In the studies of conductance of closed mesoscopic systems, semi-linear response theory (SLRT) offers a novel unified framework that goes beyond the traditional Kubo formulation. In this Thesis we apply SLRT to two types of mesoscopic systems. The first is disordered quasi-1d rings, where we build an analytical model to understand the departure of SLRT results from Kubo results. Guided by the n...

Red blood cells from patients with sickle cell disease (SCD) exhibit increased electrogenic cation permeability, particularly following deoxygenation and hemoglobin (Hb) polymerisation. This cation permeability, termed P(sickle), contributes to cellular dehydration and sickling, and its inhibition remains a major goal for SCD treatment. Nevertheless, its characteristics remain poorly defined, i...

Trade-off between reproducibility of neuronal activities and computational efficiency is one of crucial subjects in computational neuroscience and neuromorphic engineering. A wide variety of neuronal models have been studied from different viewpoints. The digital spiking silicon neuron (DSSN) model is a qualitative model that focuses on efficient implementation by digital arithmetic circuits. W...

Neurons in the functioning cortex fire erratically, with highly variable intervals between spikes. How much irregularity comes from the process of postsynaptic integration and how much from fluctuations in synaptic input? We have addressed these questions by recording the firing of neurons in slices of rat visual cortex in which synaptic receptors are blocked pharmacologically, while injecting ...

Experiments were conducted on Myxicola giant axons to determine if the sodium activation and inactivation processes are coupled or independent. The main experimental approach was to examine the effects of changing test pulses on steady-state inactivation curves. Arguments were presented to show that in the presence of a residual uncompensated series resistance the interpretation of the results ...

Red blood cells from patients with sickle cell disease (SCD) exhibit increased electrogenic cation permeability, particularly following deoxygenation and hemoglobin (Hb) polymerisation. This cation permeability, termed Psickle, contributes to cellular dehydration and sickling, and its inhibition remains a major goal for SCD treatment. Nevertheless, its characteristics remain poorly defined, its...

We evaluate the impact of changes in solar activity on three significant human psychophysiological parameters: skin conductance, electromyography (EMG), and share abdominal diaphragmatic breathing overall ventilation. Variations affecting psychophysiology due to directly document assertion that psychology, behavior, decision-making all reflect geomagnetic field alterations stem from variable ac...

Using benzene sandwiched between two Au leads as a model system, we investigate from first principles the change in molecular conductance caused by different atomic structures around the metal-molecule contact. Our motivation is the variable situations that may arise in break junction experiments; our approach is a combined density functional theory and Green function technique. We focus on eff...

We tested, compared and modified three models of stomatal conductance at the leaf level in a forest ecosystem where drought stress is a major factor controlling forest productivity. The models were tested against 2 years (1999 and 2000) of leaf-level measurements on ponderosa pine (Pinus ponderosa Dougl. ex Laws.) growing in the Mediterranean climate of California, USA. The Ball, Woodrow and Be...

ABSTRAKSebagian besar algoritma Maximum Power Point Tracking (MPPT), osilasi daya pada kondisi steady-state menyebabkan kerugian (losses) di sistem tersebut. Untuk menangani masalah tersebut dirancanglah Modified Incremental Conductance, dengan menggunakan kesalahan minimal yang diperbolehkan untuk mengurangi serta menambahkan variable step size mempercepat pelacakan titik maksimum. Dari hasil ...