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Hubungan Change of Direction Deficit Dengan Kecepatan Sprint Dan Daya Ledak Tungkai Pada Pemain Sepakbola Remaja Zainuddin, M. Said; Usman, Arifuddin; Zakaria, Ahmad
SPORTIVE: Journal Of Physical Education, Sport and Recreation Vol. 10 No. 1 (2026): 30 Maret 2026
Publisher : Prodi Pendidikan Jasmani dan Olahraga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ja5yxd82

Abstract

This study aimed to examine the relationships between Change of Direction Deficit (CoDD), linear sprint speed, and lower limb tenaga in male youth soccer players. A correlational, cross-sectional design was employed. The sample consisted of 30 male soccer players aged 18–19 years from the Universitas Negeri Makassar team, who were engaged in structured training. The study was conducted on the Faculty of Sports Science (FIKK) soccer field between September and November 2025. Performance assessments included the 505 Change of Direction (CoD) test, a 20 m linear sprint test with 5, 10, and 20 m split times, and lower limb tenaga measured via a vertical jump test. CoDD was calculated as the difference between 505 CoD time and 10–20 m sprint time. Data were analyzed using descriptive statistics, the Shapiro–Wilk normality test, and Pearson’s correlation with a significance level of α = 0.05. The results indicated no significant relationships between CoDD and 5 m, 10 m, or 20 m sprint times (r = 0.134–0.188; p > 0.05), confirming that CoDD is dependent of linear sprint speed. In contrast, a significant negative correlation was found between CoDD and vertical jump height (r = -0.487; p = 0.006), suggesting that greater lower limb tenaga is associated with more efficient change of direction. These findings suggest that coaches should prioritize explosive leg training and utilize CoDD values as a tool for monitoring players' change-of-direction abilities. These findings support the use of CoDD as a specific indicator of change-of-direction ability in youth soccer players and highlight lower-limb tenaga development as a key component in training programs aimed at improving change-of-direction efficiency.
Analisis Perhitungan Stabilitas Lereng dengan Metode Fellenius (Ordinary Method of Slice) Menggunakan Program PHP (Professional Home Page Hypertext Preprocessor) Fatria, Akhmad Ridho; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 2 (2016): Edisi Juni 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i2.383

Abstract

Slopes as we know is a sloping ground surface and forming an angle to a horizontal plane andunprotected. Slopes there are generally divided into two categories of land slope, the naturalslopes and artificial slopes. Slope collapse could occur as a result of thrust arising due to the loadon the ground. In the method of calculation of the safety factor of the slope stability, a methodfrequently used in calculating the slope stability is by Fellenius method (Ordinary Method ofSlice), Fellenius method first introduced by Fellenius, slope stability calculations with Felleniusmethod if the count is use a lot of complicated manual calculations so that it becomes lesspractical and relatively take times.One effort to get the accurate calculation of slope stability in a short time, which is by making thesafety factor calculation program on the stability of the slope using a programming language.From the comparison calculation with the program and the results of manual counting,Calculating the percentage difference of less than 1 %, so the program can be used. With the datathat you have this program is able to calculate with no more than 1 minute after entering the dataslope previously calculated manually. While for the time that is required in calculating or writingthe result of manual calculation takes more than 60 minutes. Then it will produce time efficiencyfaster than using a manual calculation.Keywords: Analysis of Slope Stability, Safety Factor, Fellenius Method, PHP
Studi Pemodelan Stokastik Curah Hujan Harian di Stasiun Kota Metro Arizona, Bramesvara; Zakaria, Ahmad; Purwadi, Ofik Toupik
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.385

