Design and operating parameters of a fulidized bed for the combustion of municipal solid waste using standpipes air distributors

Hydrodynamic studies and combustion of simulated and actual municipal solid waste were carried out in a fluidized bed system. A wide range of parameters was investigated in hydrodynamic study after which the optimum parameters were implemented in the combustion studies. A newly fabricated standpipes air distributor (primary air inlet) was designed based on findings of the optimum orifice diameter, orifice distance and distance between pipes. Orifice diameter, orifice distance and distance between pipes of 3 mm, 10 mm and 70 mm were used in the hydrodynamic studies of circular and rectangular columns (CHS and RHS). The operating parameters investigated in the CHS and RHS included the effect of sand sizes and aspect ratios on the fluidization profile. Standpipes air distributors having the same orifice diameter and distance but with a wider pipe distance of 200 mm were used in the hydrodynamic studies of a bigger rectangular (big scale) column. Different air flow strategies were implemented to ensure good mixing between sand and samples and to investigate the penetration of the incombustibles into the sand bed. Parameters studied in the combustion of municipal solid waste included the effect of fluidizing velocity and air factor on the combustion profile in the bed as well as the freeboard region with standpipe air distributor design and dimension established from the hydrodynamic studies of a bigger scale rectangular column. Findings from the CHS and RHS showed that sand particles with mean size of 0.34 mm performed good fluidization profile compared to other coarser sand sizes. The ratio of the bed height over diameter of column (Dc) for good fluidization was determined at cDH?for the circular column whereas the ratio of the bed height (H) over the length (L) of column was observed at H<L for the rectangular columns. A two side air flow was seen as the best air flow strategy for good mixing in a bigger rectangular column. The range of fluidization number and air factor for the combustion of simulated municipal solid waste in a rectangular fluidized bed combustor was 5 – 7 mfUin which 5 mf U was found to be the optimum with air factor of 0.8 (primary air). Air factor of 0.4 (secondary air) was observed to show good temperature profile in the freeboard region for the combustion of municipal solid waste. The optimum total combined air factor for the combustion of municipal solid waste was 1.2 in which inlet primary air factor and inlet secondary air factor were 0.8 and 0.4, respectively

PERAN SUTRADARA DALAM PROSES KREATIF PRODUKSI FILM FIKSI PENDEK BERJUDUL 5 MIN 1

ABSTRACTION Marzuki Anwar, 201810040311390 The Role of the Director in the Creative Process of Short Fiction Film Production Titled 5 Min 1, 2024, Communication Science Study Program, Faculty of Social and Political Sciences, Muhammadiyah University of Malang. The short fiction film "5 Min 1" tells the journey of a child named Mugi who feels lonely because his parents lack attention because they are busy working. He decided to leave the house to find his identity and get rid of his loneliness and prove that he could live independently. On his journey he learned several lessons that led him to become better through Javanese philosophy. The goal that the creator wants to achieve is to know the role of the director, especially in the creative process of producing the short fiction film "5 Min 1" and to create work that can later become a reflection for the audience. The director's role in the creative process of producing the fictional short film "5 Min 1" includes character creation, artistry, shooting, use of sound, music, etc. always stems from the contents of the director's head. This creative process will influence the final result of the work. The following are the five stages of short film production, namely; 1) Idea/story development, at this stage the small idea will be developed into a story, determine the genre, etc. before finally becoming a mature script that is ready for production. 2) Pre-production, in this phase the team will be determined, discussing detailed technical matters regarding production, searching for locations, making production designs, ensuring preparations run well and are thorough. 3) Production, the stage where all the planning that has been done will be produced, the focus of the team and the actor's expertise will be greatly relied on. 4) Next, post-production, at this stage the process of editing the images and audio that have been taken (offline editing) is carried out, then the online editing process such as adding image effects, sound effects, coloring and music is carried out. 5) Film distribution, when the editing process is complete the film is said to be finished, then the film is ready to be distributed to film festivals, OTT, group/private viewing, etc

Measurement of true ileal calcium digestibility of feed ingredients for broiler chickens : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Animal Science at Institute of Veterinary, Animal and Biomedical Science (IVABS), Massey University, Palmerston North, New Zealand

