¡@¡@An integrated device, which can be used to detect the ferrous particle concentration and the viscosity of the lubricating oils, is designed and manufactured. These two measurement units are conducted through the theoretical analysis of the design model, and the design drawing, the manufacturing, and the assembly of the components, respectively. Finally, the experiments are conducted to detect the performance of this integrated device. ¡@¡@In the measurement unit of the ferrous particle concentration, the geometry for the poles of the magnet and the air-gap flux density are designed using the Ohm¡¦s law and the magnetic hysteresis law, so that the ferrous particles in the lubricating oils is captured by the magnetic attraction at the air gap between the poles of the magnet. The pile of ferrous particles is connected with the Hall-effect sensors into a magnetic circuit. Results show that the sensitivity of the ferrous concentration measured using the magnetic circuit in series is about 600 times that using the magnetic circuit in parallel. The error is less than 0.3 ppm under the eight repeat tests. ¡@¡@In the measurement unit of the viscosity of the lubricating oils, the piston is squeezed into the oil to measure the viscosity. Since the container is easy to clean, the precision and the repeatability can be promoted. The error is less than 5% under the eight repeat tests. ¡@¡@When these two units are integrated into a measuring device, it is found that the interference between them can be neglected, and only one analysis procedure of sample oil can measure the ferrous particle concentration and the viscosity of the lubricating oils. Hence, the user can detect the lubricating oils used in many machines using this device to understand the abnormal wear and the deterioration of the oil.

No description available.

No description available.

A luminescence based marker system was developed for detection of genetically modified Pseudomonas fluorescens and E. coli. During batch growth in liquid culture, luminescence measured by luminometry was directly proportional to biomass concentration and enabled detection of 104 - 106 cells ml-1 of P. fluorescens and 101 cells ml-1 of E. coli, in actively growing cultures. Following inoculation into soil, detection levels were reduced ten-fold. After the subsequent utilisation of available nutrients, activity and luminescence decreased and luminometry then provided a direct, non-extractive means of measuring population activity of lux-marked inocula. Potential luminescence, measured as luminescence following amendment with nutrients, enabled assessment of the rate of reactivation of the lux-marked inocula and quantification of the size of the activatable population. Both these techniques, and traditional techniques, were used to investigate the survival of P. fluorescens and E. coli in soil microcosms. The effect of matric potential and indigenous organisms on luminescence and on survival of P. fluorescens was assessed. Matric potential significantly decreased the activity of both introduced and indigenous populations, but the indigenous population also significantly decreased the activity and biomass concentration of the introduced P. fluorescens population. Use of luminometry as a non-extractive measure of biomass concentration provided qualitative correlation with viable cell concentration, suggesting its potential for rapid enumeration of marked inocula. Reactivation of cells at increased matric stress was decreased, but use of high substrate:cell ratios at -30 kPa produced higher levels of luminescence and may, therefore, improve the use of luminometry as an estimate of biomass.

No description available.

No description available.

Inom yrken som polis tullbevakare och säkerhetskontrollant är det av stor betydelse att kunna avgöra när en person ljuger eller talar sanning. Forskning har visat att personer som arbetar i dessa yrken såväl som studenter, tenderar att basera sin bedömning av lögn på stereotypa uppfattningar. Studiens syfte var att undersöka kroppsspråkets betydelse vid bedömning av lögn. Deltagare var 20 säkerhetskontrollanter, 6 tullbevakare, 31 poliser och 26 personer med övriga yrken varav 42 män. Deltagarna fick svara på en enkät om kroppsspråkets betydelse. Resultatet visar att deltagarna baserar sin bedömning på stereotypa uppfattningar om vad som indikerar lögn. Säkerhetskontrollanterna och tullbevakarna skattade sin egen förmåga att upptäcka en lögn högre än både poliser och övriga yrkesarbetare, och poliser svarade i större utsträckning att de tittade efter tecken utöver kroppsspråket i sin bedömning. Fler studier om vad som verkligen indikerar lögn är nödvändiga för att undvika bedömningar som baseras på stereotypa uppfattningar.

Master of Science / Department of Computing and Information Sciences / David A. Gustafson / Current research involving vocal emotion detection has taken a variety of different approaches, and has found certain acoustic attributes to characterize different emotional states. While there have been improvements in classification over the past few years, computer classification is not nearly as accurate as human classification. This paper proposes the existence of an attribute that has not been examined, which can be used as a measure for detecting emotion in human vocal samples. It is shown that the new infrasonic attribute is significant when examining agitated emotions. Therefore, it can be used to help improve vocal emotion detection.

Development, improvement and mass spread of devices used for prospecting of metal objects in the ground entails an enormous problem to archaeology. The problem lays in mass misusing of metal detectors by amateur users or, in worse-case scenario, misusing by organized groups of thieves and planned plundering locations. Those illegal activities lead to irretrievable devastation of the cultural heritage along with the loss of information and thereby imminent danger to possibilities to learn our history. Misusage of detectors has become a society-wide problem. In a competent person's hands detectors can bring an unexpected look into the past and thus they should not be looked past by the experts. Also the potential of amateur seekers, who offer helping hand in official archaeological explorations, often lies fallow. The presented thesis is trying to describe the complicated problem of metal detectors in the broadest range and simultaneously to accent some details that the author considers to be important (e.g. pastlooked aspects of possible cooperation among archaeologists and treasure hunters). The core of this work involves four main thematic groups: metal detectors in terms of their technological development and their types, legislation and its working in practice within the Czech Republic and...

The primary aim of this research was to examine the influence of temporary mood states on factual and interpersonal skepticism. Based on recent affect-cognition theorising and research on credibility judgment, 7 studies predicted that negative moods increase and positive moods decrease skepticism, because of the information-processing consequences of these affective states. First, three studies examined the influence of mood on factual skepticism toward urban myths and legends (Study 1) and novel and familiar general knowledge claims (Studies 2-3). Contrary to predictions, Study 1 found that sad participants were less skeptical than happy participants towards urban legends, possibly due to the negative valence of the claims. Because the feeling of familiarity has been shown to be an important determinant of truth, Studies 2-3 examined the influence of mood and familiarity on skepticism. Consistent with information processing theories of mood, happy participants were more likely than sad participants to give credence to familiar general knowledge claims (Study 2), even when given explicit feedback about their actual truth or falsity during initial exposure to claims (Study 3). The remainder of this thesis extended these findings to interpersonal judgments. Studies 4-5 found that sad participants were more skeptical of the genuineness of facial expressions of emotion compared to happy participants. Studies 6-7 examined whether sad participants might also show greater lie detection accuracy. In Study 6, happy, sad and neutral-mood participants judged the credibility of targets honestly or deceptively describing their emotional reaction to an affectively-laden film, but no evidence was found of mood induced differences in deception detection accuracy. However, in Study 7, sad participants were more skeptical than happy participants about the veracity of videotaped individuals honestly or deceptively denying their involvement in a mock crime (a theft), and showed greater accuracy at discerning lies from truths. This dissertation contributes to the affect-cognition literature by demonstrating that not only may sad moods lead people to be more skeptical, but they may also confer an advantage at detecting deception. The implications of these findings for everyday credibility judgment and for contemporary theories of affect and cognition are considered.