GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Marginal Substitution and Allocative Efficiency Evaluation of Rice Farming Applying Organic Fertilizer In Swampy Land Banyuasin Regency, South Sumatera Province, Indonesia
    IOP Publishing ; 2022
    In:  IOP Conference Series: Earth and Environmental Science Vol. 995, No. 1 ( 2022-04-01), p. 012056-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 995, No. 1 ( 2022-04-01), p. 012056-
    Abstract: The growing awareness of the negative impact of using inorganic fertilizers on the environment in a small number of rice farmers has made them switch from conventional to organic farming. So far, economic research on the application of organic fertilizers has been widely carried out in irrigated rice fields. Economic research on the application of organic fertilizer use in tidal and lebak land areas has not been widely carried out. Differences in land types are expected to affect the amount of use of organic fertilizers and are also thought to affect production yields and income levels. The purpose of this study was to analyze the reduction in the use of inorganic fertilizers for rice farmers using organic fertilizers and their marginal substitution, as well as the impact of using organic fertilizers on the costs and income of rice farmers using organic fertilizers in tidal and lebak land. This research was conducted in Telang Sari Village, Tanjung Lago District and Sako Village, Rambutan District, Banyuasin Regency, South Sumatra Province, Indonesia. Data was collected in April 2021. The research method was a survey with proportional stratified random sampling. The results showed that (1) the highest reduction of inorganic fertilizer in tidal land was 65.4 percent, while in lebak land it was 57.6 percent; the cost of production factors in tidal and lebak and areas increased by 4.94% and 18.56%; The income of rice farmers in lebak land increased by 60.58%, while on tidal land it was only 32.94%, (2) The marginal substitution of organic fertilizers to inorganic fertilizers was -2.61 and -5.68, (3) The use of these factors production for farmers who use organic fertilizers in both tidal and lebak land have not been efficien yett. The use of factors of production must be increased to obtain optimal profits.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/995/1/012056
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2434538-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Trends of significant wave height and sea level in the southern water of the Special Region of Yogyakarta
    EDP Sciences ; 2020
    In:  E3S Web of Conferences Vol. 200 ( 2020), p. 02025-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 200 ( 2020), p. 02025-
    Abstract: Coastal zone is very vulnerable to the impacts of climate change. The increase of sea wave and sea level rise threaten coastal zone. The purpose of this study is to determine trends of significant wave height and sea level in the southern waters of the special region of Yogyakarta. The data used consists of daily significant wave height from 2010-2018, weekly absolute dynamics topography from 2005-2018 and daily surface wind from 2010-2018. Trends of significant wave height and sea level were analyzed by using linear regression. The results showed that significant wave height during the east season until the second transition season was higher than the west season and the first transition season. Vice versa, sea level during the east season until the second transition season was lower than the west season and the first transition season. Trends of significant wave height has increased of 0.63 cm/year, meanwhile sea level rise reached 0.82 cm/years.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/202020002025
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2020
    detail.hit.zdb_id: 2755680-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Development of Power Electronic Practicum Units for Vocational Education
    IOP Publishing ; 2021
    In:  Journal of Physics: Conference Series Vol. 1737, No. 1 ( 2021-01-01), p. 012043-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 1737, No. 1 ( 2021-01-01), p. 012043-
    Abstract: The purpose of this research is to develop a Power Electronics practicum unit in the Department of Electrical Engineering Education, Faculty of Engineering, YSU, so that it is suitable and feasible to be applied in vocational education learning by considering the safety aspects of the components and their users. The development includes a three-phase AC source voltage drop from 45 volts to 24 volts per phase, load replacement, the use of up and down voltage converters with greater current capability, and a direct voltage power supply without a transformer switching model. The method used is research & development with technical tests for each part of the module according to the purpose of setting up the practicum unit. The research results were obtained; the power supply with a 24 volt AC source is able to supply a current of 3.63 amperes at a direct voltage of 20 volts with a voltage drop of 0.5 volts, a direct voltage lowering converter is able to change the voltage from 15 volts to 6 volts at a current of 3.66 amperes, with a voltage drop of 0.13 volts. A direct voltage booster converter is able to convert a voltage of 15 volts from 1.78 amperes to 25 volts with a voltage drop of 0.1 volts. The four-pole three-phase motor can be controlled via the TRIAC from zero rotation to maximum rotation, the protection system is capable of breaking the fuse instantaneously in the event of a faulty connection from phase-neutral to phase, followed by disconnection of the 24-volt three-phase AC power source within one second.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/1737/1/012043
