Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14601
Rendy Setiawan, S. Sudarmadji, Budi Mulyadi, R. Hamdani
Kerang adalah jenis moluska yang hidup di substrat beberapa ekosistem perairan. Kerang merupakan komponen penting yang berperan sebagai pemakan sisa organik yang berada di perairan (deposit feeder) dan pemakan suspensi (suspension feeder) dalam rantai makanan. Beberapa spesies kerang juga dapat berperan dalam mengakumulasi (bioakumulator) logam berat. Di Taman Nasional Baluran, Jawa Timur, Indonesia, kerang sering digunakan oleh masyarakat setempat sebagai bahan dasar makanan dan cangkangnya dijual sebagai dekorasi kamar, perhiasan, dan peralatan rumah tangga. Akibat terjadinya eksploitasi terhadap kerang secara berlebihan, telah diduga bahwa kepadatan populasi dan keanekaragaman spesies kerang telah menurun. Penelitian ini dilakukan pada Oktober 2019 di Pantai Bilik di Taman Nasional Baluran untuk menentukan komposisi spesies dan preferensi habitat spesies kerang. Pengambilan sampel acak digunakan untuk mengukur komposisi spesies kerang di daerah penelitian. Hasil analisis menunjukkan bahwa terdapat adanya 6 ordo, 8 famili, 11 genera, dan 14 spesies. Nilai keanekaragaman spesies yang dihitung menggunakan indeks keanekaragaman jenis (H'). Hasil yang diperoleh menunjukkan telah ditemukan 2,109, yang menunjukkan keanekaragaman spesies tingkat sedang. Analisis kemerataan spesies menunjukkan nilai sebesar 0,79, yang berarti kemerataan spesies rendah. Habitat kerang di Pantai Bilik lebih terfokus pada bongkahan karang mati yang ditumbuhi alga. Moluska sering ditemukan bersama dengan karang dari keluarga Faviidae, terutama yang berasal dari genus Porites.
{"title":"Preferensi Habitat Spesies Kerang Laut (Moluska: Bivalvia) Di Ekosistem Intertidal Tanjung Bilik Taman Nasional Baluran","authors":"Rendy Setiawan, S. Sudarmadji, Budi Mulyadi, R. Hamdani","doi":"10.22487/25411969.2019.v8.i3.14601","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14601","url":null,"abstract":"Kerang adalah jenis moluska yang hidup di substrat beberapa ekosistem perairan. Kerang merupakan komponen penting yang berperan sebagai pemakan sisa organik yang berada di perairan (deposit feeder) dan pemakan suspensi (suspension feeder) dalam rantai makanan. Beberapa spesies kerang juga dapat berperan dalam mengakumulasi (bioakumulator) logam berat. Di Taman Nasional Baluran, Jawa Timur, Indonesia, kerang sering digunakan oleh masyarakat setempat sebagai bahan dasar makanan dan cangkangnya dijual sebagai dekorasi kamar, perhiasan, dan peralatan rumah tangga. Akibat terjadinya eksploitasi terhadap kerang secara berlebihan, telah diduga bahwa kepadatan populasi dan keanekaragaman spesies kerang telah menurun. Penelitian ini dilakukan pada Oktober 2019 di Pantai Bilik di Taman Nasional Baluran untuk menentukan komposisi spesies dan preferensi habitat spesies kerang. Pengambilan sampel acak digunakan untuk mengukur komposisi spesies kerang di daerah penelitian. Hasil analisis menunjukkan bahwa terdapat adanya 6 ordo, 8 famili, 11 genera, dan 14 spesies. Nilai keanekaragaman spesies yang dihitung menggunakan indeks keanekaragaman jenis (H'). Hasil yang diperoleh menunjukkan telah ditemukan 2,109, yang menunjukkan keanekaragaman spesies tingkat sedang. Analisis kemerataan spesies menunjukkan nilai sebesar 0,79, yang berarti kemerataan spesies rendah. Habitat kerang di Pantai Bilik lebih terfokus pada bongkahan karang mati yang ditumbuhi alga. Moluska sering ditemukan bersama dengan karang dari keluarga Faviidae, terutama yang berasal dari genus Porites.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130576384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14574
Hartina Hartina, F. Fahri, Mihwan Sataral, Nurmasita Mambuhu
