scholarly journals A Meta-heuristic Density-Based Subspace Clustering Algorithm for High Dimensional Data

2021 ◽  
Author(s):  
Parul Agarwal ◽  
Shikha Mehta ◽  
Ajith Abraham
Keyword(s):  
Clustering Algorithm ◽  
Clustering Algorithms ◽  
Subspace Clustering ◽  
High Dimensional ◽  
Rank Test ◽  
Test Results ◽  
Dbscan Algorithm ◽  
Signed Rank ◽  
Subspace Algorithms ◽  
Signed Rank Test

Abstract Subspace clustering is one of the efficient techniques for determining the clusters in different subsets of dimensions. Ideally, these techniques should find all possible non-redundant clusters in which the data point participates. Unfortunately, existing hard subspace clustering algorithms fail to satisfy this property. Additionally, with the increase in dimensions of data, classical subspace algorithms become inefficient. This work presents a new density-based subspace clustering algorithm (S_FAD) to overcome the drawbacks of classical algorithms. S_FAD is based on a bottom-up approach and finds subspace clusters of varied density using different parameters of the DBSCAN algorithm. The algorithm optimizes parameters of the DBCAN algorithm through a hybrid meta-heuristic algorithm and uses hashing concepts to discover all non-redundant subspace clusters. The efficacy of S_FAD is evaluated against various existing subspace clustering algorithms on artificial and real datasets in terms of F_Score and rand_index. Performance is assessed based on three parameters: average ranking, SRR ranking, and scalability on varied dimensions. Statistical analysis is performed through the Wilcoxon signed-rank test. Results reveal that S_FAD performs considerably better on the majority of the datasets and scales well up to 6400 dimensions on the actual dataset.

scholarly journals An Enhanced Spectral Clustering Algorithm with S-Distance

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 596
Author(s):  
Krishna Kumar Sharma ◽  
Ayan Seal ◽  
Enrique Herrera-Viedma ◽  
Ondrej Krejcar
Keyword(s):  
Spectral Clustering ◽  
Clustering Algorithm ◽  
Spatial Clustering ◽  
Clustering Algorithms ◽  
Rank Test ◽  
Customer Churn ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Spectral Clustering Algorithm ◽  
Industrial Databases

Calculating and monitoring customer churn metrics is important for companies to retain customers and earn more profit in business. In this study, a churn prediction framework is developed by modified spectral clustering (SC). However, the similarity measure plays an imperative role in clustering for predicting churn with better accuracy by analyzing industrial data. The linear Euclidean distance in the traditional SC is replaced by the non-linear S-distance (Sd). The Sd is deduced from the concept of S-divergence (SD). Several characteristics of Sd are discussed in this work. Assays are conducted to endorse the proposed clustering algorithm on four synthetics, eight UCI, two industrial databases and one telecommunications database related to customer churn. Three existing clustering algorithms—k-means, density-based spatial clustering of applications with noise and conventional SC—are also implemented on the above-mentioned 15 databases. The empirical outcomes show that the proposed clustering algorithm beats three existing clustering algorithms in terms of its Jaccard index, f-score, recall, precision and accuracy. Finally, we also test the significance of the clustering results by the Wilcoxon’s signed-rank test, Wilcoxon’s rank-sum test, and sign tests. The relative study shows that the outcomes of the proposed algorithm are interesting, especially in the case of clusters of arbitrary shape.

scholarly journals The effect of 8-week thera-band exercises on male swimmers’ 100 m freestyle swimming performance

2017 ◽  
Vol 14 (4) ◽  
pp. 3950 ◽  
Author(s):  
Ahmet Gönener ◽  
Utku Gönener ◽  
Ozan Yılmaz ◽  
Tuğçe Horoz ◽  
Deniz Demirci
Keyword(s):  
Swimming Performance ◽  
Training Programme ◽  
Rank Test ◽  
Control Group ◽  
Study Group ◽  
Test Results ◽  
Signed Rank ◽  
Post Test ◽  
Signed Rank Test ◽  
And Control

