bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aplikasi Metode Grey Forecasting Pada Peramalan Kebutuhan Bahan Bakar Alternatif Ramah Lingkungan di PT. Indocement Tunggal Prakarsa Tbk
Authors: Nariswari Nanda Lokita , Rosyidi Cucuk Nur 
Published: June 2018

<span><em>Forecasting is one of the methods required by a company to plan the demand of raw materials in the </em><span><em>future, in order to avoid the emergence of various problems such as stock out. However, not all </em><span><em>forecasting methods can be used to forecast demand in the short term a specially a condition where the </em><span><em>company only has a few historical data. Grey method is a forecasting method which can be used to </em><span><em>predict the short-term demand. The purpose of this study is to determine how well the Grey method used </em><span><em>to predict the demand of alternative energy and compared with other forecasting methods. Mean Squared </em><span><em>Error (MSE) is used as a measure of the goodness of the method. The result of the study indicates that the </em><span><em>Grey Forecasting Methods MSE value that is smaller than other time series forecasting methods.</em></span></span></span></span></span></span></span><br /></span>
Pemilihan Strategi Pemasaran dan Prediksi Pangsa Pasar Produk Pakaian Batik Menggunakan Rantai Markov (Studi Kasus: Toko Putra Bengawan Kampung Batik Laweyan Solo)
Authors: Rosyidi Cucuk Nur , Indah Fitriana , Budijanto Murman 
Published: June 2018

<span><em>Competition in the business world becomes more intense, both in manufacturing and services. It requires </em><span><em>manufacturers to constantly innovate and have new breakthroughs in business. Likewise, the batik </em><span><em>industry which is one part of the business world, it will experience a business environment which is full of </em><span><em>competition and the competition is expected to continue to rise. The purpose of this study is to select the </em><span><em>best marketing strategy derived from the marketing mix and retail using pair wise comparisons, then </em><span><em>determines a strategy for optimal market share using Markov Chain. The results showed that the optimal </em><span><em>strategy is discounted price. From the results of the analysis, the batik consumers in Kampung Batik </em><span><em>Laweyan sensitive to price cuts strategy that results in the maximum market share.</em></span></span></span></span></span></span></span><br /></span>
Implementasi Toyota Business Practices (TBP) pada Permasalahan Proses Produksi Industri Karak Rumahan
Authors: Radite Petra , Priadythama Ilham , Fahma Fakhrina 
Published: June 2018

<span><em>Karak is one of food products favored by many indonesians. Demands for this traditional meals is still </em><span><em>high especially in the rainy season, so this food is good to be developed. In some karak cottage </em><span><em>industries especially in urban areas, their production process has advanced, but they are still unable to </em><span><em>fulfill high demand. In this research, Toyota Business Practices (TBP) is used to identify the root cause </em><span><em>problem and propose improvement actions for the problem. Based on TBP’s results, the problem occurs </em><span><em>in the cutting station where there are 900 pieces of karak which are too small or large and sloping. The </em><span><em>root cause problem identified are the lack of a standard size for karak and equipment used is still a </em><span><em>regular knife. Accordingly, the proposed corrective action are the creation of standards karak size and </em><span><em>design of cutting tools to increase productivity and neatness in the cutting station.</em></span></span></span></span></span></span></span></span><br /></span>
Analisis Penggunaan Peramalan dalam Meminimalkan Biaya Simpan Produk Linzhi Plus pada CV. HN
Authors: Syakura Abdan , Hendaryani Oktiviandri , Ramadhan Rafiq 
Published: June 2018

