Prediction Modeling of 28-Day Concrete Compressive Strength using Artificial Neutral Network

Compressive strength of concrete at the age of 28 days is an important parameter for the design of concrete structures and waiting for that length of time to obtain the value can be tasky. This study developed an alternative approach using Artificial Neutral Network (ANN) to estimate or predict the compressive strength of concrete at 28th day from early age results. In the study concrete cubes of mix ratio 1:2:4 were cast with different water-cement ratios (0.4, 0.5, 0.6 and 0.65) and their seventh (7th) and twenty-eighth (28th) day strength were measured in the laboratory. In all, 400 cubes of 150 x 150 x 150mm of 200 sets were subjected to compressive strength test using Avery Denison Universal Testing Machine of 2000 kN load capacity at a constant load application of 15kN/s. ANN model was then developed using the time series tool of ANN in MATLAB 7.12.0 (R2011a) applying back propagation algorithm. Out of the 200 sets of results, 110 sets (55%) were used for the training of the network while 30 sets (15%) were used to validate and 60 sets (30%) to test the network. The result of the crushing test shows that the higher the compressive strength at seventh (7th) day the higher it will be at twenty-eighth (28th) day. The result of the ANN model shows a good correlation between the seventh (7th) day compressive strength and the twenty-eighth (28th) day compressive strength with training and validation correlation coefficients of 0.99751 and 0.99736 respectively. It was also found that the ANN model is quite efficient in determining the twenty-eighth (28th) day compressive strength of concreteas the predicted strength values match very well with those obtained experimentally with a correlation coefficient of 0.99675

Analisa Kerusakan Dan Perbaikan Power Train Pada Unit Excavator Kobelco SK200-5

Power train is a drive mechanism that works together to transmit power from the engine to the final drive, how the power train works when the engine rotates drives the main pump to circulate pressurized oil from the tank to the control valve and is passed on to the travel motor to drive the final drive. A visual inspection of the components is carried out to ensure that the power train components are damaged which causes the unit to stutter, along with several visual inspections of the power train components including checking the Control Valve, Idler, and Motor Travel. Based on the results of checking the power train has damage to the worn sprocket teeth. This damage is caused by soil or mud that sticks and hardens resulting in erosion of the components which makes the components wear out, the service life has exceeded the limit. Repairs to this sprocket component require replacing it with a new part because the Kobelco Sk200-5 excavator uses a solid type sprocket

Evaluation of Antibacterial Potency of Endophytic Fungi Isolated from Mentha piperita

The Mentha piperita is an aromatic perennial herb, a member of the family Lamiaceae (Labiatae) that produces creeping stolons, growing in the range of 45 to 80 cm tall. Fungal endophytes reside in the healthy plant tissues to produce several metabolic products such as plants growth hormones, anti-phagocytes to biological feeding, medicinal ingredients, and many products of biological activities. Hence, they are regarded as a reservoir of active metabolites for the development of novel drugs. Although, many endophytic fungi have been reported from different plants, reports on fungal endophytes from M. piperita are very limited. In this study, fungal endophytes from the leaf and stem of M. piperita were successfully evaluated for their potential antibacterial properties. Healthy leaves of the peppermint were prepared and cultured on potato dextrose agar (PDA) plates for 5 to 7 days at 28 oC until fungal colonies appeared. Fifteen (15) fungal isolates were identified based on cultural and morphological characteristics and had six (6) rapid growing species, namely Aspergillus fumigatus, Rhizopus arrhizus, Aspergillus flavus, Fusarium oxysporum, Aspergillus niger, Alternaria alternate which were selected and evaluated their crude metabolites against c using agar well diffusion method. The susceptibility study showed a remarkable in vitro antibacterial activity of the fungal crude metabolites against all the test bacteria which increased with an increased incubation time of 7, 14 and 21 days incubation. However, the fungi displayed maximal zone of growth inhibition after 21 days of incubation. In conclusion, fungal endophytes were isolated from M. piperita and evaluated in vitro antibacterial activity of their crude metabolites against the test bacterial isolates

Pondok Pesantren Kreatif Semi Modern di Kota Malang

The creative economy has recently grown rapidly in Indonesia with a growth of around 5.70% annually. Even during the Covid-19 pandemic, the creative economy became a catalyst for Indonesia's economic growth amidst a slowdown in global economic growth. Long before the pandemic, the Government of Indonesia formed the Creative Economy Agency by the President through Perpres No. 6 of 2015 which is the first step. The government launched a creative economy development program and increased innovation and technology as an effort to increase inclusive and sustainable economic growth (Perpres No. 2 of 2015). In the National Creative Economy Development Master Plan (REINDEKREAF/ Rencana Induk Pengembangan Ekonomi Kreatif Nasional) Perpres No. 142 of 2018 there are several parties that can play a role in the development of the creative economy, one of which is an educational institution. The Islamic educational institution that is quite prominent in Indonesia is the Islamic Boarding School. While the reason for choosing Malang City as the planning location is because Malang City occupies the second position (after Surabaya) from the distribution of creative economy actors in East Java, support from the Mayor in the form of Creative Center policies and facilities, and is one of the cities that is familiar with the Islamic education system (Islamic Boarding school)

A Preliminary Survey of Gastrointestinal Helminths of Murids (Rodentia: Muridae) at Five Selected Localities in Western Sarawak

Field survey of gastrointestinal helminths on rodents from family Muridae were conducted at five localities in Western Sarawak from June 2013 until April 2014. A total of 31 host individuals comprising six species of murids were examined for gastrointestinal helminths using opportunistic necropsy. The hosts examined were Leopoldamys sabanus, Maxomys rajah, M. surifer, M. whiteheadi, Niviventer cremoriventer and Sundamys muelleri. Of these host species, 186 individuals consisting of two taxonomic groups of helminths were recovered, namely Nematoda and Cestoda. This study contributes to the growing literature on the infestation of endoparasites in rodents especially in Sarawak

