80 research outputs found
Flaked Stone Discs of the Neolithic and Chalcolithic Periods in the Southern Levant
No full textThis paper presents a detailed study of a unique groundstone (henceforth-stone) tool — the flaked stone disc. The study presents the result of an attribute analysis conducted on 703 flaked discs found in stratified contexts during excavations and as surface finds, all from sites in northern Israel. The discs are described in detail and some provisional suggestions regarding their function are discussed.Cette étude détaillée présente un outil de pierre particulier : le disque retouché. L’analyse porte sur 703 disques retouchés, provenant aussi bien de contextes stratifiés que de ramassages de surface, tous les sites étant situés dans le nord d’Israël. Ces artefacts sont décrits en détail et des suggestions relatives à leur fonction sont discutées.Rosenberg Danny, Assaf Ali Abou, Getzov Nimrod, Gopher Avi. Flaked Stone Discs of the Neolithic and Chalcolithic Periods in the Southern Levant. In: Paléorient, 2008, vol. 34, n°2. pp. 137-151
Evaluation of multimodal feedback effects on improving rowing competencies
No full textThis study focused on the selection and preliminary evaluation of different types of modal and information feedback in virtual environment to facilitate acquisition and transfer of a complex motor-cognitive skill of rowing. Specifically, we addressed the effectiveness of immediate information feedback provided visually as compared to sensory haptic feedback on the improvement in hands kinematics and changes in cognitive load during the course of learning the basic rowing technique. Several pilot experiments described in this report lead to the evaluation and optimization of the training protocol, to enhance facilitatory effects of adding visual and haptic feedback during training
Geomys bursaries or pocket gopher of Kansas
No full textCitation: Pape, Charles Wesley. Geomys bursaries or pocket gopher of Kansas. Senior thesis, Kansas State Agricultural College, 1895.Morse Department of Special CollectionsIntroduction: In the preparation of this little work the author has endeavored to set forth, in a clear and concise manner, his experiences and observations of the Geomys bursaries. As to its usefulness, the author sees none except in special soils as described under that head. The gopher’s destructiveness, however by far exceeds that which generally calculated by the average tiller of the soil. This is principally due to the gopher’s work in so much underground that much of its depredations are hidden from the eyes of man. In giving the amounts, as paid in bounties in certain states, the author gives thanks to the Agricultural Department at Washington D.C. for the information given in bulletins #4 of the division of Ornithology and mammalogy for 93 and the authors would advise everyone interested in the subject, to consult the above bulletin and see the vast amounts that have been spent in contesting against the gopher. The author’s experience in killing the gopher extends over a period of eight years, during which time all the methods herein described have been tried and his success and opinions of each method are given under each respective method
Le « gopher » de l’EBSI, un an plus tard
No full textLe réseau Internet constitue un puissant outil de communication. Il rejoint aujourd’hui quelques dizaines de millions d’usagers et dispose d’une quantité astronomique d’information. Cet article traite de la diffusion dans Internet à travers la réalisation d’un « gopher » à l’École de bibliothéconomie et des sciences de l’information (EBSI) de l’Université de Montréal. Il décrit de quelle façon, au cours de sa première année de fonctionnement, ce « gopher » a contribué au rayonnement de l’École et a permis aux membres de l’EBSI et à tous les usagers d’Internet de s’orienter aisément dans ce réseau aux innombrables ressources.Internet is a powerful communication resource. Millions of people now have access to a phenomenal quantity of information. In this article, the author describes the gopher used at the École de bibliothéconomie et des sciences de l’information (EBSI) of the Université de Montréal. During the first year of its operation, the gopher has helped the school become better known and helped the students and staff of the EBSI, as well as other users of Internet, navigate throughout the resources.La red Internet es un instrumento poderoso de comunicación. Contiene una cantidad astronómica de información que esta utilizada por decenas de millones de usuarios. Este artículo trata de la difusión a través de Internet de la realización de un "gopher" en la Escuela de Biblioteconomía y de las Ciencias de la Información (EBSI) de la Universidad de Montreal. Describe de que manera, en el curso de su primer año de funcionamiento, este "gopher" ha contribuido a la difusión de la Escuela y ha permitido a los miembros de la EBSI y a todos los usuarios de Internet de orientarse facilmente en esta red de innumerables recursos
