Children in an Urban Tanzania

One in four children being born in today‟s Tanzania is likely to be growing up in an urban area. It is projected to be one in three in the short time span of one generation. Tanzania is more urban than it perceives itself and official figures disclose. Urban Tanzanians feel emotionally rooted in their villages of origin rather than in the cities and towns where one quarter of the total population lives. Urbanisation figures fail to account for extensive high density areas just because they are not officially classified as urban. Despite a persisting rural self-representation, Tanzania is one of the fastest urbanising countries in one of the world‟s fastest urbanising regions. The nearly half urban population aged 0-18 may well be the first truly urbanised generation in the history of the nation.\ud As urbanisation is rapidly transforming the physical, social and economic landscape of the country, how has Tanzania equipped itself to provide adequate water, sanitation, health care, education, protection services to meet the fundamental needs and rights of a swelling number of urban children and communities? National policy and programmatic frameworks still broadly target rural poverty, perceived as the nation‟s core development challenge. Urban poverty, growing alongside urban affluence, remains mainly unaccounted for and, as a result, unaddressed. The condition of poor and marginalised urban groups escapes official urban figures. Standard urban-rural disaggregation generates statistical averages that overshadow sub-municipal disparities. Also poverty lines tend to underestimate actual poverty. Based on mere consumption levels, they disregard living conditions, thus leaving unaccounted for several necessities that poor households are normally forced to acquire through cash purchases in a monetised urban economy. As a result, urban poverty is broadly overlooked and poor urban children, lost in skewed official estimates and tucked away in peripheral unplanned urban fringes, risk remaining invisible in development policy and investments. In-depth analysis based on sub-municipal data is urgently needed to accurately measure urban poverty in its multiple dimensions of income poverty, inadequate access to basic services and powerlessness.\ud The assumption underpinning the limited attention that has been paid to urban poverty is that of an urban advantage. Undoubtedly, cities enjoy an edge over rural areas. Urbanisation drives the development of a whole nation. High population concentration, economies of scale, proximity and agglomeration make cities engines of growth. They offer greater avenues for livelihood and education, and should be expected to afford children better opportunities for survival, growth and development than rural areas. Better economic resources and political visibility hold a potential to offer higher incomes and enhance the scope for the government and the private sector to fund services and infrastructure. Density, favouring economies of scale, promises to favour delivering of essential services.\ud Children, adolescents and youth are attracted to city life, aspiring to access better jobs, higher education and a richer cultural life. Urban areas are also hubs of technological innovation, social exchange and mass communication. Urban children can draw from resources that are denied to rural peers.\ud The urban advantage, however, is being eroded. Provision of social services and infrastructure is failing to keep pace with growing demand being generated by urbanisation.\ud  Availability of basic services, expected to be markedly higher in urban centres as compared to remote rural areas, has been declining. Decreasing urban access to improved sources of drinking water over the past decade epitomises this trend. The traditional urban – rural social sector performance gap has been narrowing against most indicators in the areas of education, health, nutrition, water and sanitation. In some cases gaps have been actually bridged and rural areas are even outperforming urban centres.\ud 7\ud  As urban social sector performance is declining, it is likely that it is the poor, underserviced communities to remain unreached. Although statistical averages prevent any level of sub-municipal analysis, limited data available on access to basic services and health and education outcomes in low-income urban communities suggests that the urban poor may be faring even worse than their rural counterparts.\ud  Urbanisation growth is projected to continue in the future. If the present scenarios are not going to be addressed now, they are likely to deteriorate further. As density increases and unplanned settlements become more congested, investments in social facilities and infrastructure can only be expected to become costlier, both financially and socially.\ud If not properly leveraged, the potential advantage that cities offer can turn into a disadvantage. A concentration of children in areas where services and infrastructure are lacking is a major disadvantage. Children residing in overcrowded and degraded settlements characterised by poorly managed sanitation systems, inadequate provision of safe water, inefficient solid waste management are faced with one of the most life-threatening environments possible – with climate change posed to increase vulnerability further. Such a disadvantage can be daunting in a situation where the overwhelming majority of urban dwellers reside in unplanned settlements, which in Tanzania‟s primate city, Dar es Salaam, are estimated to accommodate over 80 percent of the population, one of the highest proportions in Sub-Saharan Africa.\ud Availability and access are not synonymous. In most cities, availability of basic services does not translate necessarily into access. Higher quality and availability of services needs to be equally distributed across social classes and space to achieve equal access by all citizens. The difference between successfully exploiting the urban advantage and passively reeling under the urban disadvantage can be made by the way access to resources is managed. A competent, accountable and equitable system of local governance can make that difference. Good local governance can help overcome the disparities that still bar access by the poor to safe water and sanitation, quality education, adequate health care and nutrition, affordable transport, secure land tenure and decent housing. Accountable local authorities, proactive communities and enabled children are the key actors in a local governance process leading to the creation of cities friendly to children.\ud Young people are already participating in local governance processes. They are active in children‟s municipal councils, children‟s school councils and other similar institutions. Avenues for child participation needs to be strengthened and opened to all children, not only in institutional settings, but also in families and communities having primary responsibility for children‟s well being. Cities and communities provide the most relevant scale for genuine children‟s participation, where young people can effectively engage in addressing the problems that directly affect them.\ud Though universal human rights and global development goals are set at the international and national levels, it is ultimately in a myriad of local Tanzanian communities that they are expected to be fulfilled – in the family, the school, the ward and ultimately the city. The city government offers an ideal platform for converging a plethora of sectoral interventions independently targeting children and delivering them holistically, at the local level where children live. The horizon of children is local. Within the local dimension, children‟s goals and rights can be met and monitored by duty bearers who have primary responsibility for their fulfilment. If development goals and human rights are not implemented locally, they are likely to remain abstract declarations of intent and sterile. Local authorities, communities, families and children together can transform today‟s child unfriendly urban settings into child-friendly cities – as cities friendly to children are friendly to all

