GANESH RAMESH - Academia.edu (original) (raw)

Papers by GANESH RAMESH

Research paper thumbnail of Indian Society of Gastroenterology consensus on ulcerative colitis

Indian Journal of Gastroenterology, 2012

Research paper thumbnail of Distribution-Based Synthetic Database Generation Techniques for Itemset Mining

9th International Database Engineering & Application Symposium (IDEAS'05), 2000

The resource requirements of frequent pattern mining algorithms depend mainly on the length distr... more The resource requirements of frequent pattern mining algorithms depend mainly on the length distribution of the mined patterns in the database. Synthetic databases, which are used to benchmark performance of algorithms, tend to have distributions far different from those observed in real datasets. In this paper we focus on the problem of synthetic database generation and propose algorithms to effectively embed within the database, any given set of maximal pattern collections, and make the following contributions: 1. A database generation technique is presented which takes k maximal itemset collections as input, and constructs a database which produces these maximal collections as output, when mined at k levels of support. To analyze the efficiency of the procedure, upper bounds are provided on the number of transactions output in the generated database. 2. A compression method is used and extended to reduce the size of the output database. An optimization to the generation procedure is provided which could potentially reduce the number of transactions generated. 3. Preliminary experimental results are presented to demonstrate the feasibility of using the generation technique.

Research paper thumbnail of Feasible Itemset Distributions in Data Mining

Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in... more Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in data mining. The resource requirements of all extant algorithms for both problems depend on the distribution of frequent patterns, a topic that has not been formally investigated. In this paper, we study properties of length distributions of frequent and maximal frequent itemset collections and provide novel solutions for computing tight lower bounds for feasible distributions. We show how these bounding distributions can help in generating realistic synthetic datasets, which can be used for algorithm benchmarking.

Research paper thumbnail of Distribution Based Database Generation Techniques for Itemset Mining

Research paper thumbnail of Geographic Targeting, Message Content and Character Limitation Subgroup Report

Research paper thumbnail of Indexing and Data Access Methods for Database Mining

Most of today's techniques for data mining and association rule mining (ARM) in particular, are r... more Most of today's techniques for data mining and association rule mining (ARM) in particular, are really "flat file mining", since the database is typically dumped to an intermediate flat file that is input to the mining software. Previous research in integrating ARM with databases mainly looked at exploiting language (SQL) as a tool for implementing mining algorithms. In this paper we explore an alternative approach, using various data access methods and systems programming techniques to study the efficiency of mining data.

Research paper thumbnail of Masticatory efficiency after rehabilitation of acquired maxillary and mandibular defects

Indian journal of dentistry

The effect of oral cancer with its therapeutic intervention involves significant facial and funct... more The effect of oral cancer with its therapeutic intervention involves significant facial and functional disabilities. It is customary to rehabilitate these patients by surgical or prosthetic means. Studies have been done to assess mastication and other functions after rehabilitation. A review of these studies for assessing masticatory function has been done under separate sections for maxillary and mandibular defects. Different masticatory tests are mentioned. Further scope for research has been highlighted.

Research paper thumbnail of Wandering Gastrostomy

Indian Journal of Surgery, 2015

Research paper thumbnail of Masticatory efficiency after rehabilitation of acquired maxillary and mandibular defects

Indian Journal of Dentistry, 2015

The effect of oral cancer with its therapeutic intervention involves significant facial and funct... more The effect of oral cancer with its therapeutic intervention involves significant facial and functional disabilities. It is customary to rehabilitate these patients by surgical or prosthetic means. Studies have been done to assess mastication and other functions after rehabilitation. A review of these studies for assessing masticatory function has been done under separate sections for maxillary and mandibular defects. Different masticatory tests are mentioned. Further scope for research has been highlighted.

