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Environmental assessment of polyculture farming practice based on

macrobenthic assemblages: A study case at coastal area of Kaliwungu, Kendal (Central Java, Indonesia) (Article)

, , , , , , ,

Center of Marine Ecology and Biomonitoring for Sustainable Aquaculture (Ce-MEBSA), Diponegoro University, Tembalang, Semarang, 50275, Indonesia

Department of Mathematics, Faculty of Sciences and Mathematics, Diponegoro University, Tembalang, Semarang, 50275, Indonesia

Department of Chemistry, Faculty of Sciences and Mathematics, Diponegoro University, Tembalang, Semarang, 50275, Indonesia

Abstract

The purpose of this study was to determine environmental quality parameters using number of species, diversity and similarity of macrobenthic communities. This study was conducted at two locations, the Location I was a polyculture farming area, farming milkfish (Chanos Chanos) and black tiger shrimp (Penaeus monodon) and seaweed Gracilaria sp. in the coastal area of Mororejo, Kendal District, Central Java. Location II was the coastal area of PT. Plywood Indonesia, which is located adjacent to industrial activities as well as directly affected the tide. Systematic random sampling was employed, measuring physical-chemical parameters of water and sediment. Samples of macrobenthos were taken from the sediment. Data was analysed using diversity and evenness indices approach. Samples of macrobenthos were taken from the sediment using Eckman grab, then was analysed using diversity and evenness indices approach. Results showed that the Location I was dominated by Cerithidea cingulata and Terebralia sulcata (Potamididae), Minima batillaria (Batillaridae). The Location II was dominated by Cirratulus sp., Cirriformia sp. and Aphelochaeta (Cirratulidae) and Prionospio sp. (Spionidae), which are considered as indicators of disturbed area. This results implied that the use of area for both polyculture and industrial activities may lead to environmental

disturbance, thus environmental coastal management need to be applied in regular basis, both temporally and spatially. © 2016 Penerbit UTM Press. All rights reserved.

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Author keywords

Environmental disturbance Macrobenthos Moderately disturbed area Polychaete Polyculture

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Jurnal Teknologi

Volume 78, Issue 4-2, 2016, Pages 199-205

Putro, S.P.

^a 

Widowati

^b

Febri, I.J.

^a

Muhammad, F.

^a

Suhartana

^c

Suminto

^d

Sudaryono, A.

^d

Koshio, S.

^e 

a

b

c

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Professor Craig D. Williams, University of Wolverhampton, United Kingdom Professor I. S. Jawahir, University of Kentucky, United States

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Sustaining Fish Processing Industry to Support Global Maritime Axis

Chief Editor: Roy Hendroko Setyobudi (Jakarta, IDN) Editorial board: Daniel Khan (London, GBR), Fronthea Swastawati (Semarang, IDN), Maizirwan Mel (Kualalumpur, MYS), Mohamad Shafiur Rahman (Muscat, OMN), Nathalie Bourgongnoun (Brest, FRA), Praptiningsih Gamawati Adinurani (Madiun, IDN), Yuzo Shioi (Shizuoka, JPN)

Table of Contents

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Amir Husni, Setyaning Pawestri, Alim Isnansetyo

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Delianis Pringgenis, Ragil Susilowati

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Diana Rachmawati, Istiyanto Samidjan

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Eko Nurcahya Dewi, Lukita Purnamayati, Retno Ayu Kurniasih

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Florencius Eko Dwi Haryono, Sahala Hutabarat, Johannes Hutabarat, Ambariyanto Ambariyanto

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CRUDE CATHEPSIN ACTIVITY AND QUALITY CHARACTERISTIC OF SMOKED CATFISH [Pangasius pangasius (Hamilton, 1882)] PROCESSED BY DIFFERENT SMOKING TEMPERATURE

Fronthea Swastawati, Ahmad Ni’matullah Al Baarri, Tri Winarni Agustini, Eko Nurcahya Dewi, Ima Wijayanti, Dwi Yanuar Budi Prasetyo, Daniel Khan

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MOLECULAR CHARACTERIZATION OF Dunaliella salina AND Chlorella vulgaris FUSANT USING 18SrDNA GENE

Hermin Pancasakti Kusumaningrum, Muhammad Zainuri

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THE INFLUENCE ANALYSIS OF DIFFERRENTLY CONSTRUCTED FOLDED TRAPS AND TYPES OF BAITS TO CATCH CRABS [Portunus pelagicus, (Linnaeus,1758)] IN REMBANG SEA WATERS

