bluuebunny/crossref_metadata_2025_split huggingface dataset:
Early clinical outcome after right anterolateral thoracotomy as an alternative for median sternotomy for mitral valve replacement
Authors: Attallah Ahmed Rady , Al-Elwany Shady Eid , Ayyad Mohammed A.K. Salama , Abdelwahab Ali Mohammed 
Published: May 2020

Background: The advantages of the right anterolateral thoracotomy (RALT) approach for mitral valve surgery over standard median sternotomy (MS) are still debatable. The objective of this study was to evaluate and compare the postoperative clinical outcome after RALT and MS for mitral valve replacement.
Methods: This prospective observational study included 40 patients who underwent mitral valve replacement between January 2016 and August 2018. Patients were assigned to two groups, the first group included 20 patients who had conventional median sternotomy approach and the second group included 20 patients who had right anterolateral thoracotomy with the complete cannulation and aortic cross-clamping conducted through the same incision.
Results: In comparison to MS, RALT had significantly higher cross-clamp time (77.7±16.1 vs 45.8±8.7 minutes, P < 0.01), total bypass time (105.2±12.7 vs 72.2±10.4 minutes, P < 0.01), and total operative time (287±41 vs 231±36 min, P < 0.01), in addition to significantly lower ventilation time (4.2±1.51 vs 6.1±1.84 hours, P < 0.01), blood loss (229±85 vs 335±137 ml), amount of blood transfusion (1.41±0.6 vs 2.19±1.1 units, P < 0.01), ICU stay duration (2.11±0.49 vs 2.78±0.82 days, P < 0.01), pain scores at 1st and 2nd postoperative days (5.67±0.79 vs 7.81±0.53, p < 0.01), and total hospital stay duration (7.2±1.3 vs 8.4±1.6 days, P = 0.01). Patients' satisfaction about their wound was significantly higher in RALT group compared to MS group (95% vs 30%, P < 0.01).
Conclusion: The RALT approach for mitral valve surgery could be a safe and effective approach when compared to median sternotomy. RALT could be associated with a reduction of blood loss, blood transfusion, wound infection, in addition to shorter ICU and hospital stay.
Single versus bilateral chordo-papillary apparatus preservation in mitral valve replacement: a hemodynamic study
Authors: Shalaby Mostafa Alaaeldin Abdelfatah , Abd el.Moaty Haytham Mohamed , Mahmoud Mohamed Hossiny , Abdallah Mohamed S H 
Published: May 2020

Background: It has been postulated that disruption of the mitral valve apparatus at the time of mitral valve replacement (MVR) is a risk factor for postoperative ventricular dysfunction. The aim of this study was to evaluate the effect of single versus bilateral chordo-papillary preservation on the left ventricular function in comparison to no preservation.
Methods: This study was conducted from 2015 to 2018 on sixty patients who had MVR. The patients were classified into group I included 20 patients who underwent MVR with complete excision of the subvalvular chordae and tips of papillary muscles, group II: included 20 patients who underwent MVR with preservation of posterior chordo-papillary apparatus, and group III: included 20 patients who underwent MVR with preservation of both posterior and anterior chordo-papillary apparatus.
Results: There were 20 males (33.3%), and the mean age was 48.76± 8.91 years. Patients in group III were significantly older (37.15 ±4.92, 39.8 ± 5.49, and 57.25 ± 6.93 years in groups I, II, and III, respectively; p< 0.001). The left ventricular end-diastolic (5.40 ±0.34, 4.96 ± 0.43, and 4.44 ± 0.55 mm in group I, II and III, respectively, p<0.001) and end-systolic diameter (4.33 ±0.48, 3.58 ±0.43 and 3.20 ±0.43 mm in group I, II and III; respectively, p<0.001) were significantly reduced in partial and complete preservation groups after 6 months. Left ventricular ejection fraction improved in the bilateral preservation and partial preservation groups after 6 months (45.32 ±9.78, 56.79 ±10.14, and 56.60 ±11.68 % in groups I, II and III respectively, p<0.001). Mechanical ventilation was significantly longer in group I (24.10 ± 6.6, 16.80 ± 5.97, and 15.80 ± 5.24 hours in groups I, II and III, respectively, p<0.001) and the duration of ICU stay was significantly longer in group I (78.65 ± 15.32, 65.40 ± 14.21, and 60.20 ± 12.58 hours in groups I, II and III, respectively, p<0.001).
Conclusion: Preservation of the annulo-papillary continuity may preserve left ventricular geometry and performance. Total preservation of chordae could be superior to partial preservation with better left ventricular remodeling and improvement in the left ventricular functions.
Central extracorporeal membrane oxygenation as a bridge to recovery in patients with myocardial stunning after coronary artery bypass grafting
Authors: Fouly Mohamed Abdel 
Published: May 2020