<em>CV. HN is a manufacturer of herbal supplements which products are mostly made from mushroom. Lingzhi Plus is one of their products. The product inventory data from October 2014 until September 2015 showed that the monthly average production was 111 units, the monthly average sales was 103 units, and the remaining product inventory at the end of the year was 108 units. The products that approaching the expiration date will be sold with a discount of 20%. The high amount of remaining products leads to high production and storage cost. Therefore, companies should resolve the inventory control problem. This study proposes a method for controlling inventory and production by selecting the best demand forecasting method. The forecasting method MA4 shows the smallest error value which is known from MAD value of 30.66. By using the proposed method of forecasting, the company will earn saving of Rp 915,939.40 of inventory cost</em>
Penerapan Metode Analytic Network Process (ANP) untuk Mengatasi Keterlambatan Pengadaan Barang pada Bagian Umum di PT Solo Grafika Utama
Authors: Nugroho Aris Wahyu , Widhianggitasari Rizqy , Priadi David Fu’ani , Laksono Pringgo Widyo 
Published: June 2018

<em>Procurement activities of raw materials is one of the vital activity for the company. PT Solo Grafika Utama is one of the companies that rely heavily on this procurement activity for a smooth production. Until now PT Solo Grafika Utama has been working with several suppliers in the procurement of raw materials production. However, in practice, these activities often experience problems such late delivery by suppliers for various things. As a result of delays in the procurement materials makes the production process is hampered or delayed, so the time that required for production process exceeded the production schedule planning that has been set before. This resulted in the delivery of products to consumers experienced delays and it makes them are not satisfied with the performance of the company. Therefore we need an analysis to determine the factors that cause the delay. Once the cause is known, we need a follow-up analysis in order for the supplier selection decision making process of PT Solo Grafika Utama using ANP method. Supplier selection decision-making process of the raw materials in PT. Solo Grafika Utama involves many criteria and sub-criteria assessment which is then compared and processed to obtain the supplier with the highest value and become preferred suppliers for the company.</em>
THE ROLE OF INTEGRATED ISLAMIC COMMERCIAL AND SOCIAL FINANCE FOR CURBING CREDIT CYCLES AND ACHIEVING MACROPRUDENTIAL OBJECTIVE
Authors: Widodo Arif 
Published: June 2018

It is widely believed that Islamic finance is inherently stable since the principle of risk-sharing and linking the financial to real counterpart in particular through its social finance are applied, hence the financial stability may successfully be attained. If mimicking the conventional finance, Islamic model will probably be facing instability, following the financial cycle. There has been a growing literature discussing credit cycle in mainstream perspective since 2008 global financial crash. However, it is quite rare to find study, in macro context, on credit cycles and the effectiveness of integrated Islamic commercial and social finance in achieving macroprudential objective: curtailing excessive credit. This study is designed to empirically examine the characteristics of cycles stemming from conventional and Islamic credit whether both have similar trend and also to investigate how the integrated Islamic commercial and social finance may be effective to hamper such cycles. By employing Hodrick-Presscot Filter, Markov Switching and Vector Error Correction Model, this study demonstrates that, in terms of cycle, Islamic model cycle has certain similarities with conventional counterpart since it functions under similar financial environment despite the fact that Islamic has less amplitude compared with conventional credit. Both credit and financing cycles tend to grow rapidly (excessive) several months before global financial crisis happened in 2008. This means that, in a dual banking system, credit and financing boom may precede financial crisis. Moreover, it is apparent also that the integrated Islamic finance is proven to be effective in curbing credit growth due to the effectiveness of both macroprudential instrument applied in banking sector and social finance in safeguarding financial stability.
Keywords: Credit cycle, Macroprudential policy, Markov Switching, HP filter
JEL Classification: E32, E51, G29
EVALUATION OF TAKĀFUL OPERATORS’ EFFORTS IN REALISING MAQASID AL- SHARĪʿAH
Authors: Hasan Rashedul , Ahmad Abu Umar Faruq , Nordin Haziq Bin 
Published: June 2018