Herry Boesono, Sansan Sansan, Agus Suherman

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Lis Rostini, Nia Kurniawati, Junianto Junianto

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AN INTRODUCTION TO FLOATING TREATMENT WETLANDS AND ITS APPLICATION POTENTIAL FOR PDF

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Istiyanto Samidjan, Diana Rachmawati

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Laras Rianingsih, Ratna Ibrahim, Apri Dwi Anggo

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Latif Sahubawa, Juju Junengsih, Ustadi Ustadi

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THE PHYSICOCHEMICAL CHARACTERISTICS AND ANGIOTENSIN CONVERTING ENZYME (ACE) INHIBITORY ACTIVITY OF SKIPJACK TUNA (Katsuwonus pelamis) “BAKASANG”

Max Robinson Wenno, Eddy Suprayitno, Aulanni’am Aulanni’am, Hardoko Hardoko

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Mayanggita Kirana, Indah Susilowati, Kuperan Viswanathan

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ANALYSIS OF HEAVY METAL CONTENT IN Anandara granosa (Linnaeus, 1758): A CASE STUDY OF 10 MARKETS IN SEMARANG, CENTRAL JAVA, INDONESIA

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PDF

Copyright © 2012 Penerbit UTM Press, Universiti Teknologi Malaysia.

Disclaimer : This website has been updated to the best of our knowledge to be accurate. However, Universiti Teknologi Malaysia shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.

Best viewed: Mozilla Firefox 4.0 & Google Chrome at 1024 × 768 resolution.

78: 4-4 (2016) 59-63 | www.jurnalteknologi.utm.my | eISSN 2180–3722 |

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Teknologi Full Paper

NUMERICAL ANALYSIS ALGORITHM FOR INSPECTION POLICY PROCEDURE

Zoubir Layouni

^*

Department of Computer Science, Badji Mokhtar University, Algeria

Article history Received 25 October 2015 Received in revised form

14 December 2015 Accepted 9 February 2016

*Corresponding author zoubir.layouni@univannaba.dz

1.0 INTRODUCTION

In this paper we are concerned with the problem of inspection policy. Such actions are necessary for certain complex systems in order to detect failures that would otherwise not be apparent.

Let “ w “be a nonnegative random variable with probability distribution F ( x )  P ( w  x ) , - ∞ < x < + ∞.

It will be interpreted as the life length of the system. For convenience and without loss of generality, we assume that all random variables introduced here (included. w ) are defined on the same probability space (Ω,F,P).

The reliability (or survival probability) of the system corresponding to a mission of duration x is by definition

R(x)1F(x)

. If moreover, “ w ” has a density

f(x)F(x)

, then one can define the conditional failure rate at time t ^: r ( t )  f ( t ) / R ( t ) , or

0 ) ( if

) ( 1

) ( ) ( x 1 )

( lim







 



t R

t F

t F x t t F

r

o

x

(1)

The quantity r ( t ) dt  0 ( dt ) has a meaningful interpretation: it's the conditional probability of failure in the interval ( t  tdt ) given no failure had occurred before. t . If the conditional probability of failure during

the next interval of duration x of a system at age . t ^.

then :

) / ( - 1

) ( 1

) ( ) ) (

/ (

t x R

t F

t F x t t F x F







  ₍₂₎

Is such that R ( x / t )  R ( x ) for all x , t  0 _then e

x

x

R ( ) 

^

, the failure rate r (t ) =λ>0, and the MTBF (mean time before failure) t

_o

 1 /  . It's the well known "memory less property". Certain systems improve their performance in time, in the sense that

) / ( x t

R is increasing in    t   for each x  0 (3)

Abstract

In this paper, we present some tools helping us to make decision i.e., designing an optimal inspection measure. The approach is developed in search proposed by Hemodialysis center health, an implementation and computation program is developed.

This problem has also applications in the theories of reliability and can be modeled by a Markov chain structure; this can be done by parallel series or series parallel coherent structures. The algorithms are encouraging and measure can be found.