Background: The role of central extracorporeal membrane oxygenation (ECMO) post coronary artery bypass grafting (CABG) in older patients is debatable. The objectives of our study were to investigate the role of central veno-arterial (V-A) ECMO as a bridge to recovery in patients with myocardial stunning after CABG and its effect on mortality in this group of patients.
Methods: Seventy-five patients had central ECMO as a bridge to recovery after CABG because of myocardial stunning; 45 of them (60%) had survived (group 1), and mortality occurred in 30 patients (40%) (group 2). Preoperative risk factors such as hypertension, stroke, and renal failure were comparable between groups. In non-survivors, left main disease was more common (19 (63.3%) vs. 13 (28.9%); p= 0.003) and SYNTAX score was higher (Median 33 (25th- 75th percentiles); 33 (29- 35) vs. 26 (25- 32); p< 0.001).
Results: Cross-clamp time was shorter in group 1 (58 minutes; (52-62) vs 115.5 minutes; (84- 161) in group 2; p< 0.001). Cardiopulmonary bypass time was shorter in group 1 compared to group 2 (83; (70-90) vs. 155.5; (60 -120) minutes; p< 0.001). ECMO duration was longer in group 2 (6 days; (6-7) vs. 3 days; (3-4); p<0.001). Stroke occurred in 10 patients (33.33%) in group 2 vs. 1 patient (2.22%) in groups 1; p< 0.001. Longer cross-clamp (OR: 1.61, 95% CI: 1.11- 2.31, p= 0.011) and bypass time (OR: 1.76; 95% CI: 1.57- 1.99; p= 0.048) predicted postoperative mortality.
Conclusion: Central ven-arterial extramembrane oxygenation can be used as a bridge to recovery in patients with stunned myocardium post coronary bypass grafting, especially in centers where heart transplantation and ventricular assist devices are not available.
ORTONORMALISASI VEKTOR BASIS DENGAN PROSES GRAM SCHMIDT
Authors: Wardani Irma Budi , Sunardi Hartanto 
Published: May 2020

Gram schmidt process is one of linear algebra roles that associated by basis vector. This thesis aims to determine theoretically step by step in the process of gram schmidt.
Gram schmidt process is a method that used to convert an arbitrary basis vector into an orthogonal basis vector. After orthogonal basis vector had been obtained, the orthogonal basis vector was compiled into an orthonormal basis through step by step.
A vector on will be expressed as a basis vector if the vector if the vectors in are linear independently and spinning against . And a basis vector can be expressed as a set of orthonormal vectors, then the vector is an orthogonalvector and has norm = 1. If the basis vector has norm 1, to normalize the basis vector by using gram schmidt process.
Keywords: vector base, ortonormalisasi, gram schmidt proses.
PEMBUKTIAN DUA PULUH LIMA DALIL PYTHAGORAS
Authors: Sunaryo Sunaryo , Sunardi Hartanto 
Published: May 2020

Mathematics is a discipline that can help Pythagoras solve some various problems (Government,Industry, science) Pythagoras is the first person who contributed the proof of this theorem, however, many people believe that there is a special connection between the sides of a ringt triangle just a long before Phytagoras found it. However Phytagoras gave very significant important role in various major related to mathematics. For example to form trigonometri and algebra, this theorem is a connection between Euclidean geometry among the three sides of the triangle which shaped from the length of the two sides will equalto square number which formed by the hypotenuse. In athematics, Phytagoras theorem is written using the general form , where a and b represent the length of two other condition of a right triagle and c has a length of the hypotenuse. This observation aim to describe there verification of twenty five arguments of Phytagoras appropriately and correctly. And by knowing the expected arguments of Phytagoras makes learning math is not just memorize a formula but to understand more deeply and can be implemented in their daily lives. This research method using the method of literature from the literature study theore hcal framework underlying stuctored problem soling method that includes the use of the arguments of Phytagras, Phytagoras formula, triple Phytagoras, comparison of the sides of aright triangle for special angels and lines o the trigle.
Keywords : Phytagoras, hipotenusa.
HUBUNGAN ANTARA MOTIVASI DENGAN HASIL BELAJAR MATEMATIKA PADA POKOK BAHASAN PERSAMAAN DAN PERTIDAKSAMAAN LINIER SIWA KELAS X APK SMK YPM 3 TAMAN
Authors: Kartini Kartini 
Published: May 2020