Research paper thumbnail of Feasible itemset distributions in data mining

Proceedings of the twenty-second ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems - PODS '03, 2003

Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in... more Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in data mining. The resource requirements of all extant algorithms for both problems depend on the distribution of frequent patterns, a topic that has not been formally investigated. In this paper, we study properties of length distributions of frequent and maximal frequent itemset collections and provide novel solutions for computing tight lower bounds for feasible distributions. We show how these bounding distributions can help in generating realistic synthetic datasets, which can be used for algorithm benchmarking.

Research paper thumbnail of Surface bond strength in nickel based alloys

Journal of Indian Prosthodontic Society, 2013

Bonding of ceramic to the alloy is essential for the longevity of porcelain fused to metal restor... more Bonding of ceramic to the alloy is essential for the longevity of porcelain fused to metal restorations. Imported alloys used now a days in processing them are not economical. So this study was conducted to evaluate and compare the bond strength of ceramic material to nickel based cost effective Nonferrous Materials Technology Development Center (NFTDC), Hyderabad and Heraenium S, Heraeus Kulzer alloy. An Instron testing machine, which has three-point loading system for the application of load onto the specimen was utilized for analyzing bond strength of both alloys. Student t test was conducted and t value obtained was 0.644, and the mean value of flexural bond strength of indigenous alloy is 81.75 with standard deviation of 12.25 and of imported alloy is 84.42 with standard deviation of 10.35, indicating that there was no significant difference between the two alloys. Due to ever increasing cost of imported non-precious alloy the need for a cost-effective replacement was fulfilled...

Research paper thumbnail of k-Anonymization of Social Networks By Vertex Addition

Advances in Databases and Information Systems, 2011

With an abundance of social network data being released, the need to protect sensitive informatio... more With an abundance of social network data being released, the need to protect sensitive information within these networks has become an important concern of data publishers. In this paper we focus on the popular notion of k- anonymization as applied to node degrees in a social network. Given such a network N , the problem we study is to transform

Research paper thumbnail of Why Waldo befriended the dummy? k-Anonymization of social networks with pseudo-nodes

Social Network Analysis and Mining, 2012

Abstract For a graph-based representation of a social network, the identity of participants can b... more Abstract For a graph-based representation of a social network, the identity of participants can be uniquely determined if an adversary has background structural knowledge about the graph. We focus on degree-based attacks, wherein the adversary knows the degrees of particular target vertices and we aim to protect the anonymity of participants through k-anonymization, which ensures that every participant is equivalent to at least k− 1 other participants with respect to degree. We introduce a natural and novel approach of ...

Research paper thumbnail of Unicycles clavatus, Notobasis syriaca and Centaurea alexanderina, Active constituents

Biomedical & Pharmacology Journal, 2013

Research paper thumbnail of Essential fatty acid metabolism in south Indians

Prostaglandins, Leukotrienes and Essential Fatty Acids, 1994

Coronary artery disease (CAD), hypertension and diabetes mellitus are more common in Indians comp... more Coronary artery disease (CAD), hypertension and diabetes mellitus are more common in Indians compared to their incidence in the Western population. The exact reason for this is not known. One of the risk factors for the development of and complications due to CAD, hypertension and diabetes mellitus could be hyperinsulinemia and insulin resistance and low plasma levels of arachidonic acid and eicosapentaenoic acid, metabolites of dietary essential fatty acids (EFAs), cis-linoleic and alpha-linolenic acids. Fatty acid analysis of the plasma phospholipid (PL) fraction of normal Indians showed that they have low concentrations of arachidonic acid, eicosapentaenoic acid and docosahexaenoic acid in comparison to those seen in Canadian and Minnesota (USA) normals. Since insulin can activate EFA metabolism, this alteration in the EFA metabolism may, at least, in part explain the high incidence of CAD, hypertension and diabetes mellitus and insulin resistance and hyperinsulinemia that are common in Indians. _____ -

Research paper thumbnail of Prevalence and patterns of diverticulosis in patients undergoing colonoscopy in a southern Indian hospital

Indian Journal of Gastroenterology, 2012

The prevalence of diverticular disease of colon of colon is reportedly low in Asian compared to W... more The prevalence of diverticular disease of colon of colon is reportedly low in Asian compared to Western countries. We analyzed the prevalence of colonic diverticulosis in a selected cohort of patients undergoing colonoscopy. Retrospective study of records of patients undergoing colonoscopy in a tertiary hospital in southern India.

