Rawatan larut resapan menggunakan penjerap media komposit karbon teraktif, zeolit, batu kapur dan enapcemar sisa kertas

Kajian ini dijalankan bagi meneroka potensi WPS dan LS untuk menggantikan sebahagian AC dan ZEO dalam penghasilan media komposit baharu. Nisbah optimum AC-WPS (media hidrofobik) adalah 2:2, manakala ZEO-LS (media hidrofilik) adalah 25:15. Nisbah optimum 4:4 media hidrofobik-hidrofilik dipilih berdasarkan ciri-ciri penjerapan NH3-N dan COD, dan 30 % OPC telah digunakan sebagai bahan pengikat. Media komposit ZELPA telah dihasilkan dan pencirian sifat fizikal-kimia dilakukan. ZELPA digunakan dalam kajian isoterma penjerapan NH3-N, COD dan warna pada keadaan optimum pH 7, kelajuan goncangan 200 rpm, saiz partikel 1.18-2.36 mm dan masa sentuhan 120 minit. Setelah ujian kelompok dilaksanakan, ujikaji isoterma penjerapan dan kinetik penjerapan dilakukan. Kapasiti penjerapan untuk kesemua parameter (dalam mg/g) masing-masing 27.55, 48.08 dan 34.48. Kajian perbandingan menunjukkan keupayaan penjerapan ZELPA terhadap NH3-N dan COD adalah lebih baik daripada ZEO dan AC, dan setanding dengan AC bagi penjerapan warna. Kajian kinetik penjerapan mendapati ZELPA mengikuti hampir kesemua model yang dikaji iaitu pseudo tertib pertama dan kedua, Elovich dan pembauran intra-partikel. Kajian penjerapan turus dengan menggunakan model EBCT menunjukkan penyingkiran sebanyak 99 % untuk NH3-N dan 98 % untuk COD dan warna. Kapasiti bolos dan masa tepu didapati makin berkurangan dengan berlakunya peningkatan terhadap kadar aliran. Didapati data uji kaji lebih mematuhi Model Thomas dan Yoon-Nelson berbanding Adams-Bohart. ZELPA boleh digunakan semula selepas menjalani ujikaji regenerasi dengan larutan 0.5 M NaCl pada pH 11-12 (dilaras dengan 1 M NaOH). Dengan kapasiti penjerapan untuk NH3-N, COD dan warna (dalam mg/L) masing-masing 32.26, 38.76 dan 31.95. Gabungan media alternatif WPS dan LS menunjukkan impak positif dalam penjerapan larut resapan. Penggunaan WPS dalam teknologi penjerapan secara tidak langsung berupaya menangani masalah pelupusan sisa kertas yang tidak boleh dikitar semula

The development of mobile robot for air pollution data capture (POPOBOT)

In the Modern era, the environmental issues have given significant impact to the human live. The air pollution indoor and outdoor environment sometimes dangerous to the human health and it needs to be justified. To fulfill this purpose, telemeasurement process and technique should be used. Therefore, in this research, the mobile robot with equipped by several air quality parameters sensors is developed. The robot is controlled using remote control and using wireless connection system. The air quality in target area will be monitored by using sensors which will capture data and send it to the Central Control (laptop) for analyzing. And then to be able monitor certain area investigation, the mobile robot is guided by using wireless camera. Result from this project can make user to monitor and navigate the target area by using mobile robot and this can make user know the situation on that area. PIC16F887A has been chosen in this project as the main device which is controlling all activities of the mobile robot. Data capture and robot movement has been done in wireless to make user easy to do the monitoring activities. From result, knowing that the error percentage of the data capture is small compare to the digital meter. So from that knowing this project is effective because it make user easy to do air pollution monitoring process also can prevent the gas poisoning cases from happen

What really matters? The elusive quality of the material in feminist thought

The concept of the 'material' was the focus of much feminist work in the 1970s. It has always been a deeply contested one, even for feminists working within a broadly materialist paradigm of the social. Materialist feminists stretched the concept of the material beyond the narrowly economic in their attempts to develop a social ontology of gender and sexuality. Nonetheless, the quality of the social asserted by an expanded sense of the material - its 'materiality' - remains ambiguous. New terminologies of materiality and materialization have been developed within post-structuralist feminist thought and the literature on embodiment. The quality of 'materiality' is no longer asserted - as in materialist feminisms - but is problematized through an implicit deferral of ontology in these more contemporary usages, forcing us to interrogate the limits of both materialist and post-structuralist forms of constructionism. What really matters is how these newer terminologies of 'materiality' and 'materialization' induce us to develop a fuller social ontology of gender and sexuality; one that weaves together social, cultural, experiential and embodied practices

The physicochemical and antioxidant properties of double-boiled kelulut honey

Kelulut honey is a unique Malaysian food that has beneficial components and high potential in many health aspects. In commercial processing plant, honey is usually subjected to thermal treatment, where its quality is compromised due to unstable and thermolabile components. Therefore, double boiling was chosen as it does not exert significant heat, thus minimizes damage done. The quality was determined after treated by double boiling technique at optimized condition. Three different sources of Kelulut honey based on the main types of foods consumed by the bees (Coconut, Multifloral and Wild Flowers) were tested. Kelulut honey samples were subjected to an optimized condition at 60 °C for 35 minutes. Thermal treatment at the same condition was conducted for comparison purpose. The results showed that double boiling treatment increased the total phenolic content of Kelulut-C honey significantly, from 2430.78 ± 12.24 to 2711.10 ± 23.00 mg GAE/100 g. The treatment also significantly increased the brown pigment for both Kelulut-C and Kelulut-W honey by 11.11 ± 0.00% and 27.27 ± 0.00%, respectively. Whereas, the pH and moisture content of all samples remain unchanged with no formation of hydroxymethylfurfural (HMF) was observed. A preliminary four-week storage study showed that double boiling treatment improves physicochemical properties of Kelulut honey as compared to the untreated samples for all three types of Kelulut honey tested. Meanwhile, a room temperature (27 °C) condition leads to an improvement of antioxidant properties as compared to cold temperature (4 °C). In conclusion, double boiling treatment has established itself as a good alternative processing method for Kelulut honey, hence increasing the possibility to bring forward Kelulut honey as a unique source for the application in food and beverages industries

Solution of Linear Programming Problems using a Neural Network with Non-Linear Feedback

This paper presents a recurrent neural circuit for solving linear programming problems. The objective is to minimize a linear cost function subject to linear constraints. The proposed circuit employs non-linear feedback, in the form of unipolar comparators, to introduce transcendental terms in the energy function ensuring fast convergence to the solution. The proof of validity of the energy function is also provided. The hardware complexity of the proposed circuit compares favorably with other proposed circuits for the same task. PSPICE simulation results are presented for a chosen optimization problem and are found to agree with the algebraic solution. Hardware test results for a 2–variable problem further serve to strengthen the proposed theory

The effect of time manipulation on immersion in digital games

Many empirical studies look into identifying factors that influence the quality of experience in video games. In this paper, we present research into the effect of playing time and players’ perception of the time on their immersion in the game. We invited 20 participants to play a puzzle game Bejeweled 2 for 7 min. They played the game in two conditions, namely, correct time (timer was programmed to be exactly 7 min) and wrong time (the countdown was set to be for 6 min, but was presented as a 7 min timer to the player). Players’ immersion scores were measured after the game using the IEQ. The results show no significant difference in immersion scores between the two conditions and participants’ comments also revealed that they perceived no difference in playing time between the conditions. This suggests that there is a dissociation between gaming time and subjective experience of gaming. Further research is required to investigate the relationship between playing time and positive gaming experiences