Keywords: Reliability theory, failure, renewal, optimal inspection policy, computational algorithms

© 2016 Penerbit UTM Press. All rights reserved

78: 3–2 (2016) 25–30 | www.jurnalteknologi.utm.my | eISSN 2180–3722 |

Jurnal

Teknologi Full Paper

MAGNETIC G ^RAPHENE O ^{XIDE AS} A ^DSORBENT

FOR THE R EMOVAL OF L ^EAD (II) ^FROM W ^ATER S ^AMPLES

Hamid Rashidi Nodeh,

^a

Wan Aini Wan Ibrahim,

^a*

Mohd Marsin Sanagi,

^a,b

a

Separation Science and Technology Group, Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia

b

Ibnu Sina Institute for Scientific and Industrial Studies, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia

Article history Received 10 February 2015 Received in revised form

20 November 2015 Accepted 20 November 2015

*Corresponding author wanaini@kimia.fs.utm.my, waini@utm.my

Graphical abstract Abstract

Magnetic Fe

3

O

4

nanoparticles were prepared on graphene oxide (Fe

3

O

4

/GO) in situ in a one step process. The obtained Fe

3

O

4

/GO was used as an adsorbent for the removal for Pb(II) from environmental water samples prior to flame atomic absorption spectroscopy measurement. The adsorption procedure was optimized as follows: 60 min adsorption time, 50 mL sample volume, solution pH 4.5, and 25 mg adsorbent dosage. Under the optimum conditions, the adsorption efficiency obtained was greater than 75% (C = 50 mg L

^-1

). The adsorption isotherm of Fe

3

O

4

@GO magnetic adsorbent was studied for Pb(II) adsorption using two isotherm adsorption models namely Langmuir and Freundlich. The adsorption isotherm data fits well with Langmuir isotherm (R

²

= 0.9988) rather than with Freundlich isotherm. The maximum adsorption capacity (q

m

) obtained was 86.2 mg g

^-1

. The results signified that the prepared Fe

3

O

4

/GO nanocomposite has a great adsorptive ability towards the Pb(II) from environmental water samples.

Keywords: Magnetic nanoparticles; graphene oxide; lead(II); adsorption capacity; Langmuir

isotherm model.

Abstrak

Nanopartikel Fe

3

O

4

magnetik telah disediakan atas grafin oksida (Fe

3

O

4

/GO) secara in-situ dalam proses satu langkah. Fe

3

O

4

/GO terhasil telah digunakan sebagai penjerap untuk penyingkiran Pb(II) daripada sampel air alam sekitar, sebelum pengukuran dengan spektroskopi serapan atom nyala. Prosedur penjerapan telah dioptimumkan seperti berikut: 60 min masa penjerapan, 50 mL isipadu sampel, pH larutan 4.5, dan 25 mg dos penjerap. Di bawah keadaan optimum kecekapan penjerapan yang diperoleh adalah lebih besar daripada 75% (C = 50 mg L

^-1

). Kapasiti penjerapan penjerap magnetik Fe

3

O

4

/GO dikaji untuk penjerapan Pb(II) menggunakan dua model penjerapan isoterma iaitu Langmuir dan Freundlich. Data penjerapan isoterma lebih sesuai dengan isoterma Langmuir (R

²

= 0.9988) berbanding dengan isoterma Freundlich. Kapasiti penjerapan maksimum, (q

m

) ialah 86.2 mg g

^-1

. Keputusan mengesahkan bahawa nanokomposit Fe

3

O

4

/GO mempunyai keupayaan penjerapan yang tinggi terhadap Pb(II) daripada sampel air alam sekitar.

Kata kunci: Nanopartikel magnetik; grafin oksida; plumbum(II); kapasiti penjerapan; model

isoterma Langmuir.

© 2016 Penerbit UTM Press. All rights reserved

78: 4 (2016) 49–57 | www.jurnalteknologi.utm.my | eISSN 2180–3722 |

Jurnal

Teknologi Full Paper

CHARACTERISATION AND MODELLING OF PEDESTRIAN FLOWS IN HOSPITAL AND ACADEMIC ENVIRONMENTS

Hashim Mohammed Alhassan

^a*

, Nordiana Mashros

^b

a

Department of Civil Engineering, Bayero University, Kano, Nigeria

b

Department of Geotechnics and Transportation, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia

Article history Received 30

^th

April 2015 Received in revised form

10

^th

August 2015 Accepted 1

^st

October 2015

*Corresponding author hmalhassan.civ@buk.edu.ng

Graphical abstract Abstract

This paper examined pedestrian characteristics in two urban facilities namely a teaching hospital and a university campus. The aim was to determine if pedestrian flow features in these facilities differed from those in downtown areas. The objectives were to measure pedestrian flow rates and model their walking behaviour. Eleven sites located within these facilities were selected for study. The results indicated that the male walked faster than the female in the university campus while the female was faster in the hospital environment.

