scholarly journals Capability of Cellulolytic Degradation (BSD) Bacteria (CDB) to Remodel Organic Waste into Compost

2019 ◽  
Vol 6 (3) ◽  
pp. 490-499
Author(s):  
Eri Samah Samah ◽  
Misdawati
Keyword(s):  
Organic Waste ◽  
Design Method ◽  
Acid Soil ◽  
Acid Soils ◽  
Cellulolytic Bacteria ◽  
Clear Zone ◽  
Research Activity ◽  
Factorial Method ◽  
The City ◽  
Better Than

Capability of Cellulolytic Degradation (BSD) Bacteria (CDB) to Remodel Organic Waste intoCompost The purpose of this study was to obtain superior cellulolytic bacteria from acid soils as astarter for the degradation of organic waste in the city of Padang by testing the activity of cellulaseenzymes. The method used in the factorial method is the Cellulolytic Degradation Bacteria factorwith the Organic Waste of Padang City. This research was conducted at the Plant PhysiologyLaboratory and the Soil Science Laboratory, Faculty of Agriculture. The research activity was begunby isolating the bacteria from acid soil, followed by testing the enzyme activity of the specific mediumof carboxyl methylcellulose (CMC) medium. Factorial Complete Random Design Method. The firstfactor was selected 3 isolates of cellulolytic bacteria, the second-factor main market organic wasteat of Padang and was two treatments namely unstable sterile (A) and nonsterile (B). The researchresults obtained 6 isolates of cellulolytic bacteria with a clear zone index ≥ 2, namely Km25,Sr. 75, Jm, U-6, G-8, and Km 13, respectively 3.12; 3.04; 3.0; 2.04; 2.00, and 2.04, and used forcomposting organic waste 3 isolates of clear zone bacteria ≥ 3.0 isolates of KM25, Sr75, and JMrespectively 3.12; 3.04; 3.01. Non-sterile organic waste is better than sterile due to the non-sterile,there is the help of battery change from the trash. Conclusion The best composting material is notsterilized, and better bacteria decompose the waste combined with the three isolates KM25, SR75,and JM.

scholarly journals Isolation of Cellulose Degradation Bacteria (CDB) from acid soil as a potential candidate of organic waste degradation

2019 ◽  
Vol 1 (2) ◽  
pp. 26-35
Author(s):  
Eri Samah
Keyword(s):  
Bovine Serum Albumin ◽  
Protein Content ◽  
Growth Curve ◽  
Organic Waste ◽  
Cellulose Degradation ◽  
Acid Soil ◽  
Maximum Activity ◽  
Potential Candidate ◽  
Clear Zone ◽  
Waste Degradation

Background: The study aimed to obtain CDB with high degraded activities, determined growth curve, protein content, and cellulase maximum activity (exoglucanase and endoglucanase). Method:  The cellulose activity calculated according to Miller (1959), protein content was measured by Bradford method with bovine serum albumin (BSA) as a standardize protein. Result: Six isolates of CDB were found as potential degradation of organic waste (Km25, Sr75, Jm, U6, G8, and Km13). Growth curve, protein level, and protein maximum activity occurred on day-3. The largest diameter of clear zone of six isolates was Km25, Sr75, Jm, U6, G8, and Km13 (3.32, 3.31, 2.41, 2.36, 2.19, and 2.04 mm, respectively). Endoglucanase and exoglucanase maximum activity were 0.011-0.402 IU/mL and 0.0028-0.155 IU/mL, respectively. Conclusion: Six isolates showed high activities of cellulase with diameter of clear zone ≥ 2 cm (Km25, Sr75, Jm, U6, G8, and Km13). Growth maximum curve was on day-3. Highest endo- and exoglucanase activities were on day-3 (0.402 IU/mL and 0.155 IU/mL, respectively) in Jm isolate. Keywords: Identification, degradation, clear zones, cellulase.

