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Article ; Online: Customer retention and churn prediction in the telecommunication industry: a case study on a Danish university.

Saleh, Sarkaft / Saha, Subrata

2023 Volume 5, Issue 7, Page(s) 173

Abstract: In this study, we explore the possible factors affecting churn in the Danish telecommunication industry and how those factors connect with retention strategies. The Danish telecommunication industry is experiencing a saturated market regarding the number ...

Abstract	In this study, we explore the possible factors affecting churn in the Danish telecommunication industry and how those factors connect with retention strategies. The Danish telecommunication industry is experiencing a saturated market regarding the number of customers, but the number of service providers has increased significantly in recent years. Due to the high costs of acquiring new customers, the telecommunication industry put great emphasis on retaining customers in such an intensely competitive industry. We employ five machine learning algorithms: random forest, AdaBoost, logistic regression, extreme gradient boosting classifier, and decision tree classifier on four datasets from two geographical regions, Denmark and the USA. The first three datasets are from online repositories, and the last one contains responses from 311 students from Aalborg University collected through a survey. We identify key features extracted by the best-performing algorithms based on five performance measures. Based on that, we aggregate all the features that appear important for each dataset. The results demonstrate that customers' preferences are not aligned. Among the prominent drivers, we find that service quality, customer satisfaction, offering subscription plan upgrades, and network coverage are unique to the Danish student population. Telecommunication companies need to integrate the sociohistoric milieu of the Nordic countries to tailor their retention policies to different consumer cultures. Supplementary information: The online version contains supplementary material available at 10.1007/s42452-023-05389-6.
Language	English
Publishing date	2023-06-03
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2947292-1
ISSN	2523-3971 ; 2523-3963
ISSN (online)	2523-3971
ISSN	2523-3963
DOI	10.1007/s42452-023-05389-6
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Article ; Online: Customer retention and churn prediction in the telecommunication industry

Sarkaft Saleh / Subrata Saha

SN Applied Sciences, Vol 5, Iss 7, Pp 1-

a case study on a Danish university

2023 Volume 13

Abstract: Abstract In this study, we explore the possible factors affecting churn in the Danish telecommunication industry and how those factors connect with retention strategies. The Danish telecommunication industry is experiencing a saturated market regarding ... ...

Abstract	Abstract In this study, we explore the possible factors affecting churn in the Danish telecommunication industry and how those factors connect with retention strategies. The Danish telecommunication industry is experiencing a saturated market regarding the number of customers, but the number of service providers has increased significantly in recent years. Due to the high costs of acquiring new customers, the telecommunication industry put great emphasis on retaining customers in such an intensely competitive industry. We employ five machine learning algorithms: random forest, AdaBoost, logistic regression, extreme gradient boosting classifier, and decision tree classifier on four datasets from two geographical regions, Denmark and the USA. The first three datasets are from online repositories, and the last one contains responses from 311 students from Aalborg University collected through a survey. We identify key features extracted by the best-performing algorithms based on five performance measures. Based on that, we aggregate all the features that appear important for each dataset. The results demonstrate that customers’ preferences are not aligned. Among the prominent drivers, we find that service quality, customer satisfaction, offering subscription plan upgrades, and network coverage are unique to the Danish student population. Telecommunication companies need to integrate the sociohistoric milieu of the Nordic countries to tailor their retention policies to different consumer cultures.
Keywords	Customer retention ; Churn prediction ; Classification algorithms ; Telecommunication ; Science ; Q ; Technology ; T
Subject code	380 ; 650
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	Springer
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Recycling of animal protein wastes in the formulation of feed for Labeo rohita and Mystus vittatus-a comparative evaluation.

Samaddar, Ayan / Kaviraj, Anilava / Nielsen, Izabela / Saha, Subrata

Tropical animal health and production

2024 Volume 56, Issue 2, Page(s) 93

Abstract: Lactic acid bacteria (LAB) are key players in the fermentation of organic wastes and their recycling as feedstuff for fish. Whey, a common dairy byproduct in India, is a cheap source of LAB and can be used to ferment animal byproducts. An experimental ... ...

