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Search Results: 1 - 10 of 672 matches for " Tip of Nose "
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Congenital Lesions of Tip of Nose: Report of Two Cases with Review  [PDF]
Snigdha Goyal, Sunder Goyal, Isha Saini, Amit Jain
Open Access Library Journal (OALib Journal) , 2015, DOI: 10.4236/oalib.1101467
Abstract: Tip of nose is most prominent part of the face. It has an aesthetic importance as well as influence on the psyche of children. Midline congenital lesions like dermoid cyst and haemangioma confined to the tip of nose are rare. Being midline structure of body congenital condition like dermoid cyst occurs due to the sequestration of the skin along the lines of embryonic closure. Haemangioma is another common congenital lesion of face in childhood. But haemangioma confined only to tip of nose is uncommon. We present these two uncommon congenital lesions of tip of nose.
3D Face Compression and Recognition using Spherical Wavelet Parametrization
Rabab M. Ramadan,Rehab F. Abdel-Kader
International Journal of Advanced Computer Sciences and Applications , 2012,
Abstract: In this research an innovative fully automated 3D face compression and recognition system is presented. Several novelties are introduced to make the system performance robust and efficient. These novelties include: First, an automatic pose correction and normalization process by using curvature analysis for nose tip detection and iterative closest point (ICP) image registration. Second, the use of spherical based wavelet coefficients for efficient representation of the 3D face. The spherical wavelet transformation is used to decompose the face image into multi-resolution sub images characterizing the underlying functions in a local fashion in both spacial and frequency domains. Two representation features based on spherical wavelet parameterization of the face image were proposed for the 3D face compression and recognition. Principle component analysis (PCA) is used to project to a low resolution sub-band. To evaluate the performance of the proposed approach, experiments were performed on the GAVAB face database. Experimental results show that the spherical wavelet coefficients yield excellent compression capabilities with minimal set of features. Haar wavelet coefficients extracted from the face geometry image was found to generate good recognition results that outperform other methods working on the GAVAB database.
Nose Tip Region Detection in 3D Facial Model across Large Pose Variation and Facial Expression
Laili Hayati Anuar,Syamsiah Mashohor,Makhfudzah Mokhtar,Wan Azizun Wan Adnan
International Journal of Computer Science Issues , 2010,
Abstract: Detecting nose tip location has become an important task in face analysis. However, for a 3D face model with presence of large rotation variation, detecting nose tip location is certainly a challenging task. In this paper, we propose a method to detect nose tip region in large rotation variation based on the geometrical shape of a nose. Nose region has always been considered as the most protuberant part of a face. Based on convex points of face surface, we use morphological approach to obtain nose tip region candidates consist of highest point density. For each point of each region candidate, a signature is generated and evaluated with trained nose tip tolerance band for matching purpose. The region that contains the point which scores the most is chosen as the final nose tip region. This method can handle large rotation variation, facial expression, combination of all rotations (yaw, pitch and roll) and large non-facial outliers. Combination of two databases has been used; UPMFace and GavabDB as training data set and test data set. The experimental results show that 95.19% nose tip region over 1300 3D face models were correctly detected.
Systemic Sarcoidosis Revealed by a Nasal Lesion: A Case Report  [PDF]
Madiha Mahfoudhi, Khaled Khammassi, Sami Turki, Mamia Ben Salah
International Journal of Clinical Medicine (IJCM) , 2015, DOI: 10.4236/ijcm.2015.64032
Abstract:
A 62-year-old man presented with bilateral nasal obstruction and recurrent epistaxis episodes. Physical examination revealed normal body temperature and free cervical lymph nodes areas. Nasal endoscopy found a congestive nasal mucosa associated to bilateral inferior turbinate hypertrophy with a granular aspect of the right inferior turbinate. The biological examination showed lymphopenia, inflammatory syndrome, high serum level of angiotensin-converting enzyme and β2 microglobulin. Tuberculin skin test and Quantiferon gold were negative. The nasal and accessory salivary gland biopsies revealed granulomatous giant cell lesions non-caseating evoking systemic sarcoidosis. Ziehl-Neelsen staining and Lowenstein culture were negative. The diagnosis was systemic sarcoidosis revealed by nasal localization. The systemic extension research was negative. The treatment was based on corticosteroids (1 mg/kg/day) and gradual degression doses associated to a local nasal corticosteroid. The outcome was favorable with improvement of nasal obstruction and disappearance of initial lesions. The follow-up was 2 years.
