Rupture of an Idiopathic Aneurysm of the Inferior Pancreaticoduodenal Artery Leading to an Intra-Abdominal Bleeding

Riham Imam,Harbi Khalayleh,Deeb Khoury,Guy Lin,Ashraf Imam 대한외상중환자외과학회 2020 Journal of Acute Care Surgery Vol.10 No.1

Aneurysm of the pancreaticoduodenal artery is a rare finding that can be divided into true and false aneurysm. True aneurysm of the pancreaticoduodenal artery is more common and is usually due to atherosclerosis or celiac stenosis. Herein we present a rare case of a 59-year-old male patient with a spontaneous rupture of an idiopathic aneurysm of the inferior pancreaticoduodenal artery who was successfully treated with angiographic coil embolization

Biak and Wakatobi reefs are the two hottest hotspots of coral reef fish diversity and abundance in the Indonesian Archipelago

Imam Bachtiar,Edwin Jefri,Muhammad Abrar,Tri Aryono Hadi 한국수산과학회 2022 Fisheries and Aquatic Sciences Vol.25 No.11

The Indonesian Archipelago has a very complex geological history, along with equatorial warm sea temperature, resulting in diverse types of coral reefs and high diversity of coral reef fish. Many livelihoods of the coastal community are dependent on coral reef fisheries. The present study aimed to determine which region and location in the Indonesian Archipelago has the most diverse and abundant coral reef fish. The archipelago was divided into four regions: the Indian Ocean, Sunda Shelf, Wallacea, and the Pacific Ocean. Data were obtained from a national coral reef monitoring program of the Indonesian Research Center for Oceanography (RCO)-the National Board for Research and Innovation (BRIN). The reef fish data were collected using the underwater visual census method, from 321 belt transects on 24 locations (districts) across the archipelago. The results show that coral reef fish diversity of the Pacific region was the highest across the archipelago for all three trophic levels, i.e., corallivore, herbivore, and carnivore fish. The Pacific Ocean region also had the highest fish abundance for the three trophic levels. Comparison among locations revealed that the best ten locations in reef fish diversity and abundance were Sabang, Mentawai, Makassar, Selayar, Buton, Luwuk, Ternate, Raja Ampat, Biak, and Wakatobi. Wakatobi reefs showed their supremacy in carnivore fish diversity and abundance, while Biak reefs were the best in herbivore fish. The abundance of corallivore fish was also considerably high in Sabang reefs, but it is still lower than in Raja Ampat, Biak, and Wakatobi reefs. These results provide empirical evidence that the coral reefs of Wakatobi and Biak are the hottest hotspots of coral reef fish diversity and abundance in the Indonesian Archipelago.

Review study towards effect of Silica Fume on the fresh and hardened properties of concrete

Imam, Ashhad,Kumar, Vikash,Srivastava, Vikas Techno-Press 2018 Advances in concrete construction Vol.6 No.2

This paper presents a review on the use of Silica Fume (SF) as a mineral admixture in the concrete. Distinctive outcome from several researches have been demonstrated here, particularly emphasizing on the fresh and hardened properties of concrete when blended with Silica Fume (Micro-silica or Nano-silica). The results showed a substantial enhancement in the mechanical properties of concrete when replaced with SF. The review also presented a brief idea of percentage replacement of SF in case of normal and high-strength concrete. A decreasing trend in workability (slump value) has been identified when there is a increase in percentage replacement of SF. It can be concluded that the optimize percentage of replacement with SF lies in the range of 8-10% particularly for compressive strength. However the variation of blending goes up to 12-15% in case of split tensile and flexure strength of concrete. The study also demonstrates the effect of silica fume on durability parameters like water absorption, permeability, sulphate attack and chloride attack.

Investigation towards strength properties of ternary blended concrete

Imam, Ashhad,Moeeni, Shahzad Asghar,Srivastava, Vikas,Sharma, Keshav K Techno-Press 2021 Advances in concrete construction Vol.11 No.3

This study relates to a production of Quaternary Cement Concrete (QCC) prepared by using Micro Silica (MS), Marble Dust (MD) and Rice Husk Ash (RHA), followed by an investigation towards fresh and hardened properties of blended concrete. A total of 39 mixes were cast by incorporating different percentages of MS (6%, 7% and 8%), MD (5%, 10% and 15%) and RHA (5%, 10%, 15% and 20%) as partial replacement of Ordinary Portland Cement. The workability of fresh concrete was maintained in the range of 100±25 mm by adding 0.7% of Super Plasticizer in the mix. Optimum mechanical strength was observed at combination of 8% MS+5% MD+10% RHA. Marble dust replacement from 10 to 15% and Rice husk ash replacements from 15 to 20% depicted a substantial reduction in compressive strength at all ages. Durability parameter with respect to water absorption at 28 days shows an increasing trend as the percentage of blending increases.

