Top PDF Problems In Indoor Mapping and Modelling

Problems In Indoor Mapping and Modelling

Problems In Indoor Mapping and Modelling

While IMM used to be the privy of engineers, planners, consultants, contractors, and designers, this is no longer the case as commercial enterprises and individuals are also beginning to apply indoor models in their business process and applications. There are three main reasons for this. Firstly, the last two decades have seen greater use of spatial information by enterprises and the public. Secondly, IMM has been complimented by advancements in mobile computing and internet communications, making it easier than ever to access and interact with spatial information. Thirdly, indoor modelling has been advanced geometrically and semantically, opening doors for developing user-oriented, context-aware applications. This reshaping of the public’s attitude and expectations with regards to spatial information has realised new applications and spurred demand for indoor models and the tools to use them.
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Characterising, modelling and mapping malaria occurrence and its mortality trend for precision public health

Characterising, modelling and mapping malaria occurrence and its mortality trend for precision public health

c) Water development projects and distance from water bodies: big and small development projects, e.g. dams and ponds, can increase the malaria incidence, in villages that are located near them. They create more breeding habitats and more vectors implies more malaria transmission. Thompson et al. (1997) reported that in Maputo, Mozambique, the risk of malaria was 6.2 times greater for individuals living less than 200 meters from the breeding sites than that of individuals living 500 meters or more away from the breeding sites. In Tanzania, improved socioeconomic status due to rice growing has been found to lead to reduced malaria prevalence, in spite of increased mosquito populations among villages adjacent to flooded rice fields (Mutero, MCcartney, & Boelee, 2006). In Chimoio 43 % of the total area is at high risk of malaria.
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Design of an indoor mapping system using three 2D laser scanners and 6 DOF SLAM

Design of an indoor mapping system using three 2D laser scanners and 6 DOF SLAM

In further work we will improve the scan line segmentation. Currently, we use a single threshold on the distance of a point to a line segment to decide whether the line segment should be extended to this point. This threshold takes into account both the noise in the coordinates of the point and the uncertainty in the estimated line parameters. With a three sigma confidence interval this leads to a very tolerant assignment of points to line segments. While this ensures that noisy points on a planar surface are correctly grouped to a line segment, it presents a large risk that points that slightly deviate from this surface are incorrectly included in a line segment. Such under- segmentations lead to biases in the estimation of pose and plane parameters, which in turn may lead to data association failures in future scans. We want to avoid such under-segmentations by extending the statistical testing to sequences of successive points. Small systematic deviations of point sequences to a line segment can then be better recognised.
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Mapping risk of Malaria transmission in Mainland Portugal using a mathematical modelling approach

Mapping risk of Malaria transmission in Mainland Portugal using a mathematical modelling approach

Biting rate estimation. The biting rate translates the average number of mosquitoes that bite humans daily. It can be estimated as the relative density of mosquitoes in relation to human density (m) multiplied by the average number of bites that a single person experiments during one day (a- man biting habit). This parameter was estimated directly from all-night human-landing collections made in Comporta region, a former malaria’s hiperendemic area where P. falciparum was the dominant parasite species. Based on a worst-scenario case this estimates was extrapolated for the whole of Portugal. Man-biting habit calculation (a) was achieved through the product of An. atroparvus biting frequency (f) plus the anthropophilic index of the species (HBI). While f was evaluated based on the feeding frequency (per day) of laboratory reared females to which was given the daily possibility of feeding on an appropriated host, HBI was assessed by an ELISA-two sites performed with the mid-gut content of freshly- fed females [9]. All biological material (larvae and females) were collected in Comporta region following the same rationale mentioned previously.
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Anopheles fauna of coastal Cayenne, French Guiana: modelling and mapping of species presence using remotely sensed land cover data

Anopheles fauna of coastal Cayenne, French Guiana: modelling and mapping of species presence using remotely sensed land cover data