Abstract	Lactic acid bacteria (LAB) are key players in the fermentation of organic wastes and their recycling as feedstuff for fish. Whey, a common dairy byproduct in India, is a cheap source of LAB and can be used to ferment animal byproducts. An experimental study was designed to explore whether the whey fermented animal protein blend (WFAPB) could be used as a fishmeal replacer in the formulation of feed for both stomach-less carp fish Labeo rohita and stomach-bearing catfish Mystus vittatus. Experiments were performed with five isoproteinous, isolipidous, and isoenergetic feeds with WFAPB replacing fishmeal (FM) by 0% (T1), 25% (T2), 50% (T3), 75% (T4), and 100% (T5). Fifteen days of laboratory experiments with these experimental feeds revealed that more than 50% FM replacement level could result in excess postprandial absorption (6 h) of some essential and non-essential amino acids in the plasma of both fish. The postprandial absorption was more in M. vittatus than L. rohita. Ninety-day experiments were conducted in outdoor cement vats to measure growths and deposition of amino acids (AA) in muscle. Regression analysis was performed to find the optimal FM replacement based on four growth parameters and fifteen AA deposition in muscle. A two-phase fuzzy methodology was used to obtain Pareto-optimal replacement levels for each fish. The results demonstrated that FM replacement levels were 7.63% and 36.79% respectively for L. rohita and M. vittatus when only four growth parameters were considered. However, based on the FM replacement level that maximized deposition of 15 amino acids and growth parameters, it was found that 12.23% and 40.02% replacement of FM by the WFAPB was ideal respectively for L. rohita and M. vittatus. The results revealed that only a fraction of both essential and non-essential amino acids absorbed in plasma could be converted into protein and deposited as bound amino acids in the muscle. It is concluded that fermentation by whey is an inexpensive, easily available, and environmentally sustainable technique to recycle animal protein in the formulation of feed for fish, and the stomach-bearing carnivorous fish are more efficient in utilizing fermented animal protein blend than the stomach-less carps.
MeSH term(s)	Animals ; Animal Feed/analysis ; Cyprinidae/metabolism ; Proteins/metabolism ; Carps ; Catfishes ; Amino Acids/metabolism
Chemical Substances	Proteins ; Amino Acids
Language	English
Publishing date	2024-03-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	603363-5
ISSN	1573-7438 ; 0049-4747
ISSN (online)	1573-7438
ISSN	0049-4747
DOI	10.1007/s11250-024-03910-6
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Book ; Conference proceedings: Papers presented at the 18th Southern Biomedical Engineering Conference and the 2nd International Conference on Ethical Issues in Biomedical Engineering

Saha, Subrata

[held at Clemson University in Clemson, South Carolina from May 21 - 23, 1999]

(Critical reviews in biomedical engineering ; 28,1/2)

2000

Event/congress	Southern Biomedical Engineering Conference (18, 1999, ClemsonSC) ; International Conference on Ethical Issues in Biomedical Engineering (2, 1999, ClemsonSC)
Author's details	[guest ed.: Subrata Saha]
Series title	Critical reviews in biomedical engineering ; 28,1/2
Collection
Language	English
Size	S. 1 - 347 : Ill., graph. Darst.
Publisher	Begell House
Publishing place	New York, NY
Publishing country	United States
Document type	Book ; Conference proceedings
HBZ-ID	HT012836249
Database	Catalogue ZB MED Medicine, Health

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Zs A 1104 -28-	not available for loan	Zeitschriften-Lesesaal

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Article ; Online: New Cyanostyrylcopillar[5]arene Derivative: Synthesis, Photophysical Study, Chromogenic Detection of Aliphatic Amines, and Biofilm-Antibiofilm Activity.

Dhara, Subrata Ranjan / Saha, Rajat / Baildya, Nabajyoti / Acharya, Kusumita / Bhattacharya, Arijit / Ghosh, Kumaresh

ACS applied materials & interfaces

2024 Volume 16, Issue 6, Page(s) 7275–7287

Abstract: The synthesis, characterization, and application of a new cyanostyrylcopillar[5] ... ...