Research paper thumbnail of Evaluation and comparison of castability between an indigenous and imported Ni-Cr alloy

Indian journal of dental research : official publication of Indian Society for Dental Research, 2011

Context: Since 1907 casting restorations have been in use in dentistry. Numerous companies have b... more Context: Since 1907 casting restorations have been in use in dentistry. Numerous companies have been manufacturing and marketing base metal alloys. Gold was a major component of casting alloys. But alloys with less than 65% gold tarnished easily and the increase in cost of gold post-1970s lead to the revival of base metal alloys such as nickel-chromium and cobalt-chromium alloys which were in use since 1930s. Aim: This study was conducted to evaluate and compare the castability between an indigenous alloy and an imported alloy, as imported base metal alloys are considered to be expensive for fabrication of crowns and bridges. Materials and Methods: This study was conducted to evaluate and compare the castability (for the accurate fabrication of crowns and bridges) between an indigenous base metal alloy-Non-ferrous Materials Technology Development Centre (NFTDC), Hyderabad (Alloy A) -and an imported base metal alloys (Alloy B). Castability measurement was obtained by counting the num...

Research paper thumbnail of Benign esophageal strictures in children and adolescents: etiology, clinical profile, and results of endoscopic dilation

Gastrointestinal Endoscopy, 1996

The problem of dysphagia in children and adolescents differs from that in adults, and therefore r... more The problem of dysphagia in children and adolescents differs from that in adults, and therefore requires special consideration. Methods: Forty-one consecutive children and adolescents 16 years of age or younger (mean, 7.2 years), with benign esophageal strictures were evaluated in a prospective manner over a 7-year period. The most frequent causes of esophageal strictures were caustic ingestion and complications of endoscopic sclerotherapy of esophageal varices. Dilation was done on a weekly basis using bougies and was considered adequate if the esophageal lumen could be dilated to 15 mm diameter (11 mm in children less than 5 years old) with complete relief of dysphagia. Results: Of the 30 patients who could be adequately followed after initial dilation, 16 had corrosive strictures and 14 had strictures due to other causes. Patients with corrosive strictures required a significantly higher number of sessions for adequate initial dilation (7.8 _+ 2.5 sessions vs 1.86 ± 0.48 sessions; p< 0.01). Patients with corrosive strictures had a higher number of mean symptomatic recurrences per patient month as compared to the noncorrosive stricture group (0.15 _ 0.01 vs 0.087 ± 0.03, p < 0.01). Six esophageal perforations occurred during a total of 327 dilation sessions (1.8%); there was one fatality. Conclusions: From our experience, we conclude that benign esophageal strictures in young patients can be treated effectively and with acceptable safety by means of endoscopic dilation. (Gastrointest Endosc 1996;43:474-7.)

Research paper thumbnail of Europium doped Gd2O3 and FeCo nanoparticles for biomedical application

Nanometer-sized particles have novel optical, electronic, magnetic or structural properties and a... more Nanometer-sized particles have novel optical, electronic, magnetic or structural properties and are currently under intense development for application in cancer, cardiovascular diseases, and degenerative neurological disorders such as alzheimer&amp;amp;amp;amp;amp;#39;s disease. Targeted nanoparticle drugs offer significant advantages in improving cancer therapeutic efficacy and simultaneously reducing drug toxicity. We report here the synthesis, characterization and toxicity test of FeCo and Eu: Gd2O3

Research paper thumbnail of k-Anonymization of Social Networks By Vertex Addition

webhome.csc.uvic.ca

Abstract. With an abundance of social network data being released, the need to protect sensitive ... more Abstract. With an abundance of social network data being released, the need to protect sensitive information within these networks has become an important concern of data publishers. In this paper we focus on the popular notion of k-anonymization as applied to node degrees in ...