This research is motivated by the fact of learning outcomes and a low level of mastery students were most likely caused by low motivation to learn is possessed by students. Motivation itself is based, the environment of the school and family environment. The design of this study used a correlational research design. This study aims to determine whether there is a relationship between motivation and learning outcomes on the subject of math equations and linear inequalities. Instrument of data collection using questionnaires to obtain data of motivation to learn, and test methods for obtaining data learning outcomes. The data were analyzed using correlation techniques poduct moment. The population in this study were students, the students of class X APK SMK YPM 3 Taman Sidoarjo were 112 students, while the sample is taken by random sampling as much as 35% of the 40 students. The research results obtained correlation coefficient = 0.379, later than at significant level of 5% and N = 40 is 0.312 Turns greater than . It can be concluded that there is a relationship between motivation and learning outcomes on the subject of math equations and linear inequalities.

Keywords: learning motivation, learning outcomes, linear equations and inequalities
PENGARUH PENDEKATAN CONTEXTUAL TEACHING AND LEARNING (CTL) TERHADAP HASIL BELAJAR MATEMATIKA
Authors: Hidayatin Nuril 
Published: May 2020

Students often have difficulty in linking the material with the problems of life in the real world. This may result in a decrease in mathematics learning outcomes in schools. Therefore, teachers should be able to make learning fun during the learning process. To overcome these problems, teachers can use the approach Contextual Teaching and Learning (CTL) during learning process. This contextual approach to make students more active and to encourage students to make connections between knowledge and real-life situation. The purpose of this study was to determine whether there is influence approach Contextual Teaching and Learning (CTL) on learning outcomes mathematics SMP Negeri 4 Waru Academic Year 2015-2016. During the learning activities, the experimental class students formed into groups. Each group consisted of 4-5 students. During the learning process, the researchers fed the material set in the experimental class and the control class as samples in the study. Researchers chose the material set for the number of students who have difficulty in solving the problem set. To obtain the data result of learning mathematics, researchers took data from the pre-test and post-test. Pre-test given to students to find out how the students' abilities before receiving material taught by researchers, while the post-test was given to determine student learning outcomes after the student has finished the learning activities. Both of these classes have the same number of students is 32 students. In this study, found that with and. From these results it is rejected and Ha is it can be concluded that there is influence approach Contextual Teaching and Learning (CTL) on learning outcomes mathematics SMP Negeri 4 Waru Academic Year 2015-2016.

Keywords: CTL (Contextual Teaching and Learning), sudent’s achievement.
PENERAPAN PENDEKATAN PROBLEM POSING PEMBELAJARAN MATEMATIKA DI KELAS VIII A SMPN 2 TAMAN
Authors: Hidayah Anna Wahyu 
Published: May 2020

This research in the wake of the fact it can be said that the rapid technological development wasbased on the development of mathematics, math has been taught right from kindergarten up of a higher level.To print a future thinker with math experts needed for effective learning and efficientso that teachers should be able to select appropriate learning for students. formulation of the problem in this research is” how completeness of student learning outcomes, level of creative thinking abilitiesand the students' response to learning Problem Posing?” the purpose of this study was to describeclassically completeness of student learning outcome, level of creative thinking abilitiesand the students, and the response given students after learning Problem Posing.In this study to measure student mastery gained from achievement test(THB), to determine the level of students' creative thinking abilities(TKBKS) taken from the test results correlated learningwith components of creative thinkingthat is fluency, flexibility, originility, dan elaborationand to evaluate the response of the students was obtained from questionnaires source data from this study is the class VIII A SMPN 2 Taman. Data obtained from this study are as followsz: from the results THB stated that in the classical completeness of85,29 %,as much as 67 % students occupied TKBKS levelfour (very creative) and the students' response to the statement of learning Problem Posing have an average maximum of 3,51that is " I feel Problem Posing learning model is useful for learning mathematics”. From the above it can be concluded that the study results in the classical mastery learning Students Creative Thinking Ability level the student is able to be in a position TKBS 4 ( very creative ) , students can be said to be a positive response.
Keywords: Creative thinking, level of creative thinking, fluency, flexibility, originility, elaboration, Problem Posing
HUBUNGAN KESULITAN BELAJAR MATEMATIKA TERHADAP KEMAMPUAN KONEKSI MATEMATIKA PADA SISWA SMK KARTIKA 1 SURABAYA
Authors: Hartanti Elok Hidhayati 
Published: May 2020