Penelitian ini bertujuan untuk mengetahui keanekaragaman cacing tanah (Oligochaeta: Megascolicidae) pada beberapa ketinggian di Gunung Tompotika, Sulawesi Tengah, yang dilakukan dari bulan Februari sampai Mei 2019. Pengambilan sampel dilakukan di lima plot dengan berbagai tipe habitat, yaitu habitat Hutan Pinus Terbakar (HPT), habitat Hutan Primer (HP), habitat Hutan Sekunder (HS), habitat Kebun Mente (KM) dan habitat Hutan Tebangan (HTB). Pada masing-masing ketinggian ditentukan sebanyak 1 plot dengan ukuran 30m x 30m. setiap plot terdapat 9 titik pengambilan sampel dengan ukuran masing-masing titik pengambilan sampel yaitu 1m x 1m x 30cm (kedalaman) dan jarak antar titik pengambilan sampel yaitu 10 m. Dari hasil penelitian ditemukan genus Polypheretima dari famili Megascolicidae pada masing-masing ketinggian yaitu Polypheretima sp.
这项研究的目的是确定从2月到2019年5月在苏拉威西中部汤姆波提卡山的一些高度的蚯蚓(Oligochaeta: Megascolicidae)的多样性。在五个不同类型的栖息地进行采样，包括燃烧的松树林(HPT)、原始森林栖息地(HP)、二次森林栖息地(HS)、薄荷园(KM)和分支森林栖息地(HTB)。每一个高度都有一个30米乘30米的地块。每个图有9个抽样点，每个抽样点的大小为1m x 1m x 30cm(深度)，抽样点之间的距离为10米(33英尺)。研究发现，megascolidae属属一种多边形科，每一种高度都是聚乙烯聚乙烯sp。
{"title":"Deskripsi Cacing Tanah Genus Polypheretima Pada Beberapa Tipe Habitat di Gunung Tompotika, Sulawesi Tengah.","authors":"Hartina Hartina, F. Fahri, Mihwan Sataral, Nurmasita Mambuhu","doi":"10.22487/25411969.2019.v8.i3.14574","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14574","url":null,"abstract":"Penelitian ini bertujuan untuk mengetahui keanekaragaman cacing tanah (Oligochaeta: Megascolicidae) pada beberapa ketinggian di Gunung Tompotika, Sulawesi Tengah, yang dilakukan dari bulan Februari sampai Mei 2019. Pengambilan sampel dilakukan di lima plot dengan berbagai tipe habitat, yaitu habitat Hutan Pinus Terbakar (HPT), habitat Hutan Primer (HP), habitat Hutan Sekunder (HS), habitat Kebun Mente (KM) dan habitat Hutan Tebangan (HTB). Pada masing-masing ketinggian ditentukan sebanyak 1 plot dengan ukuran 30m x 30m. setiap plot terdapat 9 titik pengambilan sampel dengan ukuran masing-masing titik pengambilan sampel yaitu 1m x 1m x 30cm (kedalaman) dan jarak antar titik pengambilan sampel yaitu 10 m. Dari hasil penelitian ditemukan genus Polypheretima dari famili Megascolicidae pada masing-masing ketinggian yaitu Polypheretima sp.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133282051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14962
Zahra Awaliya Fauziah, Junaidi, Lilies Handayani
Stock is one type of long-term investment in the capital market. The stock movement indicator that is most often used in analysis by investors is the Indonesia Composite Index (ICI). ICI data is a variety of time series data, so it can be analyzed using forecasting. One forecasting method that can be used is the wavelet thresholding method. The wavelet threshold can analyze stationary, non-stationary, and nonlinear time series data by producing smooth estimates. The wavelet threshold has a wavelet filter and threshold parameters and threshold functions that can be used in analyzing. In this study MSE was assessed from several wavelet filters namely haar, daubechies, and coiflets filters at levels 1 to 7 with the thresholding function namely soft thresholding and thresholding parameters, namely minimax thresholding and sure thresholding. The data used is IHGS data in 2018 totaling 240 data. Based on the data analysis performed, MSE was obtained which means that the best filter provided in order 2 wavelet coiflet filter at level 2 and thresholding parameter is sure of thresholding with MSE value of 0.0094
{"title":"Analisis Indeks Harga Saham Gabungan (IHSG) Menggunakan Metode Wavelet Thresholding","authors":"Zahra Awaliya Fauziah, Junaidi, Lilies Handayani","doi":"10.22487/25411969.2019.v8.i3.14962","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14962","url":null,"abstract":"Stock is one type of long-term investment in the capital market. The stock movement indicator that is most often used in analysis by investors is the Indonesia Composite Index (ICI). ICI data is a variety of time series data, so it can be analyzed using forecasting. One forecasting method that can be used is the wavelet thresholding method. The wavelet threshold can analyze