In the present study, we also investigated the ecologi- cal preferences of An. aquasalis in the coastal area of Cayenne using a regression model and remotely sensed land cover data. As in the rest of the study, modelling ef- forts were focused on the presence rather than the densi- ty of species, in order to circumvent the biases associat- ed with the different sampling methods used to build the final dataset. Nevertheless, it is clear that an unknown level of uncertainty remained, especially since human landing catches are more attractive to Anopheles mos- quitoes than automatic traps (Vezenegho et al. 2014); however, the repetitive collections of the automatic traps (two consecutive nights per week for six months) suggest the method was as exhaustive as possible. In addition, species present in low densities or in unsampled areas may not have been identified.
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THE PERFORMANCE ANALYSIS OF AN INDOOR MOBILE MAPPING SYSTEM WITH RGB-D SENSOR

THE PERFORMANCE ANALYSIS OF AN INDOOR MOBILE MAPPING SYSTEM WITH RGB-D SENSOR

Mobile mapping refers to a means of collecting geospatial data using mapping sensors that are mounted on a mobile platform. The idea of mobile mapping is basically implemented by capturing more than one images which includes the same feature point from different location. Then, the 3D spatial information of objects will be calculated and measured with respect to the mapping frame (Tao and Li, 2007). Besides, multi-sensor is corresponding with multi-platform that mounted on a various vehicles, such as automobile, aircraft, water-based vessels and unmanned aerial vehicle (UAV). In the early 2000s, a lot of land vehicular-based mobile mapping systems have been utilized in commercial applications. It means that MMS is able to meet the demand of spatial information system operators for rapid spatial data acquisition. However, most of land vehicular based MMSs has to spend lots of cost on developing different kind of system so that limiting their growth. In addition, the primary limitation of such land vehicular-based systems in terms of operation flexibility is the dependence of the availability and quality of road networks.
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Mapping tropical forest biomass with radar and spaceborne LiDAR: overcoming problems of high biomass and persistent cloud

Mapping tropical forest biomass with radar and spaceborne LiDAR: overcoming problems of high biomass and persistent cloud

airborne LiDAR, as for example Asner et al. (2010) have done in the Peruvian Ama- zon, using a similar approach as described here but with airborne-LiDAR, extrapolated to other areas using the classification of high-resolution optical rather than radar data. However, airborne LiDAR data is expensive to collect, thus whole country censuses, let alone with annual repeat, are unlikely in the near future. GLAS represents a spatially

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Detection of indoor and outdoor stairs

Detection of indoor and outdoor stairs

In previous work on the detection of indoor and outdoor stairs, Se and Brady [8] used a texture detection method based on Gabor filters to detect distant stair- cases. When close enough, staircases are then validated by looking for groups of parallel edges, where convex and concave ones are partitioned using inten- sity variation information. Staircase pose is estimated by a homography search approach. They employed an a priori staircase model. Lu and Manduchi [7] presented a stereo vision system to localize curbs and stairways for autonomous navigation. Their algorithm combines brightness information in the form of edges with 3D data from a commercial stereo system. In [9], Zhong et al. presented a navigation system for robot autonomous stairway climbing, as well as stairway modeling in mapping and building reconstruction, based on the combination of Gabor filters and fuzzy fusion phase grouping (FFPG).
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The existence and the stability of solutions for equilibrium problems with lower and upper bounds

The existence and the stability of solutions for equilibrium problems with lower and upper bounds

In this paper, we study a class of equilibrium problems with lower and upper bounds. We obtain some existence results of solutions for equilibrium problems with lower and upper bounds by employing some classical fixed-point theorems. We investigate the stability of the solution sets for the problems, and establish sufficient conditions for the upper semicon- tinuity, lower semicontinuity and continuity of the solution set mapping S : Λ 1 × Λ 2 → 2 X

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Probability weighted ensemble transfer learning for predicting interactions between HIV-1 and human proteins.

Probability weighted ensemble transfer learning for predicting interactions between HIV-1 and human proteins.

