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Introduction: segmentation of 3d shapes is a fundamental problem in computer graphics and computer-aided design. It has received much plays attention in recent years. The analysis and research methods of 3d mesh models have established reliable mathematical foundations in graphics and geometric modeling. Compared with color and texture, shape features describe the shape information of objects from geometric structure features. And it an important role in a wide range of applications, including mesh parameterization, skeleton extraction, resolution modeling, shape retrieval, character recognitio,, robot navigation, and many others. Methods: The interactive selection surface of models is mainly used for shape segmentation. The common method is boundary-based selection, which requires user input some stokes near the edge of the selected or segmented region. Chen et al.introduced an approach to join the specified points form the boundaries for region segmentation on the surface. Funkhouser et al. improve the Dijkstra algorithm to find segmentation boundary contour. The graph cut algorithm use the distance between the surface and its convex hull as the growing criteria to decompose a shape into meaningful components. The watershed algorithm, widely used for image segmentation, is a region-growing algorithm with multiple seed points. Wu and Levine use simulated electrical charge distributions over the mesh to deal with the 3D part segmentation problem. Other methods using a watershed algorithm for surface decomposition. Results: We implemented our algorithm in C++ and Open MP and conducted the experiments on a PC with a 3.07 GHz Intel(R) Core(TM) i7 CPU and 6 GB memory. Our method can get a similar region under different interaction vertices in specific regions. Figure 6a and Figure 6b are the calculation results of tolerance region selection of this algorithm in a certain region of kitten model at two different interaction points, from which we can see the obtained regions are similar from different vertices in this region. Figure 6c and figure 6d are two different interactive points in the same region, and the region selection results are obtained by Region growing technique. Discussion: In this paper, we proposed a novel magic wand selection tool to interactive select surface of 3D model. The feature vector is constructed by extracting the HKS feature descriptor and means curvature of 3D model surface, which allows users to input the feature tolerance value for region selection and improves the self-interaction of users. Many experiments show that our algorithm has obvious advantages in speed and effectiveness. The interactive generation of region boundary is very useful for many applications including model segmentation. Conclusion: In consideration of a couple of requirements including user-friendliness and effectiveness in model region selection, we propose a novel magic wand selection tool to interactive selection surface of 3D models. First, we pre-compute the heat kernel feature and mean curvature of the surface, and then form the eigenvector of the model. Then we provide two ways for region selection. One is to select the region according to the feature of tolerance value. The other is to select the region that aligns with stroke automatically. Finally, we use the geometry optimization approach to improve the performance of the computing region con-tours. Extensive experimental results show that our algorithm is efficient and effective.

One of the key drivers for a firm's productivity growth is management. One lean management practice considered cost-effective is Kaizen. Originally from Japan, the Kaizen basic concept is continuous improvement with the involvement of the full workforce. Using a firm-level dataset from Brazil's innovation and manufacturing surveys, this paper evaluates quantitatively whether Kaizen has impacted the performance of domestic firms. Our initial results suggest a productivity premium on Kaizen adopters, yet when it materializes is not detectable in the short term. Moreover, the impact on innovation is observable after Kaizen implementation. Understanding these outcomes with a qualitative approach, our analysis highlights the importance of Kaizen on innovation, especially by improving worker's time at the production line as well as the long-term vision of Kaizen on productivity. In summary, Kaizen is not a magic wand that improves firms’ performance in a wide array of indicators yet it may boost innovation outcomes in the short term aiming to improve productivity in the long term if it is implemented carefully and persistently, as established by its basic principles.

Tooth loss can have not just a physical handicap but also a psychological bearing on an individual. Avulsion or complete displacement of the tooth from the socket can result due to various factors ranging from road traffic accidents to domestic abuse. Replantation of such avulsed teeth has been a topic of debate owing to the duration of extra oral time, storage medium and long term success. In this case report we discuss the successful replantation of an avulsed permanent tooth with an increased extra oral dry time using Injectable form of Platelet rich fibrin (i- PRF).

Introduction Distal penile and coronal hypospadui constitutes about 70% of the total hypospadui number yet there is no magical wand to solve the problem. Materials and Methods Twenty nine patients were followed up for average of 2 years, (range between 6 months to 5.4 years) age ranged between 1.4 years to 5.2 years. No stent was left, no urethral catheter was left, with minimal tissue dissection and the average operation time was 25 minutes. And patients were discharged on the same day. Results Of the 29 patients, all patients were free at long term follow up with no complications but 3 had different degrees of urethral cover suture loss ranged from 1-2 sutures loss to complete cover loss. No urethral meatal stenosis, no urethral diverticulum and no urethral fistula were found. Discussion Aseel’s operation provides simple easy and time saving alternative for distal penile and coronal hypospadui closure with less complication even in the case of complications and complete cover loss there is no problem ok in redoing it or any other alternative because of the minimal tissue dissection. Conclusion Aseel’s operation is a good alternative for distal penile and coronal hypospadui closure but nothing is complete, yet it is a good alternative for hypospadius repair. Keywords: Hypospadias; Aseel operation; Penile; Coronal.