Listed in 2017 Dean's List of Exceptional ThesesThe recent interest towards the use of digestible phosphorus (P) in poultry feed formulations necessitates the measurement of true calcium (Ca) digestibility of feed ingredients because of the close relationship between these two minerals for their absorption and post absorptive utilisation. When this thesis research was initiated, no published data were available on Ca digestibility of feed ingredients for broiler chickens. The major objective of the studies reported in this thesis was to determine the true Ca digestibility of feed ingredients for broiler chickens. In total, nine studies were conducted. The first study (Chapter 4) was conducted to determine the effect of methodology on ileal endogenous Ca losses. Three methods, namely feeding a Ca- and P-free diet, maize gluten meal based diet and egg albumen based diet, were used. Ileal endogenous Ca losses differed among different methodologies. The highest ileal endogenous losses of 125 mg/kg dry matter intake (DMI) were recorded on the Ca- and P-free diet, followed by 77 and 43 mg/kg DMI on maize gluten meal and egg albumen diets, respectively. In the second and third studies (Chapters 5 and 6), regression and direct methods, respectively, were used to determine the true Ca digestibility of meat and bone meal (MBM). The true Ca digestibility coefficient of MBM samples were ranged from 0.41 to 0.60. No difference was observed between true Ca digestibility coefficients of MBM determined by regression and direct methods. Since the direct method is less laborious and cost effective compared to regression method, this method was used in subsequent studies (Chapters 7 to 10) to determine the true Ca digestibility of a range of Ca sources. In fourth and fifth studies (Chapters 7 and 8), the influence of dietary P, particle size and Ca to non-phytate P ratio was investigated on the true Ca digestibility of limestone for broiler chickens. The true Ca digestibility of three limestone samples varied from 0.56 to 0.62. Supplementation with recommended dietary P (4.5 g/kg) increased the true Ca digestibility of limestone when compared to diets without P. An increase in particle size from <0.5 to 1-2mm improved the true ileal Ca digestibility of limestone. Widening the Ca to non-phytate P ratio reduced the true Ca digestibility of limestone for broiler chickens. The sixth study (Chapter 9) was conducted to determine the effect of Ca source and particle size on the true Ca digestibility and total tract retention. Limestone and oyster shell were used as Ca sources. No difference was observed between the true Ca digestibility of limestone and oyster shell. An increase in particle size from <0.5 to 1-2 mm increased both the Ca digestibility and retention of both Ca sources, and increased the Ca concentration of gizzard contents. The study reported in Chapter 10 was conducted to determine the true Ca digestibility of dicalcium phosphate (DCP), monocalcium phosphate (MCP), canola meal, poultry by-product meal and fish meal, and to compare the effect of dietary adaptation length on true Ca digestibility of DCP and MCP. The true Ca digestibility coefficients of these feed ingredients were lower than MBM, limestone and oyster shell, and ranged from 0.24 to 0.33. It was speculated that the length of adaption to the assay diets may be responsible for the lower than expected estimates. The effect of dietary adaptation length (24, 48 or 72 hrs) was subsequently examined, but had no effect on true Ca digestibility of DCP and MCP. In the final study (Chapter 11), the true Ca digestibility of DCP was determined using different methodologies (regression, difference and direct methods). The true Ca digestibility coefficients of DCP were 0.34 and 0.21 with direct and different methods, respectively. A very low digestibility coefficient of 0.13 was determined by the regression method. In conclusion, the true Ca digestibility coefficient of major Ca sources (limestone, oyster shell and MBM) is not high and varied from 0.40 to 0.70. Particle size of limestone and oyster shell influenced Ca digestibility, with coarser particles having higher digestibility. The direct method appears to be suitable for the determination of true Ca digestibility of limestone, oyster shell and MBM, but may not be appropriate for other Ca sources with intrinsic imbalance of Ca and P

Hubungan gaya pembelajaran dengan pencapaian akademik pelajar aliran vokasional

Analisis keputusan Sijil Pelajaran Malaysia (SPM) 2011 menunjukkan penurunan pencapaian bagi Sekolah Menengah Vokasional. Oleh itu, kajian ini dilaksanakan bertujuan untuk mengkaji hubungan di antara gaya pembelajaran dengan pencapaian akademik pelajar. Kajian ini juga ingin mengenalpasti gaya pembelajaran paling dominan yang diamalkan oleh pelajar serta melihat perbezaan gaya pembelajaran dengan jantina pelajar. Seramai 131 orang Pelajar Tingkatan Empat Kursus Vokasional Di Sekolah Menengah Vokasional Segamat di Johor telah terlibat dalam kajian ini. Soal selidik Index of Learning Style (ILS) yang dibangunkan oleh Felder dan Silverman (1991) yang mengandungi 44 soalan telah digunakan untukh menjalankan kajian ini. Gaya pembelajaran pelajar dapat dilihat melalui empat dimensi gaya pembelajaran yang terdiri dari dua sub-skala yang bertentangan iaitu dimensi pelajar Aktif dan Reflektif, dimensi pelajar Konkrit dan Intuitif, dimensi pelajar Verbal dan Visual, serta dimensi pelajar Tersusun dan Global. Data yang diperolehi dianalisis dengan menggunakan perisian Statistical Package for Social Science for WINDOW release 20.0 (SPSS.20.0). Ujian Korelasi Pearson digunakan untuk menganalisis data dalam mengkaji hubungan gaya pembelajaran dengan pencapaian akademik pelajar. Nilai pekali p yang diperolehi di antara gaya pembelajaran dengan pencapaian pelajar adalah (p=0.1 hingga 0.4). Ini menunjukkan tidak terdapat hubungan yang signifikan di antara dua pembolehubah tersebut. Kajian ini juga mendapati bahawa gaya pembelajaran yang menjadi amalan pelajar ialah gaya pembelajaran Tersusun. Hasil kajian juga mendapati bahawa tidak terdapat perbezaan yang signifikan di antara gaya pembelajaran dengan jantina pelajar

Public infrastructure and private sector profitability and productivity in Mexico