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2166409-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Development of Human Machine Interface (HMI) Training Kit as A Learning Media for Industrial Automation Engineering Practical Courses
    IOP Publishing ; 2021
    In:  Journal of Physics: Conference Series Vol. 1737, No. 1 ( 2021-01-01), p. 012047-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 1737, No. 1 ( 2021-01-01), p. 012047-
    Abstract: Learning media is one of the learning tools that is needed so that the learning process can run smoothly and students can have competencies in accordance with the expected competency goals. This paper discusses: (1) developing a Human Machine Interface (HMI) training kit as a learning medium in the Industrial Automation Engineering Practical Course; (2) the performance of the HMI training kit; (3) the feasibility of the HMI training kit based on the assessment of media experts, material experts and student responses as training kit users. In developing this training kit using the ADDIE model which consists of Analysis, Design, Development, Implementation and Evaluation. Data collection was carried out by testing the performance of the media, and giving a questionnaire to media experts to assess the feasibility of the media aspect, a material expert questionnaire to assess the appropriateness of the material and a questionnaire to determine student responses as users. The data were analyzed by means of quantitative descriptive analysis which were then categorized. The result of this development is HMI practice learning media for industrial automation engineering practice courses which consist of HMI practice hardware, and jobsheets. The performance of the HMI training kit for input and output parameters, visualization of engine control in the form of buttons, sliders, output visualization, indicator lights, and overall graphics have a 100% correct performance. Based on media experts, design aspects, technical aspects and usefulness aspects were rated very well, so that overall the media aspect received an assessment in the very proper category Based on material experts, technical aspects and aspects of usefullness received an assessment in the very good category, so that overall the material aspect received an assessment in the very proper category. Based on assesment of students as users, the average score student response falls into the very good category.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/1737/1/012047
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2166409-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Mini CNC Design to Increase Students’ Programming and Control CNC Competencies
    IOP Publishing ; 2019
    In:  Journal of Physics: Conference Series Vol. 1413 ( 2019-11), p. 012006-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 1413 ( 2019-11), p. 012006-
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/1413/1/012006
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2166409-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Marketing Performance Evaluation of Purun Agroindustry as Peatland Friendly Commodities in South Sumatera
    EDP Sciences ; 2018
    In:  E3S Web of Conferences Vol. 68 ( 2018), p. 03003-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 68 ( 2018), p. 03003-
    Abstract: Researchs related to purun ( Heleocharisfistula ) economic development should be encouraged for peatland sustainability. For long time, purun crafting was marketed traditionally only to traders who already have closebonding to the crafters. So, the research objective were (1) to evaluate the marketing performance, and (2) to design the marketing model’s plan of purun. This research was conducted in Pedamaran Area, Ogan Komering Ilir on September 2017. The result showed the performance of marketing of purun agroindustry in Pedamaran area has not yet all have a level of performance that corresponds to the importance of all marketing actors. There are gaps between performances and importances of marketing performance for atbributes, i.e. commitment in cooperation, profit, sales, prices, information, and skills improvement. The marketing model’s plan of purun are (1) building cooperative institution formally, (2) improving inputs for increasing profit, and (3) introducing e-commerce.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/20186803003
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2018
    detail.hit.zdb_id: 2755680-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Performance of Frequency Regulation on Power in the Development of Variable Speed Drive Training Kit as a Learning Media for Motor Control Practices