Research paper thumbnail of Indian Society of Gastroenterology consensus on ulcerative colitis

Indian Journal of Gastroenterology, 2012

Research paper thumbnail of Distribution-Based Synthetic Database Generation Techniques for Itemset Mining

9th International Database Engineering & Application Symposium (IDEAS'05), 2000

The resource requirements of frequent pattern mining algorithms depend mainly on the length distr... more The resource requirements of frequent pattern mining algorithms depend mainly on the length distribution of the mined patterns in the database. Synthetic databases, which are used to benchmark performance of algorithms, tend to have distributions far different from those observed in real datasets. In this paper we focus on the problem of synthetic database generation and propose algorithms to effectively embed within the database, any given set of maximal pattern collections, and make the following contributions: 1. A database generation technique is presented which takes k maximal itemset collections as input, and constructs a database which produces these maximal collections as output, when mined at k levels of support. To analyze the efficiency of the procedure, upper bounds are provided on the number of transactions output in the generated database. 2. A compression method is used and extended to reduce the size of the output database. An optimization to the generation procedure is provided which could potentially reduce the number of transactions generated. 3. Preliminary experimental results are presented to demonstrate the feasibility of using the generation technique.

Research paper thumbnail of Feasible Itemset Distributions in Data Mining

Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in... more Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in data mining. The resource requirements of all extant algorithms for both problems depend on the distribution of frequent patterns, a topic that has not been formally investigated. In this paper, we study properties of length distributions of frequent and maximal frequent itemset collections and provide novel solutions for computing tight lower bounds for feasible distributions. We show how these bounding distributions can help in generating realistic synthetic datasets, which can be used for algorithm benchmarking.

Research paper thumbnail of Distribution Based Database Generation Techniques for Itemset Mining

Research paper thumbnail of Geographic Targeting, Message Content and Character Limitation Subgroup Report

Research paper thumbnail of Indexing and Data Access Methods for Database Mining

Most of today's techniques for data mining and association rule mining (ARM) in particular, are r... more Most of today's techniques for data mining and association rule mining (ARM) in particular, are really "flat file mining", since the database is typically dumped to an intermediate flat file that is input to the mining software. Previous research in integrating ARM with databases mainly looked at exploiting language (SQL) as a tool for implementing mining algorithms. In this paper we explore an alternative approach, using various data access methods and systems programming techniques to study the efficiency of mining data.

Research paper thumbnail of Masticatory efficiency after rehabilitation of acquired maxillary and mandibular defects

Indian journal of dentistry

The effect of oral cancer with its therapeutic intervention involves significant facial and funct... more The effect of oral cancer with its therapeutic intervention involves significant facial and functional disabilities. It is customary to rehabilitate these patients by surgical or prosthetic means. Studies have been done to assess mastication and other functions after rehabilitation. A review of these studies for assessing masticatory function has been done under separate sections for maxillary and mandibular defects. Different masticatory tests are mentioned. Further scope for research has been highlighted.

Research paper thumbnail of Wandering Gastrostomy

Indian Journal of Surgery, 2015

Research paper thumbnail of Masticatory efficiency after rehabilitation of acquired maxillary and mandibular defects

Indian Journal of Dentistry, 2015

The effect of oral cancer with its therapeutic intervention involves significant facial and funct... more The effect of oral cancer with its therapeutic intervention involves significant facial and functional disabilities. It is customary to rehabilitate these patients by surgical or prosthetic means. Studies have been done to assess mastication and other functions after rehabilitation. A review of these studies for assessing masticatory function has been done under separate sections for maxillary and mandibular defects. Different masticatory tests are mentioned. Further scope for research has been highlighted.

Research paper thumbnail of Feasible itemset distributions in data mining

Proceedings of the twenty-second ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems - PODS '03, 2003

Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in... more Computing frequent itemsets and maximally frequent itemsets in a database are classic problems in data mining. The resource requirements of all extant algorithms for both problems depend on the distribution of frequent patterns, a topic that has not been formally investigated. In this paper, we study properties of length distributions of frequent and maximal frequent itemset collections and provide novel solutions for computing tight lower bounds for feasible distributions. We show how these bounding distributions can help in generating realistic synthetic datasets, which can be used for algorithm benchmarking.

