Quantum imaging of a polarisation sensitive phase pattern with hyper-entangled photons

A transparent polarisation sensitive phase pattern makes a polarisation dependent transformation of quantum state of photons without absorbing them. Such an invisible pattern can be imaged with quantum entangled photons by making joint quantum measurements on photons. This paper shows a long path experiment to quantum image a transparent polarisation sensitive phase pattern with hyper-entangled photon pairs involving momentum and polarisation degrees of freedom. In the imaging configuration, a single photon interacts with the pattern while the other photon, which has never interacted with the pattern, is measured jointly in a chosen polarisation basis and in a quantum superposition basis of its position which is equivalent to measure its momentum. Individual photons of each hyper-entangled pair cannot provide a complete image information. The image is constructed by measuring the polarisation state and position of the interacting photon corresponding to a measurement outcome of the non-interacting photon. This paper presents a detailed concept, theory and free space long path experiments on quantum imaging of polarisation sensitive phase patterns.

GLASS TUBE CLEAVING WITH PHASE-CORRECTED NON-DIFFRACTING LASER PULSES

Ultrashort laser pulses are used to modify complex inner and outer contours from glass tubes. The processing optics is designed to shape non-diffracting beams and to apply a sensitive phase correction for the processing behind curved interfaces. This enables single-pass, full-thickness modifications with feed rates in the order of 100 mm/s are demonstrated. Final article separation is performed by thermal stress or via chemical etching.

Upfront metastasis-directed therapy in oligorecurrent prostate cancer does not decrease the time from initiation of androgen deprivation therapy to castration resistance

The aim of the present study was to explore the potential impact of upfront metastases-directed therapy (MDT) in terms of prolongation of castration-sensitive phase in a series of oligorecurrent castration-sensitive prostate cancer (PC) patients. The present article is a multicenter retrospective study. The population of interest was castrate-sensitive oligorecurrent PC, defined as the presence of 1–3 uptakes in non-visceral sites such as bones or nodes detected by means of 18F-Choline PET/CT or 68-Gallium PSMA PET/CT. Primary endpoint was the time to castration resistance. Secondary endpoints were ADT-free survival, local progression-free survival, and overall survival. Eighty-two patients and 118 lesions were analyzed. The median time to castration resistance for the entire population of the study was 49 months (95% CI 43.6–54.4 months). The 1- and 2-year TTCR-free survival rates were 94% and 82%, respectively. At the time of analysis, 52 patients were still in the castration-sensitive phase of the disease. In this cohort of patients, the median ADT-free survival was 20 months (range 3–69 months). On the other hand, during follow-up 30 patients switched to the castration-resistant phase of disease. In this last group of patients, the median ADT-free survival was 20 months (range 4–50 months). After the ADT administration, the median castration-sensitive phase was 29 months (range 5–71 months). Castration resistance generally occurs at a median follow-up of 24–36 months following ADT. In the current study, upfront MDT does not decrease the time from initiation of ADT to castration resistance.

A systemic model of furniture meant for stimulating development of a child based on educational aids from M. Montessori

In furniture design, understood as a kind of evolutionary process, there is room for designer’s creativity, but not in the sense traditionally accepted in the psychology of creation. The creativity of the designer shapes the products of the evolutionary algorithm but does not replace them. This can be illustrated by the genesis of any design, such as furniture that stimulates the development of the child. The Montessori pedagogy leaves a lot of room for new designs of Montessorian teaching aids. The Montessori didactic material forms a logically structured whole. It enables the child to move out of experience and sensual cognition; it serves not only the development of the intellect but also the education of the whole personality. The Montessorian materials take into account the child’s stage of development, corresponding to a given sensitive phase and the very logic of things, so that the child, while learning, can embrace larger cognitive sequences, arouse a sense of aesthetics, motivation, curiosity and interest, thus triggering various forms of activity.

REVIEW ON GERIATRICS THROUGH AYURVEDA

In Ayurveda human life is classified in 3 states like Balyavastha, Tarunyavastha and Vardhakyavastha. Old age is supposed to be the most sensitive phase of life and needs utmost comfort and care. Today 8.5% of people worldwide are aged above 65 and over. According to 2016 report by the ministry for statistics and programme implementation, India has 103.9 million elderly, people above age 60, about 8.5% of the population. This projected growth in the older population has the potential to place significant burdens on healthcare and support services. Aims and Objectives: To study the concept of Jara and to explore the pre-ventive and possible treatment through Ayurveda. Materials and Methods: Classical texts of Ayurveda with respect to Jara and previous research work on ageing was studied, compiled, analyzed and presented in a systemic manner. Discussion: In Ashtang Ayurveda Jarachikitsa is considered as an independent separate branch which shows its importance. In Ayurveda the branch which deals with geriatric disorders is known as rejuvenating therapy (Rasayanchikitsa). Conclusion: Ayurveda is the science of life and longevity which has potential of preventing and curing geriatric diseases. Multi-dimensional approach of Ayurveda in pre-vention of early ageing and curing disorders of the elderly may provide some new hope. Present review work throws light on measures of geriatrics care through Ayurveda.

Guiding the Students in High School by Using Machine Learning

Machine learning is considered the most significant technique that processes and analyses educational big data. In this research paper, many previous papers related to analysing the educational big data that uses a lot of artificial intelligence techniques were studied. The purpose of the study is to identify weaknesses and gaps in previous researches. The results showed that many researches highlighted early expectations for academic performance. Unfortunately, no one thought of finding an effective way to guide high schooled students to reach their appropriate majors that can be suitable to their abilities. Those students need to be guided to pass this sensitive phase with high efficiency and good results. Thus, this school level is considered as the starting point for students’ academic lives, professional, and future success.

Tomographic reconstruction using tilted Laue analyser-based X-ray phase-contrast imaging

Analyser-based phase-contrast imaging (ABPCI) is a highly sensitive phase-contrast imaging method that produces high-contrast images of weakly absorbing materials. However, it is only sensitive to phase gradient components lying in the diffraction plane of the analyser crystal [i.e. in one dimension (1-D)]. In order to accurately account for and measure phase effects produced by the wavefield-sample interaction, ABPCI and other 1-D phase-sensitive methods must achieve 2-D phase gradient sensitivity. An inclined geometry method was applied to a Laue geometry setup for X-ray ABPCI through rotation of the detector and object about the optical axis. This allowed this traditionally 1-D phase-sensitive phase-contrast method to possess 2-D phase gradient sensitivity. Tomographic datasets were acquired over 360° of a multi-material phantom with the detector and sample tilted by 8°. The real and imaginary parts of the refractive index were reconstructed for the phantom.