We report on the discovery of a supermassive binary black hole system in the radio galaxy 0402+379, with a projected separation between the two black holes of just 7.3 pc. This is the closest black hole pair yet found by more than two orders of magnitude. These results are based upon recent multi-frequency observations using the Very Long Baseline Array (VLBA) which reveal two compact, variable...

In this paper a de Sitter Space version of Black Hole Complementarity is formulated which states that an observer in de Sitter Space describes the surrounding space as a sealed finite temperature cavity bounded by a horizon which allows no loss of information. We then discuss the implications of this for the existence of boundary correlators in the hypothesized dS/cft correspondence. We find th...

A retrospective study on the pattern and prevalence of colonic diverticulosis of inhibitory in Enugu, Nigeria was carried out. Radiographs and reports of past Barium Enema examinations done over a 10 year period were reviewed and analysed. The prevalence of this disease entity in our community is 6.52% with no significant difference between both sexes. This figure is lower than those of Countri...

background and objectives. integrated weed management approaches can help to decline costs weed control and improve its condition. critical period of weed control (cpwc) is defined as the best time for weeding. if cpwc is recognized we can accurately use herbicides and prevent environmental pollutions. beginning and duration of cpwc despond on some agents such as crop and weed traits, environme...

Efficient infrared lumophores are urgently needed in a host of biological sensing applications.1 Such applications demand light emitters that meet a number of requirements simultaneously. First, the light-emitting species must be stable and bright (quantum yield >10%) under biologically relevant conditions including buffered conditions. In addition, emission in the near-IR (NIR) and shortwavele...

Pregnancy-induced hypertension (PIH), also known as preeclampsia, remains one of the leading causes of maternal death worldwide. The term PIH describes the development of hypertension with proteinuria and/or pathological edema after the twentieth week of gestation. Parturients with PIH usually have multiple organ alterations (Table 1). Although the etiology of PIH is unknown, it appears obvious...

Aneurysms Unruptured Aneurysms The first report of the International Study of Unruptured Intracranial Aneurysms (ISUIA) cited very low rates of subarachnoid hemorrhage (SAH) for previously unruptured aneurysms.1 Data were collected retrospectively. It was difficult to reconcile these rates with those reported from prior studies, with the known sizes of ruptured aneurysms and with clinical exper...

Introduction MR-guidance is increasingly used for thermo-therapies such as radio frequency, laser (LITT) or focused ultrasound ablation, because MR allows for non-invasive temperature measurements. In the most commonly applied proton resonance frequency (PRF) shift thermometry, temperature differences are calculated based on phase variations with respect to a reference baseline. Since there is ...

Heiner Niemann was born on 7th January 1953 in Münster, Westphalia, Germany. After completing obligatory military service, he began to studyVeterinaryMedicine at the Veterinary University Hannover in 1973. In 1978, Heiner Niemann graduated and started the experiments for his doctoral thesis at the Institute for Farm Animal Breeding and Behaviour (FAL) in Mariensee. Two years later, in 1980, he ...