This research is motivated by the low ability students' mathematical connections. Mathematical reasoning and connections are two basic mathematical ability that must be mastered middle school students. However, many students have problems and learning difficulties in solving mathematical problems. Through the process of mathematical connections, conceptual thinking and students' horizons will be broader, the students will have the skills to solve problems and make decisions. The problem of this research is " Is there any connection to the students' mathematics learning difficulties mathematical connection capability? ". Subjects in these criteria is a class XI student of SMK Kartika Accounting 1 Surabaya. Data obtained by questionnaire to measure students' learning difficulties and then given treatment for the provision of learning achievement test items to get valid data. Based on the analysis of data by using the formula Pearson product moment is known H_0 is no relationship difficulty learning mathematics against the ability to connect mathematics to the students of class XI AK-1 SMK Kartika 1 Surabaya while the H1 is no relationship difficulty learning mathematics against the ability to connect mathematics to the students of class XI AK-1 SMK Kartika 1 Surabaya. Of the formula product moment correlation can be obtained rhitung with significance level of 5% showed greater than the value rtabel = 0.344 and rhitung = 0.45; where r_hitung> r_tabel or 0.45> 0.344, it can be concluded that learning difficulties affect the ability of students' mathematical connections.
Keywords: Learning Difficulties, Mathematics Connection Capability
PROFIL GAYA BELAJAR SISWA MELALUI PENDEKATAN KONSTRUKTIVISME DI SMA ANTARTIKA SIDOARJO
Authors: Opticia Nerva Nur 
Published: May 2020

Understanding of mathematical concepts can be controlled well by the students if teachers can make students tend to be active pembelajaran.Untuk approach is needed to make students more active role in learning. One way that could condition the students play an active role in learning is the constructivism approach. This approach begins with giving problems to the students who ultimately students are expected to find their own way of solving the problem. In order for this study could be run better then the teacher should know the learning styles of each Shiva in order to adapt the way of good teaching. Observed learning styles are visual, auditory, and kinesthetic. The data source of this research in X Mipa 5 SMA Antartika Sidoarjo. Of the class was given a questionnaire about learning styles. Then the results of the questionnaire is reduced so that the two subjects are drawn from every learning style. Having drawn six subjects, administered tests problem solving with the criteria for having written a neat, use of symbols in the plant concept, task writing / composing, sensitivity to issues of artistic and understand about the form of the writing / reading From the results of these tests chrosscheked with interview , From the analysis of the test has been obtained, is obtained as follows. Profiles visual learning style has characteristics include in Lesson prefer casual, like raised his voice while reading, more like a lot of theory in practice, dislikes memorize and like math but weak in the count. Profile auditory learning style has characteristics include the time work on the problems less conscientious, like move their lips while reading, more like learning groups, dislike to memorize, like mathematics. Profile kinesthetic learning style has characteristics include the time learning like more prektek, sometimes like moving his lips while reading, more like learning groups, dislike to memorize, dislike math.
Keywords: Learning Styles, Constructivist Approach.
PENGEMBANGAN INSTRUMEN NOTES UNTUK MENGUKUR KEMAMPUAN AFEKTIF MAHASISWA DALAM KURIKULUM KKNI ( DEVELOPMENT OF NON TEST INSTRUMENTS TO MEASURING STUDENT AFFECTED ABILITY IN CURRICULUM KKNI)
Authors: Hartono Hartono , Jamilah Jamilah , Fitriawan Dona 
Published: May 2020

Abstrak
Penelitian bertujuan mendeskripsikan pengembangan instrumen nontes untuk mengukur kemampuan afektif mahasiswa dalam kurikulum KKNI. Metode penelitian yang digunakan adalah metode deskriptif dengan model pengembangan menggunakan P4TK yaitu spesifikasi instrumen, menulis instrumen, menentukan skala instrumen, sistem penskoran, telaah instrumen, merakit instrumen, uji coba instrumen, analisis hasil uji coba, perbaikan instrumen. Hasi penelitian diperoleh 1) Kisi-kisi penyusunan instrumen nontes untuk mengukur kemampuan afektif mahasiswa dalam kurikulum KKNI dalam penelitian ini telah cukup valid dan reliabel; 2) Hasil validitas instrumen nontes untuk mengukur kemampuan afektif mahasiswa dalam kurikulum KKNI telah memenuhi persyaratan; 3) Reliabilitas intrumen nontes untuk mengukur kemampuan afektif mahasiswa dalam kurikulum KKNI hasilnya tinggi dan instrumen layak untuk digunakan; 4) Hasil uji coba penggunaan instrumen nontes untuk mengukur kemampuan afektif mahasiswa dalam kurikulum KKNI diperoleh pada masing-masing soal yang berjumlah 15 semua hasilnya baik.
Kata kunci: Instrumen Nontes, Kemampuan Afektif Mahasiswa, Kurikulum KKNI
Abstract
This research aimed to describe the development of nontest instrument to measure students' affective ability in KKNI curriculum. The research method used is descriptive method with development model using P4TK that is instrument specification, instrument writing, instrument scale, scoring system, instrument study, instrument assembling, instrument test, test result analysis, instrument improvement. The result of research is 1) Nontes instrument preparation grid to measure student affective ability in KKNI curriculum in this research has been quite valid and reliable; 2) The result of validity of nontest instrument to measure student affective ability in KKNI curriculum has fulfilled the requirement; 3) Nontest intruments reliability to measure students' affective ability in high quality KKNI curriculum and appropriate instruments for use; 4) The test result of the use of nontest instrument to measure affective ability of students in KKNI curriculum is obtained on each of the 15 questions all good results.