Abstract	The synthesis, characterization, and application of a new cyanostyrylcopillar[5]arene
MeSH term(s)	Amines/pharmacology ; Amines/chemistry ; Crystallography, X-Ray ; X-Ray Diffraction ; Biofilms ; Anti-Bacterial Agents/chemistry
Chemical Substances	Amines ; Anti-Bacterial Agents
Language	English
Publishing date	2024-02-02
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.3c16248
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Transfer of chromium from environment to fish in East Kolkata wetlands - evaluation by structural equation modeling.

Ghosh, Debkanta / Saha, Samir Kumar / Kaviraj, Anilava / Saha, Subrata

Environmental monitoring and assessment

2023 Volume 195, Issue 12, Page(s) 1463

Abstract: Chromium (Cr) is a significant pollutant in the effluents from leather industries and domestic city sewage. Cr was determined in water, sediment, and different tissues (gill, muscle, intestine, liver, and kidney) of Nile tilapia, Oreochromis niloticus ... ...

Abstract	Chromium (Cr) is a significant pollutant in the effluents from leather industries and domestic city sewage. Cr was determined in water, sediment, and different tissues (gill, muscle, intestine, liver, and kidney) of Nile tilapia, Oreochromis niloticus harvested from wastewater-fed aquaculture (WFA) situated at Bamonghata, Bantala, Chowbaga and Chingrighata of East Kolkata Wetlands (EKW), a Ramsar site in West Bengal, India. The results showed that Cr concentration in surface water ranged between 0.05 to 0.15 mg/L, while Cr was detected at high concentration (100-300 mg/kg) in the sediment soil of the first three WFAs and in moderate concentration (50-110 mg/kg) in Chingrighata WFA. Average Cr concentrations in the tissues were ranked in the following sequence: kidney>liver>intestine>gill>muscle. However, the extent of accumulation of Cr in different tissues varied between the WFAs. We used Structural Equation Modeling (SEM) to determine the route of Cr transfer. The fitness of the model was evaluated by the performance measures. Cr accumulation pathways varied between the sites depending upon the level of Cr in water or sediment. Except for Bamonghata WFA, sediment was found as the principal source of accumulation of Cr in different tissues of O. niloticus. Cr refluxed from sediment into overlying water and accumulated in fish either through the food chain or through direct accumulation from water. In Bamonghata WFA, the role of sediment in the transfer of Cr could not be established due to the high water depth or biological non-availability of Cr in the sediment. It is concluded from this study that fish reared in the WFAs of EKW are still not hazardous in respect to Cr but require proper management to avoid the influx of Cr-containing effluents into the WFAs.
MeSH term(s)	Animals ; Latent Class Analysis ; Wetlands ; Environmental Monitoring ; Cichlids ; Chromium ; Water
Chemical Substances	Chromium (0R0008Q3JB) ; Water (059QF0KO0R)
Language	English
Publishing date	2023-11-13
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-023-12002-1
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Article ; Online: AI-enabled evaluation of genome-wide association relevance and polygenic risk score prediction in Alzheimer's disease.

Platt, Daniel E / Guzmán-Sáenz, Aldo / Bose, Aritra / Saha, Subrata / Utro, Filippo / Parida, Laxmi

iScience

2024 Volume 27, Issue 3, Page(s) 109209

Abstract: GWAS focuses on significance loosing false positives; machine learning probes sub-significant features relying on predictivity. Yet, these are far from orthogonal. We sought to explore how these inform each other in sub-genome-wide significant situations ...