Abstract

The purpose of this research is to study the daily rainfall data series The data used daily rainfall data with data length in 1986-2013 at 3 stations namely Metro station R-206, R-107 Raman Dam, and Argoguruh R-106 are located in Metro City and the surrounding areas.The modeling is done using the data length of 512 days. By using the frequency of rainfall data obtained then apply the Fourier equation and the method of least squares is then generated model of periodic daily rainfall. Rainfall stochastic model of rainfall data is assumed as the difference between precipitation data with periodic rainfall models using the 253 components. Based on data from a series of stochastic, stochastic component is computed using autoregressive models approach. Stochastic model presented by using the autoregressive model of order three. Validation stochastic series, between the data and the model is done by calculating the correlation coefficient.Based on these results we can conclude synthetic daily rainfall data time series obtained very significant approach measurable rainfall. With the value of the average correlation coefficient stochastic model is 0.9981.keywords: daily rainfall, autoregresif models, stochastic component.
Studi Pemodelan Curah hujan sintetik dari beberapa stasiun di wilayah Pringsewu Perdana, Damar Adi; Zakaria, Ahmad; Sumiharni, Sumiharni
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.386

Abstract

This research conducted to study the characteristics of daily rainfall and model making ofsynthetic daily rainfall in Pringsewu regency using periodic model, stochastic model and periodicstochastic models. This research conducted using daily rainfall data with length of 1984-2013from three rainfall stations, Pringsewu, Wonokriyo and Banyuwangi rainfall stations.These models performed by using 512 days annual data. Using rainfall frequency obtained andapplying the spectral method and the least squares method, it can be generated the daily rainfallperiodic models. Rainfall stochastic model assumed as the difference between rainfall data withperiodic rainfall models. Based on data from the series of stochastic, the component wascalculated using the approach of autoregressive models. Stochastic model was presented by usingthe autoregressive model of order three. Periodic stochastic model obtained by merging periodicmodel and stochastic model. Model validation and data obtained by calculating the correlationcoefficient. Based on the results of this research, it can be concluded that daily rainfall time seriescan be very significantly approximately recorded rainfall data. With the the average value ofcoefficient correlation of periodic model is 0.98019, coefficient correlation of stochastic model is0.99808, and coefficient correlation stochastic of periodic model is 0.99993keywords: daily rainfall, autoregresif models, stochastic component.
Study System Drainase di Fakultas Teknik Universitas Lampung Ardian, Riko Berli; Zakaria, Ahmad; Susilo, Gatot Eko
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.403

Abstract

Penelitian ini dilakukan untuk mengetahui bagaimana sistem drainase yang ada apakah sudah optimal dan bagaimana pula kapasitas saluran yang ada apakah masih memadai atau tidak .Pada pelaksnaannya dilakukan analisis hidrologi dan hidrolika. Analisis hidrologi menggunakan data curah hujan maksimum setelah itu dilakukan pengukuran dispersi melalui perhitungan parameter statistik. Dilanjutkan dengan pemilihan jenis distribusi untuk  mendapatkan cara mengolah data pengukuran curah hujan rencana dan perhitungan intensitas hujan.  Analissis hidrolika berupa kapasitas debit drainase eksisting, setelah itu di buat sistem dan dimensi yang sesuai.Hasil penelitian berdasarkan pengukuran dispersi diperoleh distribusi yang cocok adalah Distribusi Log Pearson III dan diperoleh nilai curah hujan rencana untuk kala ulang 2 tahun sebesar 101,7983739 mm  Koefisien pengaliran pada DAS diperoleh sebesar 0,8961 dengan luas DAS 501,32 m2. Nilai debit hujan untuk kala ulang 2 tahun dengan metode rasional diperoleh nilai 2,1172 m3/detik   Nilai Qhujan adalah 2,1172 m3/detik sedangkan nilai Qteoritis adalah 0,0833 m3/detik. Karena Qhujan lebih besar daripada Qteoritis, dapat disimpulkan bahwa saluran drainase eksisting sudah tidak cukup lagi untuk menampung debit banjir yang ada.   Kata kunci : drainase, analisis hidrologi , analisis hidrolika , distribusi log                           pearson III, koefisien pengaliran, debit.
Analisa Kesalahan Pemodelan Data Pasang Surut Stasiun Tanjung Priok Prasetyo, Agus Ari; Zakaria, Ahmad; Welly, Margareta
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.415

