scholarly journals Liberating microfossils from indurated carbonates: comparison of three disaggregation methods

2020 ◽  
Vol 39 (2) ◽  
pp. 169-181
Author(s):  
Charlotte Beasley ◽  
Daniel B. Parvaz ◽  
Laura Cotton ◽  
Kate Littler
Keyword(s):  
Acetic Acid ◽  
United Arab Emirates ◽  
Sedimentary Rock ◽  
Best Practice ◽  
Processing Time ◽  
Electric Pulse ◽  
Larger Foraminifera ◽  
Short Processing Time ◽  
Effectiveness And Efficiency ◽  
Tethys Ocean

Abstract. Three disaggregation methods, i.e. Calgon, acetic acid and electric pulse fragmentation (EPF), have been applied to a range of heavily lithified, carbonate-rich sedimentary rock samples of Paleogene age. Samples are predominantly from the carbonate-rich, shallow water domain (<250 m palaeo-water depth) of Tanzania, Malta and the United Arab Emirates (Paleogene Tethys Ocean). The effectiveness and efficiency of each method has been compared, in addition to the preservation of the resultant liberated microfossil material (primarily larger foraminifera; LF). Of the three methods, the most efficient and effective was EPF, which liberated the largest number of LF in a very short processing time and resulted in the best preservation. Samples with calcitic, silicic, and clay matrices and cements were successfully disaggregated using EPF. In this study, recovered microfossils were largely >500 µm, suggesting this technique may be more appropriate for liberating larger microfossils (e.g. LFs); however, we discuss nuances to the method that would allow for more effective recovery of smaller microfossil specimens. The more traditional acetic acid method was also able to disaggregate a number of the samples; however, preservation of the LF was compromised. We suggest a best-practice methodology for implementing EPF in micropalaeontological studies.

scholarly journals PENETAPAN STANDAR WAKTU PROSES DALAM MENINGKATKAN EFEKTIFITAS DAN EFISIENSI PADA PERUSAHAAN KRUPUK LEZAT DESA SUWALAN KECAMATAN JENU KABUPATEN TUBAN

MANAJERIAL ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 9
Author(s):  
Louse Happy Amira Salatnaya
Keyword(s):  
Production Process ◽  
Processing Time ◽  
Field Research ◽  
Process Time ◽  
Time Study ◽  
Study Analysis ◽  
Analysis Techniques ◽  
Standard Time ◽  
Effectiveness And Efficiency ◽  
Standard Production

This study examines the standard setting of processing time in increasing effectiveness and efficiency. The standard time is the time needed to complete a certain task at a speed that continues without causing bad results. The purpose of this study is to set a standard production process time to achieve effectiveness and efficiency of production. This research is a study that combines field research and literature. Methods of data collection using observation, interview and documentation techniques, while data analysis techniques using time study analysis. The results showed that the standard time of 860 minutes that had been determined by the company was a deviation of the time study of + 8% so that the realization of the next production process, the company could save on the use of production process time of 66.76 minutes.  

scholarly journals Applying Response Surface Methodology to optimize the decarbonization process of Timahdit oil shale

2019 ◽  
Vol 8 (5) ◽  
pp. 372-379 ◽  
Author(s):  
Laila Makouki ◽  
Meriem Tarbaoui ◽  
Samia Glissi ◽  
Said Mansouri ◽  
Hassan Hannache ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Acetic Acid ◽  
Response Surface ◽  
Oil Shale ◽  
Processing Time ◽  
Texture Evolution ◽  
Optimal Conditions ◽  
X Ray ◽  
Decarbonization Process ◽  
Scanning Electron

The present article aims to optimize the decarbonization of Timahdit oil shale layer Y by removing carbonates from the raw rock using acetic acid. The response surface methodology “central composite design (CCD)” has been used as a method of optimization to study the 3 factors of the process. The factors studied are the concentration of the acid, the processing time, and the ratio (liquid/solid). The optimal conditions with 68.17% of residue rate are obtained with 2 mol/l as concentration, 120 min as a time of treatment and 10.02 for the ratio.The raw (Y) and optimized materials (YO) were characterized by Scanning Electron Microscopy (SEM), X-ray fluorescence (XRF) and X-ray diffraction (XRD). The results showed that the acetic acid used to remove carbonates affects the chemical composition and the texture evolution of the residues.