DEVELOPING HYBRID MEDIA INSTALLATION GAME IN TAMAN GAJAH TUNGGAL

2020 ◽  
Vol 13 (1) ◽  
pp. 16-23
Author(s):  
Agatha Maisie Tjandra ◽  
Lalitya Talitha Pinasthika ◽  
Rangga Winantyo
Keyword(s):  
Public Space ◽  
Social Marketing ◽  
Future Development ◽  
Design Method ◽  
Public Spaces ◽  
Digital Game ◽  
Interactive Installation ◽  
City Parks ◽  
The City ◽  
Media Installation

In the recent five years, City parks have been developing rapidly in urban cities in Indonesia. Built in 2007, Taman Gajah Tunggal is one of the city parks located in Tangerang. This park is situated at The Center of Tangerang City on the edge of Cisadane River. Like many public spaces in Indonesia, this park has littering issues by visitors’ lack of care. This re- search is offered to develop social marketing by using a digital game for gaining awareness of Taman Gajah Tunggal’s visitors age 17-30 years old about littering issues. This paper focused on developing the prototyping process in iteration design method by using a digital game to suggest possibilities design for future development interactive installation design in public space which can bring a new experience.

scholarly journals A balanced-to-balanced directional coupler based on branch-slotline coupled structure

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 427-433
Author(s):  
Yaxin Liu ◽  
Feng Wei ◽  
Xiaowei Shi ◽  
Cao Zeng
Keyword(s):  
Directional Coupler ◽  
Return Loss ◽  
Design Method ◽  
Differential Mode ◽  
Arbitrary Power ◽  
Measurement Results ◽  
Transition Structures ◽  
Coupled Structures ◽  
Better Than ◽  
Good Agreement

AbstractIn this paper, a balanced-to-balanced (BTB) branch-slotline directional coupler (DC) is firstly presented, which can realize an arbitrary power division ratios (PDRs). The coupler is composed by microstrip-to-slotline (MS) transition structures and branch-slotline coupled structures. The single-ended to balanced-ended conversion is simplified and easy to implemented by the MS transition structures, which intrinsically leads to the differential-mode (DM) transmission and common-mode (CM) suppression. Moreover, the different PDRs which are controlled by the widths of branch-slotlines can be achieved. In order to verify the feasibility of the proposed design method, two prototype circuits of the proposed coupler with different PDRs are fabricated and measured. The return loss and the isolation of two designs are all better than 10 dB. Moreover, the CM suppressions are greater than 35 dB. A good agreement between the simulation and measurement results is observed.

Research and application of new media urban landscape design method based on 5G virtual reality

2021 ◽  
pp. 1-9
Author(s):  
Guangchao Zhang ◽  
Xinyue Kou
Keyword(s):  
Virtual Reality ◽  
New Media ◽  
Urban Landscape ◽  
Design Method ◽  
Smart Cities ◽  
Rapid Development ◽  
Environmental Design ◽  
Landscape Design ◽  
Living Environment ◽  
The City

In recent years, with the rapid development of VR technology, its application range gradually involves the field of urban landscape design. VR technology can simulate complex environments, breaking through the limitations of traditional environmental design on large amounts of information processing and rendering of renderings. It can display complex and abstract urban environmental design through visualization. With the support of high-speed information transmission in the 5G era, VR technology can simulate the overall urban landscape design by generating VR panoramas, and it can also bring the experiencer into an immersive and interactive virtual reality world through VR video Experience. Based on this, this article uses the 5G virtual reality method in the new media urban landscape design to conduct research, aiming to provide an urban landscape design method with strong authenticity, good user experience and vividness. This paper studies the urban landscape design method in the new media environment; in addition, how to realize the VR panorama in the 5G environment, and also explores the image design of each node in the city in detail; and uses the park design in the city As an example, the realization process of the entire virtual reality is described in detail. The research in this article shows that the new media urban landscape design method based on 5G virtual reality, specifically to the design of urban roads, water divisions, street landscapes, and people’s living environment, makes the realization of smart cities possible.