Rhinoplasty for Saddle Nose with Sarcoidosis  [PDF]
Masaki Yazawa, Hayato Nagashima, Katsuya Suzuki, Kazuo Kishi
Surgical Science (SS) , 2015, DOI: 10.4236/ss.2015.66035
Abstract: Background: Cases of acquired saddle nose have been reported; however, reports of sarcoidosis with acquired saddle nose are very rare. The main cause of sarcoidosis is estimated to be an abnormal immune reaction rather than infection. Aim: Rhinoplasty using an autologous rib was planned and performed without plate fixation. Case Presentation: Our patient was diagnosed with sarcoidosis at the age of 25 years. She developed nasal congestion and rhinitis at the age of 42 years. Her nose began to show the saddle nose deformity at the age of 43 years. A rhinoplasty using an autologous rib was performed without plate fixation. Conclusion: After the operation, her nose maintained a favorable shape without sarcoidosis worsening. This use of rhinoplasty for treating saddle nose possibly prevents the worsening of sarcoidosis.
Bevel Tip Deformation in New and Used Dental Needles  [PDF]
César Gaitán- Fonseca, Denise Romo- Castillo, Bernardino Cerda- Cristerna, David Masuoka, Amaury Pozos- Guillén
Microscopy Research (MR) , 2015, DOI: 10.4236/mr.2015.31001
Abstract:
Objectives: To evaluate quantitatively deformation of the angle of the horizontal plane of the bevel tip in new dental needles and in dental needles used in clinical procedures. Material and Methods: A cross-sectional study was performed with 360 dental needles from four different manufacturers. The needles were divided into four groups (90 per group): Group 1, Monoject\"\"; Group 2, DLP\"\"; Group 3, Badiject, and Group 4, Zeyco. The new and used needles were evaluated by scanning electron microscopy to evaluate quantitatively the deformation on the bevel. Results: All groups showed a significantly statistical difference between new needles and needles used for one or two injections (P < 0.05), except for those of Group 4, which exhibited no statistical difference. Conclusion: All dental needles used demonstrated tip deformation after their use, but in addition, dental needles without clinical use also showed deformation.
Applications and Technology of Electronic Nose for Clinical Diagnosis  [PDF]
Simeng Chen, Yuchao Wang, Seokheun Choi
Open Journal of Applied Biosensor (OJAB) , 2013, DOI: 10.4236/ojab.2013.22005
Abstract: Rapid advances in sensor technologies have facilitated the development of high-performance electronic noses that can detect and discriminate volatile compounds in situ. The research and development of electronic noses has resulted in a new qualitative and semi-quantitative detection approach in the field of clinical diagnostics. Electronic noses have a clear potential to be a non-invasive, simple and rapid but above all accurate early diagnostic screening tool. This review collates existing knowledge of recent advances in electronic nose technologies and applications.