The Role of Gopher Tortoise Burrows (Gopherus polyphemus) in Shaping Herpetofaunal Diversity in the Sandhills of Southeast Georgia
No full textAuthor\u27s abstract: Gopher Tortoises (Gopherus polyphemus) are known to have large numbers of invertebrate and vertebrate species associated with their burrows. I compared herpetofaunal species diversity and richness at Gopher Tortoise burrows and random points not near burrows on a sandhill in Southeast Georgia. I also compared habitat structure between burrows and random arrays. Trapping took place from March 1, 2007 to August 30, 2007. Species richness for all months combined was significantly higher at Gopher Tortoise burrows than random arrays (Random = 3.60 ± 0.43, Burrow = 5.20 ± 0.57). Species diversity was not significantly different between burrow and random arrays; however, there was a trend showing higher diversity at burrows (Random = 0.67 ± 0.08, Burrow = 0.78 ± 0.06). Species diversity and richness were analyzed separately for each month. Species diversity and richness did not differ between months (March August) or between arrays. Percent canopy cover and plant species richness were significantly lower at Gopher Tortoise burrows, and there was a trend towards more ground cover at burrows as well. The results of this study show that species may take refuge in the burrow of the Gopher Tortoise, especially when temperatures are relatively low. This study has provided some evidence to support the status of the Gopher Tortoise as a keystone species in sandhill habitats
The University of West Florida campus ecosystem study: gopher tortoise and longleaf pine populations in an urban interface
No full textCollege/university campuses comprise a distinct type of urban interface, with their generally expansive spatial pattern of alternating permanent structures, parking lots, and green spaces. The campus of the University of West Florida (UWF) in Pensacola, Florida, was constructed among second-growth longleaf pine stands recovering from extensive logging in the western-most extent of the Panhandle, with the original campus design deliberately carried out to maintain original contours and minimize tree removal. The extended campus includes a fire-excluded, longleaf-dominated landscape with active gopher tortoise populations confined to power line right-of-ways. This study (1) examined burrowing effects on soils and plant communities, and (2) estimated the age of longleaf pine stems (trees) around campus to assess the influence of human activity on population structure. Gopher tortoise sampling was confined to three discrete areas (types) for each burrow: apron (redistributed soil outside burrow), burrow (soil above burrowed cavity), and matrix (unaltered surrounding area).Within one 0.1 m² quadrat/ sample type for each of 16 burrows, density was determined for all vascular species; mineral soil was taken to a 5-cm depth. Airdried soil was analyzed for pH, organic matter (OM), cation exchange capacity (CEC), extractable macro- and micronutrients, and extractable aluminum. All longleaf stems >2.5 cm diameter at breast height (DBH) were measured for DBH. Stem age was estimated with an allometric equation. Plant density was reduced by burrowing 7-fold on apron versus burrow and matrix sites, which did not vary between each other. Soil variables did not vary between burrow and matrix samples. Apron soils were significantly lower in pH, OM, CEC, and cations. Soil NO₃⁻ was ~3-fold higher in apron soils. Age structure of longleaf pine on campus revealed that nearly 2/3 of all stems are between 75 and 125 years old, consistent with the cessation of extensive logging of longleaf in this region.Journal ArticleAuthor's accepted manuscrip
A study of village virus in gopher prairie of Sinclair Lewis' main street