stationary, non-stationary, and nonlinear time series data by producing smooth estimates. The wavelet threshold has a wavelet filter and threshold parameters and threshold functions that can be used in analyzing. In this study MSE was assessed from several wavelet filters namely haar, daubechies, and coiflets filters at levels 1 to 7 with the thresholding function namely soft thresholding and thresholding parameters, namely minimax thresholding and sure thresholding. The data used is IHGS data in 2018 totaling 240 data. Based on the data analysis performed, MSE was obtained which means that the best filter provided in order 2 wavelet coiflet filter at level 2 and thresholding parameter is sure of thresholding with MSE value of 0.0094","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129745768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14960
Eka Oktavianty, Junaidi, Lilies Handayani
Cluster analysis is included in the method of multivariate analysis of interdependence. Cluster analysis is a multivariate technique that classifies objects into different groups between one group and another group. This research is applied to the case of education indicators, education is important for improving the quality of human resources. Educational indicators are a measuring tool used to see how well the quality of education. Educational indicators are classified using average linkage and median linkage. The results of the analysis showed that the median linkage obtained a standard deviation ratio value of 0.061 smaller than the standard deviation ratio average linkage value of 0.078. The method that has the smallest ratio is the method with the best performance. So that grouping City Districts in Sulawesi based on education indicators in 2017 is better to use the median linkage and obtained 5 clusters formed.
{"title":"Pengelompokkan Kabupaten/Kota Di Sulawesi Berdasarkan Indikator Pendidikan Menggunakan Analisis Klaster Average Linkage Dan Median Linkage","authors":"Eka Oktavianty, Junaidi, Lilies Handayani","doi":"10.22487/25411969.2019.v8.i3.14960","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14960","url":null,"abstract":"Cluster analysis is included in the method of multivariate analysis of interdependence. Cluster analysis is a multivariate technique that classifies objects into different groups between one group and another group. This research is applied to the case of education indicators, education is important for improving the quality of human resources. Educational indicators are a measuring tool used to see how well the quality of education. Educational indicators are classified using average linkage and median linkage. The results of the analysis showed that the median linkage obtained a standard deviation ratio value of 0.061 smaller than the standard deviation ratio average linkage value of 0.078. The method that has the smallest ratio is the method with the best performance. So that grouping City Districts in Sulawesi based on education indicators in 2017 is better to use the median linkage and obtained 5 clusters formed.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114394069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14961
M. Basit, Annawaty
This research was carried out in the littoral zone of Lake Lindu, Sigi Regency, Central Sulawesi with the aim to determine the distribution pattern of freshwater snail Melanoides tuberculata (Muller, 1774) whose area was divided into 5 sample sampling stations. Collecting samples using the transect line method drawn from the edge of the lake to the middle part of the 17 m long lake. Lines at each station are placed with a 19x15 cm reducing plot whose size is in accordance with the collection tool. The equipment for which the plot is placed is spaced 1.5 m, with the transect line collected three and having a distance of 2 m. Melanoides tuberculata (Muller, 1774) which is located in Lake Lindu, Sigi, Central Sulawesi, is distributed randomly and in groups.
