradhan, Jayant Biswas

International Journal of Speleology

Present study is an attempt to know the existence of colour change physiology of the cave fish Nemacheilus evezardi (Day) along a circadian time scale. Though, due to subterranean mode of life, practically this function has no survival value. The study has been conducted simultaneously in two different photoperiodic conditions (LD 00: 24 and LD 12:12 hr). The variation in different states of chromatophore has been computed with respect to different time points of the day. Results suggest that the phenomenon is lying completely disturbed in its in situ conditions. Interestingly, circadian rhythm in all the types of chromatophores were …

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Die Saalfelder Feengrotten: Ein Schaubergwerk Mit Höhlencharkter, Bernd Lochner Jan 1994

Die Saalfelder Feengrotten: Ein Schaubergwerk Mit Höhlencharkter, Bernd Lochner

International Journal of Speleology

The well known “Saalfelder Feengrotten” originated from an old aluminium mine called “Jeremiasglück”. The mine has been working from 1943 to 1945; the oldest formations have an age of about 350 years. Such formations were formed by an oxidation process which explains the rather fast growth rate in comparison to the growth rate of calcite formations. In the “Feengrotten” rare minerals can be found: the most common is a soft unstable compound, the diadochite (iron(III) phosphate). The control of the lampenflora is rather complicate and it is obtained with some compounds normally used in caves. The “Feengrotten” are visited yearly …

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A New Jujiroa From Sichuan, China (Coleoptera, Carabidae), Augusto Vigna Taglianti Jan 1994

A New Jujiroa From Sichuan, China (Coleoptera, Carabidae), Augusto Vigna Taglianti

International Journal of Speleology

Jujiroa iolandae n.sp. is described from Liujia Cave in China (Sichuan, near Huaying, between Chongqing and Nanchong). Strongly depigmented, with very reduced eyes and markedly elongated appendages, it is well distinguishable from Taiwanese and Japanese species, and from the two previously known species from China. One of these, J. suensoni from Shangxi, is quite different (its doubtful taxonomic position is perhaps to be referred to another genus or lineage); the other, J. rufescens from Jiangxi (Fujian), is more related to the new species, that differs by the longer and more sinuate pronotum, with fore and hind angles much more produced, …

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Management Of Some Unusual Features In The Show Caves Of The United States, Jeanne Gurnee Jan 1994

Management Of Some Unusual Features In The Show Caves Of The United States, Jeanne Gurnee

International Journal of Speleology

Protection of the unusual features in some of the 200 show caves of the U.S. have required innovative management. The sea caves of both the east and west coasts present the need for special preservation methods. Throughout the nation sometimes glass enclosures, vehicles and boats are used to separate visitors from sensitive cave features. Lighting and cleaning techniques have been studied and altered to discourage growth of algae. Some show caves are protected by double glass entrance and exit doors. Many caves, particularly on public lands, are closed during the hibernation period of endangered bats. In a number of caves, …

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Les Grottes Aménagées Et L'Union Internationale De Spéléologie (1965-1990), Hubert Trimmel Jan 1994

Les Grottes Aménagées Et L'Union Internationale De Spéléologie (1965-1990), Hubert Trimmel

International Journal of Speleology

The initiatives of the International Union of Speleology concerning the show caves, approved during various International Congresses of Speleology are here reported. Among other things, an attempt of having a list of show caves is also recalled but only recently such an attempt produced successfully a document. An example of it is also given.

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La Grotta Del Vento: Una Realta'nel Contesto Del Parco Naturale Delle Alpi Apuane, Vittorio Verole-Bozzello Jan 1994

La Grotta Del Vento: Una Realta'nel Contesto Del Parco Naturale Delle Alpi Apuane, Vittorio Verole-Bozzello

International Journal of Speleology

After a short history of the explorations of the cave its development as a show cave is here reported with details. Such a development was carried out in order to preserve not only the physical integrity of the cave environment but also to keep the tourists’ approach as natural as possible. In co-operation with the Medical Faculty of the Pisa University the cave is also used since many years for an interesting and quite successful experiment for the treatment of bronchial asthma.