AN ASSESSMENT OF THE SOIL ACIDITY PROBLEM IN ALBERTA AND NORTHEASTERN BRITISH COLUMBIA

1977 ◽  
Vol 57 (2) ◽  
pp. 157-164 ◽  
Author(s):  
D. C. PENNEY ◽  
M. NYBORG ◽  
P. B. HOYT ◽  
W. A. RICE ◽  
B. SIEMENS ◽  
...  
Keyword(s):  
British Columbia ◽  
Soil Ph ◽  
Soil Acidity ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Acid Soils ◽  
Red Clover ◽  
Hordeum Vulgare L ◽  
Crop Species

The amount of cultivated acid soil in Alberta and northeastern British Columbia was estimated from pH values of farm samples analyzed by the Alberta Soil Testing Laboratory, and the effect of soil acidity on crops was assessed from field experiments on 28 typical acid soils. The field experiments consisted of two cultivars of barley (Hordeum vulgare L.) and one cultivar each of rapeseed (Brassica campestris L.), red clover (Trifolium pratense L.) and alfalfa (Medicago sativa L.) grown with and without lime for 2 yr. There are about 30,000 ha of soils with a pH of 5.0 or less where soil acidity seriously restricts yields of all four crop species. There are approximately 300,000 ha with a soil pH of 5.1–5.5 where liming will on the average increase yields of alfalfa by 100%, yields of barley by 10–15%, and yields of rapeseed and red clover by 5–10%. There are a further 1,600,000 ha where soil pH ranges from 5.6 to 6.0 and liming will increase yields of alfalfa by approximately 50% and yields of barley, rapeseed and red clover by at least 4–5%.

A Mathematical Principle and Application on Design of Planar Six-Bar Mechanism with unto Three-Ordered Intermission at Limit Position(s)

2010 ◽  
Vol 37-38 ◽  
pp. 9-13
Author(s):  
Hong Xin Wang ◽  
Ning Dai
Keyword(s):  
Design Method ◽  
Optimization Method ◽  
Basic Function ◽  
Mathematical Principle ◽  
Transmission Characteristics ◽  
Basic Functions ◽  
Combined Mechanism ◽  
Limit Position ◽  
Derivatives Of ◽  
Better Than

A non-iterative design method about high order intermittent mechanisms is presented. The mathematical principle is that a compound function produced by two basic functions, and then one to three order derivatives of the compound function are all zeroes when one order derivative of each basic function is zero at the same moment. The design method is that a combined mechanism is constructed by six bars; the displacement functions of the front four-bar and back four-bar mechanisms are separately built, let one order derivatives of two displacement functions separately be zero at the same moment, and then get geometrical relationships and solution on the intermittent mechanism. A design example shows that this method is simpler and transmission characteristics are better than optimization method.

scholarly journals Coapplication of Chicken Litter Biochar and Urea Only to Improve Nutrients Use Efficiency and Yield ofOryza sativaL. Cultivation on a Tropical Acid Soil

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Ali Maru ◽  
Osumanu Ahmed Haruna ◽  
Walter Charles Primus
Keyword(s):  
Acid Soil ◽  
Nutrient Use Efficiency ◽  
Chemical Properties ◽  
Acid Soils ◽  
Field Trials ◽  
Soil Chemical Properties ◽  
Nutrient Use ◽  
Chicken Litter ◽  
Rice Yields ◽  
Use Efficiency

The excessive use of nitrogen (N) fertilizers in sustaining high rice yields due to N dynamics in tropical acid soils not only is economically unsustainable but also causes environmental pollution. The objective of this study was to coapply biochar and urea to improve soil chemical properties and productivity of rice. Biochar (5 t ha−1) and different rates of urea (100%, 75%, 50%, 25%, and 0% of recommended N application) were evaluated in both pot and field trials. Selected soil chemical properties, rice plants growth variables, nutrient use efficiency, and yield were determined using standard procedures. Coapplication of biochar with 100% and 75% urea recommendation rates significantly increased nutrients availability (especially P and K) and their use efficiency in both pot and field trials. These treatments also significantly increased rice growth variables and grain yield. Coapplication of biochar and urea application at 75% of the recommended rate can be used to improve soil chemical properties and productivity and reduce urea use by 25%.