A Study of Fenton’s Oxidation Pretreatment on Dye Wastewater Containing Acetic Acid

2014 ◽  
Vol 1044-1045 ◽  
pp. 215-218
Author(s):  
Xian Huan Qiu ◽  
Hai Yu ◽  
Peng Fei Deng
Keyword(s):  
Acetic Acid ◽  
Processing Time ◽  
Ph Value ◽  
Removal Rate ◽  
Cod Removal ◽  
Dye Wastewater ◽  
Fenton’S Oxidation ◽  
Effects Of Ph ◽  
Cod Removal Rate ◽  
Fenton's Oxidation

In the presence of acetic acid, the effects of pH, processing time, addition of Fe2+ and H2O2 on dye wastewater treatment were studied. Experimental results showed that in the presence of acetic acid, when the pH value was 4, the processing time was 30.0min, addition of ferrous sulfate was 4.8g/L, and addition of hydrogen peroxide was 56mL/L, the treatment effect was the best, COD removal rate reached 51.0%. Further studied of the effect of the presence of acetic acid on Fenton’s oxidation of dye wastewater, the results showed that without of acetic acid, the COD removal rate was higher than that with acetic acid. And the effect of Fenton's reagent on oxidation of dye substances was interfered by the presence of acetic acid.

Risk disclosure and financial performance: the case of Islamic and conventional banks in the GCC

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ayman E. Haddad ◽  
Hussain Alali
Keyword(s):  
Financial Performance ◽  
United Arab Emirates ◽  
Best Practice ◽  
Annual Reports ◽  
Risk Disclosure ◽  
Return On Assets ◽  
Content Type ◽  
Return On Equity ◽  
Gcc Countries ◽  
Conventional Banks

Purpose This study aims to explore the extent of risk disclosure (RD) among conventional banks (CBs) and Islamic banks (IBs) listed on stock markets in the Gulf cooperation council (GCC). It also examines the influence of RD on the banks’ financial performance as measured by return on assets (ROA) and return on equity (ROE). Design/methodology/approach This study uses content analysis to examine RD in the annual reports of 16 CBs and 14 IBs in the GCC for a sample of 240 firm-year observations over the period 2007 to 2014. Findings The study shows no significant differences between the RD reported in the annual reports of CBs and that of IBs. On average, a CB reported 234 sentences while an IB disclosed 244 sentences of RD in its annual report. The authors also find that both types of banks had an upward trend over the periods. While the means of RD reported by CBs have significantly improved over the period, the RD reported by IBs has not. Similar results are also found when the authors compared the RD pre- and post-financial crisis period. Finally, the authors find that there is a significant association between RD and both models of financial performance (ROA and ROE) for IBs, after controlling other variables. However, RD has a significant association with only ROE for CBs. Research limitations/implications The bank selection was restricted to publicly traded banks in the GCC. Other financial institutions and different types of industries were not considered. Further research could determine whether the results obtained in this study could be generalized to different industries in the GCC and or in other countries. Practical implications This study provides evidence on the significant association between RD and the financial performance of CBs and IBs in GCC countries. This study could be helpful to regulatory authorities in encouraging banks to adopt the best practice of RD and thus promote banks’ transparency. Originality/value This is the first known study to examine the RD practices of both types of banks and their association with banks’ financial performance in five-GCC countries (Kuwait, Qatar, Saudi Arabia, United Arab Emirates and Bahrain), based on a longitudinal analysis of year-end annual reports, covering eight years period from 2007 to 2014.

scholarly journals USULAN PENJADWALAN PRODUKSI PRODUK ST 37777 PT EBAKO NUSANTARA PADA DEPARTEMEN SMOOTHMILLING UNTUK MEMINIMASI MAKESPAN