Abstract

This research was conducted to study the characteristics of tides and tidal make synthetic model.The data used tide data hourly to the length of the data in 1985-1987 at the station Tanjung Priok,Jakarta province, Indonesia.The modeling is performed using a data length of 15 daily or for any length of data to 360 hoursand data 30 daily or for any length of data 720. Using data from tide observations obtained andapply Anfor equations and method least squares can be generated model of periodic tidal hourly.Model periodic tidal of tidal observation data is assumed as the model data obtained by using 9tidal harmonic components. From the modeling results and the measured data can be seen thecorrelation coefficient and the value of modeling errors.Based on these results we can conclude tidal hourly synthetic time series obtained significantlyapproaching tidal measurable. The correlation coefficient was very good, the value of the averagecorrelation coefficient models 30 daily periodic observation is 0.9377 and the average ofcorrelation coefficient models 15 daily periodic observation is 0.9571. From this research can beseen the value of a good tide data and allow for cost saving tide observations with 15 days ofobservation.keywords: daily tidal, the value of modeling errors, correlation coefficient
Analisis Data Curah Hujan yang Hilang Dengan Menggunakan Metode Normal Ratio, Inversed Square Distance, dan Cara Rata-Rata Aljabar (Studi Kasus Curah Hujan Beberapa Stasiun Hujan Daerah Bandar Lampung) Prawaka, Fanny; Zakaria, Ahmad; Tugiono, Subuh
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.418

Abstract

This research is done with the purpose to calculate the correlation of measurable rainfall data with rainfall data on the calculation using each method mentioned above which is every method using three rainfall stasions, four rainfall stasions, and five rainfall stasions. It’s also purposed to decide with how many stasions and what method is resulting the best correlation value. As the result of the research using algebraic average method, normal ratio method, and inversed square distance method with daily rainfall data in a year, cumulative monthly rainfall data, and also average monthly rainfall data, it can be concluded that the greater number of stasions resulting the better correlation value. The correlation value with cumulative monthly rainfall data and average monthly rainfall data using some different number of stasions for each method is resulting a not significant differences with the value of percentage is 0,00025% to 0,01182%. Thecalculation uses cumulative monthly rainfall data and average monthly rainfall data showing the better correlation value than calculation using daily rainfall data in a year (0,67230 - 0,72097compared to 0,19305 - 0,25890). Keywords: Rainfall, normal ratio method, inversed square distance method, algebraic average method
Analisis Pembentukan MAT Pada Jaringan Sederhana Menggunakan Program Lazarus Handayani, Esty; Sulistyorini, Rahayu; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 2 (2015): Edisi Juni 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i2.449

Abstract

Origin Destination Matrix (O-D MATRIX) is two- dimensional matrix are often to described thepatterns of movement that contains information the amount of intrazone movement. O-D MATRIXformation in this research on simple network with 5 origin-destination zone (O-D) used Gravitymethod with two-limitation . In this research, O-D MATRIX formation on a simple network usingLazarus program. Lazarus is the one of Integrated Development Environment (IDE) from FreePascal Compailer (FPC). FPC that can be used for Window, Linux, and MAC. If the previouscalculations requier a longer time, this program will be quickly and efficiently of O-D Matrix. Ittakes 3 hours to calculate O-D Matrix manualy and input the formula will enhance errorpossibility. This program spents 5 minutes to calculate O-D Matrix .Keywords: Lazarus, Origin Destination Matrix, Zone
Analisis Perhitungan Daya Dukung Pondasi Footplate dengan Menggunakan PHP script Ismail, M Rizky; Setyanto, Setyanto; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 3 (2015): Edisi September 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i3.478