The aim of this study is to investigate 8 weeks Thera-Band trainings' effects on male swimmers' 100 m freestyle swimming performance.The study group is created by 20 (n = 20) licenced male athletes that had trained at least 3 days in a week and have been active in swimming sport at least 3 years in Gebze Genclerbirligi Swimming Club 20 (n = 20). Athletes were divided into experiment group (n = 10) and control group (n = 10) randomly. Training programme was applied to the study group for 55-60 minutes for 3 days on alternate days and times when the club does not have swimming training. 12 different Thera-Band trainings were applied for 40-45 mins and each set was 15 minutes.Mann-Whitney U test was used to analyze differences between groups and Wilcoxon signed rank test was applied for analyzing the differences of intra-groups. SPSS 21.0 Statistics package software was used for statistical analyzes. The results show that there are no significantly differences between experimental group's and control group's post test results. (p>0.05). Statistically significant differences are found as a result of intra-group comparison of the experimental group's pre-test and post-test results (p<0.05).Depending on the results obtained after reviewing the literature, it can be concluded that Thera-Band training is effective on the performance improvement of swimmers aged 13-15 years.

Efficacy of the “Cooperative Assessment” Diagnostic Procedure to Early Improve Acute Symptoms in a Sample of Adolescents with Anxiety and Mood Disorders

2017 ◽  
Vol 41 (S1) ◽  
pp. S122-S123
Author(s):  
M. Biagiarelli ◽  
M. Curto ◽  
M.P. Andraos ◽  
V. Aprile ◽  
S. Pelaccia ◽  
...  
Keyword(s):  
Mood Disorders ◽  
Repeated Measures ◽  
Poor Mental Health ◽  
Rank Test ◽  
Therapeutic Assessment ◽  
Test Results ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Competing Interest

IntroductionAnxiety and mood disorders are common in adolescence and predict poor mental health outcomes and low quality of life in adulthood. Although early intervention seems to be critical, dropouts in the early stages of treatment are frequent and associated with low insight and severe symptoms. Therefore, a diagnostic assessment phase aimed to increase insight and early reduce symptoms appears to be essential in adolescents.ObjectivesThe objective of this study is to demonstrate that the diagnostic method Cooperative Assessment is able to early reduce symptoms in adolescents with anxiety and mood disorders.MethodsA sample of 88 patients, aged 14–19 years were included. All were recruited at the first visit and evaluated with the Cooperative Assessment. This manualized procedure was created from principles of collaborative and therapeutic assessment and aim to involve the patient in a co-developed diagnosis thorough the collaborative use of test results. Patients were evaluated before (T0), in the middle (T1) and after (T2) the assessment using CGI, GAF, HAM-A, HAM-D and MRS scales.ResultsEighty-eight adolescents, 56.8% females, diagnosed with anxiety (47.7%) and mood disorders (52.3%) completed the protocol. HAM-A, HAM-D, MRS, CGI and GAF significantly improved at T1 and T2 with respect to T0 (T0: HAM-A 17.31 ± 8.22; HAM-D 16.97 ± 8.37; MRS5.78 ± 6.17; GAF 59.3 ± 11.06; CGI 3.63 ± 1.35; T2: HAM-A 11.41 ± 6.82; HAM-D 11.1 ± 6.91; MRS3.82 ± 3.87; GAF 67.5 ± 10.76; CGI 3.03 ± 1.26; P < 0.001; Wilcoxon signed-rank test for repeated measures).ConclusionsCooperative assessment is able to early improve symptoms in adolescents with mood and anxiety disorders.Disclosure of interestThe authors have not supplied their declaration of competing interest.