Modified Posicast Control Design Method Based on the Parameters of a Fractional Order System

2021 ◽  
Vol 143 (4) ◽  
Author(s):  
Erhan Yumuk ◽  
Müjde Güzelkaya ◽  
İbrahim Eksin
Keyword(s):  
Real Time ◽  
Fractional Order ◽  
Control Method ◽  
Design Method ◽  
Order System ◽  
Half Cycle ◽  
Empirical Formulas ◽  
Real Time System ◽  
Novel Design ◽  
Better Than

Abstract In this study, a novel design method for half-cycle and modified posicast controller structures is proposed for a class of the fractional order systems. In this method, all required design variable values, namely, the input step magnitudes and their application times are obtained as functions of fractional system parameters. Moreover, empirical formulas are obtained for the overshoot values of the compensated system with half-cycle and modified posicast controllers designed utilizing this method. The proposed design methodology has been tested via simulations and ball balancing real-time system. It is observed that the derived formulas are in coherence with outcomes of the simulation and real-time application. Furthermore, the performance of modified posicast controller designed using proposed method is much better than other posicast control method.

Preferential nitrate immobilization in alkaline soils

Soil Research ◽  
1992 ◽  
Vol 30 (5) ◽  
pp. 737 ◽  
Author(s):  
IJ Rochester ◽  
GA Constable ◽  
DA Macleod
Keyword(s):  
Acid Soil ◽  
Nitrification Inhibitor ◽  
Biological Significance ◽  
Nitrate Assimilation ◽  
Acid Soils ◽  
Ammonium Assimilation ◽  
Potassium Nitrate ◽  
Alkaline Soil ◽  
Alkaline Soils ◽  
Nitrate Immobilization

The literature pertaining to N immobilization indicates that ammonium is immobilized in preference to nitrate. Our previous research in an alkaline clay soil has indicated substantial immobilization of nitrate. To verify the preference for immobilization of nitrate or ammonium by the microbial biomass in this and other soil types, the immobilization of ammonium and nitrate from applications of ammonium sulfate and potassium nitrate following the addition of cotton crop stubble was monitored in six soils. The preference for ammonium or nitrate immobilization was highly correlated with each soil's pH, C/N ratio and its nitrification capacity. Nitrate was immobilized in preference to ammonium in neutral and alkaline soils; ammonium was preferentially immobilized in acid soils. No assimilation of nitrate (or nitrification) occurred in the most acid soil. Similarly, little assimilation of ammonium occurred in the most alkaline soil. Two physiological pathways, the nitrate assimilation pathway and the ammonium assimilation pathway, appear to operate concurrently; the dominance of one pathway over the other is indicated by soil pH. The addition of a nitrification inhibitor to an alkaline soil enhanced the immobilization of ammonium. Recovery of 15N confirmed that N was not denitrified, but was biologically immobilized. The immobilization of 1 5 ~ and the apparent immobilization of N were similar in magnitude. The identification of preferential nitrate immobilization has profound biological significance for the cycling of N in alkaline soils.

scholarly journals The Performance of the Serbian Hotel Industry / Performanse Hotelskog Poslovanja U Srbiji

2013 ◽  
Vol 10 (2) ◽  
pp. 24-31
Author(s):  
Saša I. Mašić
Keyword(s):  
Economic Crisis ◽  
Business Performance ◽  
Operating Performance ◽  
National Level ◽  
Hotel Industry ◽  
National Average ◽  
Significant Decline ◽  
Foreign Tourist ◽  
The City ◽  
Better Than

AbstractThe aim of this paper is to determine operating performance of hotel companies in Serbia. The analysis was conducted on a sample that included approximately 31.35% of the total available hotel capacity in Serbia for the period from 2004 to 2011. The sample was designed to be representative of the hotel distribution by territory and category. Business performance of hotel companies was analyzed using TREVPAR and GOPPAR indicators both at the national level, for tourism clusters and the largest Serbian cities. The results show that hotel companies in Serbia, on average, achieved low TREVPAR and GOPPAR values. In 2011, the average TREVPAR of companies in Serbia was 28 EUR, and GOPPAR approximately 3.7 EUR. The study registered a significant decline in the value of these indicators for the period from 2008 to 2011, primarily as a result of the economic crisis. Results significantly better than the national average were achieved by hotel companies from Belgrade that had a mean TREVPAR value of 46.2 EUR and GOPPAR value of 8.6 EUR. During the analyzed period, the largest increase in the value of the analyzed indicators was registered in the city of Kragujevac as a result of significant investments made by the car manufacturer “Fiat” and its sub-contractors. These investments have led to a significant increase in the number of foreign tourist arrivals and consequently to an increase in business performance of hotel companies in Kragujevac.

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