Abstract

Foundation as we know is part of construction. A purpose of this construction is to continue astructure load to the ground which can endure the load without settlement effect. In order toguarantee the building is on stable condition concerning from structure load or outer force like awind pressure, earthquake, etc and settlement which is more than permission limit unallowed. Toavoid unfunctional foundation structure, foundation must placed on the solid ground which canendure sttructure load without causing excessive settlement. In this era computer technologydevelop quickly. Part of that is programming using PHP script. Programming using script canmake some application to help us in our analyzing dan calculating proccess with interestingdesign , so we can operate it easily. And this program is using PHP script method . Basicallyanalyzing and calculating footplate manually can used up our time. Because on calculating thiswe use a complex method, we need program to analyze and calculate footplate foundation. Tomake a calculation simpler and quicker. Some of manual test result which are found by us ishaving 1% difference with the program. So we consider this program is able to calculate thefootplate foundationKeywords : foundation, footplate, PHP
Analisis Harga Satuan Pekerjaan Jalan dan Jembatan Menggunakan Program Lazarus (studi kasus devisi 3, 5, 6, & 7) Trisno Imany, Tri Subakti; Hadi, Yohannes Martono; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 4 (2016): Edisi Desember 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i4.547

Abstract

In the activity construction work must be would related to the cost. Someone who estimate the budget construction cost is called estimator. An estimate of the cost was called unit price analysis of work. Most of unit price analysis still was counted manually , but if seen from various points of view , calculations conducted in the manual still cannot meet its demands availability of information a quick and accurate. Therefore needs to get a program automatically for can count quickly unit price analysis.To observe a unit price of work so fast and accurated can be making an application analysis using the lazarus and than becomparations with the method of analysis issued by ministry of public worksThe result of making program unit price analysis of work of using lazarus is tested and validated by calculation use secondary data issued by ministry of public works. By using this program the calculations be more effective when compared with calculate by hand. Keywords: Unit price analysis, Lazarus
Co-Authors Abyuliani, Alza Achmad Karim adama, riri arinda Afifah, Mar'atul Afriami, Lusmeilia Agatha, Muhammad Naufal Agustriyanto, Dono Ahmad Herison Ahmad Tusi Ahsan, Fathan Naufal Aji Saputra, Aji Aji, Badruzzaman Al Rasyid, Burhan Najib Amanda, Tiara Maelta Amidi Amidi, Amidi Amri, Resica Permata Andika, Ivana Aprili Angelina Angelina Anggraini , Melisa anggraini, yeshe Angin, Geleng Perangin Ardian, Riko Berli Arfanda, Poppy Elisano Arie Pratama Putra Arief, Farah Diba Arifaini , Nur Arizona, Bramesvara Armijon . Ashruri Ashruri, Ashruri Asrorudin, Udin Atika Sari Atmoko, Fajar Destri Aynuddin, . Aynuddin, Aynuddin Ayu Kurniasih, Ayu Ayuningsih, Titik Cahyo, Febriansyah Dwi Cesar, Irvan Tegar Chairil Anwar Citra Dewi Damayanti, Amelia Nurul Dian Kusumaningsih Dian Pratiwi Didik Didik Dinaryoko, Arif Diwantari, Windy Putri Djanis, Ratnawati L. Djanis, Ratnawati Lilasari Djasmasari, Wittri