    IOP Publishing ; 2021
    In:  Journal of Physics: Conference Series Vol. 2111, No. 1 ( 2021-11-01), p. 012036-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2111, No. 1 ( 2021-11-01), p. 012036-
    Abstract: This study develops a variable speed drive training kit for electric motor control practice media in vocational education. This is research and development with the ADDIE model. The stages of the ADDIE model carried out are Analyze, Design, Development, Implementation, and Evaluation. A Variable Speed Drive (VSD) system consists of two panels, 1) a Variable Speed Drive panel and 2) a control and metering panel. The VSD Training kit module unit using Altivar 71 is a learning medium about electric motor control systems. The VSD Training kit can work well based on trials. The test results of the training kit variable speed drive function test show that at a frequency of 20 Hz, the magnitude of the current in the R, S, and T phases get the lowest value.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2111/1/012036
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2166409-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Rain Scanner Radar and Optical Flow Combination For Early Identification of The Incoming Bow Echo Heavy Precipitation
    IOP Publishing ; 2023
    In:  IOP Conference Series: Earth and Environmental Science Vol. 1245, No. 1 ( 2023-09-01), p. 012031-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 1245, No. 1 ( 2023-09-01), p. 012031-
    Abstract: In this study, heavy precipitation in the form of bow echo is observed, identified, and tracked using a rain scanner and optical flow method. Two case studies of bow echoes with a range of properties from 15 to 33 km were observed in the afternoon on 1st February and 4th February 2021. The rain scanner developed based on X-band radar could obtain the first detection of the bow echo shape. The difference between these two bow echoes events is from their initiation. The first bow echo cases are initiated from weakly organized cells. Meanwhile, the second case of bow echo is initiated from a squall line event. Bow echo is initially observed in the western part of Bandung city. Approximately twenty minutes after the first detection, the bow echo passed the center of Bandung city. Image processing using edge detection could track the bow echo from the radar data. Applied Lucas-Kanade optical flow was then used to retrieve the bow echo movement. Vector flow from optical flow showed the dominant movement toward the east direction in both case studies. A simple method to predict the incoming time of the bow echo using the estimated speed from vector flow and the image translation is also presented.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/1245/1/012031
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2434538-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Farmer’s welfare in Telang’s integrated independent city: lesson learned from migrant and local farmers in tidal land, South Sumatera
    IOP Publishing ; 2018
    In:  IOP Conference Series: Earth and Environmental Science Vol. 122 ( 2018-02), p. 012013-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 122 ( 2018-02), p. 012013-
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/122/1/012013
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 2434538-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Analysis of Radiosonde Temperature Profile Measurement in Pamengpeuk
    IOP Publishing ; 2019
    In:  Journal of Physics: Conference Series Vol. 1373, No. 1 ( 2019-11-01), p. 012003-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 1373, No. 1 ( 2019-11-01), p. 012003-
    Abstract: Indonesia is a tropical maritime country that has high complexity in terms of atmospheric dynamics. Understanding of atmospheric conditions is very important to obtain valid knowledge and atmospheric models. This understanding can be obtained through adequate data support. Vertical atmospheric data is very limited so it is necessary to develop equipment to be able to measure and provide valid data. one of the equipment used to measure the atmosphere vertically is called radiosonde. The development of this radiosonde has been carried out by various parties, one of them by PSTA LAPAN. This development is focused on the antenna system and the accuracy of the temperature data received. The antenna that is designed is an Omni 5/8λ antenna integrated with LNA. Receiving radiosonde data using antenna up to a height of 36 km. The temperature data that has been obtained is validated using radiosonde Vaisala and Meisei data. The temperature analysis is done by using Mean Bias Error (MBE) and Root Mean Square Error (RMSE). After being compared with the reference data, the RMSE values of 1.2 and MBE 2.3 were obtained with a correlation of 0.9. From these results it can be seen that the temperature data obtained is in accordance with atmospheric conditions, so this temperature sensor can be used for vertical atmospheric measurements.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/1373/1/012003
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2166409-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...