2018 ◽  
Vol 13 (1) ◽  
pp. 61
Author(s):  
Mellysa Asmawar
Keyword(s):  
Production Process ◽  
Processing Time ◽  
Manufacturing Industry ◽  
Job Scheduling ◽  
Makespan Minimization ◽  
Central Java ◽  
Short Processing Time ◽  
Jobshop Scheduling ◽  
Machine Work

AbstrakProses produksi ST 37777 di PT Ebako Nusantara menggunakan jadwal yang didasarkan oleh proses-proses yang dilakukan dengan menggunakan data historis yang telah ada dari proses produksi yang telah dilakukan. PT Ebako Nusantara merupakan industri manufaktur yang bergerak di bidang furnitur yang berlokasi di Terboyo, Semarang, Jawa Tengah. Dalam proses produksi ST 37777, terdapat 11 mesin dan 16 job dimana setiap job memiliki urutan mesin yang berbeda. Penjadwalan yang ada untuk produk tipe ST 37777 dengan tipe jobshop belum menerapkan suatu ketetapan dalam penentuan waktu dan urutan pengerjaan mesin yang efektif sehingga masih banyak job yang selesai terlambat. Untuk itu diperlukan suatu penjadwalan mesin yang efektif sehingga dapat memenuhi waktu produksi pesanan sesuai dengan yang telah disepakati. Penjadwalan jobshop diperlukan untuk memaksimumkan efisiensi dan utilitas sumber daya di lantai produksi. Penentuan jadwal mesin ini bertujuan meminimasi makespan dengan menggunakan Software WINQSB modul job schedulling. Metode yang digunakan adalah metode Short Processing Time. Hasil penjadwalan menggunakan Software WINQSB diperoleh makespan menjadi 15 jam dengan hasil penjadwalan tersebut tidak ada job yang terlambat dan semua job dikerjakan berurutan. AbstractThe production process of ST 37777 in PT Ebako Nusantara uses a schedule based on the processes performed using existing historical data from the production process that has been done. PT Ebako Nusantara is a manufacturing industry engaged in furnitur located in Terboyo, Semarang, Central Java. In the production process ST 37777, there are 11 machines and 16 jobs where each job has a different sequence of machines. The existing scheduling for ST 37777 type product with jobshop type has not been applied a determination in the timing and sequence of effective machine work so that many jobs are finished too late. For that required an effective engine scheduling so that it can meet the production time of orders in accordance with the agreed. Jobshop scheduling is needed to maximize efficiency and resource utilities on the production floor. Determination of this machine schedule aims to minimize the makespan using WINQSB Software job scheduling module. The method used is the method of Short Processing Time. The scheduling result using WINQSB software obtained makespan to 15 hours with scheduling result no job is late and all job done in sequence. Keywords: Jobshop Scheduling; Short Processing Time; Makespan Minimization

scholarly journals A novel synthetic-genetic-array–based yeast one-hybrid system for high discovery rate and short processing time

2019 ◽  
Vol 29 (8) ◽  
pp. 1343-1351
Author(s):  
Chung-Shu Yeh ◽  
Zhifeng Wang ◽  
Fang Miao ◽  
Hongyan Ma ◽  
Chung-Ting Kao ◽  
...  
Keyword(s):  
Hybrid System ◽  
Processing Time ◽  
Synthetic Genetic Array ◽  
Short Processing Time

Securities markets and protection of small investors in public shareholding companies of United Arab Emirates

2019 ◽  
Vol 11 (1) ◽  
pp. 73-80
Author(s):  
Nashat Jaradt
Keyword(s):  
United Arab Emirates ◽  
Best Practice ◽  
Stock Exchange ◽  
Securities Markets ◽  
Legal Cases ◽  
Content Type ◽  
Roles And Responsibilities ◽  
Doing Business ◽  
Small Investors ◽  
The Subject

