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Characteristics of structurally transmitted hard disk drive (HDD) vibrations induced by different built-in vibration sources, including speakers, fans and a CD/DVD drive in a notebook PC, are examined. It is found that at the high frequencies above 1000 Hz, the structurally transmitted HDD out-of-plane vibration is dominated by the vibrations induced by the speakers. The effects of the chassis design and HDD mounting on vibration transmission from speakers to HDD via chassis in the notebook PC are investigated. It is concluded that, in general, softer chassis and softer HDD mounting is helpful in suppressing the structurally transmitted vibrations of HDD at frequencies above 1000 Hz in a notebook PC. Furthermore, the HDD softer mounting modes should be kept away from the low order harmonics of the built-in fans and CD/DVD drive. [ABSTRACT FROM PUBLISHER]

The article presents a case of 63-year old woman with increasing abdominal distension for several months and acute onset breathlessness. The woman had experienced a single episode of jaundice and underwent precutaneous liver biopsy. Clinical examinations showed tachypnoea, a clear chest and moderate ascites with no stigma of chronic liver disease. Later in her admission, she suffered a significant fresh hematemesis.

Our detailed study on the chemical constituents of the stem bark of Calophyllum benjaminum and Calophyllum javanicum has resulted in one new coumarin benjaminin (1), five xanthones fuscaxanthone C (2), β-mangostin (3), thwaitesixanthone (4), dombakinaxanthone (5) and caloxanthone A (6), together with four common triterpenes friedelin (7), β-sitosterol (8), lupeol (9) and stigmasterol (10). The structures of these compounds were elucidated using NMR, FTIR and GCMS. [ABSTRACT FROM AUTHOR]