Also the university campus saw more groups of pedestrians in the traffic mix than was the case in the hospital environment where 93% of the pedestrians were in single files. The male walked faster than the female by 7% in the university environment while the female were faster by 4% in the hospital environment. The modelling effort showed that the free walking speed in the university environment was 68.052 m/min with a critical density of 3.15 ped/m

²

. That of the hospital environment was 75.099 m/min and a critical density of 4.36 ped/m

²

. Since the speed-density relationships for the two facilities revealed a highly randomized plot, the data was fit to the normal distribution and pdf and cdf were used to assess the quality of the flow. For the university environment the results showed that 15% of the combined pedestrians walked below 56.88 m/min while 50% of the pedestrians walked below 66.67m/min and 85% walked below 72.50 m/min. Similarly, the results of the hospital environment showed that 15

^th

percentile of the combined pedestrians walked below 69.75 m/min. The median speed of pedestrians was 72.50 m/min while 85% of the pedestrians walked below 75.25 m/min. In both cases, the 15 percentile speeds were 14% and 18.5%

less than the median speeds in both facilities respectively. Thus flow breakdowns are unexpected in the two facilities.

Keywords: Pedestrian characteristics, flow, density, walking speed, group size, male,

female

© 2016 Penerbit UTM Press. All rights reserved

1.0 INTRODUCTION

Considerable efforts have been devoted to pedestrian studies in urbanized areas with a view to understanding their needs and movement patterns. Pedestrian flow is characterized by personal features such as moving, stopping, waiting, walking in groups, reneging in a movement, or engaging in cross movement. Thus

pedestrian movement could be complex and could involve personal decision making unpredictable by observers. Inspite of the advancement in technology, walking cannot be eliminated as a mode of transport and it is the mode upon which every trip ultimately depends on.

There is an abundance of pedestrian studies

addressing several issues such as crossing behaviour at

78: 4–4 (2016) 129–133 | www.jurnalteknologi.utm.my | eISSN 2180–3722 |

Jurnal

Teknologi Full Paper

MATHEMATICAL MODELING OF POROUS ADSORPTION LAYERS USED IN A MEMBRANOUS GAS SEPARATION

Zhanat Umarova

^a

, Anar Makhatova

^b*

, Aiman Kozhabekova

^b

,Darkhan Ydyrysbayev

^b

, Gairatzhan Mavlankulov

^c

a

Department of Information Systems, South Kazakhstan State University, Tauke Khan avenue, 5, Shymkent, Kazakhstan

b

Department of Computer Science, South Kazakhstan State University, Baytursinov street, 5, Shymkent, Kazakhstan

c

Department of Communication Technology and Network, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor D.E., Malaysia

Article history Received 25 October 2015 Received in revised form

14 December 2015 Accepted 9 February 2016

*Corresponding author Zhanat-u@mail.ru gairatjon@gmail.com

Abstract

The article considers the analysis of the membrane surface resistance influence on a mass transfer intensity. Objective of the analysis was to develop approaches for engineering calculation of the process. The article carries out analysis of modern approaches for description of different porous adsorption layers’ structure and offers new models of porous adsorption layers used in a membranous gas separation modeling as well.

Keywords: Modeling; porous adsorption layers; porousness; substance flow; membranes; ultrafiltration.

© 2016 Penerbit UTM Press. All rights reserved

1.0 INTRODUCTION

The most sound and practically useful classification system of porous adsorption layers, offered for the first time in the work [1], then it achieved some progress in the works [2]. In accordance with this approach, it is sufficient to detail two characteristics to cover all the diversity of the adsorbents’ porous layers structures.

These characteristics include formation mechanisms of porous systems and general nature of the structure.

According to the first characteristic, the most of the systems can be divided into two large groups. The work [4] conditionally specifies them as a system of growth and system of addition. On the principle of structure difference, the adsorption layers can be divided into porous layers with clearly ordered structure and chaotic structure layers.

The system of growth is usually characterized by a specific morphology, “structure morphology”, often unique in any other process. The systems of growth

include coke, pumice stone, sponge, foam, active carbons, zeolites, Colmacel, etc. The well founded approach to the modeling of addition layers lies in their consideration as a mass accumulation of finished elements of any shape.

2.0 STATEMENT OF THE PROBLEM

Let’s note key problems occurring during the modeling, and then let’s set possible ways for their solution.

The main structural characteristic of the adsorption layer is its porousness or porosity ε ^{. We}

should understand that the porousness is a macroscopic feature of the layer and can be determined only on very large sites of porous systems with a great number of elements.

The stochastic “component” of description in this

case can be presented as follows, if take ( 1   ), for