Reconstruction of host-pathogen protein interaction networks is of great significance to reveal the underlying microbic pathogenesis. However, the current experimentally-derived networks are generally small and should be augmented by computational methods for less-biased biological inference. From the point of view of computational modelling, data scarcity, data unavailability and negative data sampling are the three major problems for host-pathogen protein interaction networks reconstruction. In this work, we are motivated to address the three concerns and propose a probability weighted ensemble transfer learning model for HIV-human protein interaction prediction (PWEN-TLM), where support vector machine (SVM) is adopted as the individual classifier of the ensemble model. In the model, data scarcity and data unavailability are tackled by homolog knowledge transfer. The importance of homolog knowledge is measured by the ROC-AUC metric of the individual classifiers, whose outputs are probability weighted to yield the final decision. In addition, we further validate the assumption that only the homolog knowledge is sufficient to train a satisfactory model for host-pathogen protein interaction prediction. Thus the model is more robust against data unavailability with less demanding data constraint. As regards with negative data construction, experiments show that exclusiveness of subcellular co-localized proteins is unbiased and more reliable than random sampling. Last, we conduct analysis of overlapped predictions between our model and the existing models, and apply the model to novel host-pathogen PPIs recognition for further biological research.
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Application of a Mobile Robot to Spatial Mapping of Radioactive Substances in Indoor Environment

Application of a Mobile Robot to Spatial Mapping of Radioactive Substances in Indoor Environment

To generate a chromosome of the initial population, the algorithm apply a mask with Von Neumann Geometry (See Figure 4.4), where the center represents the current point and the extremity of the cross represent the directions allowed for the path. The choice of the direction taken is random and each direction has a probability of choice according to the amount of visits already undertaken. In other words, a point that was less visited is more likely to be visited compared to its neighbors that were most visited. In this way, all points have a probability of being chosen, guaranteeing a great diversity for the initial population. The mask can be seen in Figure 4.7a, where the possible configurations are also shown depending on the availability of neighboring points (unknown obstacles) or in case the mask is centered at the edge of grid.
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J. Braz. Comp. Soc.  vol.11 número2

J. Braz. Comp. Soc. vol.11 número2

As we mentioned earlier, finding correspondences between ontologies (ontology mapping and alignment) is one of the more difficult problems in ontology research, The issue arises not only in the context of information integration, but also more generally, whenever two ontologies with overlapping context need to be used in a single application or by a single software agent. In the ideal world, there will be standard ontologies describing models of different domains: one ontology for each area of medicine, one for business processes, one for travel applications, and so on. However, not only this is not the case today and multiple ontologies covering the same domains exist, but also the situation is likely to get worse in the future: as more ontologies are developed, there will be more ontologies with similar or overlapping content. It is unreasonable to expect that people will agree on a small set of ontologies with little or no overlap. Reasons range from practical (different applications require different views of a domain) to institutional and social (an ontology developed elsewhere could not be as good as the one we will develop ourselves). However, applications that use different ontologies for describing their domains, still need to interoperate. Therefore, we need to find correspondences between different ontologies. Given two ontologies, we need to be able to see what the similarities and differences are, and to express these correspondences (a mapping between the ontologies) in a machine-processable way. In this section, we discuss tools that help users identify the correspondences between ontologies. Our review here is necessarily brief. For a comprehensive survey of ontology- mapping tools, we refer the reader to an excellent survey by Kalfoglou and Schorlemmer [27]. In this subsection, we focus on the types of specific differences that can exist, and on different ways of specifying them.
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MIJAIL JUANOVICH NARANJO ZOLOTOV

MIJAIL JUANOVICH NARANJO ZOLOTOV

In this section we are discussing the main issues and findings in this project, although the results suggest that gamification actually motivates users to perform indoor mapping more that if they would use the non-gamified version, the main problem is that the results are not coming from objective datasets but subjective ones due to the methods of evaluation, while in related works as Urbanopoly (Celino, et al., 2012) or CityExplorer (Matyas, et al., 2008) were evaluated for around one month collecting data trough logs and by the application data itself. A similar method of evaluation was planned to be applied in this thesis project and then by having two applications available into the wild, gamified and non-gamified one for anyone to download it and later analyze the data uploaded into the database as well as the logs capturing the user behavior. Nevertheless was not possible to reach a fully ideal scenario because of some limitations related with the original application, those limitations and problems are discussed in the next subsections.
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MODELLING AND MAPPING THE OCCURRENCE OF WILDFIRE IGNITIONS IN PORTUGAL

