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Ilham Jioui,Karim Daˆnoun,Abderrahim Solhy,Mustapha Jouiad,Mohamed Zahouily,Bilal Essaid,Christophe Len,Aziz Fihri 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
In the present study, we investigated the synthesis of fluorapatite using a pseudo sol–gel processand the chemical modification of this new catalyst support via impregnation of sodium nitratefollowed by calcination at 550 8C in order to enhance its catalytic performance. This approach wasused to obtain a bi-functional catalyst for Claisen–Schmidt condensation. Indeed, this heterogeneouscatalyst exhibited excellent catalytic activity and high selectivity for the synthesis of chalconesfrom direct aromatic aldehydes with substituted ketones at room temperature. The operationalsimplicity, excellent yields of the products and the recyclability of the catalyst are the mainadvantages of this method.
Corrections for effects of biaxial stresses in annealed glass
Ilham Nurhuda,Nelson T.K. Lam,Emad F. Gad,Ignatius Calderone 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.39 No.3
Experimental tests have shown that glass exhibits very different strengths when tested under biaxial and uniaxial conditions. This paper presents a study on the effects of biaxial stresses on the notional ultimate strength of glass. The study involved applying the theory of elasticity and finite element analysis of the Griffith flaw in the micro scale. The strain intensity at the tip of the critical flaw is used as the main criterion for defining the limit state of fracture in glass. A simple and robust relationship between the maximum principal stress and the uniaxial stress to cause failure of the same glass specimen has been developed. The relationship has been used for evaluating the strength values of both new and old annealed glass panels. The characteristic strength values determined in accordance with the test results based on 5% of exceedance are compared with provisions in the ASTM standard.
Corrections for effects of biaxial stresses in annealed glass
Nurhuda, Ilham,Lam, Nelson T.K.,Gad, Emad F.,Calderone, Ignatius Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.39 No.3
Experimental tests have shown that glass exhibits very different strengths when tested under biaxial and uniaxial conditions. This paper presents a study on the effects of biaxial stresses on the notional ultimate strength of glass. The study involved applying the theory of elasticity and finite element analysis of the Griffith flaw in the micro scale. The strain intensity at the tip of the critical flaw is used as the main criterion for defining the limit state of fracture in glass. A simple and robust relationship between the maximum principal stress and the uniaxial stress to cause failure of the same glass specimen has been developed. The relationship has been used for evaluating the strength values of both new and old annealed glass panels. The characteristic strength values determined in accordance with the test results based on 5% of exceedance are compared with provisions in the ASTM standard.
( Muhammad Ilham Aldika Akbar ),( Khanisyah Erza Gumilar ),( Rino Andriya ),( Manggala Pasca Wardhana ),( Pungky Mulawardhana ),( Jimmy Yanuar Anas ),( Ernawati ),( Muhammad Ardian Cahya Laksana ),( G 대한산부인과학회 2022 Obstetrics & Gynecology Science Vol.65 No.1
Objectives Data on the clinical manifestations and pregnancy outcomes of pregnant women with COVID-19 are limited, particularly in developing countries. The aim of this study was to analyze the clinical manifestations and pregnancy outcomes in COVID-19 maternal cases in a large referral hospital in Indonesia. Methods This study used a prospective cohort design and included all pregnant women with suspected COVID-19. Subjects were divided into COVID-19 and non-COVID-19 groups based on the results of real-time polymerase chain reaction (RT-PCR) for severe acute respiratory syndrome coronavirus 2. Clinical characteristics, laboratory results, and pregnancy outcomes were compared between the two groups. Results Of the 141 suspected maternal cases, 62 cases were COVID-19-confirmed (43.9%), while 79 suspected cases were negative (56.1%). The clinical manifestations and laboratory findings between the two groups were not significantly different (P>0.05). However, the maternal mortality directly caused by COVID-19 was significantly higher than that in the non-COVID-19 group (8.3% vs. 1.3%; P=0.044; odd ratio, 6.91; 95% confidence interval, 0.79-60.81). Conclusion The clinical manifestations and laboratory results of suspected pregnant women with positive and negative RT-PCR COVID-19 results were similar. However, within the Indonesian setting, COVID-19 significantly increases the risk of maternal death through both direct and indirect factors.