Research paper thumbnail of Surface bond strength in nickel based alloys

Journal of Indian Prosthodontic Society, 2013

Bonding of ceramic to the alloy is essential for the longevity of porcelain fused to metal restor... more Bonding of ceramic to the alloy is essential for the longevity of porcelain fused to metal restorations. Imported alloys used now a days in processing them are not economical. So this study was conducted to evaluate and compare the bond strength of ceramic material to nickel based cost effective Nonferrous Materials Technology Development Center (NFTDC), Hyderabad and Heraenium S, Heraeus Kulzer alloy. An Instron testing machine, which has three-point loading system for the application of load onto the specimen was utilized for analyzing bond strength of both alloys. Student t test was conducted and t value obtained was 0.644, and the mean value of flexural bond strength of indigenous alloy is 81.75 with standard deviation of 12.25 and of imported alloy is 84.42 with standard deviation of 10.35, indicating that there was no significant difference between the two alloys. Due to ever increasing cost of imported non-precious alloy the need for a cost-effective replacement was fulfilled...

Research paper thumbnail of k-Anonymization of Social Networks By Vertex Addition

Advances in Databases and Information Systems, 2011

With an abundance of social network data being released, the need to protect sensitive informatio... more With an abundance of social network data being released, the need to protect sensitive information within these networks has become an important concern of data publishers. In this paper we focus on the popular notion of k- anonymization as applied to node degrees in a social network. Given such a network N , the problem we study is to transform

Research paper thumbnail of Why Waldo befriended the dummy? k-Anonymization of social networks with pseudo-nodes

Social Network Analysis and Mining, 2012

Abstract For a graph-based representation of a social network, the identity of participants can b... more Abstract For a graph-based representation of a social network, the identity of participants can be uniquely determined if an adversary has background structural knowledge about the graph. We focus on degree-based attacks, wherein the adversary knows the degrees of particular target vertices and we aim to protect the anonymity of participants through k-anonymization, which ensures that every participant is equivalent to at least k− 1 other participants with respect to degree. We introduce a natural and novel approach of ...

Research paper thumbnail of Unicycles clavatus, Notobasis syriaca and Centaurea alexanderina, Active constituents

Biomedical & Pharmacology Journal, 2013

Research paper thumbnail of Essential fatty acid metabolism in south Indians

Prostaglandins, Leukotrienes and Essential Fatty Acids, 1994

Coronary artery disease (CAD), hypertension and diabetes mellitus are more common in Indians comp... more Coronary artery disease (CAD), hypertension and diabetes mellitus are more common in Indians compared to their incidence in the Western population. The exact reason for this is not known. One of the risk factors for the development of and complications due to CAD, hypertension and diabetes mellitus could be hyperinsulinemia and insulin resistance and low plasma levels of arachidonic acid and eicosapentaenoic acid, metabolites of dietary essential fatty acids (EFAs), cis-linoleic and alpha-linolenic acids. Fatty acid analysis of the plasma phospholipid (PL) fraction of normal Indians showed that they have low concentrations of arachidonic acid, eicosapentaenoic acid and docosahexaenoic acid in comparison to those seen in Canadian and Minnesota (USA) normals. Since insulin can activate EFA metabolism, this alteration in the EFA metabolism may, at least, in part explain the high incidence of CAD, hypertension and diabetes mellitus and insulin resistance and hyperinsulinemia that are common in Indians. _____ -

Research paper thumbnail of Prevalence and patterns of diverticulosis in patients undergoing colonoscopy in a southern Indian hospital

Indian Journal of Gastroenterology, 2012

The prevalence of diverticular disease of colon of colon is reportedly low in Asian compared to W... more The prevalence of diverticular disease of colon of colon is reportedly low in Asian compared to Western countries. We analyzed the prevalence of colonic diverticulosis in a selected cohort of patients undergoing colonoscopy. Retrospective study of records of patients undergoing colonoscopy in a tertiary hospital in southern India.