Purpose The purpose of this paper is to review the laws in relation to the role of the securities markets in protecting small investors and examine legal cases that have recently been observed in this area. Design/methodology/approach A research-based qualitative analysis was undertaken to determine the governing authorities on the subject of international trade contracts globally. Various internet searches were conducted and information was collected to represent the subject at large and to the best and most current understanding. The information was assessed in its joined context to prepare recommendations for best practice. Findings In the United Arab Emirates (UAE), the rights of small investors in public shareholding companies are protected through many different legal stipulations that all must adhere to in order to offer stock. Through an examination of the laws of the UAE in relation to securities markets’ roles and responsibilities, a clear picture of protection is created that ensures small investors’ risks are minimized. In this regard, the UAE has implemented additional regulations in comparison to any other country as evident through the Doing Business Report (2014). Research limitations/implications The review of available documents is limited to UAE and hence cannot be generalized into a broader context. Originality/value This paper work contributes the research about the existing conditions of securities markets of protected small investor in UAE stock exchange market as serious as that of protecting the national economy.

scholarly journals Improving the Quality of City Cleanliness through Investment Paradiplomacy in Bantaeng, Indonesia

2021 ◽  
Vol 277 ◽  
pp. 02007
Author(s):  
Ahmad Harakan ◽  
Nuryanti Mustari ◽  
Abel Alfred Kinyondo
Keyword(s):  
Local Governments ◽  
Best Practice ◽  
Case Study Method ◽  
Depth Data ◽  
The Reformation ◽  
Management Policies ◽  
Effectiveness And Efficiency ◽  
Learning And Collaboration

The phenomenon of governance after the Reformation was the provision of more excellent opportunities for local governments to explore the capabilities and resources of their respective regions. Autonomy reflects the centralization policy that was previously implemented and is considered to have not been maximal in producing quality governance improvements, especially in cleanliness, which is the main problem in governance. This opportunity can be implemented by conducting learning and collaboration with other parties, both private and local governments abroad, who have a best practice profile of cleanliness governance through paradiplomacy practices. This research wants to obtain in-depth data. Data collection was carried out in three ways, namely interviews, observation, and documentation studies, through a qualitative approach with the case study method. The learning Process and cooperation in the Bantaeng Regency government impact changing people’s views and making hygiene management policies in Bantaeng. Besides, there is technology transfer to support the effectiveness and efficiency of waste management and city cleanliness in Bantaeng Regency.

scholarly journals PENINGKATAN KAPASITAS PRODUKSI MELALUI PENERAPAN THEORY OF CONSTRAINT, PENJADWALAN MESIN PARALEL DAN BOTTLENECK SCHEDULING PADA PERUSAHAAN SHEET METAL WORK

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Sonia Nur Indah Suci ◽  
Nora Azmi ◽  
Sumiharni Batubara
Keyword(s):  
Processing Time ◽  
Parallel Machines ◽  
Job Scheduling ◽  
Production Capacity ◽  
Theory Of Constraints ◽  
Job Sequencing ◽  
Short Processing Time ◽  
Current Production ◽  
Scheduling Method ◽  
Theory Of Constraint

<p>This study aims to increase the production capacity of the server rack 08U Type Double ASeries<br />Wallmounted BRI on company X. Current production did not reached the expected target of<br />117 units / week because of the bottleneck workstation. The study began by identifying the bottleneck<br />workstation using the Theory of Constraints (TOC). The result of identification process showed two<br />bottleneck work stations, that are work station Punching and Ovencoating. The production capacity<br />was improved by performing the steps as follows: 1) Add 1 machine at punching station, 2) perform<br />job scheduling on parallel machines at punching station using Short Processing Time (SPT) criteria;<br />3) perform job sequencing on bending station using Weighted Shortest Processing Time (WSPT)<br />criteria; 4 ) adds overtime at ovencoating stations, and 5) implementing bottleneck scheduling method<br />to sequence all jobs. The Results of this study showed that makespan was reduced by 12.03% and<br />production capacity increased by 41.9% so that the production target of 117% can be achieved.</p>

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