<i>N6</i>-methyladenosine modification of hepatitis B virus RNA differentially regulates the viral life cycle

Imam, Hasan,Khan, Mohsin,Gokhale, Nandan S.,McIntyre, Alexa B. R.,Kim, Geon-Woo,Jang, Jae Young,Kim, Seong-Jun,Mason, Christopher E.,Horner, Stacy M.,Siddiqui, Aleem National Academy of Sciences 2018 Proceedings of the National Academy of Sciences Vol.115 No.35

<P>N6-methyladenosine (m(6)A) RNA methylation is the most abundant epitranscriptomic modification of eukaryotic messenger RNAs (mRNAs). Previous reports have found m(6)A on both cellular and viral transcripts and defined its role in regulating numerous biological processes, including viral infection. Here, we show that m(6)A and its associated machinery regulate the life cycle of hepatitis B virus (HBV). HBV is a DNA virus that completes its life cycle via an RNA intermediate, termed pregenomic RNA (pgRNA). Silencing of enzymes that catalyze the addition of m(6)A to RNA resulted in increased HBV protein expression, but overall reduced reverse transcription of the pgRNA. We mapped the m(6)A site in the HBV RNA and found that a conserved m(6)A consensus motif situated within the epsilon stem loop structure, is the site for m(6)A modification. The epsilon stem loop is located in the 3' terminus of all HBV mRNAs and at both the 5' and 3' termini of the pgRNA. Mutational analysis of the identified m(6)A site in the 5' epsilon stem loop of pgRNA revealed that m(6)A at this site is required for efficient reverse transcription of pgRNA, while m(6)A methylation of the 3' epsilon stem loop results in destabilization of all HBV transcripts, suggesting that m(6)A has dual regulatory function for HBV RNA. Overall, this study reveals molecular insights into how m(6)A regulates HBV gene expression and reverse transcription, leading to an increased level of understanding of the HBV life cycle.</P>

Other faunas, coral rubbles, and soft coral covers are important predictors of coral reef fish diversity, abundance, and biomass

Imam Bachtiar,Tri Aryono Hadi,Karnan Karnan,Naila Taslimah Bachtiar 한국수산과학회 2023 Fisheries and Aquatic Sciences Vol.26 No.4

Coral reef fisheries are prominent for the archipelagic countries’ food sufficiency and security. Studies showed that fish abundance and biomass are affected by biophysical variables. The present study determines which biophysical variables are important predictors of fish diversity, abundance, and biomass. The study used available monitoring data from the Indonesian Research Center for Oceanography, the National Board for Research and Innovation. Data were collected from 245 transects in 19 locations distributed across the Indonesian Archipelago, including the eastern Indian Ocean, Sunda Shelf (Karimata Sea), Wallacea (Flores and Banda Seas), and the western Pacific Ocean. Principal component analysis and multiple regression model were administered to 13 biophysical metrics against 11 variables of coral reef fishes, i.e., diversity, abundance, and biomass of coral reef fishes at three trophic levels. The results showed for the first time that the covers of other fauna, coral rubbles, and soft corals were the three most important predictor variables for nearly all coral reef fish variables. Other fauna cover was the important predictor for all 11 coral reef fish variables. Coral rubble cover was the predictor for ten variables, but carnivore fish abundance. Soft coral cover was a good predictor for corallivore, carnivore, and targeted fishes. Despite important predictors for corallivore and carnivore fish variables, hard coral cover was not the critical predictor for herbivore fish variables. The other important predictor variables with a consistent pattern were dead coral covered with algae and rocks. Dead coral covered with algae was an important predictor for herbivore fishes, while the rock was good for only carnivore fishes.