Takāful has emerged as a Sharīʿah-compliant alternative to conventional insurance, which is embedded in realising its underlying maqasid (goals or objectives) of Sharīʿah. Contrary to previous studies that attempted to provide evidence that takāful products are compliant with the Sharīʿah in practice of takāful operators (TOs), this paper seeks to take a different approach to investigate their compliance with the fulfilment of the three broad categories of maqasid al-Sharīʿah. In light of the theoretical perspectives of maqasid, each objective was operationally defined for statistical analysis. Six TOs from Malaysia were selected, and five-years’ data (2011-2015) have been collected from World Bank’s websites and annual reports. Secondary data were analysed through balanced panel data approach. Hausman test results indicate that fixed effect model is more appropriate in explaining the explored phenomena. Taxes paid by TOs were found to have a significant positive impact on economic growth and poverty alleviation while payment of zakah found to have a negative impact. The prohibition of riba (interest) should not be the only decisive difference between Islamic finance and its conventional counterpart. Islamic banks (IBs) and TOs are accountable toward Allah, and thus their activities should be directed toward the fulfilment of maqasid al-Sharīʿah. While earlier published literature has explored efficiency and profitability of TOs, the current paper has attempted to focus on the ability of TOs in serving the maslaha (public interest/common good of the community).
Community Consensus: Volunteerism - The SPE Strength That Lets Me Sleep Soundly at Night
Authors: Spady Darcy 
Published: June 2018

President's column
We have a strong future, thanks to hard-working young members
What keeps you awake at night?
That is a question often posed by one of my favorite SPE presidents ever, Helge Hove Haldorsen. Of course, he was usually referring to an area of risk or danger. I ask that question of myself often. Sometimes I even answer myself.
But today I want to turn that question around—what helps you sleep at night? For me, it’s knowing that the future of SPE is safe in the hands of the Millennial generation. Yes, the Millennials. Contrary to what you may have been led to believe, our young professionals are enterprising volunteers. Globally, this group is bringing volunteerism to new heights because they believe in blending their personal and professional lives to help others.
Recently, I witnessed one of the best volunteerism demonstrations across our organization: the Kingdom of Saudi Arabia (KSA) section’s Annual Technical Symposium and Exhibition hosted yearly in Dhahran, Saudi Arabia. It dawned on me while attending the ATS&E that a worry over the supposed lack of global volunteerism is not something that keeps me awake at night. In fact, SPE’s volunteer culture helps me to sleep at night.
Over these past 5 years, I have served on SPE’s international board first in the capacity of Canadian regional director and now as 2018 president. I cannot recount the number of vigorous (not necessarily rigorous) discussions over the state of volunteerism, mostly in the negative. The narrative often goes like this:
The _____ conference has been going for 10 years (or 20, or 30), and this same group of volunteers has run it. Now that they are all retiring or moving away, there is no way this conference can continue.
Or:
With the reduction in regional directors and/or SPE staff, there is no way this event can continue. The new generation just does not understand volunteerism.
And the best one of all (one that I am guilty of saying):
With the spreading of SPE to all parts of the globe where national companies dominate, how are we ever going to have volunteer events?
All I can say is wrong, wrong, and wrong. I can clearly say that volunteerism is alive and well everywhere in the SPE world. Today’s youth—both professionals and students—embrace volunteering, but they make it their own. It may not be the way we in the older generations define volunteering; however, not only does it work, but their methods also succeed. Let me give some examples.
Technology Focus: Coiled-Tubing Applications (June 2018)
Authors: Crabtree Alex 
Published: June 2018