The Very Being of a Conceptual Scheme: Disciplinary and Conceptual Critiques

Book review of: Jeff Kochan (2017), Science as Social Existence: Heidegger and the Sociology of Scientific Knowledg

Extraction of ∣Vcd∣|V_{cd}| and ∣Vcs∣|V_{cs}| from experimental decay rates using lattice QCD D→π(K)ℓνD \to \pi(K) \ell \nu form factors

We present a determination of the Cabibbo-Kobayashi-Maskawa matrix elements $|V_{cd}|$ and $|V_{cs}|$ obtained by combining the momentum dependence of the semileptonic vector form factors $f_+^{D \to \pi}(q^2)$ and $f_+^{D \to K}(q^2)$, recently determined from lattice QCD simulations, with the differential rates measured for the semileptonic $D \to \pi \ell \nu$ and $D \to K \ell \nu$ decays. Our analysis is based on the results for the semileptonic form factors produced by the European Twisted Mass Collaboration with $N_f = 2 + 1 + 1$ flavors of dynamical quarks in the whole range of values of the squared 4-momentum transfer accessible in the experiments. The statistical and systematic correlations between the lattice data as well as those present in the experimental data are properly taken into account. With respect to the standard procedure based on the use of only the vector form factor at zero 4-momentum transfer, we obtain more precise and consistent results: $|V_{cd} |= 0.2341 ~ (74)$ and $|V_{cs} |= 0.970 ~ (33)$. The second-row CKM unitarity is fulfilled within the current uncertainties: $|V_{cd}|^2 + |V_{cs}|^2 + |V_{cb}|^2 = 0.996 ~ (64)$. Moreover, using for the first time hadronic inputs determined from first principles, we have calculated the ratio of the semileptonic $D \to \pi(K)$ decay rates into muons and electrons, which represent a test of lepton universality within the SM, obtaining in the isospin-symmetric limit of QCD: ${\cal{R}}_{LU}^{D\pi} = 0.985~(2)$ and ${\cal{R}}_{LU}^{DK} = 0.975~(1)$.Comment: 8 pages, 2 figures, 8 tables. Version to appear in EPJ

Spin up and phase fluctuations in the timing of the accreting millisecond pulsar XTE J1807-294

We performed a timing analysis of the 2003 outburst of the accreting X-ray millisecond pulsar XTE J1807-294 observed by RXTE. Using recently refined orbital parameters we report for the first time a precise estimate of the spin frequency and of the spin frequency derivative. The phase delays of the pulse profile show a strong erratic behavior superposed to what appears as a global spin-up trend. The erratic behavior of the pulse phases is strongly related to rapid variations of the light curve, making it very difficult to fit these phase delays with a simple law. As in previous cases, we have therefore analyzed separately the phase delays of the first harmonic and of the second harmonic of the spin frequency, finding that the phases of the second harmonic are far less affected by the erratic behavior. In the hypothesis that the second harmonic pulse phase delays are a good tracer of the spin frequency evolution we give for the first time a estimation of the spin frequency derivative in this source. The source shows a clear spin-up of $\dot \nu = 2.5(7) \times 10^{-14}$ Hz sec$^{-1}$ (1 $\sigma$ confidence level). The largest source of uncertainty in the value of the spin-up rate is given by the uncertainties on the source position in the sky. We discuss this systematics on the spin frequency and its derivative.Comment: 17 pages, 4 figures, Accepted by Ap

Hypercubic effects in semileptonic decays of heavy mesons, toward B→πℓνB \to \pi \ell \nu, with Nf=2+1+1N_f=2+1+1 Twisted fermions