Practical Resilience Index for Coral Reef Assessment

Imam Bachtiar,Suharsono,Ario Damar,Neviaty P. Zamani 한국해양과학기술원 2019 Ocean science journal Vol.54 No.1

Assessing coral reef resilience is an increasingly important component of coral reef management. Existing coral reef resilience assessments are not practical, especially for developing countries. South-east Asian countries have been using line-intercept-transect (LIT) in coral reef monitoring for a long time. The present study proposes an index for assessing coral reef resilience based on data collected from the LIT method. The resilience index formula was modified from an existing resilience index for soil communities developed by Orwin and Wardle. We used an ideal resilient coral reef community as a reference point for the index. The ideal coral reef was defined from data collected from 1992 to 2009. Six variables were statistically selected for the resilience indicators: coral functional group (CFG), coral habitat quality (CHQ), sand-silt cover (SSC), coral cover (COC), coral small-size number (CSN), and algae-other-fauna (AOF) cover. Maximum values of five variables were determined as the best state, while the maximum value of CSN was determined from 1240 data-sets of Indonesian reefs. The resilience index performed well in relation to changes in COC, AOF, and SSC variables. Managers can use this tool to compare coral reef resilience levels among locations and times. This index would be applicable for global coral reef resilience assessment.

Occupational Safety among Working Children in the Export Sector of Bangladesh

Imam M. Alam,Amin Shahina,Rives Janet M 한국국제경제학회 2013 International Economic Journal Vol.27 No.4

Consumers in the United States are reluctant to purchase imported products made using child labor, because working is considered harmful to children. This research uses 2002–2003 survey data to investigate whether illness or injury related to occupational hazards depends on whether a child works in the export sector in Bangladesh. Our results indicate that working in the export sector does not significantly contribute to illness or injury. We further analyze whether working in the export sector causes severe illness or injury, but we find no significant relationship between children's work in the export sector and the incidence of severe illness or injury. Our findings underscore the importance workplace safety compliance in the export sector

Towards Resource-Generative Skyscrapers

Imam, Mohamed,Kolarevic, Branko Council on Tall Building and Urban Habitat Korea 2018 International journal of high-rise buildings Vol.7 No.2

Rapid urbanization, resource depletion, and limited land are further increasing the need for skyscrapers in city centers; therefore, it is imperative to enhance tall building performance efficiency and energy-generative capability. Potential performance improvements can be explored using parametric multi-objective optimization, aided by evaluation tools, such as computational fluid dynamics and energy analysis software, to visualize and explore skyscrapers' multi-resource, multi-system generative potential. An optimization-centered, software-based design platform can potentially enable the simultaneous exploration of multiple strategies for the decreased consumption and large-scale production of multiple resources. Resource Generative Skyscrapers (RGS) are proposed as a possible solution to further explore and optimize the generative potentials of skyscrapers. RGS can be optimized with waste-energy-harvesting capabilities by capitalizing on passive features of integrated renewable systems. This paper describes various resource-generation technologies suitable for a synergetic integration within the RGS typology, and the software tools that can facilitate exploration of their optimal use.

Run-out Distribution of Pasir Panjang Landslides Followed by the Debris Flow, Central Java, Indonesia

( Imam Achmad Sadisun ),( Indra Andra Dinata ),( Rendy Dwi Kartiko ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2

Indonesia is one of the world’s most natural disaster-prone country from landslides. These landslides mostly occur at areas having steep to very steep slopes, intensive weathering processes and high to very high rainfall intensity. Generally, debris flows referred to mudflows or lahars. These types of landslide are common type of fast-moving landslide. In this regard, the occurrence of several landslides followed by the debris flow often make a lot of casualties and very terrible destructions in some areas of Java Island, Indonesia. For example, Jemblung Landslide on December 12, 2014 has 139 causalities. Accordingly, some debris flow modelling have been conducted to determine run-out distribution characteristics of debris materials at the depositional areas. The concept of debris flow modeling is based on the equations of momentum, continuation, riverbed deformation and erosion/deposition and riverbed shearing stress. From the modeling of Pasir Panjang landslide case, the viscosity value of 0.3 indicated the best fit simulation result. The flowing material of this landslide case has very long distance, 2.3 km in approximate. It occurs because 275,295 m3 volume material which flowing is supported with 25.58 km/hour of maximum flow rate and relatively straight flow track in 35°-45° of slope angle.