729 research outputs found
The Archaeology Of Gua Tupak From 1,190 B.P. To 170 B.P. In Bau, Sarawak
No full textIn November and December 2007, an archaeological survey was conducted
by the author and a research team from the Centre for Global Archaeological
Research, Universiti Sains Malaysia, Penang with the cooperation of the Sarawak
Museum Department, Kuching in the limestone caves of the Bau area, southwest
Sarawak in order to search for a site for the author’s Master of Arts (MA) study. The
result of the survey determined Gua Tupak to be a highly potential site and
consequently, excavations were carried out at the site in February and March 2008.
The excavations at Gua Tupak yielded valuable archaeological data that could aid in
providing information on the prehistory of the site and the Bau area. The
archaeological data include various types of artefacts such as shell remains, animal
bones, ceramic sherds and stone artefacts. In addition, charcoal and shell samples
were collected for radiocarbon dating, soil samples were collected for palynological
analysis and soil profiles of the excavated trenches were recorded. Results of the
analyses of artefacts and interpretations of the archaeological data recovered from
Gua Tupak suggest that the site was used as a temporary habitation site or shelter
with two main phases of occupation; the Early Phase with a radiocarbon date of
around 1,190 ± 40 B.P., and the Late Phase with radiocarbon dates ranging from 270
± 50 B.P. to 170 ± 40 B.P
Agriculture facilitated permanent human occupation of the Tibetan Plateau after 3600 B.P.
No full textOur understanding of when and how humans adapted to living on the Tibetan Plateau at altitudes above 2000 to 3000 meters has been constrained by a paucity of archaeological data. Here we report data sets from the northeastern Tibetan Plateau indicating that the first villages were established only by 5200 calendar years before the present (cal yr B.P.). Using these data, we tested the hypothesis that a novel agropastoral economy facilitated year-round living at higher altitudes since 3600 cal yr B.P. This successful subsistence strategy facilitated the adaptation of farmers-herders to the challenges of global temperature decline during the late Holocene
Predictive mechanical model for fracture stimulation in an enhanced geothermal system (EGS) context
No full textAccepted Author ManuscriptReservoir EngineeringApplied Geolog
Location Changes of the Pit-Dwellings and Estimation of the Degree of the Tsunami Disaster Rate on Southern Sanriku Coast, Northeast Japan during the Jomon Period(ca 4700-2900 cal B.P.) : Cases of the Akahama-Ⅱ Site of Ootsuchi Bay and the Hamakawamesawada- I Site of Yamada Bay
No full textThe purpose of this study is to reconstruct the changing process of the altitudes over the sea of the pit-dwellings at Akahama-II site of Ootsuchi bay and Hamakawamesawada-I site of Yamada bay on the southern Sanriku coast, northeast Japan during the Jomon period(ca 4700-2900 cal B.P.) , and to estimate the degree of the tsunami disaster rate by using the inundation depth of the tsunami in the case of the 2011 Tohoku-oki earthquake.
The average altitudes of the pit-dwellings were 5.8m in around 4700 cal B.P., 3.7m in around 4600 cal B.P., and 2.5m in around 4200 cal B.P. in Akahama-II site, and were 6.9m in around 4700 cal B.P., 7.4m in around 4600 cal B.P., 6.5m in around 4500 cal B.P., and 1.6m in around 4000 cal B.P. in Hamakawame-sawada-I site.
There is a tendency to believe the inhabited period was older, the altitudes of the pit-dwellings were higher. There is also a possibility that there was not only the relative uplift of the coast in response to the sinking of the sea-level based on the Glacio-hydro Isostatic Adjustment theory, but also the actual elevation of the coast during 4700 cal B.P. and 4000 cal B.P..
On the other hand, the altitudes over the theoretical sea-level of the pit-dwellings around 4000 cal B.P.-4200 cal B.P. were too low for people to live there at both sites. It is necessary for people to live in the pit-dwellings over altitudes of at least 1 m because of the water level at high tide around the studied areas. It is estimated that the coast sank after around 4200 cal B.P..