We present a preliminary study toward a lattice determination of the vector and scalar form factors of the $B \to \pi \ell \nu$ semileptonic decays. We compute the form factors relative to the transition between heavy-light pseudoscalar mesons, with masses above the physical D-mass, and the pion. We simulate heavy-quark masses in the range $m_c^{phys} < m_h < 2m_c^{phys}$. Lorentz symmetry breaking due to hypercubic effects is clearly observed in the data, and included in the decomposition of the current matrix elements in terms of additional form factors. We discuss the size of this breaking as the parent-meson mass increases. Our analysis is based on the gauge configurations produced by the European Twisted Mass Collaboration with $N_f = 2 + 1 + 1$ flavors of dynamical quarks at three different values of the lattice spacing and with pion masses as small as $210$ MeV.Comment: 7 pages, 5 figures; contribution to the XXXVI International Symposium on Lattice Field Theory (LATTICE2018), East Lansing (Michigan State University, USA), July 22-28, 201

Sistema a rilascio di farmaco basato su nanotubi di carbonio per lo sviluppo di neuro-interfacce innovative

Lo scopo di questo lavoro di tesi è la realizzazione di un’interfaccia neurale a rilascio di farmaco, basata sull’utilizzo di array di nanotubi di carbonio (CNT). La scelta dei nanotubi è dovuta alle caratteristiche elettriche, chimiche e di biocompatibilità che li rendono potenziali materiali per ristabilire intricate connessioni a livello neurale. Gli array di CNT sono strutture tridimensionali, in cui i nanotubi sono disposti verticalmente su un apposito substrato di silicio con una densità superficiale di circa 10^9 CNT/cm^2 . Esistono diversi lavori in letteratura che documentano l’utilizzo degli array di CNT per lo sviluppo di interfacce neurali. Recentemente è stato posto il problema dell’inglobamento di farmaci in tali matrici. Il sistema sviluppato, nell’ambito di tale studio, consiste di un array di nanotubi di carbonio, rivestito di un film sottile di PPy, un polimero conduttore, al fine di migliorare le caratteristiche meccaniche dei CNT ed evitare il fenomeno dello steaking Il sistema a rilascio di farmaco è realizzato tramite deposizione, sulla superficie dei CNT, di un film micrometrico di polimero, l’alginato, con all’interno intrappolata la proteina. La cinetica di rilascio è stata valutata tramite spettrofotometria. Infine l’interfaccia è stata validata in vitro utilizzando come linea cellulare i fibroblasti felini renali Crandell. Tali test hanno dimostrato l’efficacia del rilascio e l’attività della proteina rilasciata. L’analisi è stata condotta tramite microscopia in fluorescenza e microscopia a fascio ionico (FIB)

Is porto sinusoidal vascular disease to be actively searched in patients with portal vein thrombosis?

Porto sinusoidal vascular liver disease (PSVD) and portal vein thrombosis (PVT) are distinct vascular liver diseases characterized, respectively, by an intrahepatic and a prehepatic obstacle to the flow in the liver portal system. PVT may also occur as a complication of the natural history of PSVD, especially if a prothrombotic condition coexists. In other cases, it is associated to local and systemic pro-thrombotic conditions, even if its cause remains unknown in up to 25% despite an active search. In our opinion, the presence of PSVD should be suspected in patients with PVT especially in those with PVT "sine causa" and the active search of this condition should be included in their diagnostic work-out. However, sometimes the diagnosis of pre-existing PSVD is very hard. Biopsy cannot be fully discriminant as similar histological data have been described in both conditions. Liver stiffness may help as it has been shown to be higher in PSVD than in "pure" PVT, due to the presence of sclerosis in the portal venous radicles observable in PSVD patients. Nevertheless, comparing liver stiffness between PVT and PSVD has until now been restricted to very limited series of patients. In conclusion, even if it is still totally hypothetical, our point of view may have clinical consequences, especially when deciding to perform a liver biopsy in patients with a higher liver stiffness and suspending the anticoagulation in patients with PVT and no detectable prothrombotic factors

Masses and decay constants of Bc(∗)B_c^{(*)} mesons with Nf=2+1+1N_f=2+1+1 twisted mass fermions

We present a preliminary lattice determination of the masses and decay constants of the pseudoscalar and vector mesons $B_c$ and $B_c^*$. Our analysis is based on the gauge configurations produced by the European Twisted Mass Collaboration with $N_f = 2 + 1 + 1$ flavors of dynamical quarks. We simulated at three different values of the lattice spacing and with pion masses as small as 210 MeV. Heavy-quark masses are simulated directly on the lattice up to $\sim 3$ times the physical charm mass. The physical b-quark mass is reached using the ETMC ratio method. Our preliminary results are: $M_{B_c} = 6341\,(60)$ MeV, $f_{B_c} = 396\,(12)$ MeV, $M_{B_c^*} / M_{B_c} = 1.0037\,(39)$ and $f_{B_c^*} / f_{B_c} = 0.987\,(7)$.Comment: 7 pages, 3 figures, 1 table; contribution to the proceedings of the XXXVI Int'l Workshop on Lattice Field Theory (LATTICE2018), July 22-28, 2018, East Lansing, Michigan State University (Michigan, USA