The Effect of Breast Treatment and Oxytocin Massage on the Production of Breast Milk

2020 ◽  
Vol 17 (7) ◽  
pp. 3047-3052
Author(s):  
Ganis Amaliasari ◽  
Harmayetty ◽  
Retnayu Pradanie
Keyword(s):  
Breast Milk ◽  
Milk Production ◽  
Comparison Group ◽  
Post Partum ◽  
Rank Test ◽  
Test Results ◽  
Breast Milk Production ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Breast Care

Breastfeeding is a normal process following childbirth. However, post partum mothers often complain several problems during breastfeeding. A problem that is often complained of by post partum mothers is the lack of breast milk supply. The lack of breast milk production will interfere with the process of breastfeeding, which is one of the causing factors as to why certain mothers do not exclusively breastfeed. To find out the effect of breast care and oxytocin massage on increasing milk production in post partum mothers. This research uses a quasi-experimental design. The population in this study were all primiparous post partum mothers with lactation period of 0-7 days. A total of 20 mothers participated in this study and was divided into two groups namely the treatment group and the comparison group. The samples were obtained using purposive sampling. There are independent variables (breast care and oxytocin massage) and dependent variables (milk production). Data collection was performed using a questionnaire, then analyzed using the test Wilcoxon Signed Rank Test and Mann Whitney Test. Wilcoxon Signed Rank Test Results of breast milk production of (p = 0.003) in the treatment group, while in the comparison group the breast milk production was (p = 0.014). The Mann Whitney Test results show that p = 0.004. It can be concluded that breast care and oxytocin massage effectively increase the milk production of post partum mothers. The therapy is recommended for health professionals to apply breast care and oxytocin massage to increase the milk production of post partum mothers who have less milk production. Combination of breast care and oxytocin massage have more effective benefits in increasing the breast milk production of postpartum mothers.

scholarly journals Comparing QuantiFERON-TB Gold Plus with Other Tests To Diagnose Mycobacterium tuberculosis Infection

2019 ◽  
Vol 57 (11) ◽  
Author(s):  
Thara K. Venkatappa ◽  
Rose Punnoose ◽  
Dolly J. Katz ◽  
Michael P. Higgins ◽  
Niaz Banaei ◽  
...  
Keyword(s):  
Latent Tuberculosis ◽  
Epidemiologic Studies ◽  
Tuberculosis Infection ◽  
Fourth Generation ◽  
Rank Test ◽  
Test Results ◽  
Mycobacterium Tuberculosis Infection ◽  
Negative Results ◽  
Signed Rank ◽  
Signed Rank Test

ABSTRACT The fourth-generation QuantiFERON test for tuberculosis infection, QuantiFERON-TB Gold Plus (QFT-Plus) has replaced the earlier version, QuantiFERON-TB Gold In-Tube (QFT-GIT). A clinical need exists for information about agreement between QFT-Plus and other tests. We conducted this study to assess agreement of test results for QFT-Plus with those of QuantiFERON-TB Gold In-Tube (QFT-GIT), T-SPOT.TB (T-SPOT), and the tuberculin skin test (TST). Persons at high risk of latent tuberculosis infection (LTBI) and/or progression to tuberculosis (TB) disease were enrolled at the 10 sites of the Tuberculosis Epidemiologic Studies Consortium from October 2016 through May 2017; each participant received all four tests. Cohen’s kappa (κ) and Wilcoxon signed-rank test compared qualitative and quantitative results of QFT-Plus with the other tests. Test results for 506 participants showed 94% agreement between QFT-Plus and QFT-GIT, with 19% positive and 75% negative results. When the tests disagreed, it was most often in the direction of QFT-GIT negative/QFT-Plus positive. QFT-Plus had similar concordance as QFT-GIT with TST (77% and 77%, respectively) and T-SPOT (92% and 91%, respectively). The study showed high agreement between QFT-GIT and QFT-Plus in a direct comparison. Both tests had similar agreement with TST and T-SPOT.

scholarly journals REDUKSI MISKONSEPSI ASAM BASA MELALUI INKUIRI TERBUKA DAN STRATEGI CONCEPTUAL CHANGE

2017 ◽  
Vol 3 (1) ◽  
pp. 286
Author(s):  
Ahmad Ahmad ◽  
Suyono Suyono ◽  
Leny Yuanita
Keyword(s):  
Critical Thinking ◽  
Conceptual Change ◽  
Inquiry Learning ◽  
T Test ◽  
Rank Test ◽  
Test Results ◽  
Signed Rank ◽  
Significant Difference ◽  
Before And After ◽  
Signed Rank Test