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Faunistic Study In The Karst Complex Of Frasassi (Genga, Italy), Roberto Bertolani, Gian Carlo Manicardi, Lorena Rebecchi Jan 1994

Faunistic Study In The Karst Complex Of Frasassi (Genga, Italy), Roberto Bertolani, Gian Carlo Manicardi, Lorena Rebecchi

International Journal of Speleology

The cave fauna of the karst complex of Frasassi (Genga. Ancona, Italy), which includes a tourist attraction, was surveyed to provide detailed information on the hypogean animal populations. Indeed, for this area, only sporadic and limited studies are known in the literature to date. The bat populations, recently analyzed by Bassi and Fabbri (1986-87), were excluded from our study. Ten collection campaigns were carried out in 12 different caves, including the tourist site, over a span of two years. Three caves were considered in all the collections and the others only on one or two occasions. The animals were captured …

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Descrizione Morfologica E Stima Dell'impatto Ambientale Derivante Dall'apertura Al Pubblico Delle Grotte Di "Is Zuddas" Presso Santadi (Nuoro, Sardegna, Italia), Roberto Curreli, Nicolino Diana, Antonello Floris, Antonello Sulas Jan 1994

Descrizione Morfologica E Stima Dell'impatto Ambientale Derivante Dall'apertura Al Pubblico Delle Grotte Di "Is Zuddas" Presso Santadi (Nuoro, Sardegna, Italia), Roberto Curreli, Nicolino Diana, Antonello Floris, Antonello Sulas

International Journal of Speleology

After a short history of the discovery of the caves of “Is Zuddas” a geological description of the region and the geomorphological evolution of the cave are recorded. The results of a preliminary climatological research are reported and a rough evaluation of the visitors capacity is also given.

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Proposition Pour Une Étude Micro-Climatique En Zones Souterraines Profondes, Jacques Choppy, Arrigo A. Cigna Jan 1994

Proposition Pour Une Étude Micro-Climatique En Zones Souterraines Profondes, Jacques Choppy, Arrigo A. Cigna

International Journal of Speleology

Deep underground zones of karst systems are practically isolated from the outside influence and their climatological characteristics are scarcely known. To improve the knowledge of the karst areas it would be therefore rather useful to obtain energy balances for different environmental situations in order to evaluate both the deep climatological phenomena and the outside influence.

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Activity Of The Scientific Commission Of "Grotta Grande Del Vento" (Genga, Ancona, Central Italy), Mario Bertolani, Arrigo A. Cigna Jan 1994

Activity Of The Scientific Commission Of "Grotta Grande Del Vento" (Genga, Ancona, Central Italy), Mario Bertolani, Arrigo A. Cigna

International Journal of Speleology

The Grotta Grande del Vento (the Great Wind Cave) was discovered in 1971. An administrative body (the “Consorzio Frasassi”) under the control of some local authorities took care of its development and the cave was opened to tourists in 1974. A Scientific Commission formed by some experts (choosen by the Consorzio Frasassi) of different disciplines was established in 1975. During these 15 years the Commission acted as an advisory committee for the Consorzio in order to guarantee the protection of the cave environment. In particular the Commission set up a monitoring network of the most important environmental parameters (air and …

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A Case Study Of Health Risk Communication: What The Public Wants And What It Gets, Jeannette M. Trauth Jan 1994

A Case Study Of Health Risk Communication: What The Public Wants And What It Gets, Jeannette M. Trauth

RISK: Health, Safety & Environment (1990-2002)

Dr. Trauth presents a content analysis of 40 years of coverage of a major local source of air pollution by a Pittsburgh newspaper. She also summarizes the results of a survey conducted to determine the extent to which citizens of most likely affected communities, e.g., understand health risks and desire further information.