MODELLING AND MAPPING THE OCCURRENCE OF WILDFIRE IGNITIONS IN PORTUGAL

Forest fires have been increasing in Portugal during last two decades and especially last years, being an agent of landscape changes, and important social, environmental and economic impacts. Contrarily to other southern Mediterranean European countries, where in last decades the average burnt area decreased (Spain, Italy and Greece) or stabilized (France), in Portugal the situation got worst (EC 2005, DGRF 2006). Between 1990 and 2005, about 2.3 million hectares burnt (DGRF 2006), representing about 25% of the country area, and in the recent years of 2003 and 2005 the burnt area reached the highest values since 1980 (750,932 ha). Since 2000 Portugal registered an average of about 28,500 fire ignitions per year (DGRF 2006). Statistics also shows that the number of wildfire ignitions is increasing in Portugal, Spain and Greece (EC 2005), but in Portugal its number per area unit is much higher, having proportionally more ignitions than the other southern European countries all together. Although the registration methods could differ from one country to another, the situation seems to be quite concerning. This increase of fire occurrences in the last decades is registered even if more resources are being allocated to prevention, vigilance and fire fighting, including management plans, public educational campaigns and the implementation of more restrictive legislation concerning human activities and wildfires.
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AN AUTOMATED 3D INDOOR TOPOLOGICAL NAVIGATION NETWORK MODELLING

AN AUTOMATED 3D INDOOR TOPOLOGICAL NAVIGATION NETWORK MODELLING

Indoor navigation is important for various applications such as disaster management and safety analysis. In the last decade, indoor environment has been a focus of wide research; that includes developing techniques for acquiring indoor data (e.g. Terrestrial laser scanning), 3D indoor modelling and 3D indoor navigation models. In this paper, an automated 3D topological indoor network generated from inaccurate 3D building models is proposed. In a normal scenario, 3D indoor navigation network derivation needs accurate 3D models with no errors (e.g. gap, intersect) and two cells (e.g. rooms, corridors) should touch each other to build their connections. The presented 3D modeling of indoor navigation network is based on surveying control points and it is less dependent on the 3D geometrical building model. For reducing time and cost of indoor building data acquisition process, Trimble LaserAce 1000 as surveying instrument is used. The modelling results were validated against an accurate geometry of indoor building environment which was acquired using Trimble M3 total station.
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Modelling enforcement and compliance in fisheries: a survey

Modelling enforcement and compliance in fisheries: a survey

Second, the analysis of Individual Transferable Quotas reveals the equivalence between ITQs and taxes. But, with the consideration of enforcement costs, this may not hold. The analysis of Sutinen and Andersen, with non-transferable quotas, appears to more closely parallel the case of taxes. Investigation on the ITQs case is still a work in progress. In any case, the reduced costs of enforcement favoured this tool. As the fishermen are given almost private property rights of resource use, this means that some kind of auto-regulation is guaranteed. In theory, this engages fishermen in compliance with the regulation and diminishes enforcement costs. In practice, the implementation of ITQs systems is confronted with a lot of problems including illegal behaviour (Copes, 1986).
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Performance Of Different Tillage Implements And Their Effects On Sorghum And Maize Grown In Gezira Vertisols Sudan

Performance Of Different Tillage Implements And Their Effects On Sorghum And Maize Grown In Gezira Vertisols Sudan

Abstract: Tillage practices have often been considered as limited factor to crop production in heavy clay soil. Experiments were conducted for two seasons (1998 and 1999) to investigate the effects of six tillage methods on sorghum and maize establishment and yield, weeds control and some soil physical properties. The technical performance of chisel plow and disc harrow was also investigated. Tillage methods comprehend chisel plow, disc harrow, disc plow and minimum tillage. Minimum tillage was significantly higher in all weed parameters compared to other methods. No significant differences were observed for crop establishment, plant population, total dry biomass, thousand seed weight and grain yield for both crops. Increasing the depth of chiseling and harrowing from 10 cm to 20 cm significantly (P<0.01) increased draft and drawbar power. Travel reduction under harrowing to 20 cm resulted in highly significant differences (P 0.01) compared to other treatments. The effective field capacity, field efficiency and fuel consumption rates of chisel and harrowing at different depths of operation showed no significant differences. However, minimum tillage (ridging only) was the lease in fuel consumption and cost, 3.5 l ha-1 and 2 US$ ha-1, respectively. The above findings indicate that although all tillage methods gave fairly similar results in all tested parameters, minimum tillage could be recommended and adopted for sorghum and maize production in Gezira Vertisols as it was less expensive implement.
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Synthesis of nanoparticeles in ductile iron with small additions of vanadium and niobium and its mechanical properties