This research aims to study the effect of inquiry learning by critical thinking practice followed by a conceptual change efforts to reduce misconceptions on acid-base learn. The research design using one-group pretest-posttest design with students of SMAN 2 Ngawi as sample research. The student conception  status finding by knowing concept (TK), not knowing concept (TTK), and misconception (MK), whereas intensity of misconception be analized by CRI. Results and analysis of research data found that there is a shift in conception after inquiry learning p rocess. Based on Wilcoxon’s signed rank test, the T value of test TK, TTK, and MK is less than T table at α = 0.05 , so it was concluded that inquiry learning increase TK and decrease TTK and MK. The influence of inquiry learning for understanding the influence was strengthened by the results of the t test tests before and after understanding the concept of inquiry learning that indicate a significant difference.  t-test results on tests of critical thinking before and after the inquiry learning also showed a significant difference. Inquiry learning can not reduce all of misconceptions. Reduction step again is with conceptual change. Based on Wilcoxon’s signed rank test was concluded that conceptual change learning can reduce misconception significantlyPenelitian ini bertujuan mempelajari pengaruh pembelajaran inkuiri terbuka disertai latihan berpikir kritis yang dilanjutkan dengan conceptual change sebagai upaya mereduksi miskonsepsi pada materi asam basa. Penelitian eksperimen semu ini menggunakan metode one group pretest-postest design dengan subyek penelitian  siswa kelas XI SMA Negeri 2 Ngawi. Profil konsepsi siswa dinyatakan dengan status tahu konsep (TK), tidak tahu konsep (TTK), dan miskonsepsi (MK), sedangkan intensitas miskonsepsi diperoleh dari hasil analisis CRI jawaban siswa.  Hasil dan analisis hasil tes pemahaman konsep menemukan bahwa terjadi pergeseran konsepsi setelah proses pembelajaran inkuiri terbuka. Berdasarkan wilcoxon’s signed rank test diperoleh T hitung untuk semua status TK, TTK, dan MK kurang dari nilai T tabel pada α = 0,05 dan n = 25, sehingga   disimpulkan bahwa pembelajaran inkuiri meningkatkan jumlah TK dan menurunkan TTK dan MK.  Pengaruh pembelajaran inkuiri terhadap pemahaman konsep serta kemampuan berpikir kritis diketahui dari uji t hasil tes pemahaman konsep serta tes berpikir kritis sebelum dan setelah pembelajaran. Hasil uji t pada α = 0,05 menunjukkan adanya perbedaan signifikan pemahaman konsep serta kemampuan berpikir kritis antara sebelum dan setelah pembelajaran inkuiri. Miskonsepsi yang masih tersisa setelah pembelajaran inkuiri direduksi kembali dengan strategi   conceptual change. Berdasarkan wilcoxon’s signed rangk test disimpulkan bahwa pembelajaran conceptual change dapat mereduksi miskonsepsi secara signifikan.

scholarly journals Effectiveness of surgical management of malignant glaucoma in phakic eyes

2022 ◽  
Vol 15 (1) ◽  
pp. 65-70
Author(s):  
Qi-Wei Wang ◽  
◽  
Xiao-Shan Lin ◽  
Wan Chen ◽  
Qiao-Lin Zhu ◽  
...  
Keyword(s):  
Anterior Chamber Depth ◽  
Case Series ◽  
Rank Test ◽  
Test Results ◽  
Iol Implantation ◽  
Signed Rank ◽  
Malignant Glaucoma ◽  
Long Time ◽  
Signed Rank Test ◽  
Phakic Eyes