Technology Focus
Coiled-tubing drilling (CTD) was a very active area of operations years ago, but it seems to have gone through a lull recently, certainly in terms of active geographic areas. However, if the papers presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition this March are anything to judge by, then CTD seems to be regaining some interest in the broader market.
The application of CTD in the papers featured in this issue and in the recommended additional reading highlight its use in more niche areas.
Paper SPE 189904 details the use of CTD to access marginal and bypassed reserves. Although the fields may be marginal, the effect within the US is not. As stated in the Interstate Oil and Gas Compact Commission’s 2012 report, “The hypothetical elimination of $30.8 billion in marginal oil and natural gas production in 2012 would trigger an estimated direct loss of 95,442 jobs and $4.62 billion in earnings within the oil and natural gas industry.” Accessing these potential resources spawned several projects sponsored by the US Department of Energy in the mid-1990s.
A well re-entry and sidetrack CTD operation in New Zealand is reviewed in paper SPE 189930. A niche CTD application in Australia is explored in paper SPE 189918, which revisits the placement of the coiled-tubing reel directly above the injector, with some new, unique features.
Another operational area that is enjoying a continued level of high activity is milling with coiled tubing. This is being combined increasingly with real-time downhole telemetry made available at surface. Real-time communication with coiled-tubing bottomhole assemblies has enabled engineers and operations personnel to evaluate and optimize milling through increased understanding and interpretation of data streams. Papers SPE 189910 and SPE 189942 both detail such applications, each using differing telemetry methods.
In the oil and gas industry in general, a considerable focus is being placed on well abandonment and its associated cost, especially offshore. Around the globe, well operators are developing alternatives to using traditional rigs, and, in many instances, coiled tubing is being used to perform partial or full well plugging. Alternative well-plugging materials and methods continue to be developed that could be used with coiled tubing. A 13-well, 10-month campaign of well abandonment in Norway is reviewed in paper SPE 189956.
Recommended additional reading at OnePetro: www.onepetro.org.
SPE 189918 The Coiled-Tubing-Drilling Rig for Mineral Exploration by S. Soe, Deep Exploration Technologies Cooperative Research Centre, et al.
SPE 189930 Coiled-Tubing Drilling: Case Study, New Zealand by Soheil Kariminejad, Tag Oil, et al.
SPE 189942 First Time Coiled-Tubing Milling in 7-in.-Monobore Gas Well Using Downhole Real-Time Measurements by W.R. Tapia, Schlumberger, et al.
Engineering Approach To Designing Fluid Diverters: Jamming and Plugging
Authors: Wilson Adam 
Published: June 2018

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 187433, “An Engineered Approach To Design Biodegradable Solid-Particulate Diverters: Jamming and Plugging,” by Mojtaba P. Shahri, Jian Huang, SPE, Clayton S. Smith, SPE, and Francisco E. FragachÁn, SPE, Weatherford, prepared for the 2017 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 9–11 October. The paper has not been peer reviewed.
Fluids introduced into a reservoir for stimulation typically take the path of least resistance and, therefore, frequently go into areas with open flow paths. In many cases, those areas are not the targets of stimulation. To maximize contact between the fluid and intact rock, existing fluid paths must be plugged to divert the fluid. A typical fluid-diversion application can be divided into three steps: placement downhole, downhole plugging/diversion, and corresponding stimulation. The aim of this paper is to review and identify critical parameters controlling the downhole plugging/diversion step.
Jamming and Plugging Efficiency
Successful diversion can be designed and achieved upon full understanding of the jamming and plugging mechanisms that occur at the entrance of existing flow paths. An understanding of the underlying physics of this process allows a system to be modeled that uses the minimal amount of material to create temporary but stable seals that can withstand significant pressure differentials even at flow path openings that are several times larger than the mean particle size. Many complex factors affect diversion efficiency, and they all can be adjusted to minimize flow into existing and highly conductive flow channels. Two major mechanisms control the success of the diversion process: jamming and plugging.
In the first stage of fluid diversion within an opening, a stable and jammed structure should be formed by the larger of the particles, which are progressively deposited from a flowing system. In the jamming stage, an initial stable structure is established around an opening (e.g., a perforation during fracturing, a natural fissure, or wormhole during acidizing). The so-called jammed state refers to a configuration in which relatively large particles provide support for one another, remain immobile, and do not pass through the existing opening. As shown in Fig. 1a, the passage of sheep through a gate and the possibility of jamming can be used as an analogy. The size, number, shape, and rate of sheep passing through the gate can determine the possibility of jamming for a specific gate size. Although the passing of relatively large particles (the sheep) is restricted in this stage, fluids and smaller particles (small lambs) can still move through the opening (gate) by using the space between the large particles. Therefore, jamming does not necessarily restrict fluid nor, hence, pressure communication.
Technology Focus: EOR Operations (June 2018)
Authors: Goodyear Stephen 
Published: June 2018

