Cycles and Diamonds: How Management Consultants Diverge and Converge in Organization Design Processes

Divergence and convergence are both important elements of organizational design processes. This is often stated in the normative design literature, but it has hardly been studied empirically. How do designers of organizations diverge and converge in practice? Do they first develop alternatives and then choose the best one? Do they go through one or more successive cycles? And what makes them choose a certain route? In an in‐depth study of management consulting, we identified five different routes for diverging and converging in practice: one route for simple situations and four routes for complex situations. These routes differ in their sequence of activities, in their use of alternative solutions, and in their focus on content or on politics. It is shown that most design processes appear diamond‐shaped, with a divergent and a convergent side, but that these diamonds are often coloured or even fake, especially in socio‐politically complex situations. Pseudo‐divergence, i.e., the process of apparent divergence in public, is widespread.     

The biology of vernix caseosa

The biology and physical properties of the uniquely human skin cream 'vernix caseosa' are discussed. This material coats the foetal skin surface during the last trimester of gestation and provides multiple beneficial functions for the foetus and newborn infant. Vernix has a complex structure similar to stratum corneum but lacks lipid lamellae and is more plastic due to the absence of desmosomal constraints. In utero, vernix is made in part by foetal sebaceous glands, interacts with pulmonary surfactant, detaches into the amniotic fluid, and is swallowed by the foetus. At the time of birth, vernix has a remarkably constant water content approximating 80%. Postnatally, vernix is simultaneously a cleanser, a moisturizer, an anti-infective, and an anti-oxidant. Vernix facilitates acid mantle development and supports normal bacterial colonization. Its hydrated cellular structure and unusual lipid composition provide a 'best' solution for the needs of the foetus and newborn, not least of which is the attraction of caregivers. Vernix is an important natural biomaterial of potential interest to cosmetic scientists, and other disciplines involved in product development and therapies targeting the complex interface between the stratum corneum and a changing terrestrial environment.     

Coagulase-negative Staphylococcus species in bulk milk: Prevalence,distribution, and associated subgroup- and species-specific risk factors

Coagulase-negative staphylococci (CNS) have become the main pathogens causing bovine mastitis in recent years. A huge variation in species distribution among herds has been observed in several studies, emphasizing the need to identify subgroup- and species-specific herd-level factors to improve our understanding of the differences in ecological and epidemiological nature between species. The use of bulk milk samples enables the inclusion of a large(r) number of herds needed to identify herd-level risk factors and increases the likelihood of recovering enough isolates per species needed for conducting subgroup- and, eventually, species-specific analyses at the same time. This study aimed to describe the prevalence and distribution of CNS species in bulk milk samples and to identify associated subgroup- and species-specific herd-level factors. Ninety percent of all bulk milk samples yielded CNS. Staphylococcus equorum was the predominant species, followed by Staphylococcus haemolyticus and Staphylococcus epidermidis. A seasonal effect was observed for several CNS species. Bulk milk samples from herds with a loose-pack or a tiestall housing system were more likely to yield CNS species compared with herds with a freestall barn, except for S. epidermidis, Staphylococcus simulans, and Staphylococcus cohnii. In September, herds in which udders were clipped had lower odds of yielding Staphylococcus chromogenes, S. simulans, and Staphylococcus xylosus, the CNS species assumed to be most relevant for udder health, in their bulk milk than herds in which udder clipping was not practiced. Bulk milk of herds participating in a monthly veterinary udder health-monitoring program was more likely to yield these 3 CNS species. Herds always receiving their milk quality premium or predisinfecting teats before attachment of the milking cluster had lower odds of having S. equorum in their bulk milk. Herds not using a single dry cotton or paper towel for each cow during premilking udder preparation were more likely to have S. cohnii-positive bulk milk. Herds in which flushing with hot water or steam of the milking cluster after having milked a cow with a (sub)clinical mastitis was applied, were less likely to yield S. simulans, S. haemolyticus, and S. cohnii in their bulk milk. Always wearing gloves during milking decreased the odds of having Staphylococcus devriesei-positive bulk milk. Tap water from the public drinking system used as drinking water increased the odds of yielding S. simulans in the bulk milk. In conclusion, CNS are highly prevalent in bulk milk and might originate from the environment for some species (we hypothesize this is true for S. equorum or S. cohnii), or from within the udder (e.g., for S. simulans). Studies collecting bulk milk and quarter milk samples at the same time along with environmental samples are needed to determine the exact origin of the different (subgroups of) CNS species present in bulk milk using strain-typing techniques.     

O2 evolution on nickel-cobalt alloys

The electrochemical formation of oxides on nickel-cobalt alloys was investigated with cyclic voltammetry and ellipsometry. The electrocatalytic behaviour for oxygen evolution of the Ni₁Co₂ alloy changes with the pretreatment. After potentiodynamic cycling, a Tafel slope of about 40 mV was found, whereas after preanodization a Tafel slope of 60 mV and an increase in overpotential is observed. The difference in catalytic performance can be explained by the different nature of the electrochemically formed oxides on the Ni₁Co₂ alloy: either by assuming that spinel-like oxides are formed on the Ni₁Co₂ alloy or that, depending on the pretreatment, the alloy electrode behaves predominantly as a nickel or as a cobalt electrode. The two different pretreatments lead optically to the same two-layer film model, ie a first layer with a refraction index N = 2.3-0.1i and the second with N = 2.9-2.1i, but with a difference in thickness of the first layer.     

Ellipsometry and Other Reflection Techniques

A survey is given of some optical methods that are used to investigate the metal surface and thin oxide films on the metal. These optical techniques allow observation of the film during the actual process of film growth on the metal in a metal/electrolyte or metal/gas system. Besides ellipsometry multiple reflection, modulated reflectance spectroscopy and internal reflectance spetroscopy are discussed.