AIM: To assess the effectiveness of core vitrectomy-phacoemulsification-intraocular lens (IOL) implantation-capsulo-hyaloidotomy in treating phakic eye at least 1mo after the onset of malignant glaucoma. METHODS: A retrospective analysis were performed on malignant glaucoma patients treated in Zhongshan Ophthalmic Center between 2016 and 2018. Demographic and clinical data were described. The preoperative and postoperative visual acuity (VA), intraocular pressure (IOP), number of IOP-lowering medications used, and anterior chamber depth (ACD) of the case series were compared by Wilcoxon signed-rank test. RESULTS: Thirteen phakic eyes with long time intervals between onset and surgery were identified in this case series. Core vitrectomy-phacoemulsification-IOL implantation-capsulo-hyaloidotomy reduced the IOP (P=0.046) and the number of IOP-lowering medications used (P=0.004), deepened the ACD (P=0.005). Complete success was achieved in 38.5% of the eyes, and anatomical success was achieved in 100% of the eyes without any recurrence. The only postoperative complication observed is corneal endothelial decompensation. It occurred in two cases. CONCLUSION: Core vitrectomy-phacoemulsification-IOL implantation-capsulo-hyaloidotomy is safe and effective for treatment of long onset phakic malignant glaucoma.

Pengaruh Pelatihan Pertolongan Pertama Pada Kecelakaan (P3K) Terhadap Tingkat Pengetahuan Siswi Kelas X Tentang Pertologan Pertama Pada Kecelakaan

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Mohamad Mursid ◽  
Maslichah Maslichah
Keyword(s):  
Health Workers ◽  
First Aid ◽  
Rank Test ◽  
Test Results ◽  
Student Knowledge ◽  
Signed Rank ◽  
Post Test ◽  
Signed Rank Test ◽  
Experimental Subjects ◽  
The Given

ABSTRAKSiap siaga merupakan landasan bagi setiap orang untuk melakukan pertolongan pertama pada kecelakaan. Dengan melalui pendidikan baik pengajaran atau pelatihan yang diberikan oleh suatu lembaga atau perseorangan dapat berpengaruh terhadap kemampuan atuapun skill yang dimiliki oleh seseorang.Tujuan dari penelitian ini untuk mengetahui pengaruh pelatihan pertolongan pertama pada kecelakaan terhadap tingkat pengetahuan siswi MA Al Rosyid Kabupaten Bojonegoro.Jenis penelitian adalah pra eksperimental. Subjek penelitian adalah siswi kelas X MA Al Rosyid sejumlah 34 responden dimana sebelum diberikan pelatihan dilakukan pre test terlebih dahulu setelah itu diberikan intervensi dan selanjutnya dilakuakan post test. Analisis yang digunakan uji wilcoxon signed rank-test.Hasil Penelitian menunjukan bahwa sebelum diberikan pelatihan tentang pertolongan pertama pada kecelakaan (P3K), mayoritas responden berpengetahuan kurang sebanyak 20 responden (58,82%), sesudah diberikan pelatihan lebih dari sebagian responden berpengetahuan baik sebanyak 23 responden (67,64%). Hasil  uji Wilcoxon Signed Ranks Test didapatkan hasil Sig. 0,000 lebih kecil dari p = 0,05.Pelatihan pertolongan pertama pada kecelakaan berpengaruh terhadap tingkat pengetahuan siswi dalam menangani korban kecelakaan dengan benar sehingga perlu bagi tenaga kesehatan untuk ikut serta dalam memberikan pendidikan kesehatan lebih lanjut. Kata Kunci : Pertolongan Pertama Pada Kecelakaan (P3K), Pengetahuan   ABSTRACTAlert is a platform for everyone to do first aid. With a good education through teaching or training provided by an institution or individual can affect the ability atuapun skills possessed by seseorang. Purpose of this study was to determine the effect of training in first aid on the level of student knowledge MA Al Rosyid Bojonegoro.This type of research is pre-experimental. Subjects were students of class X MA Al Rosyid number of 34 respondents which are given training before the first pre-test conducted after the given intervention and subsequent dilakuakan post test. The analysis used Wilcoxon signed rank test-test.Research shows that before being given training in first aid (P3K), the majority of respondents are knowledgeable about as many as 20 respondents (58.82%), after the training given over most knowledgeable respondents either as many as 23 respondents (67.64%). Results Wilcoxon Signed Ranks Test results obtained Sig. 0.000 of p = 0.05.Training first at the accident affect the level of student knowledge in dealing with victims of accidents properly so the need for health workers to participate sertadalam provide more health education. Keywords: First Aid (P3K), Knowledge