This paper specifies a microeconomic model to estimate the impact of investment in public infrastructure on private industrial profitability. Empirical results based on time series data for 34 industries characterize the Mexican industrial structure as having involuntary unemployment, deficient product demand, declining productivity growth, increasing returns to scale, and short run excess capital capacity. Aggregate technological change over the period studied has been capital using and labor saving.Both labor and capital are underused in the short run. This disequilibrium has high efficiency costs that may be undermining Mexico's international competitiveness. Therefore, new capital investment in the public sector is not recommended at this time and should be undertaken only to rectify any identified constraints imposed by the inadequacy of infrastructure in the private employment of private factors.Economic Theory&Research,Environmental Economics&Policies,Banks&Banking Reform,Public Sector Economics&Finance,Inequality

The Apple Tree

Consider an individual whose preferences are changing over time. How do we assess her welfare? We argue that this is an empirically relevant question as preferences are constantly changing over time if the agent has a bias towards the present. We present a simple example where preferences are changing over time (the apple tree) and use it to aid our discussion of welfare. We critically assess the approach that focuses on the decision maker (revealed preference) and the one that ignores the decision maker (long-run self) with reference to some recent literature. Finally, we look at some of the problems that arise when we consider a sovereign individual who aggregates her changing preferences.

Prevalence of Relative Poverty in Pakistan

The conceptual basis of poverty in Pakistan remained limited to absolute notion of poverty which has been criticised on the grounds that it minimises the range and depth of human needs. The paper broadens the discussion on poverty and poverty measurement by examining the prevalence of relative poverty in Pakistan. Based on the moderate relative consumption poverty line of Rs 775 per capita per month, the prevalence of relative poverty was at 40.7 percent in 2001-02. On the other hand, half of the population was below the income-based moderate relative poverty line, implying that 77.5 million individuals were poor in Pakistan. At the province level, the results suggest the highest prevalence of urban poverty in the NWFP, followed by Sindh, Balochistan, and Punjab. On the other hand, rural Sindh was the poorest region in the country, followed by the NWFP and Balochistan. The trends implied by the concept of relative poverty suggest a more rapidly increasing trend in relative poverty because of rising income inequality. As a result, gains in income accrued to the richest at the expense of the poorest and the middle income groups, implying that the rich got richer and the poor got poorer over the last 15 year. These results suggest that adverse distributional outcome may be due to the pursuance of stabilisation and adjustment programmes within the framework of the “Washington Consensus” which put too much emphasis on removing macroeconomic imbalances and enhancing economic growth while giving no consideration to equity and poverty. While economic growth alone is not enough for poverty reduction, there is a need to raise PRSP spending in order to pursue an effective poverty reduction strategy with a focus on redistributive policies. While the country has already made a commitment to attain the Millennium Development Goals, economic policies need to be expansionary. Poverty reduction strategy should be based on the policies of building up the assets of the poor and increasing the demand for those assets. An expansion of health and education for the low-income households and measures that increase the relative prices of agricultural commodities and the wages of unskilled labour should be part of new poverty reduction strategy. Focusing on agrarian strategies, especially those also favouring rural industrialisation, can lead to more egalitarian growth. Rapid expansion of labour-intensive exports may contribute to faster growth in employment. Policies to support this should favour labour-intensive techniques, e.g., by not subsidising capital and by securing more credit for small enterprises.

"A Dynamic Approach to the Theory of Effective Demand"

This paper attempts to resituate the theory of effective demand within a dynamic nonequilibrium context. Existing theories of effective demand, which derive from the works of Keynes and Kalecki, are generally posed in static equilibrium terms. That is to say, they serve to define a given level of output which corresponds to the equilibrium point between aggregate demand and supply. We propose to generalize this analysis in three ways. First, we will extend the analysis to encompass a dynamic (i.e. moving) short run path of output, rather than a merely static level. Second, we will show that this dynamic short run path need not imply an equilibrium analysis, since it can arise from either stochastically sustained cycles or deterministic limit cycles. And third, we will prove that the preceding generalization of the theory of effective demand will allow us to solve a long standing problem in growth theory: namely, the puzzle surrounding the apparently intractable instability of warranted growth.

Role of Growth and Inequality in Explaining Changes in Poverty in Pakistan

Changes in the extent of poverty are affected not only by growth in the mean income but also by changes in the distribution of income. The effect of these two factors can be separately measured by decomposing the total change in poverty. In this context, this paper uses new tools to quantify relative contribution of growth and inequality using the latest available household survey data. The findings of this paper suggest that the role of inequality remained important in mitigating the adverse effects of growth on poverty during the first period, 1998-99 to 2001-02. Alternatively, the role of growth has been fundamental in reducing absolute poverty in the second period, 2001-02 to 2004-05. Poverty would have been further reduced, had the distribution not worsened during this period. The policy implication is that while pursuit of growth as a strategy is important for poverty reduction in Pakistan, the contribution of redistribution in favour of the poor should not be ignored if the effect of growth on poverty reduction is to be enhanced. Thus, the major challenge is to pursue a poverty reduction strategy that is based on growth with redistribution.Poverty, Inequality, Economic Growth, Pakistan