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Internal erosion is one of the major reasons for embankment dam failures. Despite this, the knowledge of the temporal development of internal erosion in full scale structures is limited. Results from a research field monitoring program by daily resistivity measurements in Sweden clearly show long term changes in resistivity in the embankment dam. The results indicate that resistivity monitoring ca
Studenterna inom lärarutbildningen vid Högskolan i Halmstad skriver under sin sista termin ett examensarbete. Enligt de bedömningskriterier som tillämpas ska examensarbetet vara såväl vetenskapligt som skol- och yrkesrelevant. Examensarbetet bedöms av akademiska lärare och bedömningarna ligger till grund för betygsättningen av examensarbetena. Efter att examensarbetena betygsatts, kommenteras de g
Vehicle-to-Vehicle (V2V) communication is an en-abler for improved traffic safety and congestion control. As for any wireless system the ultimate performance limit is determined by the propagation channel. A particular point of interest is the shadowing effect of large vehicles such as trucks and buses, as this might affect the communication range significantly. In this paper we present measuremen
The security industry has traditionally been highly fragmented and vendors have opted for proprietary standards that induce customer lockin. Several factors – including absence of network effects, end-user heterogeneity and low barriers of entry – have contributed to the dearth of standards. The shift to digital product platforms did not initially change the structural dynamics that inhibit standa
This monograph is a slightly revised version of my dissertation from 2005.
Current passive RFID systems face the challenges to locate mobile objects in real time in indoor environments, including the realization of low delay as well as effective cooperation among readers and accurate ranging ability in the physical layer. In order to overcome these challenges, this paper presents a low delay multi-reader passive RFID system using ultra high frequency (UHF) radio as the f
In a masterly book, Roderick MacFarquhar and Michael Schoenhals explain why Mao launched the Cultural Revolution, and show his Machiavellian role in masterminding it (which Chinese publications conceal). In often horrifying detail, they document the Hobbesian state that ensued. The movement veered out of control and terror paralyzed the country. Power struggles raged among Lin Biao, Zhou Enlai, De
Popular Abstract in Swedish Jorden i vår natur är en mycket komplex miljö som innehåller en mängd olika organismer. Bland dessa är bakterier och svampar av störst betydelse eftersom de står för en stor del av nedbrytningen av olika ämnen. Jordbakterierna utför t.ex. många av ämnesomvandlingarna av kväve, svavel och fosfor i marken. Nedbrytningen frigör näringsämnen som sedan kan utnyttjas av växteThe soil bacterial community is under the constant influence of its environment. Changing any of the factors affecting the bacterial community will induce a selection pressure which, with time, will change the community. In this work the effect of changing the temperature or pH on the soil bacterial community was studied. Measurements using the [3H]-thymidine incorporation technique showed that th
