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Mousavi SS, Mohammadpour A, Baghishani H. Hierarchical clustering with spatial adjacency constraints in heavy-tailed areal data. COMMUN STAT-SIMUL C 2023. [DOI: 10.1080/03610918.2023.2184761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Affiliation(s)
- Seyedeh Somayeh Mousavi
- Department of Statistics, Faculty of Mathematics and Computer Science, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Adel Mohammadpour
- Department of Statistics, Faculty of Mathematics and Computer Science, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Hossein Baghishani
- Department of Statistics, Faculty of Mathematical Sciences, Shahrood University of Technology, Shahrood, Iran
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Dugué N, Lamirel JC, Chen Y. Evaluating clustering quality using features salience: a promising approach. Neural Comput Appl 2021. [DOI: 10.1007/s00521-021-05942-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim Y, Yun SH, Koo H, Hwang S, Kim HJ, Lee S, Baek H, Kim HH, Lee KH, Kim JH, Park JI, Yoo KD. Different Seasonal Variations of Potassium in Hemodialysis Patients with High Longitudinal Potassium Levels: A Multicenter Cohort Study Using DialysisNet. Yonsei Med J 2021; 62:315-324. [PMID: 33779085 PMCID: PMC8007431 DOI: 10.3349/ymj.2021.62.4.315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 01/04/2021] [Accepted: 01/11/2021] [Indexed: 11/27/2022] Open
Abstract
PURPOSE To determine seasonal variations in serum potassium levels among hemodialysis patients. MATERIALS AND METHODS This was a multicenter cohort study of patients whounderwent hemodialysis and were registered in DialysisNet at our four associated general hospitals between January and December 2016. Month-to-month potassium variability was quantified as SD/√{n/(n-1)}, and a non-hierarchical method was used to cluster groups according to potassium trajectories. Seasonal variations in potassium levels were analyzed using a cosinor analysis. RESULTS The analysis was performed on 279 patients with a mean potassium level of 5.08±0.58 mmol/L. After clustering, 52.3% (n=146) of patients were included in the moderate group (K+, 4.6±0.4 mmol/L) and 47.7% (n=133) in the high group (K+, 5.6±0.4 mmol/L). The mean potassium level peaked in January in the moderate group (4.83±0.74 mmol/L) and in August in the high group (5.51±0.70 mmol/L). In the high potassium group, potassium levels were significantly higher in summer than in autumn (p<0.001) and spring (p=0.007). Month-to-month potassium variability was greater in the high group than in the moderate group (0.59±0.19 mmol/L vs. 0.52±0.21 mmol/L, respectively, p=0.012). Compared to patients in the first quartile of potassium variability (≤0.395 mmol/L), those with higher variability (2nd-4th quartiles) were 2.8-4.2 fold more likely to be in the high potassium group. CONCLUSION Different seasonal patterns of serum potassium were identified in the moderate and high potassium groups, with potassium levels being significantly higher in the summer season in the high potassium group and in winter for the moderate potassium group.
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Affiliation(s)
- Yunmi Kim
- Department of Internal Medicine, Inje University Busan Paik Hospital, Busan, Korea
| | - Seong Han Yun
- Department of Nephrology, Changwon Fatima Hospital, Changwon, Korea
| | - Hoseok Koo
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Subin Hwang
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Hyo Jin Kim
- Department of Internal Medicine, Pusan National University Hospital, Busan, Korea
| | - Sunhwa Lee
- Department of Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Hyunjeong Baek
- Department of Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Hye Hyeon Kim
- Department of Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul, Korea
| | - Kye Hwa Lee
- Department of Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul, Korea
| | - Ju Han Kim
- Department of Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul, Korea
| | - Ji In Park
- Department of Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea.