{"title":"Pola Distribusi Keong Air Tawar Melanoides Tuberculata (Muller, 1774) Di Danau Lindu, Sigi, Sulawesi Tengah","authors":"M. Basit, Annawaty","doi":"10.22487/25411969.2019.v8.i3.14961","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14961","url":null,"abstract":"This research was carried out in the littoral zone of Lake Lindu, Sigi Regency, Central Sulawesi with the aim to determine the distribution pattern of freshwater snail Melanoides tuberculata (Muller, 1774) whose area was divided into 5 sample sampling stations. Collecting samples using the transect line method drawn from the edge of the lake to the middle part of the 17 m long lake. Lines at each station are placed with a 19x15 cm reducing plot whose size is in accordance with the collection tool. The equipment for which the plot is placed is spaced 1.5 m, with the transect line collected three and having a distance of 2 m. Melanoides tuberculata (Muller, 1774) which is located in Lake Lindu, Sigi, Central Sulawesi, is distributed randomly and in groups.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"589 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116069598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14958
Noviani Noviani, Meryany Ananda, I. N. Suwastika
Cacao (Theobroma cacao L.) has potential to symbiosis with endophytic microbes. These microorganisms have a symbiotic mutualism with host plants. The group of endophytic bacteria are produce antibiotics, anti-cancer, anti-fungal, anti-viral, volatile compounds, even insecticides, while endophytic fungi is a biological control agents. This study were aimed to isolate and characterize bacteria and fungi that have the potential as endophytic microbes from Sulawesi's superior cacao (T. cacao L.). The method used in this study was descriptive method to determine the characterization of bacteria and fungi that have the potential as endophytic microbes, the results showed that there were 2 bacterial isolates who has a different morphology and 1 fungal isolate suspected genus Aspergilus.
{"title":"Karakterisasi Bakteri dan Jamur yang Berpotensi Sebagai Mikroba Endofit Asal Kulit Buah Kakao (Theobroma cacao L.) Unggul Sulawesi-2","authors":"Noviani Noviani, Meryany Ananda, I. N. Suwastika","doi":"10.22487/25411969.2019.v8.i3.14958","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14958","url":null,"abstract":"Cacao (Theobroma cacao L.) has potential to symbiosis with endophytic microbes. These microorganisms have a symbiotic mutualism with host plants. The group of endophytic bacteria are produce antibiotics, anti-cancer, anti-fungal, anti-viral, volatile compounds, even insecticides, while endophytic fungi is a biological control agents. This study were aimed to isolate and characterize bacteria and fungi that have the potential as endophytic microbes from Sulawesi's superior cacao (T. cacao L.). The method used in this study was descriptive method to determine the characterization of bacteria and fungi that have the potential as endophytic microbes, the results showed that there were 2 bacterial isolates who has a different morphology and 1 fungal isolate suspected genus Aspergilus.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133285360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14598
V. Y. Kurniawan
A directed graph is also called as a quiver where is a finite set of vertices, is a set of arrows, and are two maps from to . A representation of a quiver is an assignment of a vector space to each vertex of and a linear mapping to each arrow. We denote by the direct sum of representasions and of a quiver . A representation is called indecomposable if is not ishomorphic to a direct sum of non-zero representations. This paper study about the properties of indecomposable representations. These properties will be used to investigate the necessary and sufficient condition of indecomposable representations.
