The oberon system

In this paper we describe an operating system for a workstation designed and implemented by the authors within two and a half years. It includes memory management and module loader, a file system, a viewer system, editors for text and graphics, a compiler, a server interface and various tools. The primary motivation was to demonstrate the feasibility of a small, yet highly flexible and powerful, system, a system that is a (decimal) order of magnitude smaller than commonly used operating systems. This is possible due to regularity of concepts and concentration on the essential. The benefits are not only fewer resources needed, but elegance and generality of concepts resulting in transparency and convenience of use and increased reliability. A corner-stone of this approach is genuine extensibility, which is achieved by a new language, in particular by a facility called type extension. It allows for the integration of variables (objects) of a new, extended type in structures of elements of an existing base type.     

细茎野生蔗（S.spontaneum）F1品系花粉贮存的初步探讨

早花细茎野生蔗Ｆ１品系的花粉经干燥处理，在－２４℃～２８℃下贮存２５～３５天后与花粉量少、花粉发育率低的迟花亲本杂交。用贮存花粉授粉的２４个组合中，１８个获得实生苗，其中８个组合的克种在实生苗数达对照的２～２４倍，结果初步表明，在低温贮存下部分花粉的和可保存３５天，但由于用贮存花粉授粉的结实率太低，本文还不是解决细茎野生蔗Ｆ１品系与栽培品种的花期不遇问题的有效手段。     

乳化剂体系对乳化沥青储存稳定性影响研究

以中东原油生产的90号沥青为原料，考察了乳化剂体系对制备的乳化沥青储存稳定性的影响。结果表明，乳化剂的分子结构不同，对稳定性的影响不同；采用复合乳化剂可以提高乳化沥青的稳定性；适当的调配乳化剂溶液的浓度和pH值能够改善乳化沥青的储存稳定性。     

On the capacity fading of LiCoO2 intercalation electrodes:: the effect of cycling, storage, temperature, and surface film forming additives

The electrochemical behavior and surface chemistry of LiCoO₂ intercalation cathodes as a function of cycling and storage at 25, 45, and 60 °C was studied. The standard solutions for this work comprised ethylene carbonate (EC), ethyl-methyl carbonate (EMC), (1:2) and 1 M LiPF₆. The effect of two surface film-forming additives, vinylene carbonate (VC) and an organo-borate complex (denoted as Merck's AD25) in solutions was also explored. We analyzed temperature-dependent processes of surface film formation on the cathodes, which increase their impedance upon cycling and storage, thus making their electrochemical kinetics sluggish. We also analyzed cobalt dissolution from the cathodes at 25, 45 and 60 °C. The apparent capacity fading of the LiCoO₂ electrodes is attributed mostly to changes on their surface, rather than to bulk degradation. There are signs that the presence of HF in solutions may play a major negative role. Hence, as the electrode's surface/solution volume ratio is higher, the capacity fading of the LiCoO₂ electrodes should be lower. The main tools for this study were cyclic voltammetry, chronopotentiometry, impedance spectroscopy, electrochemical quartz crystal microbalance (EQCM), IR-spectroscopy, XRD, XPS, and SEM.     

Effects of storage temperatures on the antioxidative activity and composition of yam

The effects of storage temperatures on the composition and antioxidative activities of one kind of Taiwanese yam tubers, Tainung No. 1 (TNG1) (Dioscorea alata), were investigated at room temperature (20 ± 8 °C), 17 ± 2 and 10 ± 1.5 °C. Measurements of the antioxidative activities included reducing power and α,α-diphenyl-β-pricryl-hydrazyl radical-scavenging activity. The crude lipid and fibre contents decreased with storage time at all three temperatures, but the reducing sugar contents increased during storage. Both the reducing power and DPPH radical-scavenging activity of TNG1 decreased after 3 and 11 weeks at room temperature and 17 °C, respectively. At 10 °C, significant decline in the reducing power was found after 14 weeks, while the DPPH radical-scavenging activity tended to increase after 7 weeks due to the microbes causing rottenness.     

Diagonal stability of a class of cyclic systems and its connection with the secant criterion

We consider a class of systems with a cyclic interconnection structure that arises, among other examples, in dynamic models for certain biochemical reactions. We first show that a “secant” criterion for local stability, derived earlier in the literature, is in fact a necessary and sufficient condition for diagonal stability of the corresponding class of matrices. We then revisit a recent generalization of this criterion to output strictly passive systems, and recover the same stability condition using our diagonal stability result as a tool for constructing a Lyapunov function. Using this procedure for Lyapunov construction we exhibit classes of cyclic systems with sector nonlinearities and characterize their global stability properties.     

EFFECT OF COMBINATION METHODS ON INSECT DISINFESTATION AND QUALITY OF PLANT NUTS

Almond, groundnut, pinenut and walnut, were radiated (0.25 kGy) after packing in coloured and clear polyethylene bags (0.04mm) and subsequently stored for 24 weeks at room (16-36℃) and low temperatures (10-20℃). The effect of these treatments on insect infestation and quality was studied. It was observed that radiation (0.25 kGy) treatment in combination with low temperature (10-20℃) completely checked the insect infestation of nuts during 24 weeks of storage. Peroxidation was higher in samples stored at room than at low temperature. Storage period had a marked adverse influence on sensory quality of nuts, however, samples kept at low temperature were comparatively rated higher.     

Dynamic operating policies for periodic processes subject to equipment failures

The role of storage in buffering a process train from the effects of periodically reoccuring equipment failure is studied. The effects of deterministic and stochastic variations in the failure frequency and recovery time on the required size of intermediate storage are investigated. A dynamic operating policy is proposed to accommodate process variations in concern with the use of intermediate storage. Dynamic operation offers an increase in the average production rate of the process while using only modest levels of intermediate storage.     

微重力条件下40%充液旋转贮箱中液体再定位的计算

本文简要介绍微重力条件下，充液贮箱中非定常流体动力学行为的计算方法及计算程序。该程序专门用于微和流体行为的三维计算，具有多种选择，便于应用。文中给出了用该程序对４０％充液旋转贮箱中液体再定位的计算结果。计算是在ＣＲＡＹ－ＸＰ超高速计算机上完成的。