| | - Kyung Don Yoo
- Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
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Licen S, Di Gilio A, Palmisani J, Petraccone S, de Gennaro G, Barbieri P. Pattern Recognition and Anomaly Detection by Self-Organizing Maps in a Multi Month E-nose Survey at an Industrial Site. SENSORS 2020; 20:s20071887. [PMID: 32235302 PMCID: PMC7180849 DOI: 10.3390/s20071887] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/21/2020] [Accepted: 03/23/2020] [Indexed: 11/29/2022]
Abstract
Currently people are aware of the risk related to pollution exposure. Thus odor annoyances are considered a warning about the possible presence of toxic volatile compounds. Malodor often generates immediate alarm among citizens, and electronic noses are convenient instruments to detect mixture of odorant compounds with high monitoring frequency. In this paper we present a study on pattern recognition on ambient air composition in proximity of a gas and oil pretreatment plant by elaboration of data from an electronic nose implementing 10 metal-oxide-semiconductor (MOS) sensors and positioned outdoor continuously during three months. A total of 80,017 e-nose vectors have been elaborated applying the self-organizing map (SOM) algorithm and then k-means clustering on SOM outputs on the whole data set evidencing an anomalous data cluster. Retaining data characterized by dynamic responses of the multisensory system, a SOM with 264 recurrent sensor responses to air mixture sampled at the site and four main air type profiles (clusters) have been identified. One of this sensor profiles has been related to the odor fugitive emissions of the plant, by using ancillary data from a total volatile organic compound (VOC) detector and wind speed and direction data. The overall and daily cluster frequencies have been evaluated, allowing us to identify the daily duration of presence at the monitoring site of air related to industrial emissions. The refined model allowed us to confirm the anomaly detection of the sensor responses.
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Affiliation(s)
- Sabina Licen
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy;
| | - Alessia Di Gilio
- Department of Biology, University of Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy; (J.P.); (S.P.); (G.d.G.)
- Correspondence: (A.D.G.); (P.B.)
| | - Jolanda Palmisani
- Department of Biology, University of Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy; (J.P.); (S.P.); (G.d.G.)
| | - Stefania Petraccone
- Department of Biology, University of Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy; (J.P.); (S.P.); (G.d.G.)
| | - Gianluigi de Gennaro
- Department of Biology, University of Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy; (J.P.); (S.P.); (G.d.G.)
| | - Pierluigi Barbieri
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy;
- Correspondence: (A.D.G.); (P.B.)
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Clustering genomic words in human DNA using peaks and trends of distributions. ADV DATA ANAL CLASSI 2019. [DOI: 10.1007/s11634-019-00362-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Lamela D, Jongenelen I, Pinto R, Levendosky A. Typologies of intimate partner violence-maternal parenting and children's externalizing problems: The moderating effect of the exposure to other forms of family violence. CHILD ABUSE & NEGLECT 2018; 81:60-73. [PMID: 29723700 DOI: 10.1016/j.chiabu.2018.04.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 04/22/2018] [Accepted: 04/24/2018] [Indexed: 06/08/2023]
Abstract
Typologies of IPV and parenting practices in mothers who experienced police-reported IPV remain surprisingly unexplored, in addition to how those typologies are linked with children's externalizing problems. Using data from 162 Portuguese mother-child dyads with a police or child protection services referral of IPV, this study aimed to: (a) identify IPV-parenting typologies; (b) test the associations between typologies and children's externalizing problems, and (c) examine the moderating effect of children's exposure to other forms of family violence in those associations. Using a person-centered approach, two IPV-parenting typologies were found: a spillover typology, with high levels of physical, psychological, and sexual violence and high levels of harsh and inconsistent parenting practices; and a compartmentalized typology, with high levels of physical, psychological, and sexual violence and lower ineffective parenting practices. Results also showed that externalizing symptoms (reported by mothers and teachers) were significantly lower in children of mothers in the compartmentalized typology compared to those in the spillover typology. Children's direct exposure to other forms of family violence moderated this association. Findings suggested that children with a high exposure to other forms of family violence showed the highest levels of externalizing problems when their mothers were classified into the spillover typology, and they exhibited the lowest levels of externalizing problems when their mothers were classified in the compartmentalized typology.
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Seidpisheh M, Mohammadpour A. Hierarchical clustering of heavy-tailed data using a new similarity measure. INTELL DATA ANAL 2018. [DOI: 10.3233/ida-173371] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Mohammad Seidpisheh
- Department of Statistics, Faculty of Mathematical Sciences and Computer, Allameh Tabataba’i University, Tehran, Iran
| | - Adel Mohammadpour
- Department of Statistics, Faculty of Mathematics and Computer Science, Amirkabir University of Technology, Tehran, Iran
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Große Ruse M, Hasselquist D, Hansson B, Tarka M, Sandsten M. Automated analysis of song structure in complex birdsongs. Anim Behav 2016. [DOI: 10.1016/j.anbehav.2015.11.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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