Abstract	GWAS focuses on significance loosing false positives; machine learning probes sub-significant features relying on predictivity. Yet, these are far from orthogonal. We sought to explore how these inform each other in sub-genome-wide significant situations to define relevance for predictive features. We introduce the SVM-based RubricOE that selects heavily cross-validated feature sets, and LDpred2 PRS as a strong contrast to SVM, to explore significance and predictivity. Our Alzheimer's test case notoriously lacks strong genetic signals except for few very strong phenotype-SNP associations, which suits the problem we are exploring. We found that the most significant SNPs among ML and PRS-selected SNPs captured most of the predictivity, while weaker associations tend also to contribute weakly to predictivity. SNPs with weak associations tend not to contribute to predictivity, but deletion of these features does not injure it. Significance provides a ranking that helps identify weakly predictive features.
Language	English
Publishing date	2024-02-12
Publishing country	United States
Document type	Journal Article
ISSN	2589-0042
ISSN (online)	2589-0042
DOI	10.1016/j.isci.2024.109209
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Article ; Online: Design and development of a patient-specific temporomandibular joint implant: Probing the influence of bone condition on biomechanical response.

Banerjee, Anik / Basu, Bikramjit / Saha, Subrata / Chowdhury, Amit Roy

Journal of biomedical materials research. Part B, Applied biomaterials

2023 Volume 111, Issue 12, Page(s) 2089–2097

Abstract: Total temporomandibular joint (TMJ) replacement is widely recognized as an effective treatment for TMJ disorders. The long-term stability of TMJ implants depends on two important factors which are design concepts for fixation to anatomical locations in ... ...

Abstract	Total temporomandibular joint (TMJ) replacement is widely recognized as an effective treatment for TMJ disorders. The long-term stability of TMJ implants depends on two important factors which are design concepts for fixation to anatomical locations in the mandible and bone conditions. Other factors include stress distribution, microstrain in the peri-implant, bone attributes like bone conditions leading to the clinical complications and failures. This study addresses these limitations by examining the influence of patient-specific design concepts and bone conditions on TMJ implant performance. Clinical evidences support the importance of implant design on healing ability. Previous studies have focused on achieving precise implant fit based on geometric considerations, however those published studies did not explore the impact of such. Against this perspective, the present study reports the extensive finite element analysis (FEA) results, while analyzing the impact of a newly designed patient-specific TMJ implant to address clinical complications associated with various bone conditions, particularly osteoporotic bone. In validating the FEA results, the performance of additively manufactured patient-specific TMJ implants was compared with designs resembling two commonly used clinically approved implant designs. By addressing the limitations of previous research and emphasizing the importance of bone conditions, the study provides valuable guidelines for the development of next-generation TMJ implants. These findings contribute to enhanced clinical outcomes and long-term success in the treatment of TMJ disorders.
MeSH term(s)	Humans ; Temporomandibular Joint/surgery ; Joint Prosthesis ; Mandible ; Temporomandibular Joint Disorders/surgery ; Bone Diseases ; Finite Element Analysis ; Biomechanical Phenomena ; Stress, Mechanical
Language	English
Publishing date	2023-08-25
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2099992-6
ISSN	1552-4981 ; 1552-4973 ; 0021-9304
ISSN (online)	1552-4981
ISSN	1552-4973 ; 0021-9304
DOI	10.1002/jbm.b.35311
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Article: Evaluating the ergonomic deficiencies in computer workstations and investigating their correlation with reported musculoskeletal disorders and visual symptoms among computer users in Bangladeshi university.

Kibria, Md Golam / Parvez, Md Shohel / Saha, Palash / Talapatra, Subrata

Heliyon

2023 Volume 9, Issue 11, Page(s) e22179

Abstract: Nowadays, computer users are facing musculoskeletal disorders (MSDs) and visual symptoms. Prolonged sitting in inappropriate, awkward, and static postures on the computer workstation may cause musculoskeletal disorders (MSDs). Similarly, inappropriate ... ...