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Table Of Contents Volume Five, Number One, Winter 1994, Risk Editorial Board Jan 1994

Table Of Contents Volume Five, Number One, Winter 1994, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)

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Storm Dominated Channel Sequences On A Shallow Marine Shelf: Morrowan Of Northwest Arkansas, Kimberley R. Jones, Doy L. Zachry Jan 1994

Storm Dominated Channel Sequences On A Shallow Marine Shelf: Morrowan Of Northwest Arkansas, Kimberley R. Jones, Doy L. Zachry

Journal of the Arkansas Academy of Science

The Brentwood Member of the Bloyd Formation (Morrowan, Pennsylvanian) in northwestern Arkansas contains stratigraphic sequences deposted by tropical storms in middle shelf environments. The deposits are confined to shallow channels incised by strong unidirectional currents into an interval of shale deposited during fair weather conditions. Complete storm sequences reflect initial bottom currents of high competency that declined through time and were succeeded by wave generated oscillatory activity. The storm succession consists of an erosion surface followed by a basal pebble conglomerate, massive grainstone and packstone, whole-fossil wackestone, hummocky cross-strata and a swell lag of platy crinoidcalyxes. As storm activity ceased, …

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Computational Fluid Dynamics In Small Airway Models Of The Human Lung, G. Burnside, J. R. Hammersley, Rama N. Reddy, B. Catlin Jan 1994

Computational Fluid Dynamics In Small Airway Models Of The Human Lung, G. Burnside, J. R. Hammersley, Rama N. Reddy, B. Catlin

Journal of the Arkansas Academy of Science

The promise of gene replacement therapy for cystic fibrosis, the administration of drugs via inhalation therapy, and die deposition location of man-made airborne particulates all involve a more complete understanding of the fluid dynamics in the human lung. Flow in the larger airways may be measured through life-sized models directly, but the airways in the peripheral lung are too small and the flows are too complex to be studied in this manner. Computational models can be developed which will accurately represent both the geometric nature of the central airways and the fluid dynamics with in them. Two-dimensional and three-dimensional models …

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Visualizing Electrostatic Phenomena Using Mathematica, Eric Mayes Jan 1994

Visualizing Electrostatic Phenomena Using Mathematica, Eric Mayes

Journal of the Arkansas Academy of Science

A set of packages for visualizing electrostatic phenomena was developed using Mathematica as a programming language. These packages allow users to plot potential fields, equipotential lines, 2-D and 3-D vector fields in order to gain a visual understanding of electrostatic charges. They would be useful in accompanying undergraduate physics labs pertaining to electrostatics, as they would enable students to connect experiment with mathematics through open-ended visual exploration

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Aquatic Macrophytes Of Two Small Northwest Arkansas Reservoirs, John J. Sullivan, Arthur V. Brown Jan 1994

Aquatic Macrophytes Of Two Small Northwest Arkansas Reservoirs, John J. Sullivan, Arthur V. Brown

Journal of the Arkansas Academy of Science

Lake Fayetteville and Lake Wedington are small reservoirs of about the same size and age that are located in northwestern Arkansas. We collected macrophytes from eleven transects around each reservoir in the autumn of 1993. Justicia (waterwillow), Typha (cat-tail), Scirpus (bulrush), Potamogeton (pondweed), and Zannichellia (horned pondweed) occur in both reservoirs. Justicia occurs most commonly in both reservoirs. The macrophytes of Lake Wedington are organized in a characteristic zonation pattern with bands from shore toward open water of emergent, floating-leaved, then submersed macrophytes. Macrophyte zonation was not as evident in Lake Fayetteville because of the low occurrence of floating leaved …

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Monte Carlo Simulation Of The Scintillating Optical Fiber Calorimeter (Sofcal), Zibin Yang, Russell Gillum, Donald C. Wold Jan 1994

Monte Carlo Simulation Of The Scintillating Optical Fiber Calorimeter (Sofcal), Zibin Yang, Russell Gillum, Donald C. Wold

Journal of the Arkansas Academy of Science

A scintillating optical fiber calorimeter (SOFCAL) is being developed by NASA/Marshall Space Flight Center for use in balloon-borne emulsion chambers to study the spectrum of high-energy cosmic rays and gamma rays. SOFCAL will not saturate for long exposures, and the detector will be helpful for the study of primary cosmic-ray nuclei energies from 100 GeV to 1,000 TeV. For a given incident particle and energy, computer simulations of electromagnetic cascades allow computation of energy deposited in different regions of the calorimeter. For these initial simulations, a 5-cm x 5-cm x 7-cm calorimeter was used. Each subsection contained a 0.4-cm thick …