Keywords: Non test instrument, Student affective Ability, Curriculum KKNI
PROFIL KEMAMPUAN MAHASISWA DALAM MEMECAHKAN MASALAH MATEMATIKA DISKRIT DITINJAU DARI KECERDASAN GANDA (MULTIPLE INTELLIGENCES)
Authors: Ladyawati Erlin 
Published: May 2020

Dengan penguasaan IPTEK yang baik, mahasiswa diharapkan memiliki kemampuan bersaing di masyarakat dan mampu menerapkan ilmunya untuk memecahkan berbagai masalah. Begitu juga dalam bidang pendidikan. Jika mahasiswa dapat menyelesaikan permasalahan yang dihadapinya, maka kemampuan mahasiswa tersebut akan menjadi berkembang. Rumusan masalah dalam penelitian ini adalah bagaimana profil mahasiswa dengan kecerdasan logis-matematis dan kecerdasan visual-spasial dalam memecahkan masalah Matematika Diskrit?. Penelitian ini merupakan penelitian deskriptif kualitatif. Subjek dari penelitian ini adalah mahasiswa Program Studi Matematika. Pada penelitian ini mahasiswa terlebih dahulu diberi daftar periksa inteligensi, kemudian daftar periksa inteligensi tersebut dianalisis untuk pengambilan sampel dari 2 jenis kecerdasan yang dominan yaitu kecerdasan logis-matematis dan kecerdasan visual-spasial. Kemudian sampel dari masing-masing kecerdasan ganda (multiple intelligences) tersebut diberi tes pemecahan masalah. Sampel diberi tes pemecahan masalah dilanjutkan dengan wawancara kemudian hasilnya dianalisis secara mendalam berdasarkan langkah-langkah pemecahan masalah Berry Beyer. Dari hasil analisis data diperoleh kesimpulan bahwa pada mahasiswa dengan kecerdasan logis-matematis untuk aspek merumuskan masalah atau soal, mengembangkan jawaban sementara, dan menguji jawaban sementara termasuk kategori baik. Sedangkan pada aspek mengembangkan dan mengambil kesimpulan dan menerapkan kesimpulan pada data atau pengalaman baru mahasiswa dengan kecerdasan ini termasuk kategori cukup baik. Sehingga secara keseluruhan sampel mahasiswa dengan kecerdasan logis-matematis memliki kategori yang baik dalam memecahkan masalah Matematika Diskrit. Pada mahasiswa dengan kecerdasan visual-spasial, untuk aspek merumuskan masalah atau soal, aspek mengembangkan jawaban sementara, dan aspek menguji jawaban sementara, sampel termasuk kategori cukup baik. Sedangkan pada aspek mengembangkan dan mengambil kesimpulan, dan menerapkan kesimpulan pada data atau pengalaman baru termasuk kategori kurang baik. Sehingga secara keseluruhan sampel mahasiswa dengan kecerdasan visual-spasial memliki kategori yang cukup baik dalam memecahkan masalah Matematika Diskrit.
Kata Kunci : Pemecahan Masalah, Multiple Intellegencies, Kecerdasan Logis-Matematis, Kecerdasan
Visual-Spasial
Some Families of Trees Arising in Permutation Analysis
Authors: Bouvel Mathilde , Mishna Marni , Nicaud Cyril 
Published: May 2020

We extend classical results on simple varieties of trees (asymptotic enumeration, average behavior of tree parameters) to trees counted by their number of leaves. Motivated by genome comparison of related species, we then apply these results to strong interval trees with a restriction on the arity of prime nodes. Doing so, we describe a filtration of the set of permutations based on their strong interval trees. This filtration is also studied from a purely analytical point of view, thus illustrating the convergence of analytic series towards a non-analytic limit at the level of the asymptotic behavior of their coefficients.