Technology Focus
Carbon-dioxide (CO2) injection is a successful enhanced-oil-recovery (EOR) technology that has been deployed extensively in the Permian Basin of West Texas, enabled by CO2 mostly produced and transported from naturally occurring CO2 reservoirs in Colorado and New Mexico.
Further expansion of CO2 EOR has been limited by the availability of affordable CO2 rather than the existence of suitable target reservoirs for redevelopment with CO2 EOR. The US Department of Energy estimates that 67 billion STB of economically recoverable next-generation CO2-EOR oil exist in US conventional reservoirs, with significant potential identified in other oil provinces around the world.
This situation may be about to change. On 9 February, Congress passed and the president signed into law a budget agreement that included language to expand a 2009 tax credit for CO2 capture and storage known as 45Q. The key provisions are that, for stored CO2, the tax credit rises to $50 per tonne in 2027, while, for EOR, the equivalent value is $35. The amounts will be adjusted for inflation after 2026. The tax credit is per tonne of CO2 captured as long as it can be established that the CO2 was stored. The tax credit is transferable, hence nontax-paying entities or entities that have no tax liability can benefit from the program. The credit goes to the facility that captures the CO2 and is available for the first 12 years of operation. There is no cap on the arrangement for the tax-credit projects coming online after 2018 or for which construction has started before 2024.
As a result, the US now has a carbon-pricing mechanism that could well be enough to unlock a wave of innovative CO2-capture projects and lead to a significant expansion in CO2 EOR, ultimately leading to new infrastructure, storage sites, and technology improvements that give birth to a CO2-capture industry.
Recommended additional reading at OnePetro: www.onepetro.org.
SPE 185526 Surveillance and Initial Results of an Existing Polymer Flood: A Case History From the Rayoso Formation by L.A. Martino, YPF, et al.
SPE 188363 A Field Case Study of an Interwell Gas Tracer Test for Gas-EOR Monitoring by Modiu Sanni, Saudi Aramco, et al.
SPE 185734 Case Histories of Solvent Use in Thermal Recovery by Bita Bayestehparvin, University of Calgary, et al.
The application of ensemble precipitation forecasts to reservoir operation
Authors: Peng Anbang , Zhang Xiaoli , Peng Yong , Xu Wei , You Fangfang 
Published: June 2018

Abstract
Although inflow forecasts are useful information that can be used for improving reservoir operation efficiency, uncertainty is still a challenge for getting sound operation results. Ensemble precipitation forecasts can take uncertainties under consideration, so they have been a research topic for improving reservoir operations. In this paper, a rainfall–runoff model, combined of a multiple linear regression model (for non-flood seasons) and the Xinanjiang model (for flood seasons), for inflow forecasts and a stochastic dynamic programming model for reservoir operations are developed in order to effectively use the ensemble precipitation forecast. To explore the best way for using the ensemble precipitation forecast, two post-processing techniques, i.e., ensemble forecast averaging (EFA) and interval value (IV), are tested. The ensemble precipitation forecast from the European Centre for Medium-Range Weather Forecasts (ECMWF) was chosen due to its high accuracy, and the Huanren reservoir, located in China, was used to test the newly developed models. The results show that, compared with the traditional rule curve, hydropower generation increases by 4.86% and 4.55%, respectively, when EFA and IV are used, which indicates that the use of ensemble forecasts facilitates considerable improvements in operating performance.