Ankur Mittal - Academia.edu (original) (raw)

Papers by Ankur Mittal

Information searching on the web is more popular than the traditional method but is not an easy t... more Information searching on the web is more popular than the traditional method but is not an easy task on the web because the World Wide Web (WWW) is collection of huge no of document which available on internet. Thus a tool is required called search engine which helps in find the required information for user. Search engines are provide the list of document which sort according to page rank algorithm in which lots of not relevant to the user’s information needs. Hense the personalized search is required a better page rank mechanism to provide the more relevant document to user. In this paper we design a page ranking mechanism which based on the various factor time-span, interest score, activity performed, and user interest score which helps in improve the ranking.

Pan African Medical Journal, 2020

Angiomyolipoma of the kidney is a common benign mesenchymal neoplasm of kidney. A rare variant, e... more Angiomyolipoma of the kidney is a common benign mesenchymal neoplasm of kidney. A rare variant, epithelioid angiomyolipoma, however, may show malignant behavior. We report a case of epithelioid angiomyolipoma in a patient not having tuberous sclerosis which was initially misdiagnosed as renal cell carcinoma. A 39-year-old woman presented with a history of flank pain. Ultrasonography revealed a left renal mass. Contrast-enhanced computed tomography (CECT) abdomen revealed mass involving hilum of the kidney. On core biopsy a possibility of renal cell carcinoma was suggested. The patient underwent radical nephrectomy. After immunohistochemical analysis, a final diagnosis of epithelioid angiomyolipoma was made. Renal epithelioid angiomyolipoma without adipocytic component is extremely rare. It is pivotal to keep a possibility of epithelioid angiomyolipoma whenever an epithelioid renal tumor is encountered showing marked pleomorphism and mitosis. The use of melanocytic markers and specific markers of renal cell carcinoma will aid the diagnosis.

International Journal of Engineering and Advanced Technology, 2019

Overrun in terms of increase in cost and time of the infrastructure project are considered to be ... more Overrun in terms of increase in cost and time of the infrastructure project are considered to be one of India's major infrastructure issues. Any overrun of the infrastructure project will result in huge national losses as it uses taxpayers ' money. These losses can be caused due to poor managent of risk in the construction projects. Overrun is a common phenomenon that affects almost all railway projects. However, the limited effort has been made to limit the occurrence of overruns, the author attempts to define the significance risk factors of which are the outcome of the eighty-four(84) attributes that cause overruns and further the possible ways to deal with possible mitigation for Indian railway projects. The eighty-four (84) risk attributes have been identified through a detailed literature review and pilot study. The questionnaire survey is being conducted on the professionals working in the railway project. The statistical tool Exploratory factor analysis (EFA) was per...

International Journal of Engineering & Technology, 2018

In today’s scenario there will be a competition exists among various construction firm, so the ri... more In today’s scenario there will be a competition exists among various construction firm, so the risk management come into picture to assess the various risk related to project. Assigning the right severity factor as per the possibility of occurrence will impart the success of organization as well as success will impart the growth of nation with increase in G.D.P. In construction of road the assessment of right severity factor, will be considered as strength to lower down the delay of time over run. Tremendous amount of effort are applied in quantitative and qualitative manner for assessment of risk severity factor. However, many criteria for risk severity factor enable the decision making methods will smoothen the process of arriving at a solution and enable decision makers to make the right decisions. Decision-making problems need systematic approach to appraise the various alternatives using quantitative and non quantitative factors. Standard methods for solving problems will lack ...

