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A kinect-based parking assistance system
Bellone, Mauro,Pascali, Luca,Reina, Giulio Techno-Press 2014 Advances in robotics research Vol.1 No.2
This work presents an IR-based system for parking assistance and obstacle detection in the automotive field that employs the Microsoft Kinect camera for fast 3D point cloud reconstruction. In contrast to previous research that attempts to explicitly identify obstacles, the proposed system aims to detect "reachable regions" of the environment, i.e., those regions where the vehicle can drive to from its current position. A user-friendly 2D traversability grid of cells is generated and used as a visual aid for parking assistance. Given a raw 3D point cloud, first each point is mapped into individual cells, then, the elevation information is used within a graph-based algorithm to label a given cell as traversable or non-traversable. Following this rationale, positive and negative obstacles, as well as unknown regions can be implicitly detected. Additionally, no flat-world assumption is required. Experimental results, obtained from the system in typical parking scenarios, are presented showing its effectiveness for scene interpretation and detection of several types of obstacle.
Graziella Bellone,Barbara Vizio,Tiziana Scirelli,Giorgio Emanuelli 한국조직공학과 재생의학회 2017 조직공학과 재생의학 Vol.14 No.3
Several clinical conditions may limit the success of bone regeneration and/or implant osseointegration. For this reason, many compounds have been tested for their ability to stimulate this biological process. Synthetic hydroxyapatite (HA), mimicking natural bone hydroxyapatite, and extra-cellular matrix proteins, such as type I collagen, are potential candidates. However, the synthetic origin of HA and the denaturing conditions required for extracting collagen from skin and derma are sources of potential drawbacks. This study examines the in vitro effects of a natural bone derivative (NBD) extracted from equine bone and containing both natural, non-synthetic bone hydroxyapatite and native, non-denatured, type I bone collagen as a possible active compound for stimulating bone regeneration and implant osseointegration. The activity of NBD was tested on bone marrow stromal cells (BMSCs), evaluating their growth/viability by the methylthiazol tetrazolium (MTT) assay and their migration potential by a scratch assay. Moreover, expression of the hyaluronic acid receptor (CD44) and the C-X-C chemokine receptor type 4 (CXCR4, CD184) on the surface of BMSCs was assessed by flow cytometry, and the release of Transforming Growth Factor (TGF)-b, Interleukin (IL)-1a and IL-6 was quantified using an enzyme-linked immunosorbent assay (ELISA). The effect of NBD-coated implants on human osteoblasts was tested by measuring alkaline phosphatase (ALP) activity with the p-nitrophenyl phosphate (pNPP) degradation test. NBD stimulated BMSC growth/viability, migration, CD184 surface expression and the release of TGF-b1. NBD-coated implants increased ALP activity of human osteoblasts. These results indicate that NBD may be an adjuvant to accelerate both bone regeneration and osseointegration.
Valentina Zunino,Giorgia Meineri,Graziella Bellone,Barbara Vizio,Adriana Prat,Maurizio Grandi,Elisabetta Radice,Federica Dal Bello,Claudio Medana 경희대학교 융합한의과학연구소 2017 Oriental Pharmacy and Experimental Medicine Vol.17 No.4
In recent years, there has been growing interest in plant-derived products for their bioactive properties., Results and Conclusion. This study aimed to verify the effect of an herbal-food supplement, comprising alcoholic extracts of Epilobium, Urtica dioica and Evernia prunastri (YATROS, Etnopharma, Turin, Italy), alone or in combination with 5-Fluorouracil, on cell growth, DNA synthesis, cell-cycle profile, cytoskeleton reorganization and E-cadherin protein expression, in the murine colon carcinoma cell line C26. Assays used were respectively the Neutral Red uptake assay, median effect analysis, tritiated thymidine incorporation, flow cytometry, Phalloidin staining, and immunohistochemistry. A chemical fingerprint and multidimensional HPLC-UV-HRMS analysis was also performed on the herbal-food supplements. Intriguingly, a substantial synergistic inhibitory effects on cell growth, DNA synthetic activity and percentage of cells in S phase were noticed when YATROS was combined with 5-Fluorouracil, reducing both dose and timing of exposure of C26 cells to the drug. Moreover, by inducing cytoskeleton reorganization and E-cadherin expression, YATROS can interfere with tumor cell invasiveness. These indications of an agonistic interaction between YATROS and 5-Fluorouracil in colon carcinoma cells may be of interest for clinical applications, and thus merit further investigation.