No full textThe main concern of the analysis is the Village Virus that runs down in a small Mid-West town called Gopher Prairie, reflected through its inhabitants, in the second period of the twentieth century. Actually, it was Sinclair Lewis, the author, himself who named ?the decease as village virus, and as a matter of fact, he once intended to entitle the novel The Village Virus instead of Main Street. The virus is said to be a kind of deadly virus that dehumanises living people into living dead persons whose life are monotonous, boring, and dull. However, the center of analysis will be concentrated on revealing what actually this Village Virus can be, and it will be analysed through the causes and effects of this Village Virus that lives within the life of the society of Gopher Prairie. Then, in order to make a clear description on the virus, the writer will also try to find out how the process of infecting a new person to become a living dead person. Next, the writer is going to use Carol Kennicott, the main female character, as the main proof of the living virus since previousIy she has her life thriving and after she gets infected, her life becomes as dull as the life of the rest inhabitants of Gopher Prairie. In order to accomplish these, the writer uses library research to find any data or criticisms related to the novel and to the topic; furthermore, the writer is going to utilize best literary theory, namely characterization, so that the reader would be able to see clearly what make such society like Gopher Prairie?s get so infected. Besides, there is the theory of conflict that wil
Gopher antenni: Uudentyyppinen maaperätutkan antenni
No full textCurrently, ground penetrating radar (GPR) antennas for ground-coupled setups are inefficient. They use resistors and/or dissipative material to improve the impedance bandwidth and thus achieve optimal pulse shape. These antennas are mostly bowtie dipoles and have an omnidirectional pattern, although the casing and the electrical properties of the ground modify the pattern. The center frequency of the antennas in free space is often 500 MHz, and the required bandwidth is wide: the spectrum ratio is from 1:2 to 1:10 at a −10 dB limit. The phase center must remain stable over the whole bandwidth.
The main objective of this dissertation is to develop an antenna that is more efficient and has good directivity. The concept of a patch antenna with a dual resonant structure was used as a basis. To achieve this goal, a feed antenna with three resonant frequencies was used. The novel point in the design is the second resonant frequency (not the first, as is typical) of the feed that is matched to the line impedance by a coupled dual resonant parasitic patch structure. Around the center frequency, the matching is good, and there are no dissipative materials. Therefore, the antenna is efficient. The radiated spectrum expands well beyond the matched impedance area and thus is not efficient in that part of the radiated spectrum, but it provides a Gaussian spectrum which is preferred by GPR users. The patch antenna design provides an inherent directivity, often 9 dBi, and combining the feed improves the directivity further. For practical reasons, this antenna type was given the name the "Gopher antenna".
A reasonably priced GPR without an antenna was provided by one manufacturer. This was partly modified by the author to fit better the Gopher antenna so that the tests could be performed. Measurements were done in settings where there were known objects underground, and on a lake where the lake bottom was visible. The received data needed extensive processing. The sophisticated free software for the processing did not read the files from the system, thus a simple processing software was designed by the author. This had the advantage of enabling the testing of various pre- and postprocessing methods, and the trace integration method with optional deconvolution and cross-correlation methods were found to be useful with this data.
The antenna was implemented, and the measured results validate the concept. The lake profiles are quite clear, and the ground profiles show reflections from known objects in the expected size range. As there was no standard way of describing the antenna radiation in the ground, I propose that the highest electric field magnitude is stored in each FDTD pixel during the simulation. This provides a useful graphic with which to compare antenna patterns. The pattern was also tested in a case study by tilting the antenna. With this efficient and directive antenna, the GPR is expected to see deeper.Nykyisten maaperätutkan antennien hyötysuhde on useimmiten huono, koska niissä käytetään vastuksia hyvänmuotoisen pulssin saavuttamiseksi. Niissä käytetään tavallisimmin rusettityyppistä dipoliantennia ja niiden suuntakuvio on ympärisäteilevä, joskin antennin kotelo ja maaperä vaikuttavat suunta¬kuvioon. Näiden antennien keskitaajuus on 500 MHz:n luokkaa vapaassa tilassa ja niiltä vaaditaan hyvin leveää taajuuskaistaa: taajuussuhde 1:2 ja 1:10 välillä 10 dB rajalla. Vaihekeskipisteen tulee olla vakaa koko taajuusalueella.