Journal of Medical Case Reports, 2016

Background: Schwannomas, also known as neurilemmomas, are benign slow-growing neoplasms originati... more Background: Schwannomas, also known as neurilemmomas, are benign slow-growing neoplasms originating from a Schwann cell sheath. These neoplasms are rare among the mesenchymal tumors of the gastrointestinal tract. In the stomach, Schwannomas only represent 0.2 % of all gastric tumors; this makes the presentation of a schwannoma in the stomach of a man in his seventh decade unusual. This case report highlights the rarity of a schwannoma at the greater curvature of the stomach because only a few cases have been reported in the literature. This case describes the importance of including gastric schwannomas in the differential diagnosis when preoperative assessment reveals a submucosal gastric mass with gastrointestinal stromal tumor as a leading differential diagnosis because of its common occurrence at this site. Case presentation: A 72-year-old man of Indian origin presented with a painless abdominal mass with nonspecific gastrointestinal upset. An endoscopy showed a submucosal lesion in his stomach measuring 4×3×2 cm. Histology revealed a benign spindle cell tumor. Immunohistochemistry confirmed the diagnosis of gastric schwannoma. He is on regular follow-up and doing well. Conclusions: It should be remembered that a schwannoma can present as a mass lesion in the stomach and mimic gastrointestinal stromal tumor. Patients should undergo an endoscopy and a biopsy of the lesion should be done. Many patients do not undergo endoscopy which can delay diagnosis and management. As these tumors have an excellent prognosis, surgical removal is sufficient treatment. Surgeons, radiologists, pathologists and gastroenterologists must be aware of this entity.

Journal of Urology

INTRODUCTION AND OBJECTIVE: Prostatic urethral lift (PUL) using the UroLift device is a non-pharm... more INTRODUCTION AND OBJECTIVE: Prostatic urethral lift (PUL) using the UroLift device is a non-pharmacological treatment option for patients with symptomatic benign prostatic hyperplasia. Patients with this device can safely undergo prostate MRI, but the influence of this device on prostate MR image quality has not been assessed. The aim of this study is to evaluate prostate MR image quality in patients with UroLift. METHODS: This retrospective study included 43 adult men (mean age 65.2yrs; mean PSA 5.86 ng/mL) with UroLift who underwent prostate MRI at two institutions. Images from one of the institutions (n [36) were reviewed and scored based on severity of artifacts caused by the device on T2-weighted (T2W), Diffusion weighted images (DWI) and apparent diffusion coefficient (ADC) maps in the peripheral zone (PZ) and transition zone (TZ) using a 5-point scale (1 e no impact on interpretation; 5 e non-diagnostic). Total prostate gland volumes and the prostate volumes obscured by the artifacts on T2W, ADC maps and dynamic contrast enhanced (DCE) images were measured. The means of the scores assigned for severity of artifacts and percentage of gland volumes affected by the artifacts were calculated. T-test was used to compare differences in image quality scores. RESULTS: The average prostate volume was 59.1 cc (IQR: 42.7-79). The mean image quality scores were worse for DWI/ADC than T2W both in the PZ (1.7 vs 1, p[0.0001) and in the TZ (3.2 vs 1.7 p[0.001). Worse scores were observed on DWI/ADC in the TZ at the base and mid gland compared to the apex (means scores 3.8, 3.5 and 2.5, respectively; p <0.05). The mean prostate volumes obscured by artifact on T2W, ADC map and DCE were 3.3 cc (IQR:2.0-4.5), 16.2 cc (IQR:10.5-21.6) and 6.4 cc (IQR:3.4-7.3). The mean percentage of prostate volume obscured by artifacts on T2W, ADC map and DCE were 0.06 (95% CI 0.05 to 0.07), 0.3 (95% CI 0.25 to 0.35) and 0.11 (95% CI 0.08 to 0.14), respectively. CONCLUSIONS: UroLift causes artifacts that can affect prostate MRI interpretation, with greater impact in the TZ and on DWI/ADC maps (Figure 1). Men considering undergoing PUL procedure should be counseled on the negative impact of this device on quality of prostate MRI.