Synthesis of nanoparticeles in ductile iron with small additions of vanadium and niobium and its mechanical properties

Ductile iron is a modern construction material and offers wide range of mechanical properties with simultaneous high wear resistance and dumping capacity [1]. From foundry practice result that in many cases production of ductile iron ensure fulfillment the Standard regarding tensile strength as well as elongation but not always yield strength archives required value. Investigations enabling affirm whether the foregoing problem can be resolve by means of small additions of vanadium, niobium and nitrogen and heat treatment are the aim of this work.

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The Impact of E-Commerce Securi ty, and National Environment  on Consumer adoption of Intern et Banking in Malaysia and  Singapore

The Impact of E-Commerce Securi ty, and National Environment on Consumer adoption of Intern et Banking in Malaysia and Singapore

publicly trusted control system, such as SET protocol should be obtained by banks and its availability and function be communicated to consumers (Tan & Thoen, 2001; Suh & Han, 2003). SET protocol was developed to address issues like non-repudiation because it uses public-key cryptography. Banks should also consider the use of trust seals such as DigiCert, VeriSign, BBB Online. MayBank’s privacy seal is displayed on its web site, compared to most other Malaysia banks that do not have or display such web assurance seal in their web site. It is, therefore, no surprise that over 30% of those surveyed used MayBank for their Internet banking transactions in Malaysia. Banks should also launch an awareness campaign to explain to consumers the control system in use in their electronic banking site. The results of this study also suggest that more than 78% of the respondents do not know what a web assurance seal is. About 15% have no knowledge of web seal and more than 66% are not sure of web seal, even if they see one.
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SOCIAL INEQUALITIES AND DECENTRALIZATION. THEORETICAL VIEWPOINTS AND EVIDENCES FROM THE HEALTH SYSTEM REFORM IN ROMANIA

SOCIAL INEQUALITIES AND DECENTRALIZATION. THEORETICAL VIEWPOINTS AND EVIDENCES FROM THE HEALTH SYSTEM REFORM IN ROMANIA

relationship between the public and private sector . Despite the important role played by the human resources, even in the fulfillment and implementation of the reforms mentioned also in the matters of system performance, efficiency and equity, this chapter didn`t form and doesn`t form a proprietary element although it is not totally ignored Buchan, . For instance, an entire spectrum of problems can correlate to the problematic of human resources having in view the supposedly improvement of the system through reforms: motivation of personnel, lack of stimulation, inequitable distribution of personnel, lack of supervision, difficulties to recruit qualified personnel, migration of the qualified personnel, etc. Beyond the obvious fact that these issues affect the health and the health conditions of the population in general, of major importance is to admit that these problems cannot be sepa- rated by the current changes that are taking place in the health system. )n fact, passing from a decentralized system has a notable impact in the matters of personnel. This fact is visible from two angles: First, the decentralization of resources, of authorities and of responsibilities highlighted these personnel issues. The dissipation of authority towards the autonomous units and the diminish of central control have placed on the agenda of the state authorities from lower level the problem of human resources so that problems and contradictions within the sector can no longer be totally credited to inefficiencies and bureaucracy at central level although the central state is guilty of leaving and de-standardizing the sector without forecasting the effects and the ways to absorb the eliminated parts in the system . Second of all, decentralization has had a mixed impact on the management of human resources. )f decentralization can be associated with a more adaptable and more flexible management of human resources, it can also generate on the other hand, problems especially where decentra- lized authority does not have the capacity or doesn`t have the complete authority to take over these new responsibilities Wang ș.a., .
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