Tämän väitöskirjan tavoitteena on kehittää antenni, jolla on hyvä hyötysuhde ja joka on suuntaava. Kehitystyö on tehty mikroliuska-antennitekniikan pohjalta käyttäen kaksoisresonanssipiiriä. Syöttöantennissa on kolme resonanssia. Tässä työssä on uutta se, että käytetään syöttöantennin toista resonanssia (ei siis alinta resonanssia) kytketyn rinnalla värähtelevän mikroliuska-antennin kanssa. Antennin keskitaajuudella impedanssisovitus on hyvä. Koska antennirakenteessa ei ole häviöllisiä materiaaleja, antennin hyötysuhde on hyvä. Antennin säteilevä spektri on paljon laajempi kuin sovitetun impedanssispektrin alue, joten koko spektrin alueella hyötysuhde ei ole yhtä hyvä, mutta antenni tuottaa Gaussin käyrän mukaisen spektrin, jota maaperätutkan käyttäjät suosivat. Mikroliuska-antenni on luonnostaan suuntaava, usein 9 dBi, ja tämä yhdessä syöttöantennin ja toisen antennin kanssa vielä parantaa sitä. Käytännöllisistä syistä antennille annettiin lyhyt nimi: Gopher (taskurotta) -antenni.
Nykyiset maaperätutkat ovat kalliita laitteita "mustassa laatikossa". Yksi valmistaja antoi kuitenkin käyttöön kohtuuhintaisen maaperätutkan ilman antennia. Kirjoittaja muokkasi sitä hieman uuden antennin toiminnan mittauksia varten. Mittauksia tehtiin paikoissa, joissa on tunnettuja kohteita maan alla, ja järvessä, jonka pohja näkyi. Mittausdataa täytyy jälkikäsitellä paljon. Koska käyttöön ei löytynyt sopivaa valmisohjelmisto¬kokonaisuutta, kirjoittaja teki omaa koodia. Siitä oli se hyöty, että kirjoittaja saattoi kokeilla uusia vaihtoehtoja ja mitatun datan integrointi osoittautui hyväksi ristikorrelaation kanssa.
Tässä työssä antenni on toteutettu ja se on mitattu toiminnan varmistamiseksi. Järvestä saadut mittausprofiilit ovat selkeitä ja maasta mitatut profiilit näyttävät heijastuksia tunnetuista kohteista. Toistaiseksi ei ole yleisesti sovittua tapaa esittää antennin säteilyä maassa antennin lähellä, joten tein ehdotuksen: simulaatiossa jokaisessa ruudussa tallennetaan suurin sähkökentän arvo simulaation aikana. Sen pohjalta tehty kuva antaa mahdollisuuden verrata antennien säteilyä maassa. Säteilyn suuntaavuutta testattiin myös kallistamalla antennia maan suhteen. Koska tehty antenni on tehokas ja suuntaava, sen odotetaan näkevän syvemmälle kuin nykyiset maaperätutkan antennit
Cataloguing the internet: CATRIONA feasibility study : report to the British Library Research & Development Department
No full textThe idea of a distributed catalogue of Internet resources integrated with standard Z39.50 library system OPAC interfaces (and hence with retrieval of information on hard copy resources) is already practical at a basic level. Geac's Z39.50 GUI OPAC client. GeoPac, can search remote Z39.50 OPACs, retrieve USMARC records with URLs in 856$u, respond by loading a viewer like Mosaic or Netscape, and utilise it to retrieve and display the remotely held electronic resources on the local workstation. A range of Z39.50 OPACs can be searched server by server, making a basic-level distributed catalogue of Internet resources feasible. At least one other Z39.50 client, Dynix Horizon is close to having similar capabilities.
Significant further development and investigation is nevertheless required. A proposed demonstrator project - based around Scottish University Libraries and the BUBL Subject Tree initiative, but sufficiently 'open' to encompass other sites and approaches - is both feasible and essential, and would provide a focus for Z39.50 developments in the UK.
Z39.50 clients and associated Z39.50 OPACs describing resources could become preferred network navigation tools with other specific NIDR client types (WWW, gopher, WAIS, others) loaded as required. Library involvement is essential to sustainable Internet cataloguing initiatives
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