Reply to Masterson

1971 ◽  
Vol 1 (3) ◽  
pp. 383-385
Author(s):  
John Charvet

Masterson criticizes my argument concerning the incoherence of the principle of equality of opportunity on three grounds: (a) that I assume that ‘if a principle cannot be effected absolutely it must be discarded as a principle’ (p. 2), whereas he claims that so long as one can move in the direction of realizing the principle, then it can be a tenable working principle; (b) that I seem to believe that if a principle can be overruled by another principle in particular cases, it ceases to be a valid principle (p. 3); and (c) that I assume that a principle must apply to all cases, whereas he claims that a principle could be formulated so as not to apply to all cases (p. 5).

2019 ◽  
Vol 5 (1) ◽  
pp. 97-106
Author(s):  
Rudi Budi Agung ◽  
Muhammad Nur ◽  
Didi Sukayadi

The Indonesian country which is famous for its tropical climate has now experienced a shift in two seasons (dry season and rainy season). This has an impact on cropping and harvesting systems among farmers. In large scale this is very influential considering that farmers in Indonesia are stilldependent on rainfall which results in soil moisture. Some types of plants that are very dependent on soil moisture will greatly require rainfall or water for growth and development. Through this research, researchers tried to make a prototype application for watering plants using ATMEGA328 microcontroller based soil moisture sensor. Development of application systems using the prototype method as a simple method which is the first step and can be developed again for large scale. The working principle of this prototype is simply that when soil moisture reaches a certainthreshold (above 56%) then the system will work by activating the watering system, if it is below 56% the system does not work or in other words soil moisture is considered sufficient for certain plant needs.


Author(s):  
Roberta Gatti ◽  
Sandor Karacsony ◽  
Kosuke Anan ◽  
Celine Ferre ◽  
Carmen de Paz Nieves

Author(s):  
M. K. Savkin ◽  
A. R. Filatov

Nowadays majority of navigation methods, used in unmanned flying vehicles, are based on satellite navigation systems, such as GPS or GLONASS, or are amplified with them. But hardware, that uses such systems, can’t work in difficult conditions, for example causes by relief: with insufficient number of satellites or at low satellite signal. Satellite navigation systems are vulnerable for methods of radio defense: satellite signal can be deadened or replaced. That is why such systems usage is unacceptable while critical missions during military operations, emergency or reconnaissance. The article briefly describes components used for building alternative satellite-free navigation systems for flying vehicles. For each component its purpose and brief description of working principle are given, advantages and disadvantages are considered.


Author(s):  
T. M. Scanlon

Equality of opportunity requires that individuals should be selected for positions of advantage on the basis of relevant qualifications and that the ability to acquire these qualifications should not depend on the economic status of a person’s family. This chapter offers an institutional account of the moral basis of the first of these requirements. This account presupposes that positions of advantage are justified by the benefits they produce when they are held by individuals with the relevant abilities. The notion of ability relevant to considerations of procedural fairness therefore depends on the aims that justify the institution in question and on the way it is organized to promote these aims. The chapter relates this idea of fairness to the ideas of equal concern and non-discrimination and discusses the implications of procedural fairness for affirmative action.


Author(s):  
Robert Sugden

Chapter 8 asks what properties a market economy must have if it is to be psychologically stable—that is, if it is to reproduce a general belief that its governing principles are fair. I argue that, because of the division of knowledge and because the opportunities open to each person depend on how other people choose to use their opportunities, full equality of opportunity is not compatible with a market economy. Psychological stability has to rest on continuing expectations of mutual benefit, defined relative to a baseline that evolves over time and that cannot be justified in terms of abstract principles of fairness. However, if the market is to be recommended to each individual separately, each individual must be able to expect to share in the benefits that markets create. Maintaining such expectations typically requires redistributive mechanisms.


2021 ◽  
Vol 11 (7) ◽  
pp. 2909
Author(s):  
Weiqing Huang ◽  
Liyi Lai ◽  
Zhenlin Chen ◽  
Xiaosheng Chen ◽  
Zhi Huang ◽  
...  

Imitating the structure of the venous valve and its characteristics of passive opening and closing with changes in heart pressure, a piezoelectric pump with flexible valves (PPFV) was designed. Firstly, the structure and the working principle of the PPFV were introduced. Then, the flexible valve, the main functional component of the pump, was analyzed theoretically. Finally, an experimental prototype was manufactured and its performance was tested. The research proves that the PPFV can achieve a smooth transition between valved and valveless by only changing the driving signal of the piezoelectric (PZT) vibrator. The results demonstrate that when the driving voltage is 100 V and the frequency is 25 Hz, the experimental flow rate of the PPFV is about 119.61 mL/min, and the output pressure is about 6.16 kPa. This kind of pump can realize the reciprocal conversion of a large flow rate, high output pressure, and a small flow rate, low output pressure under the electronic control signal. Therefore, it can be utilized for fluid transport and pressure transmission at both the macro-level and the micro-level, which belongs to the macro–micro combined component.


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