{"title":"Sifat-Sifat Representasi Indekomposabel The Properties of Indecomposable Representations","authors":"V. Y. Kurniawan","doi":"10.22487/25411969.2019.v8.i3.14598","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14598","url":null,"abstract":"A directed graph is also called as a quiver where is a finite set of vertices, is a set of arrows, and are two maps from to . A representation of a quiver is an assignment of a vector space to each vertex of and a linear mapping to each arrow. We denote by the direct sum of representasions and of a quiver . A representation is called indecomposable if is not ishomorphic to a direct sum of non-zero representations. This paper study about the properties of indecomposable representations. These properties will be used to investigate the necessary and sufficient condition of indecomposable representations.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"385 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132375304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.22487/25411969.2019.v8.i3.14955
N. Abdullah, Junaidi, Lilies Handayani
Stocks can be defined as a sign of the participation of unilateral capital in a company or a limited liability company in the form of proof of a company's assets and it is formed as a valueble proof letters as a statement of participating in capital. Return stockis one of the factors that motivates investors to invest or interact and also a reward for the courage of investors to take risks or investments. PT Bank Rakyat Indonesia is one of the largest banks in Indonesia that experiences an increase in stock prices every year. The Brown's Weighted Exponential Moving Average (BWEMA) method which is a combination of the Weighted Exponential Moving Average (WEMA) and Brown's Double Exponential Smoothing (BDES) methods will be used in this study. The data used is the daily data of closing price of the stock (closing price) of PT. Bank Rakyat Indonesia on February 6, 2018 until February 6, 2019. MSE and MAPE BWEMA values were obtained at 6124.222 and 1.831685%, while MSE and MAPE WEMA values were 7559.211 and 1.998439% respectively. The results obtained show that the BWEMA method has smaller MSE and MAPE values. This shows that the BWEMA method is better than the WEMA method in terms of forecasting. As a results the BWEMA method is continued to calculate the forecasts rate of return for the next 7 days. The average value returns obtained is 0.111497% stock which means during the period of the investment, investors get a profit of 0.111497%% per day of the total funds invested in the shares of PT Bank Rakyat Indonesia (Persero) Tbk.
股票可以定义为单方资本以公司资产证明的形式参与公司或有限责任公司的标志，形成有价值的证明函，作为参与资本的声明。回报股票是激励投资者投资或互动的因素之一，也是对投资者承担风险或投资的勇气的奖励。PT Bank Rakyat Indonesia是印尼最大的银行之一，其股价每年都在上涨。布朗加权指数移动平均(BWEMA)方法是加权指数移动平均(WEMA)和布朗双指数平滑(BDES)方法的结合。使用的数据为PT. Bank Rakyat Indonesia在2018年2月6日至2019年2月6日的股票收盘价(收盘价)的每日数据。MSE和MAPE的BWEMA值分别为6124.222和1.831685%，MSE和MAPE的WEMA值分别为7559.211和1.998439%。结果表明，BWEMA方法具有较小的MSE和MAPE值。这表明BWEMA方法在预测方面优于WEMA方法。因此，BWEMA方法继续计算未来7天的预测收益率。获得的平均价值回报为0.111497%股票，这意味着在投资期间，投资者每天获得投资于PT Bank Rakyat Indonesia (Persero) Tbk股票的总资金的0.111497%的利润。
{"title":"Peramalan Rate of Return Saham Menggunakan Metode Brown’s Weighted Exponential Moving Average dengan Optimasi Levenberg-Marquardt","authors":"N. Abdullah, Junaidi, Lilies Handayani","doi":"10.22487/25411969.2019.v8.i3.14955","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i3.14955","url":null,"abstract":"Stocks can be defined as a sign of the participation of unilateral capital in a company or a limited liability company in the form of proof of a company's assets and it is formed as a valueble proof letters as a statement of participating in capital. Return stockis one of the factors that motivates investors to invest or interact and also a reward for the courage of investors to take risks or investments. PT Bank Rakyat Indonesia is one of the largest banks in Indonesia that experiences an increase in stock prices every year. The Brown's Weighted Exponential Moving Average (BWEMA) method which is a combination of the Weighted Exponential Moving Average (WEMA) and Brown's Double Exponential Smoothing (BDES) methods will be used in this study. The data used is the daily data of closing price of the stock (closing price) of PT. Bank Rakyat Indonesia on February 6, 2018 until February 6, 2019. MSE and MAPE BWEMA values were obtained at 6124.222 and 1.831685%, while MSE and MAPE WEMA values were 7559.211 and 1.998439% respectively. The results obtained show that the BWEMA method has smaller MSE and MAPE values. This shows that the BWEMA method is better than the WEMA method in terms of forecasting. As a results the BWEMA method is continued to calculate the forecasts rate of return for the next 7 days. The average value returns obtained is 0.111497% stock which means during the period of the investment, investors get a profit of 0.111497%% per day of the total funds invested in the shares of PT Bank Rakyat Indonesia (Persero) Tbk.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128368185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-08-29DOI: 10.22487/25411969.2019.v8.i2.13544
Mira Bela Islami, Rais Rais, L. Handayani
Health workers is any person who dedicates theirself in the health sector and have knowledge, skills and authority to make health efforts. The lack number of health workers or the univen distribution of health workers is a problem that often occurs in each region. This research will use the method of multidimensional scaling in mapping districts / cities in Central Sulawesi Province based on indicators of health workers. The results obtained are formed in to 4 groups of districts/cities that have similarities among its members but different from other groups. In the group 1 is Palu, Group 2 contained Parigi Moutong districts. In the group 3 consists of Banggai, Poso, Sigi and Toli-Toli Districts. In the group 4 consist of Tojo Una-una, Morowali, Donggala, Morowali Utara, Banggai Laut, Buol, and Banggai Islands. Stress value obtained is 4.354% and the value of R^2 is 99.568%, which indicates that the data used can be mapped properly.