scholarly journals Comparison of Peak Aerobic Capacity Between the Treadmill and a Skiing Ergometer

2021 ◽  
Vol 4 (3) ◽  
Author(s):  
Hannah Nelson ◽  
Andy Bosak ◽  
Russell Lowell ◽  
Maggie McDermott ◽  
Branden Ziebell ◽  
...  
Keyword(s):  
Rank Test ◽  
Fitness Testing ◽  
Test Results ◽  
Alternative Mode ◽  
Paired Samples ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Ideal Tool ◽  
Peak Aerobic Capacity ◽  
Total Body

Introduction: The Concept2 SkiErg is increasing in popularity and is widely used to provide a low impact total body workout. Because of these benefits, the SkiErg could be an ideal tool for fitness testing. Therefore, the purpose of this study was to compare VO2peak values elicited from a treadmill (TM) and SkiErg (SE) graded exercise test (GXT). Methods: Twenty-two averagely fit females completed 2 GXT protocols to volitional exhaustion on a TM and SE. Peak VO2, HR, VE, TTE, and RER were compared using paired-samples t-tests with significant differences at p≤0.05. Max RPE was compared using a Wilcoxon Signed Rank Test. Results: TM was significantly greater than SE for VO2peak (43.82±1.07 vs 33.97±5.01 ml/kg/min, p<0.01), HR (189±8 vs 182±11 bpm, p<0.01), RPE (18.91+1.11vs 17.26+2.03, p=0.02), VE (95.44±11.26 vs 86.21±2.90 L/min, p=0.015), and TTE (550.16+137.56 vs 391.86±81.20 sec, p<0.01). RER was significantly greater on the SE (1.16±0.08 vs 1.12±0.06, p=0.024). Conclusion: Results suggest that TM elicits higher max values for VO2, HR, TTE, VE, and RPE compared to SE, while SE elicits a higher RER in the current population. SE could be used as an alternative mode of testing in averagely-fit females but does not directly compare to TM values.

scholarly journals Subspace Clustering of High-Dimensional Data: An Evolutionary Approach

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Singh Vijendra ◽  
Sahoo Laxman
Keyword(s):  
Clustering Algorithm ◽  
Dimensional Space ◽  
Clustering Algorithms ◽  
High Dimensional Data ◽  
Subspace Clustering ◽  
High Dimensional ◽  
Data Sets ◽  
Real World Data ◽  
Data Set ◽  
Data Points

Clustering high-dimensional data has been a major challenge due to the inherent sparsity of the points. Most existing clustering algorithms become substantially inefficient if the required similarity measure is computed between data points in the full-dimensional space. In this paper, we have presented a robust multi objective subspace clustering (MOSCL) algorithm for the challenging problem of high-dimensional clustering. The first phase of MOSCL performs subspace relevance analysis by detecting dense and sparse regions with their locations in data set. After detection of dense regions it eliminates outliers. MOSCL discovers subspaces in dense regions of data set and produces subspace clusters. In thorough experiments on synthetic and real-world data sets, we demonstrate that MOSCL for subspace clustering is superior to PROCLUS clustering algorithm. Additionally we investigate the effects of first phase for detecting dense regions on the results of subspace clustering. Our results indicate that removing outliers improves the accuracy of subspace clustering. The clustering results are validated by clustering error (CE) distance on various data sets. MOSCL can discover the clusters in all subspaces with high quality, and the efficiency of MOSCL outperforms PROCLUS.

Sign in / Sign up

Export Citation Format

Share Document