Dwi Arnanda Putra, Novindio Dwi Joko Winarno Dyah Indriana K Dyah Indriana Kusumastuti Efendi, Muhamad Masjun Elvida, Maharani Endang Sri Lestari Endro Prasetyo Wahono Fachrurrazie, . Fachrurrazie, Fachrurrazie Fadela, Dian Mira Fathony, Awal Rifan Fatoni, Fatoni Fatria, Akhmad Ridho Fatria, Akhmad Ridho Fikri, Modh. Haikal Finanda, Reysa Fitria, Mizha Nur Fridayanto, Syahlan Naufal Gani, Rama Dian Gatot Eko Susilo Gultom, Winda Maria Rebecca Habib Algifari Hadi, Yohannes Martono Handayani, Agustia Handayani, Esty Hardi, Alif Aryadi Hartantio, Fajar Hartoto, Dwi Nanda Putra hasyimzoem, Edwin Faisol Hayat, Mohammad Haz, Arzuu Abnu Haziman, Muhammad Luthfan Herawati Herawati Herdiana, I Komang Tri Herizon, Ahmad Ians Aprilo Ichsani, Muhammad Desyan Idharmahadi Adha Imran, Fadli Indarto, Asyidika Vito Indriana K, Dyah Irvani, Asep Irvan Iskandar, Rina Iswan Iswan Iswan, I Jalal, Muhammad Agung Wijdan Jamaludin HN, . Jauhari Arifin Jaya, Redhinansyah Kurniawan Jerfikanasa Murda, Gung Bagus Joko, Dwi Karim, Achmad Kholiq, Muhammad Nur Kristianto Usman kuncoro, wahyu hadi Kurniawan, Deri Rahli Kurniawan, Panca Kurniawan, Rizqi Kurniyawan, Ikhfan Kusanti, Nency Dwi Kusumastuti, Dyah Kusumastuti, Dyah I. kuswadi, didit kuswadi Laksmana, M. Bima Lepiana, Tenti Lukitawati, Annika Lusmeilia Afriani M Imran Hasanuddin M Rizky Ismail M. Said Zainuddin Manurung, Lodewick Mapiliandari, Inda Mappaompo, M. Adam Mariyanto Mariyanto Masdar Helmi MMSI Irfan ,S. Kom Muhammad Fadli Mukhlisah Nawawi, M Lucky Apriansyah Niken, Chatarina Ningtyas, Widya Nurcahya Novianti, Tika Christy Nugraha , Billy Nugraheni, Melly Nur Arifaini Nurdiani Nurdiani, Nurdiani Nurdiani, . Ofik Taufik P, Ofik Ofik Taufik Purwadi, Ofik Taufik Oktiani, Asri Pelawi, Rinaldi Peranginangin, Imanuel Perdana, Damar Adi PERMADI, I GUSTI AGUNG DIDIT EKA Persada, Citra Phohan, Phohan Pradipta, Adya Rizky Prasetio, Rizki Lazuardi Prasetyo, Agus Ari Pratiwi, Ayu Ning Trias Prawaka, Fanny Prawaka, Muhammad Hendro Purna, Bagus Mustofa Purwadi , Ofik Taupik Purwadi, Ofik Purwadi, Ofik Taupik Purwadi, Ofik Toupik Purwadi, Opik Taufik Qur'ani, Mutiara Nurul Rachmanda, Farhan Rachmi, Silvia Rachmy, Silvia Rahayu Sulistyorini Randy Setiawan, Randy Razak, Risdha Sagita Restika Putri Retno Farhana Nurulita Rina Indriani Rinaldi, M. Fahmi Rizky Al Mufarid, Andi Muhammad Romdani, Yuda Romi Fadly Rosalina Rosalina Rosalina, . Salsabila, Adira Sampurna, Sindu Abadi Saputra, Datra Peta Saputra, Eko Adi Saputra, Fajar Ilham Saputro, Rifki Ananda Sari, Dwi Winda Sari, Okta Mulya Sasongko, Respati Anton Sauri, Sopian Septian, Rio Dwi Septiansari, Annisa Putri Dwi Setia, Vika Setyanto Setyanto Setyanugraha, Tegar Sitanaya, Brigitha Cindy Siti Nurdianti Muhajir Siti Nurul Khotimah Siti Nurul Khotimah Slamet Riyadi Styani, Erna Subuh Tugiono, Subuh Suharni Suharni Sulistiyorini, Rahayu Sumarno, Ari Pitoyo Sumharni, Sumiharni Sumiharni Sumiharni Suyadi Suyadi Syah, Aminudin Syahruli, Firman Tambunan, Jenny Anna Margaretha Taufik P, Ofik Tomi, Muhammad Tridawati, Anggun Trisdiana, Fitri Trisnar Adi Prabowo Trisno Imany, Tri Subakti Tuhu Pangestu, Ibnu Umar, Rizki Prinanda Usman, Arifuddin W, Endro W, Endro Prasetyo Wahono, Endro Wahono, Endro Praseyto Wardhani, Puspita Sri Ayu Welly, Margareta widarsono, eko Widya Anggraeni, Widya Wijaya, Riki Chandra Winarno, Dwijoko Yacub, Vanita Kesumawati Yandriguna, Medi Yanti, Cristi Yohanes Martono Hadi Yuda Romdania yulianto, alim Yusma Sari, Nia Hana Zainuddin, M Said