file and storage technologies, Feb 16, 2015

The B ε-tree File System, or BetrFS, (pronounced "better eff ess") is the first in-kernel file sy... more The B ε-tree File System, or BetrFS, (pronounced "better eff ess") is the first in-kernel file system to use a write-optimized index. Write optimized indexes (WOIs) are promising building blocks for storage systems because of their potential to implement both microwrites and large scans efficiently. Previous work on WOI-based file systems has shown promise but has also been hampered by several open problems, which this paper addresses. For example, FUSE issues many queries into the file system, superimposing read-intensive workloads on top of writeintensive ones, thereby reducing the effectiveness of WOIs. Moving to an in-kernel implementation can address this problem by providing finer control of reads. This paper also contributes several implementation techniques to leverage kernel infrastructure without throttling write performance. Our results show that BetrFS provides good performance for both arbitrary microdata operations, which include creating small files, updating metadata, and small writes into large or small files, and for large sequential I/O. On one microdata benchmark, BetrFS provides more than 4× the performance of ext4 or XFS. BetrFS is an ongoing prototype effort, and requires additional data-structure tuning to match current generalpurpose file systems on some operations such as deletes, directory renames, and large sequential writes. Nonetheless, many applications realize significant performance improvements. For instance, an in-place rsync of the Linux kernel source realizes roughly 1.6-22× speedup over other commodity file systems.

ACM Transactions on Storage, 2015

The B ε -tree File System , or B e trFS (pronounced “better eff ess”), is the first in-kernel fil... more The B ε -tree File System , or B e trFS (pronounced “better eff ess”), is the first in-kernel file system to use a write-optimized data structure (WODS). WODS are promising building blocks for storage systems because they support both microwrites and large scans efficiently. Previous WODS-based file systems have shown promise but have been hampered in several ways, which B e trFS mitigates or eliminates altogether. For example, previous WODS-based file systems were implemented in user space using FUSE, which superimposes many reads on a write-intensive workload, reducing the effectiveness of the WODS. This article also contributes several techniques for exploiting write-optimization within existing kernel infrastructure. B e trFS dramatically improves performance of certain types of large scans, such as recursive directory traversals, as well as performance of arbitrary microdata operations, such as file creates, metadata updates, and small writes to files. B e trFS can make small, ...

Journal of Management Research and Analysis, 2018

Roads and highway sector projects in India are affected with enormous delays. Over the last decad... more Roads and highway sector projects in India are affected with enormous delays. Over the last decade, as a result of paradigm shift in the volume and capacity of the road construction sector, it is very important to systematically analyze the factors of delays and to build up a concise understanding amongst the roads and highways professionals. Adopting a comprehensive project stakeholders analysis namely client, consultant and contractor, the research identified the important factors affecting the delays in Indian roads and highway construction industry and then establishing the association between factors to develop the prediction models to assess the impact of these delay factors. A questionnaire survey and personal interviews methodology was used for this research. Most critical variables causing construction delay were analyzed using factor analysis. These results will significantly contribute in controlling the time overruns in Indian road construction industry. This project delays forms a challenge for developing countries like India, where exponential costs result from difficulty in recognizing and mitigating the project delay factors. This research focuses on prominent factors causing delays in road construction industry, and accordingly proposes a suggestive framework to design a construction project in an efficient manner and assisting mitigating of delays.

Open Journal of Orthopedics, 2015

Introduction: Incidence of Spondylolisthesis in general population is 5-7%. No matter what the et... more Introduction: Incidence of Spondylolisthesis in general population is 5-7%. No matter what the etiology is, patients usually have significant functional disability. Few studies have investigated the long term effect of posterolateral fusion on functional outcome. Methodology: From July 2009 to September 2011, a total of 43 patients, operated with postero lateral fusion were followed up and evaluated based on VAS for low back pain, ODI and neurological deficits. Results: Follow up was 83% of original study population (43). Average follow up was 13 months. The mean difference between pre-operative and post-operative VAS at final follow up was 3.5 cms (SD= 2.94); ODI was 28% at 4 months and 36% at 8 months. Claudication pain relieved in all; functional outcome was Good in 67%, Fair in 27.5% and Failed in 5.5%; 75% had fusion at an average of 5.5 months. Conclusion: PLF is still a safe, promising and appealing technique especially in low grade listhesis, even though PLIF and TLIF have come up in a large way.