Research paper thumbnail of Evaluation and comparison of castability between an indigenous and imported Ni-Cr alloy

Indian journal of dental research : official publication of Indian Society for Dental Research, 2011

Context: Since 1907 casting restorations have been in use in dentistry. Numerous companies have b... more Context: Since 1907 casting restorations have been in use in dentistry. Numerous companies have been manufacturing and marketing base metal alloys. Gold was a major component of casting alloys. But alloys with less than 65% gold tarnished easily and the increase in cost of gold post-1970s lead to the revival of base metal alloys such as nickel-chromium and cobalt-chromium alloys which were in use since 1930s. Aim: This study was conducted to evaluate and compare the castability between an indigenous alloy and an imported alloy, as imported base metal alloys are considered to be expensive for fabrication of crowns and bridges. Materials and Methods: This study was conducted to evaluate and compare the castability (for the accurate fabrication of crowns and bridges) between an indigenous base metal alloy-Non-ferrous Materials Technology Development Centre (NFTDC), Hyderabad (Alloy A) -and an imported base metal alloys (Alloy B). Castability measurement was obtained by counting the num...

Research paper thumbnail of Benign esophageal strictures in children and adolescents: etiology, clinical profile, and results of endoscopic dilation

Gastrointestinal Endoscopy, 1996

The problem of dysphagia in children and adolescents differs from that in adults, and therefore r... more The problem of dysphagia in children and adolescents differs from that in adults, and therefore requires special consideration. Methods: Forty-one consecutive children and adolescents 16 years of age or younger (mean, 7.2 years), with benign esophageal strictures were evaluated in a prospective manner over a 7-year period. The most frequent causes of esophageal strictures were caustic ingestion and complications of endoscopic sclerotherapy of esophageal varices. Dilation was done on a weekly basis using bougies and was considered adequate if the esophageal lumen could be dilated to 15 mm diameter (11 mm in children less than 5 years old) with complete relief of dysphagia. Results: Of the 30 patients who could be adequately followed after initial dilation, 16 had corrosive strictures and 14 had strictures due to other causes. Patients with corrosive strictures required a significantly higher number of sessions for adequate initial dilation (7.8 _+ 2.5 sessions vs 1.86 ± 0.48 sessions; p< 0.01). Patients with corrosive strictures had a higher number of mean symptomatic recurrences per patient month as compared to the noncorrosive stricture group (0.15 _ 0.01 vs 0.087 ± 0.03, p < 0.01). Six esophageal perforations occurred during a total of 327 dilation sessions (1.8%); there was one fatality. Conclusions: From our experience, we conclude that benign esophageal strictures in young patients can be treated effectively and with acceptable safety by means of endoscopic dilation. (Gastrointest Endosc 1996;43:474-7.)

Research paper thumbnail of Europium doped Gd2O3 and FeCo nanoparticles for biomedical application

Nanometer-sized particles have novel optical, electronic, magnetic or structural properties and a... more Nanometer-sized particles have novel optical, electronic, magnetic or structural properties and are currently under intense development for application in cancer, cardiovascular diseases, and degenerative neurological disorders such as alzheimer&amp;amp;amp;amp;amp;#39;s disease. Targeted nanoparticle drugs offer significant advantages in improving cancer therapeutic efficacy and simultaneously reducing drug toxicity. We report here the synthesis, characterization and toxicity test of FeCo and Eu: Gd2O3

Research paper thumbnail of k-Anonymization of Social Networks By Vertex Addition

webhome.csc.uvic.ca

Abstract. With an abundance of social network data being released, the need to protect sensitive ... more Abstract. With an abundance of social network data being released, the need to protect sensitive information within these networks has become an important concern of data publishers. In this paper we focus on the popular notion of k-anonymization as applied to node degrees in ...