The author puts forward that pit-dwellings during the Jomon period were hit by a tsunami that was the same level as the 2011 Tohoku-oki earthquake case, it is estimated that almost all of the pit-dwelings would have been affected by the tsunami at Akahama-II site and a few pit-dwellings would have been safe at Hamakawamesawada-I site.departmental bulletin pape
Evaluatie veldmetingen. Open taludbekledingen; bundeling huidige kennis
No full textIn het kader van het onderzoek aan open taludbekledingen zijn een drietal veldmeetmethoden ontwikkeld en toegepast. Daarnaast is het mogelijk het gedrag van een taludbekleding te voorspellen aan de hand van analytische relaties. Het gaat hierbij met name om de belasting op de toplaag ten gevolge van golfbelasting, en om overdrukken onder de toplaag die ontstaan indien de waterstand in de filterlaag een wisselende buitenwaterstand niet kan volgen. De drie meetmethoden zijn gebundeld in drie aparte verslagen, waarin ook de separate meetverslagen zijn te vinden. Dit verslag beoogt een overzicht te geven van de beschikbare methoden om doorlatendheden, lektijd en leklengte te bepalen. De ervaringen en resultaten worden met elkaar vergeleken. Hierdoor kan het toepassingsgebied van de diverse methodes worden aangegeven. Ten slotte volgen praktische aanwijzingen voor het bepalen van de eigenschappen van bestaande taludbekledingen.Steenzettingen - TAW/EN
Reststerkte van dijkbekledingen. Sterkte van klei onder golfbelasting
No full textDeel VI. Analyse van Deltagootmetingen In het kader van het onderzoek van de reststerkte van klei onder een dijkbekleding is een analyse verricht van de gemeten waterspanningen in en op het talud bij de reststerkteproeven, die zijn uitgevoerd in de Deltagoot in 1991/1992. De respons van de waterspanningsmeters is sterk afhankelijk van de locale condities in de klei. De optredende waterspanningsgradiënten zijn voldoende om klei uit het talud te lichten. Voor het juiste moment van het optreden van schade zijn cohesie- en interlock van de klei-aggregaten van belang. De toegebrachte erosieschade schaalt met de toegevoerde energie.Steenzettingen - TAW/EN
Meting van getij en freatische lijn . Open taludbekleding; bundeling van huidige kennis
No full textIn het kader van het onderzoek aan open taludbekledingen zijn metingen verricht van getij en freatische lijn bij steenzettingen. Dit rapport bundelt de hierbij opgedane kennis en ervaring. Het meetsysteem wordt besproken, de belangrijkste resultaten worden besproken, en de voor- en nadelen van de meetmethode komen aan bod. In de Appendices zijn de seperate meetverslagen en analyses van de metingen zoals deze tot dusver zijn uitgevoerd opgenomen. Dit rapport maakt deel uit van een serie rapporten over veldmetingen. Deze serie bestaat, behalve uit dit rapport, uit een bundeling van de kennis van natuurmetingen (gedrag taludbekleding bij storm), een bundeling van de kennis van infiltratiemetingen en uit een samenvattend verslag van de drie typen metingen.Steenzettingen - TAW/EN
Natuurmeting. Gedrag taludbekleding bij storm; bundeling van huidige kennis.
No full textIn het kader van het onderzoek aan open taludbekledingen zijn metingen verricht onder stormomstandigheden. Dit rapport bundelt de hierbij opgedane kennis en ervaring. Daarnaast wordt het meetsysteem besproken en komen de voor- en nadelen van de methode aan bod. In de Appendices zijn de separate meetverslagen en de analyse van de metingen opgenomen.Steenzettingen - TAW/EN
Academic authorship: who, why and in what order?
No full textWe are frequently asked by our colleagues and students for advice on authorship for scientific articles. This short paper outlines some of the issues that we have experienced and the advice we usually provide. This editorial follows on from our work on submitting a paper1 and also on writing an academic paper for publication.2 We should like to start by noting that, in our view, there exist two separate, but related issues: (a) authorship and (b) order of authors. The issue of authorship centres on the notion of who can be an author, who should be an author and who definitely should not be an author, and this is partly discipline specific. The second issue, the order of authors, is usually dictated by the academic tradition from which the work comes. One can immediately envisage disagreements within a multi-disciplinary team of researchers where members of the team may have different approaches to authorship order
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