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Using The Cern Program-Library Graphics And Interactive Data Display, Morgan T. Burks, Wilson H. Howe, Christine A. Byrd, Wilfred J. Braithwaite Jan 1994

Using The Cern Program-Library Graphics And Interactive Data Display, Morgan T. Burks, Wilson H. Howe, Christine A. Byrd, Wilfred J. Braithwaite

Journal of the Arkansas Academy of Science

Small scale Monte Carlo programming is growing rapidly due to the ease with which complex problems may be formulated by any programmer. These programmers may choose to exploit graphics and interactive displays available in the program library developed and maintained by CERN (the Center for European Nuclear Research). This paper outlines the use of graphics and interactive data display features of the CERN program library, developed for visualizing simulated data events in particle detectors. One example uses GEANT, CERN's Monte Carlo modeling program, to simulate 300 MeV/c protons incident on a silicon slab. Display packages for GEANT are available both …

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Reaction Of Titanocene Dichloride With Acetylenedicarboxylate, Tanya L. Hagler, Mark Draganjac, Paul M. Nave, J. Ed Bennett, Farooq Kahn, Robert Engelken, Gerard Williams, Chris Poole, Kwok Fai Yu Jan 1994

Reaction Of Titanocene Dichloride With Acetylenedicarboxylate, Tanya L. Hagler, Mark Draganjac, Paul M. Nave, J. Ed Bennett, Farooq Kahn, Robert Engelken, Gerard Williams, Chris Poole, Kwok Fai Yu

Journal of the Arkansas Academy of Science

The reaction of Cp2TiCl2 with either the mono- or dipotassium salt of acetylenedicarboxylic acid (ADC) gives high yields of an insoluble orange product. The insoluble compound shows potential semiconductor behavior, as evidenced by an apparent bandgap in the orange region of the visible spectrum. Under N2 ,the compound decomposes at 238° C, eventually losing approximately 46% total mass up to 1350° C. The exothermic decomposition in air, beginning at 235° C, results in the formation of titanium oxides.

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Analysis Of Ammunition By X-Ray Fluorescence, Michael W. Rapp, Teddy L. Townsend Jan 1994

Analysis Of Ammunition By X-Ray Fluorescence, Michael W. Rapp, Teddy L. Townsend

Journal of the Arkansas Academy of Science

Nondestructive analysis of lead shotgun pellets by X-ray fluorescence (XRF) shows considerable promise in assignment of the identity of the ammunition source. X-ray fluorescence spectra of various shotgun pellets and of standard alloys were obtained using an energy-dispersive instrument and an Am-241 source. The correlation obtained between the precent antimony in the standard alloys and the intensity of the Ka fluorescence peak from antimony was excellent. Peak areas from antimony in shotgun pellets were measured and compared to calibration plots from the standard alloys. The method was capable of distinguishing among lead-based alloys, such as ammunition, with antimony content as …

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Thermal Decomposition Studies Of Selected Transition Metal Polysulfide Complexes. Ii. Effect Of Atmosphere On Decomposition, Benjamin Rougeau, Mark Draganjac Jan 1994

Thermal Decomposition Studies Of Selected Transition Metal Polysulfide Complexes. Ii. Effect Of Atmosphere On Decomposition, Benjamin Rougeau, Mark Draganjac

Journal of the Arkansas Academy of Science

Initial studies involved the thermal decomposition profile of five polysulfide complexes in air up to 550 °C. Since our first report to the Academy in 1990, we have obtained the capability to run samples up to 1500°C under various gases. Thermal Gravimetric Analysis (TGA) and Differential Thermal Analysis (DTA)of a series of transition metal polysulfide complexes are presented. Compounds analyzed included Cp2TiS5 ,MoS9 2",MoOS8 2", Zn(S x ) 2", Cd(S x ) 2-, Fe2S122 - and NiS82.

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