PRARANCANGAN PABRIK ETILEN OKSIDA DARI ETILEN DENGAN PROSES OKSIDASI KAPASITAS 150.000 TON/TAHUN

Pre-draft Factory ethylene oxide oxidation process with capacity of 150,000 tons / year in operation for 330 days per year. Factory will be established in the industrial area Cilegon, Banten with 9.705 m2 land area and 124 employees. The raw material ethylene form PT. Chandra Asri Petrochemical, Cilegon and Oxygen from PT. Air Liquide Indonesia, Cilegon. Making the reaction of ethylene oxide oxidation process using fixed bed multitube reactor with silver catalysts. On phase gases, irreversible, with exothermic temperature from 220 to 252.6°C and pressure 15 atm. The resulting product side carbon dioxide and air. Raw materials production of ethylene oxide needs ethylene amounted 117.990 tons / year and oxygen amounted to 74.914 tons / year. Process supporting utilities include the air supply unit amounted to 108.3 m3 / day, steam unit amounted to 536.7 m3 / day be produced from boiler with diesel fuel used to 117.9 ft3 / hour, unit power needs power of 1263.68 kWh be produced from PLN, and waste treatment unit. The result of the economic ethylene oxide using fixed capital Rp. 314 644 880 961. Advantages per year before tax Rp 2,478,140,104,505, profit per year after tax Rp 1,982,512,083,604, Return of Investment (ROI) after tax 49.9% and 39.1%, Pay Out Time (POT) before tax 1.72 years and after tax of 2.08. Economic analysis with Break Even Point and Shut Down Point 53% and 42%. So plant can be established because Pay Out Time and after 2.08 years

Resuming elective hip and knee arthroplasty after the first phase of the SARS-CoV-2 pandemic: the European Hip Society and European Knee Associates recommendations

The Covid-19 pandemic has disrupted health care systems all over the world. Elective surgical procedures have been postponed and/or cancelled. Consensus is, therefore, required related to the factors that need to be in place before elective surgery, including hip and knee replacement surgery, which is restarted. Entirely new pathways and protocols need to be worked out. Methods A panel of experts from the European Hip Society and European Knee Association have agreed to a consensus statement on how to reintroduce elective arthroplasty surgery safely. The recommendations are based on the best available evidence and have been validated in a separate survey. Results The guidelines are based on five themes: modification and/or reorganisation of hospital wards. Restrictions on orthopaedic wards and in operation suite(s). Additional disinfection of the environment. The role of ultra-clean operation theatres. Personal protective equipment enhancement. Conclusion Apart from the following national and local guidance, protocols need to be put in place in the patient pathway for primary arthroplasty to allow for a safe retur

Recommendations for resuming elective hip and knee arthroplasty in the setting of the SARS‑CoV‑2 pandemic: the European Hip Society and European Knee Associates Survey of Members

The COVID-19 pandemic has disrupted the health care system around the entire globe. A consensus is needed about resuming total hip and knee procedures. The European Hip Society (EHS) and the European Knee Association (EKA) formed a panel of experts that have produced a consensus statement on how the safe re-introduction of elective hip and knee arthroplasty should be undertaken. Methods A prospective online survey was done among members of EHS and EKA. The survey consisted of 27 questions. It includes basic information on demographics and details the participant’s agreement with each recommendation. The participant could choose among three options (agree, disagree, abstain). Recommendations focussed on pre-operative, perioperative, and post-operative handling of patients and precautions. Results A total of 681 arthroplasty surgeons participated in the survey, with 479 fully completing the survey. The participants were from 44 countries and 6 continents. Apart from adhering to National and Local Guidelines, the recommendations concerned how to make elective arthroplasty safe for patients and staf. Conclusion The survey has shown good-to-excellent agreement of the participants with regards to the statements made in the recommendations for the safe return to elective arthroplasty following the frst wave of the COVID-19 pandemi

Genetic diversity and population structure of a mini-core subset from the world cowpea (Vigna unguiculata (L.) Walp.) germplasm collection

Open Access Journal; Published online: 30 Oct 2018The International Institute of Tropical Agriculture maintains the world’s largest collection of cowpea germplasm of over 15,000 accessions. A sub-set of 298 lines from the loosely composed mini core collection of 370 landraces were genotyped based on genotyping by sequencing (GBS). Ward’s minimum variance hierarchical cluster analysis, model-based ancestry analysis and discriminant analysis of principal component (DAPC) were carried out on this sub-set. Three clusters were identified by the different clustering methods. Principal component analysis further supported the three clusters especially when accessions are scattered along the axes of the first two principal components. The first two principal components explained a total of 22.30% of the variation. Cluster one comprises 115 accessions from the largest number of countries and has the highest gene diversity, heterozygosity and polymorphic information content (PIC) values. Cluster two is made up of 102 accessions, 90 percent of which are from West and Central Africa. Analysis of molecular variance shows that the most variation is among accessions and lowest among clusters. No cluster is made exclusively of accessions from a single country. Based on SNP markers, the sub set of cowpea mini core germplasm collection used in this study encompasses the diversity in the crop

Bird Survey At Sungai Dusun Wildlife Reserve, Perak, Malaysia

A survey on birds was conducted at Sungai Dusun Wildlife Reserve on the 26th until 31th of October 2009. Ten mist nets were deployed throughout the four days sampling period. A total of 27 individuals representing 16 species from 10 families of birds were recorded. The most common species recorded is the Arachnothera longirostra that was represented by six individuals