Aldo Bellon,Isztar Zawadzki,Alamelu Kilambi,Hee Choon Lee,이규원 한국기상학회 2010 Asia-Pacific Journal of Atmospheric Sciences Vol.46 No.3
A Variational Echo Tracking (VET) technique has been applied to four months of archived data from the South Korean radar network in order to examine the influence of the various user-selectable parameters on the skill of the resulting 20-min to 4-h nowcasts. The latter are computed over a (512 × 512) array at 2-km resolution. After correcting the original algorithm to take into account the motion of precipitation across the boundaries of such a smaller radar network,we concluded that the set of default input parameters initially assumed is very close to the optimum combination. Decreasing to (5 × 5) or increasing to (50 × 50) the default vector density of (25 × 25), using two or three maps for velocity determination, varying the relative weights for the constraints of conservation of reflectivity and of the smoothing of the velocity vectors, and finally the application of temporal smoothing all had only marginal effects on the skill of the forecasts. The relatively small sensitivity to significant variations of the VET default parameters is a direct consequence of the fact that the major source of the loss in forecast skill cannot be attributed to errors in the forecast motion, but to the unpredictable nature of the storm growth and decay. Changing the time interval between maps, from 20to 10 minutes, and significantly increasing the reflectivity threshold from 15 to 30 dBZ had a more noticeable reduction on the forecast skill. Comparisons with the Eulerian “zero velocity” forecast and with a "single" vector forecast have also been performed in order to determine the accrued skill of the VET algorithm. Because of the extensive stratiform nature of the precipitation areas affecting the Korean peninsula, the increased skill is not as large as may have been anticipated. This can be explained by the greater extent of the precipitation systems relative to the size of the radar coverage domain
Ashley L. Dockens,Monica L. Bellon-Harn,Vinaya Manchaiah 대한청각학회 2016 Journal of Audiology & Otology Vol.20 No.2
Background and Objectives: Patient-centeredness is a critical approach to rehabilitation in allied health professions and is an imperative component of evidence-based practice. However, it is unknown if patient-centeredness is valued by students enrolled in allied health. This study was aimed at determining preferences to patient-centeredness in pre-service speech and hearing students in the field of speech and hearing sciences. Subjects and Methods: Pre-service speech and hearing students (n=93) completed the Patient-Practitioner Orientation Scale (PPOS) and were grouped according to low, medium, or high exposure to curriculum content. Results: Across exposure levels, students exhibited high preference to patient centeredness with a mean PPOS score of 4.13 (standard deviation–0.5). A pairedsample t-test revealed a significant difference (p≤0.0001) between the caring and sharing subscales of the PPOS with lower mean scores on the caring subscale. No significant differences were noted across levels of exposure for sharing subscale, caring subscale, or PPOS full-scale. Conclusions: Results suggest a need for curriculum enhancement focused on improved caring and empathy
Hee Choon Lee,Jong-Chul Ha,Aldo Bellon,Isztar Zawadzki,이규원,Yong Hee Lee,Dong-Eon Chang 한국기상학회 2010 Asia-Pacific Journal of Atmospheric Sciences Vol.46 No.3
The MAPLE system has been implemented in real-time in Korea since June 2008, producing forecasts up to 6 hours every 10minutes. An object-oriented verification method has been applied for the summer season (June-July-August) over the Korean Peninsula to evaluate and understand the characteristics of the forecast results. The CRA (contiguous rain area) approach is used to decompose the total error into the different error components; location, pattern, and volume errors. The mean displacement error is smaller than 20 km up to the 3-h forecasts and increases with forecast time. The ratio between the displacement (location) error and the total error is less than 7% even for a 3-h forecast. This result indicates that MAPLE produces reliable forecast in terms of precipitation location. However,the pattern error is larger than 90% of the total error. Contingency scores that are defined with different categories of rain intensity and displacement errors show the outstanding performance up to 2.5hours. MAPLE overpredicts rain areas with the threshold of 1 mm h−1rain intensity throughout forecast periods. However, the heavy rainfall events are poorly predicted due to the inherent limitation of extrapolation-based nowcasting technique
Examination of an Audiologist’s Response to Patient’s Expression of Symptoms: A Pilot Study
Ashley L. Dockens,Monica L. Bellon-Harn,Erin S. Burns,Vinaya Manchaiah,Orlando Hinojosa 대한청각학회 2017 Journal of Audiology & Otology Vol.21 No.2
This pilot study explores audiologist-patient interactions during initial evaluations or consultations. In particular, an audiologist’s response to patient symptoms is examined. Conversationsbetween audiologist and patients were recorded using a digital recorder, which weretranscribed, and analyzed using the Codes for Human Analysis of Transcripts and Child LanguageAnalysis computer programs. Mean length of turn and frequency of utterances relatedto explicit discussion or description of symptoms or the patient’s interpretation of symptomswas determined. Study sample: six audiologist-patient interactions were recorded and transcribed. A single audiologist was used for this pilot investigation. Results suggest that duringthe initial audiological consultations related to hearing difficulties the audiologist producedmore utterances related to explicit description of the symptoms, whereas whenduring the sessions about complex disorder and hearing aid consultation the audiologistproduced more utterances related to the patient’s interpretation of the symptoms. Also, amore equitable distribution of words and utterances per turn are observed during the initialconsultation about hearing difficulties when compared to complex disorders and hearingaid consultation sessions where the audiologist was dominant within the interaction. Thispreliminary study reveals unique insights to audiologist’s communication behavior duringaudiology consultation session. Efforts are needed to educate and promote appropriatecommunication between audiologists’ and patients, which could result in increased patientsatisfaction.