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Pub Date : 2019-08-29DOI: 10.22487/25411969.2019.v8.i2.13546
Lyly Zulraufianti, Asri Pirade Paserang
The research of callus induction in potato (S. tuberosum L.) from Dombu Village with indole-3-acetic-acid (IAA) was conducted from Januari to April 2019 in Laboratory of Tissue Culture, Biology Department, Faculty of Mathematics and Natural Science, Tadulako University. The research was aimed to determine of concentration IAA of the best to induce callus. This study was designed based on Completely Randomized Design (CRD) with 5 treatments, 3 replications and 3 explants on each unit. The treatments were P1= MS + 0 ppm, P2= MS + 0.5 ppm, P3= MS + 1.0 ppm, P4= MS + 2.0 ppm, P5= MS + 3.0 ppm. The results showed that the best and the efficient treatments for induction of callus treatment was P4= MS + 2.0 ppm with to induce callus up to 100%, the callus colour was yellow to brown and intermediate texture.
2019年1 - 4月，在大田大学数学与自然科学学院生物系组织培养实验室对东布村马铃薯(S. tuberosum L.)进行了吲哚-3-乙酸(IAA)诱导愈伤组织的研究。研究旨在确定诱导愈伤组织的最佳IAA浓度。本试验采用完全随机设计(CRD)， 5个处理，3个重复，每个单元3个外植体。处理为P1= MS + 0 ppm、P2= MS + 0.5 ppm、P3= MS + 1.0 ppm、P4= MS + 2.0 ppm、P5= MS + 3.0 ppm。结果表明，P4= MS + 2.0 ppm是诱导愈伤组织的最佳和有效处理，愈伤组织诱导率高达100%，愈伤组织颜色为黄至棕色，质地中等。
{"title":"Induksi Kalus Kentang Asal Desa Dombu (Solanum tuberosum L.) Dengan Zpt Indole-3-Acetic Acid (IAA)","authors":"Lyly Zulraufianti, Asri Pirade Paserang","doi":"10.22487/25411969.2019.v8.i2.13546","DOIUrl":"https://doi.org/10.22487/25411969.2019.v8.i2.13546","url":null,"abstract":"The research of callus induction in potato (S. tuberosum L.) from Dombu Village with indole-3-acetic-acid (IAA) was conducted from Januari to April 2019 in Laboratory of Tissue Culture, Biology Department, Faculty of Mathematics and Natural Science, Tadulako University. The research was aimed to determine of concentration IAA of the best to induce callus. This study was designed based on Completely Randomized Design (CRD) with 5 treatments, 3 replications and 3 explants on each unit. The treatments were P1= MS + 0 ppm, P2= MS + 0.5 ppm, P3= MS + 1.0 ppm, P4= MS + 2.0 ppm, P5= MS + 3.0 ppm. The results showed that the best and the efficient treatments for induction of callus treatment was P4= MS + 2.0 ppm with to induce callus up to 100%, the callus colour was yellow to brown and intermediate texture.","PeriodicalId":399499,"journal":{"name":"Natural Science: Journal of Science and Technology","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129773813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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