Exact Solution of Navier-Stokes Equations

In Navier-Stokes equations (NASA’s Navier-Stokes Equations, 3-dimensional-unsteady), wed iscover the exact solution by Newton potential function and time-function. We think the solution likely Newton potential function that be able to solve Laplace equation

O017 Parents’ experiences of having a child with Down Syndrome and sleep difficulties

Introduction This qualitative study that investigates parents’ experiences of having a child with Down Syndrome (DS) and sleep difficulties is a part of a broader mixed-method study entitled Sleep Difficulties in Children with Down Syndrome: An Evaluation of Parent/Carer and Family Quality of Life. Methods We conducted semi-structured interviews with 26 parents (fathers n = 4 and mothers n = 22), and reflexive Thematic Analysis (TA) was operationalised for data analysis. The interviews covered the following key topics: DS diagnosis; timeline of their child’s sleep patterns and difficulties; implications for parental sleep, day-time function, and well-being; family dynamics; and access to supports. Results Most participants described negative experiences at time of diagnosis, including not feeling listened to, and receiving inconsistent, insensitive and inadequate information and/or treatment. Most strikingly, no parents recall receiving sleep specific information. Most participants described their child’s sleep difficulties affecting their own sleep, day-time function and family dynamics, yet they commonly normalised these experiences. Such normalisation was a recurring theme across their experiences of having a child with DS and is contextualised by their accounts of resisting prejudiced attitudes towards their child since diagnosis. Discussion This is the first qualitative study to investigate parents’ experiences of having a child with DS and sleep difficulties. Implications include professional development for health care workers focusing on sleep as a significant comorbidity for these children, and awareness of families’ tendencies to normalise their experiences when delivering care.

Pengaruh Bauran Pemasaran Terhadap Keputusan Pembelian Kacang Edamame Oleh Konsumen Rumah Tangga Pada Pasar Swalayan

Edamame is a product which has a big advantage to be developed, specifically by the product's market, as it is good in terms of taste and nutrition. Hypermarkets nowadays sell edamame but they have not known what marketing mix affects consumer's purchasing decision towards edamame. This research aimed to find: 1) Consumer’s perception of edamame's marketing mix at hypermarkets in East Jakarta, 2) To Evaluate consumer’s purchasing decision of edamame at hypermarkets in East Jakarta, 3) The influence of edamame's marketing mix affecting consumer’s purchasing decision, 4) The largest influence of edamame's marketing mix which affects consumer’s purchasing decision. The method of this research used the survey method and the sampling method used was the non-probability sampling method with accidental sampling technique. A total of 100 respondents were calculated using the linear time function formula. The location of this research is chosen purposively which is 4 hypermarkets located in East Jakarta. The method of this research is descriptive analysis and path analysis. The results showed that: 1) Edamame’s marketing mix is done well according to the continuum line, 2) Consumer’s purchasing decision of edamame is done well according to the continuum line, 3) The marketing mix simultaneously significantly influenced consumer’s purchasing decision of edamame, 4) The promotion variable (X4) gives the biggest influence towards consumer’s purchasing decision of edamame. The implication of this research is to increase activities of promotions of edamame.

Suspending the “Time Domain” : Technological Tempor(e)alities of Media Infrastructures

Any media event is a time function of signals. In favor of a diagrammatic definition of technological media, media archaeological investigation is not only concerned with their structural “hardwired” level but with their operative unfolding-in-time as well. Such an understanding of techno-temporalities does not focus on phenomenal effects of media on humans but primarily refers to the microregimes within technological devices. In that sense, “hardwired temporality” refers to the infrastructuring of time by technologies and to temporal structures which are revealed from within techno-logical knowledge itself. From that arises an epistemology of technical processuality beyond the conventional notion of “time.”

The Association Between Well-Being and Objectively Measured Versus Self-Reported Smartphone Time

Recent correlational research links smartphone and social media use to lower well-being among Gen Z youth, yet other work suggests that the effects are small and unnoteworthy. However, these findings rely heavily on self-report. How accurate is self-reported smartphone time and are objectively measured screen activities associated with lower well-being than nonscreen activities? Finally, are some smartphone uses “better” for well-being than others? We addressed these questions by examining correlations among psychosocial well-being and smartphone time in 414 Gen Z participants. Although objective smartphone use (i.e., assessed via Apple’s Screen Time function) and self-reports were correlated at r=.55, most participants were unable to accurately estimate their smartphone time. Furthermore, the more they used their smartphones—whether assessed objectively or via self-report—the less happy they were (rs=–.14 to .17). However, some apps were associated with more well-being (e.g., Camera, News, Snapchat) and others with less (e.g., Facebook, Reddit, Tinder, Twitter).

Methods for predicting the noise of transport vessels propellers

Object and purpose of research. The object of the research is the cavitation noise of transport vessels propellers. The purpose is to analyze and generalize modern research and methods for predicting broadband noise induced by the operation of the transport vessels cavitating propellers. Materials and methods. A review of the research materials (published in the XXI century) on the cavitation noise of transport vessels propellers, in particular broadband noise, as well as the author's own research on the causes and physical aspects of the occurrence of broadband noise is carried out. Based on the Fourier analysis of the time functions of velocities and pressures in the flow near the propeller, the conditions for the occurrence of broadband noise at (4–10)-blade harmonics and the parameters that relate this noise to various types of cavitation on the propeller are found. Main results. A review of recent studies results devoted to the cavitation noise of transport vessels propellers has shown that the levels of the so-called broadband noise that occurs when the cavitating propeller operates in nonuniform flow at high (4–10)-blade harmonics are used as the basis for modern noise predicting methods. At the same time, the authors of the methods consider broadband noise only as a result of the tip vortices development. The paper considers and generalizes an alternative hypothesis of the broadband noise occurrence caused by the occurrence and collapse of cavities within the blade with the formation of a double-headed peak on the time function of pressures. The analysis of publications on the development of the vortex wake behind the propeller and the modeling of pressures at the buckling failure of the tip vortex spirals allowed to show that double pressure peaks can be formed in the flow during the development of the vortex wake behind the propeller. This made it possible to combine both hypotheses of the broadband noise formation – from the development of the tip vortex and from the occurrence and collapse of cavities on the blades – and to link the assessment of the growth possibility of high blade harmonics with the cavitation parameters. Conclusions. It is shown that modern research methods have made it possible to obtain new data on the mechanism of the occurrence and collapse of cavitation both on the blade and in the tip vortex. At the same time, the currently used methods for predicting cavitation and, in particular, broadband noise are very approximate and require refinement to assess the effect of various cavitation characteristics on broadband noise. The hypotheses of broadband noise occurrence and the proposed physical model covering both vortex cavitation and the formation and collapse of cavities can serve as a basis for such clarification.

Small Circuits and Dual Weak PHP in the Universal Theory of p-time Algorithms

We prove, under a computational complexity hypothesis, that it is consistent with the true universal theory of p-time algorithms that a specific p-time function extending bits to bits violates the dual weak pigeonhole principle: Every string equals the value of the function for some . The function is the truth-table function assigning to a circuit the table of the function it computes and the hypothesis is that every language in P has circuits of a fixed polynomial size .