Estimation of red tip disease severity in pineapple using a non-contact sensor approach  [PDF]
Siva Kumar Balasundram, Faizah Abu Kassim, Ganesan Vadamalai, Ahmad Husni Mohd Hanif
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.44029
Abstract:

Red tip disease on pineapple (Ananas comosus) was first recognized about 20 years ago in a commercial pineapple stand located in Simpang Renggam, Johor, Peninsular Malaysia. Since its discovery, there has been no confirmation on the causal agent of red tip disease. The epidemiology of red tip disease is still not fully understood. However, based on disease symptoms and field transmission mode, red tip disease seems to be strongly associated with viral infection. The aim of this work was to assess the feasibility of using an optical sensor to estimate red tip disease severity. This work was performed in a commercial pineapple plantation located in Simpang Renggam, Johor. Four observation plots bearing pineapple variety SR36 were demarcated based on crop growth stage. Each plot comprised a total of eighty corresponding measurements of percent Disease Severity (% DS) and Normalized Difference Vegetation Index (NDVI). Our data showed a strong correlation between % DS and NDVI. The 7- and 11-month plantings registered a correlation coefficient (r) of -0.83 and -0.88, respectively. The negative correlation infers that NDVI increases when disease severity is low. This is expected since healthy leaves reflect more near-infrared light and less visible light which results in a higher NDVI. The regression of NDVI on % DS for the 7-month planting was explained by: % DS = 181.6 - 185.6*NDVI. Meanwhile, the regression of NDVI on % DS for the 11-month planting was explained by: % DS = 213.2 - 219.8*NDVI. The linear fit between measured % DS and estimated % DS from the 7-month and 11-month plantings was relatively strong. This work has demonstrated that NDVI is a reliable predictor of % DS in pineapple.

Design of a Centrifugal Compressor for Micro Gas Turbine: Investigation of Scaling and Tip Clearance Effects  [PDF]
Dario Barsi, Alberto Bottino, Andrea Perrone, Luca Ratto, Pietro Zunino
Open Journal of Fluid Dynamics (OJFD) , 2019, DOI: 10.4236/ojfd.2019.91003
Abstract: The aim of this paper is to investigate the design in similarity of a centrifugal compressor for micro gas turbine and the related scaling effects on performance using CFD investigations. This work is part of a research project carried out by the Department DIME of the University of Genova, with the purpose of investigating the performance of a micro gas turbine in the change from 100 kW electrical output to 250 kW, while maintaining the compressor pressure ratio and geometry in similarity. The first part of the work focuses on the comparison between the original and the scaled machine, while the second part of the study deeply investigates the tip gap effect in the new configuration. The aim is to provide information about the performance of the compressor designed in geometrical similarity and to evaluate the tip gap height impact. From the efficiency point of view, the scaled-up machine has higher efficiency (up to 1.4% increment in design conditions) keeping the same technological limit for impeller manufacturing. However, the variation of tip gap height in the range 0 ÷ 1 mm strongly affects this parameter, leading to 10% alteration in design conditions between the ideal and worst case. The results, both in terms of overall performance and flow fields, are widely discussed in order to obtain simple yet reliable correlation for preliminary design.
Aesthetic and Functional Outcomes of Open versus Closed Septorhinoplasty in Deviated Nose Deformity  [PDF]
Seyed Mousa Sadr Hosseini, Mohammad Sadeghi, Babak Saedi, Amin Safavi, Ghasem Reza Hedaiati
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2012, DOI: 10.4236/ijohns.2012.12002
Abstract: Background: Over the years, an optimal surgical method for septorhinoplasty in deviated nose as a challenging problem was the one of common interest of plastic surgeon; the purpose of this study is to compare outcomes of open and closed methods of septorhinoplasty in patients with deviated noses. Methods: Through a prospective study, we selected seventy patients with deviated nose. Based on their deviation severity, they underwent open or closed septorhinoplasty. Patients were evaluated for deviation angles of nasal bony and cartilage components, nasal projection, nasolabial angle, nasofacial angle, and nasofrontal angle; for which three standard photos were captured pre and postoperatively. Finally the outcomes were analyzed according to their surgical methods. Results: Closed septorhinoplasty could grant a mean 11 degrees correction to nasal bony component and a mean 8.6 degrees correction to cartilage component. That’s while open septorhinoplasty could bring a mean 19.5 degrees deviation correction to the bony component and a mean 12.5 degrees deviation correction to the cartilage component. Cosmetic angles were not improved significantly after the surgery, maybe because of complicated deformities our series of patients had. Conclusion: Open septorhinoplasty resulted in better cosmetic and functional outcomes than the closed method.
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