Vapor condensation on a turbulent liquid interface

An experimental investigation which seeks the fundamental relationship between the interfacial condensation rate and the parameters which control it when the liquid side is turbulent is discussed. The scaling laws for free-surface condensation are discussed for this case. It is argued that the condensation of cryogenic liquids can, in principle, be simulated in experiments using steam and water. Data are presented for the condensation rate in terms of the dimensionless scaling parameters which involve the fluid properties and the liquid-side turbulence velocity and length scales

An EWMA Control Chart for Monitoring the Mean of Skewed Populations Using Weighted Variance.

This paper discusses the use of weighted variance (wv) in setting up the limits of the exponentially weighted moving average (EWMA) chart for the monitoring of the mean of a process from a skewed population. This chart, called the WV-EWMA chart hereafter, reduces to the standard EWMA chart when the underlying distribution is symmetric

A Study On The Performances Of Mewma And Mcusum Charts For Skewed Distributions.

A multivariate chart, instead of separate univariate charts is used for a joint monitoring of several correlated variables

A Comparison Of The Performances Of Various Single Variable Charts.

Control charts are used for process monitoring and improvement in industries. Two charts are usually used in the monitoring of both the mean and variance separately

Proposed X and S control charts for skewed distributions

This paper proposes a weighted variance method to compute the limits of the X and S charts for skewed distributions.The proposed charts extend the weighted variance X and R charts in by enabling a process from a skewed distribution with moderate and large sample sizes to be monitored efficiently, hence producing more favourable Type-I and Type-II error rates than the charts in.Note that the charts in are only intended to be used for small sample sizes. The Type-I and Type-II error rates computed show that the proposed charts outperform the existing heuristic charts, as well as those in for moderate and large sample sizes, involving cases with known and unknown parameters, when the distribution of a process is skewed

Selected Heavy Metals and Polycyclic Aromatic Hydrocarbon in Commercial Fishes Caught From UMT Enclosed Lagoon

A study was carried out to determine the bioaccumulation level of heavy metal (Cu, Zn, Fe and Pb)and Polycylic Aromatic Hydrocarbon (PAHs) in muscle of commercial fish collected from Universiti Malaysia Terengganu enclosed lagoon, Terengganu. Five species of fishes were collected which were Ikan Susu (Chanos chanos), Ikan Haruan (Channa Striata), Ikan Bulan (Megalopas cyprinoides), Ikan Siakap Putih (Lates calcarifer) and Ikan Siakap merah (Lutjanus argentimaculatus). Concentrations of heavy metals were determined by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) while the 16 PAHs were determined by using gas chromatography-mass spectrometry (GC-MS). The average concentration of Zn, Cu, Pb, Cd and Fe were 93.1 g g-1 dry weight, 12.6 g g-1 dry weight, 1.29 g g-1 dry weight, 0.282 g g-1 dry weight and 0.161 g g-1 dry weight respectively. The Cd and Zn concentration in the fish muscle in this study exceeds the permissible limit that set by FAO/WHO but still below the permissible limit that set by Malaysian Food Regulation. The total PAHs concentration detected in all fish species range between 593 ng g-1 wet weight to 3331 ng g-1 wet weight. The highest concentration of total PAHs was detected in the tissues of Ikan Susu while the lowest was detected in the tissue of Ikan Haruan. The concentration of Benzo (a) Pyrene (BaP) in the fish muscle in this study has exceeded the permissible limit set by European Union. From the results, it can be concluded that all the fish samples collected are not safe for the human consumption. Long term consumption might increase risk of carcinogenic as the concentration of BaP has exceeded the permissible limit

Interpreting a 1 fb^-1 ATLAS Search in the Minimal Anomaly Mediated Supersymmetry Breaking Model

Recent LHC data significantly extend the exclusion limits for supersymmetric particles, particularly in the jets plus missing transverse momentum channels. The most recent such data have so far been interpreted by the experiment in only two different supersymmetry breaking models: the constrained minimal supersymmetric standard model (CMSSM) and a simplified model with only squarks and gluinos and massless neutralinos. We compare kinematical distributions of supersymmetric signal events predicted by the CMSSM and anomaly mediated supersymmetry breaking (mAMSB) before calculating exclusion limits in mAMSB. We obtain a lower limit of 900 GeV on squark and gluino masses at the 95% confidence level for the equal mass limit, tan(beta)=10 and mu>0.Comment: 18 pages, 11 figure