Abstract	Nowadays, computer users are facing musculoskeletal disorders (MSDs) and visual symptoms. Prolonged sitting in inappropriate, awkward, and static postures on the computer workstation may cause musculoskeletal disorders (MSDs). Similarly, inappropriate placement of monitors, illumination, and other factors such as prolonged usage of computers are related to visual symptoms. Objective: This study aims to evaluate the ergonomic deficiencies of computer workstations and their correlation with MSDs and visual symptoms. Methods: This study involved 271 university employees from a Bangladeshi engineering university. Ergonomic deficiencies were evaluated through direct observations and Occupational Safety and Health Administration checklists. In addition, the Nordic Musculoskeletal Questionnaire was used to assess the prevalence of MSDs and visual discomforts. Binary Logistic Regression (BLR) analysis was also used to examine the correlation between musculoskeletal symptoms and ergonomic deficiencies. Results: Results showed serious deficiencies in workstation setup, seating arrangement, monitor orientations, keyboard orientations, other input device orientations, and accessory setup. Employees reported that the MSDs in different body regions during the last 12 months including lower back (62 %), upper back (53 %), shoulders (47 %), and neck (25 %). Moreover, itchy eyes (69 %), tired eyes (83 %), and unclear vision (56.83 %) were the most common visual discomforts or visual symptoms among the participants. Results also revealed that monitor ergonomics and its orientation deficits were significantly associated with visual discomforts. Gender, job type, age, BMI, work experience, duration of computer work, and beak taking after 2 h were the independent variables reliably predicting the MSDs and visual symptoms. Conclusion: It is evident that MSDs and visual symptoms were associated with computer workstation deficiencies and other work-related factors.
Language	English
Publishing date	2023-11-10
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2023.e22179
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Article ; Online: Anthelmintic efficacy of Holarrhena pubescens against Raillietina spp. of domestic fowl through ultrastructural, histochemical, biochemical and GLCM analysis.

Saha, Rachita / Gupta, Manjil / Majumdar, Rima / Saha, Subrata / Kar, Pradip Kumar

PloS one

2023 Volume 18, Issue 9, Page(s) e0282033

Abstract: Globally, traditional knowledge systems are a powerhouse of information which can revolutionise the world, if decoded accurately and logically. Plant-based ethno-traditional and folklore curatives/medicines has a firm basis in the psyche of the common ... ...

Abstract	Globally, traditional knowledge systems are a powerhouse of information which can revolutionise the world, if decoded accurately and logically. Plant-based ethno-traditional and folklore curatives/medicines has a firm basis in the psyche of the common masses of West Bengal and Holarrhena pubescens is a representative example of it. This article communication on depicting the anthelmintic efficacy of ethanolic extract and Ethyl acetate fraction of the stem bark of Holarrhena pubescens against the cestode Raillietina spp. through efficacy studies, ultra-structural observations, histochemical and biochemical analysis on some tegumental enzymes i.e., Acid Phosphatase (AcPase), Alkaline Phosphatase (AlkPase), Adenosine Triphosphatase (ATPase) and 5'-Nucleotidase (5'-Nu) along with Gray Level Co-occurrence Matrix (GLCM) analysis of histochemical study. Praziquantel was used as the reference drug. Investigations revealed 10mg/ml dosage of crude extract was the most efficacious dose and amongst the fractions the ethyl acetate fraction showed the most anthelmintic property. Ultrastructural studies through Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) clearly depicted the damage in head, sucker, proglottids, proximal and distal cytoplasm (DC), microtriches (MT), basal lamina (BL), nuclear membrane (NM), and, nucleolus (NL) in the treated worms. Histochemical studies revealed decrease in staining intensity for all the tegumental enzymes in the treated worms compared to control. The GLCM analysis strongly supported the result of histochemical studies. Biochemical studies revealed marked reduction in enzyme activity in the treated worms with maximum reduction in the activity of 5'- Nu (77.8%) followed by ATPase (63.17%).
MeSH term(s)	Animals ; Holarrhena ; Poultry ; Anthelmintics/pharmacology ; Anti-Infective Agents ; Adenosine Triphosphatases ; Cestoda
Chemical Substances	ethyl acetate (76845O8NMZ) ; Anthelmintics ; Anti-Infective Agents ; Adenosine Triphosphatases (EC 3.6.1.-)
Language	English
Publishing date	2023-09-14
Publishing country	United States
Document type	Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0282033
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