Nur Ilham Aminullah Abdulqawi,Mohd Salman Abu Mansor 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.3
Reverse engineering faces challenges when it comes to data extraction using indirect contact method. There are 3D scanners capable of extracting data from distance more than a few meters away without contacting the objects but yet limited to same space range only. Although synchronizing the 3D scanners from another place can enable long distance data extraction, synchronizing devices over long distance can lead to other issues such as lagging. Moreover, the uses of 3D scanners usually involve quite long consumption time regardless of same space range or long distance range application. To overcome these issues, this study introduces a 3D surface reconstruction system by including a webcam imaging technique to produce a 3D point cloud, which is the same as that produced by a 3D scanner, and thus, eliminate the use of a 3D scanner. Through webcam imaging, image data can be transferred over the Internet and can be shared instantly even in different locations. Hence, webcam imaging is an alternative to using a 3D scanner. This system will continuously generate 3D free-form surfaces to resemble the surface profile of physical objects. Acquiring data until the surface fitting process will take less time compared with using a combination of 3D scanner and CAD software. In addition, results produced from the webcam imaging technique are compared with conventional results from a 3D scanner.
Ismail Mohd-Ilham,Evelyn Li Min Tai,Hussain Suhaimi,Ismail Shatriah 대한안과학회 2021 Korean Journal of Ophthalmology Vol.35 No.4
Purpose: There are limited data from Asian countries regarding retinal thickness in children with type 1 diabetes mellitus (T1DM). This study aimed to compare the macular and retinal nerve fiber layer (RNFL) parameters between diabetic children without retinopathy and non-diabetic healthy children. We also evaluated the factors associated with RNFL thickness in children with T1DM. Methods: A comparative cross-sectional study was conducted among children with T1DM and healthy children aged 7 to 17 years old in Hospital Universiti Sains Malaysia from 2017 to 2019. Children with retinal disease or glaucoma were excluded. Macular and RNFL thicknesses were measured using spectral-domain optical coherence tomography. Demographic information, duration of diabetes, blood pressure, body mass index, visual acuity, and retinal examination findings were documented. Glycosylated hemoglobin levels, renal function, and blood lipid levels were also collected. Results: Forty-one children with T1DM and 80 age- and sex-matched children were enrolled. Both sexes were affected. Mean duration of diabetes mellitus was 3.66 years. The mean glycated hemoglobin levels in the T1DM group was 9.99%. The mean macular and RNFL thicknesses in children with T1DM were 277.56 (15.82) µm and 98.85 (12.05) µm, respectively. Children with T1DM had a significantly thinner average macula, superior outer macula, nasal outer macula, mean RNFL, and inferior RNFL thickness compared to controls (p < 0.05). There was a significant association between nephropathy and the mean RNFL thickness. Conclusions: Children with T1DM had significantly decreased mean macular and RNFL thicknesses. Nephropathy is associated with an increased RNFL thickness.
Dominant Enterobacteriaceae in tempeh were primarily originated from soybean
Horizon M. Ilham,Michael Wijaya,Antonius Suwanto,Iman Rusmana 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.6
During tempeh production, boiling was consideredas heat treatment that could significantly reduce oreliminate bacterial population in soybean before fungalinoculation. The objective of this study was to enumerateand trace Enterobacteriaceae communities in pre-boilingsoybean, post-boiling soybean, and fresh tempeh designatedas RTI and EMP. Standard plate count and qRT-PCRwere employed to determine the culturable and non-culturablebacteria, while Enterobacterial Repetitive IntragenicConsensus PCR was conducted to determine theintraspecies genomic variations. Fresh tempeh from bothRTI and EMP contained approximately 107 and 108 CFU/gof Enterobacteriaceae respectively. The number of bacteriain pre-boiling soybean were 10,000 times lower than infresh tempeh. Our study showed that most Enterobacteriaceaewere severely injured or quiescent during boilingprocess and quickly recovered up to 109 CFU/g in freshtempeh. Some Klebsiella isolates found in tempeh weregenetically identical to isolates in soybean, but differentfrom those of medical isolates. This study suggested thatsoybean could be the main origin of Klebsiella in freshtempeh.
PAKAWARU, Muhammad Ilham,MAYAPADA, Arung Gihna,AFDALIA, Nadhira,TANRA, Andi Ainil Mufidah,AFDHAL, Muhammad Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.2
The relationship between corporate social responsibility (CSR) and earnings management is still a debate. Several previous studies showed that CSR is a determinant of earnings management. Meanwhile, others revealed the reverse. Therefore, this study aims to investigate the effect of CSR disclosure on earnings management and the effect of earnings management on CSR disclosure. This study was conducted with mining companies listed on the Indonesia Stock Exchange (IDX) in the 2016-2019 period. The research data was analyzed using multiple linear regression analysis. The data is obtained from financial statements, annual reports, and sustainability reports. The results reveal that there is a positive relationship between CSR disclosure and earnings management. This study also shows that the relationship model of CSR disclosure and earnings management is recursive. This finding implies that CSR disclosure is a tool used by management to cover up unethical actions from stakeholders. These results verify the agency theory and opportunist hypothesis regarding the relationship between CSR and earnings management. The novelty of this study lies in highlighting the recursive model of the relationship between CSR and earnings management.